iOS开发-实现自定义Tabbar及tabbar按钮动画效果

iOS开发-实现自定义Tabbar及tabbar按钮动画效果

之前整理了一个继承UITabbarController的Tabbar效果
查看

https://blog.csdn.net/gloryFlow/article/details/132012628

这里是继承与UIViewController的INSysTabbarViewController实现及点击tabbar按钮动画效果。

一、INSysTabbar自定义

INSysTabbar继承UIView，实现tabbarButton效果

INSysTabbar.h

#import <UIKit/UIKit.h>
#import "INSysTabbarButton.h"
#import "INSysTabbarShapeView.h"

@protocol INSysTabbarDelegate;
@interface INSysTabbar : UIView

@property (nonatomic, weak) id<INSysTabbarDelegate>tabDelegate;        //代理
@property (nonatomic, strong) UIImage *bgroundImage;                    //背景图
@property (nonatomic, strong) INSysTabbarShapeView *tabbarBGShapeView;  //背景图

@property (nonatomic, strong) UIColor *lineColor;                   //线条的颜色
@property (nonatomic, strong) NSArray *dataSources;                 //tabbarItem列表
@property (nonatomic, assign) BOOL showLine;                        //线条的颜色

@property (nonatomic, assign) NSInteger selectedIndex;              //选中的tabbar按钮index

- (instancetype)initWithFrame:(CGRect)frame;

/**
 默认设置第几个index
 */
- (void)resetSysTabbar:(NSInteger)index;

/**
 更新tabbar样式
 
 @param tabbarItem item
 */
- (void)updateTabbarStyle:(INSysTabbarItem *)tabbarItem;

@end

@protocol INSysTabbarDelegate <NSObject>

- (void)tabBar:(INSysTabbar *)tabBar tabDidSelectedIndex:(NSInteger)index;

@end

INSysTabbar.m

#import "INSysTabbar.h"
#import "UIView+SafeEdgeInsets.h"
#import "UIColor+Addition.h"

static CGFloat kLineHeight = 1.0;
static CGFloat kPadding = 5.0;

@interface INSysTabbar ()

@property (nonatomic, strong) UIImageView *bgImageView;
@property (nonatomic, strong) UIImageView *lineImageView;
@property (nonatomic, assign) CGFloat safeInsetBottom;
@property (nonatomic, strong) NSMutableArray *buttonViews;

@end

@implementation INSysTabbar

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        self.buttonViews = [NSMutableArray arrayWithCapacity:0];
        [self addSubview:self.bgImageView];
        [self addSubview:self.lineImageView];
        [self addSubview:self.tabbarBGShapeView];
        self.showLine = NO;
    }
    return self;
}

- (void)layoutSubviews {
    [super layoutSubviews];
    self.bgImageView.frame = self.bounds;
    self.tabbarBGShapeView.frame = self.bounds;
    self.safeInsetBottom = [UIView baseSafeAreaEdgeInsets].bottom;
    
    if (self.dataSources && self.dataSources.count > 0) {
        CGFloat width = CGRectGetWidth(self.bounds) / self.dataSources.count;
        CGFloat height = CGRectGetHeight(self.bounds);
        for (UIView *subView in self.subviews) {
            if ([subView isKindOfClass:[INSysTabbarButton class]]) {
                INSysTabbarButton *tabbarButton = (INSysTabbarButton *)subView;
                CGRect imageBounds = CGRectMake(0.0, 0.0, width, height);
                CGPoint imageCenter = CGPointMake((tabbarButton.tag + 0.5) * width, height/2 - self.safeInsetBottom/2);
                tabbarButton.bounds = imageBounds;
                tabbarButton.center = imageCenter;
            }
        }
    }
    
    self.lineImageView.frame = CGRectMake(0.0, 0.0, CGRectGetWidth(self.bgImageView.frame), kLineHeight);
    
    [self setTabbarSubview];
}

/**
 更新系统tabbar的选中状态
 */
- (void)updateTabbarButtons {
    for (UIView *subView in self.subviews) {
        if ([subView isKindOfClass:[INSysTabbarButton class]]) {
            INSysTabbarButton *tabbarButton = (INSysTabbarButton *)subView;
            if (tabbarButton.tag == self.selectedIndex) {
                tabbarButton.selected = YES;
            } else {
                tabbarButton.selected = NO;
            }
        }
    }
}

/**
 隐藏系统的tabbarButton
 */
- (void)setTabbarSubview {
    for (UIView *child in self.subviews) {
        Class class = NSClassFromString(@"UITabBarButton");
        if ([child isKindOfClass:class]) {
            child.hidden = YES;
        }
    }
}

/**
 重新创建tabbarButtons
 */
- (void)setupTabbarButtons {
    
    [self.buttonViews removeAllObjects];
    
    for (UIView *subView in self.subviews) {
        if ([subView isKindOfClass:[INSysTabbarButton class]]) {
            [subView removeFromSuperview];
        }
    }
    
    for (NSInteger index = 0; index < self.dataSources.count; index ++) {
        INSysTabbarItem *tabbarItem = [self.dataSources objectAtIndex:index];
        INSysTabbarButton *tabbarButton = [[INSysTabbarButton alloc] initWithFrame:CGRectZero];
        tabbarButton.userInteractionEnabled = YES;
        tabbarButton.tabbarItem = tabbarItem;
        tabbarButton.tag = index;
        tabbarButton.maxCircleSize = 40.0;
        [tabbarButton addTarget:self action:@selector(tabbarButtonSelected:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:tabbarButton];
        [self.buttonViews addObject:tabbarButton];
    }
    
    [self.bgImageView bringSubviewToFront:self.lineImageView];
    
    [self setNeedsLayout];
}

- (void)setDataSources:(NSArray *)dataSources {
    _dataSources = dataSources;
    [self setupTabbarButtons];
    [self setNeedsLayout];
}

- (void)setBgroundImage:(UIImage *)bgroundImage {
    _bgroundImage = bgroundImage;
    self.bgImageView.image = bgroundImage;
    [self setNeedsLayout];
}

- (void)setLineColor:(UIColor *)lineColor {
    _lineColor = lineColor;
    self.lineImageView.backgroundColor = lineColor;
    [self setNeedsLayout];
}

- (void)setShowLine:(BOOL)showLine {
    _showLine = showLine;
    self.lineImageView.hidden = !showLine;
    [self setNeedsLayout];
}

- (void)setSelectedIndex:(NSInteger)selectedIndex {
    _selectedIndex = selectedIndex;
    [self updateTabbarButtons];
    if (self.tabDelegate && [self.tabDelegate respondsToSelector:@selector(tabBar:tabDidSelectedIndex:)]) {
        [self.tabDelegate tabBar:self tabDidSelectedIndex:selectedIndex];
    }
}

/**
 更新tabbar样式
 
 @param tabbarItem item
 */
- (void)updateTabbarStyle:(INSysTabbarItem *)tabbarItem {
    for (UIView *subView in self.subviews) {
        if ([subView isKindOfClass:[INSysTabbarButton class]]) {
            INSysTabbarButton *tabbarButton = (INSysTabbarButton *)subView;
            INSysTabbarItem *item = tabbarButton.tabbarItem;
            if (tabbarItem.identifier && [tabbarItem.identifier isEqualToString:item.identifier]) {
                //更新tabbar
                [item copyClone:tabbarItem];
                tabbarButton.tabbarItem = item;
                break;
            }
        }
    }
}

/**
 默认设置第几个index
 */
- (void)resetSysTabbar:(NSInteger)index {
    INSysTabbarButton *selectedButton = nil;
    for (INSysTabbarButton *subButton in self.buttonViews) {
        if (subButton.tag == index) {
            selectedButton = subButton;
        }
    }
    
    if (selectedButton) {
        [self buttonClick:selectedButton];
        self.selectedIndex = selectedButton.tag;
    }
}

#pragma mark - Actions
- (void)tabbarButtonSelected:(INSysTabbarButton *)tabbarButton {
    if (self.selectedIndex != tabbarButton.tag) {
        [self buttonClick:tabbarButton];
    }
    self.selectedIndex = tabbarButton.tag;
}

- (void)buttonClick:(INSysTabbarButton *)button {
    CGRect buttonFrame = button.frame;
    self.tabbarBGShapeView.anchorPointX = CGRectGetMidX(buttonFrame);
    
    for (INSysTabbarButton *subButton in self.buttonViews) {
        subButton.hasShowedCircle = NO;
        CGRect subButtonFrame = subButton.frame;
        subButtonFrame.origin.y = 0.0;
        subButton.frame = subButtonFrame;
        [subButton reset];
    }
    
    [button circleAnimationDuration:0.5];
}

- (void)addShakeAnimation:(UIView *)view {
    CABasicAnimation* shake = [CABasicAnimation animationWithKeyPath:@"transform.translation.y"];
    shake.fromValue = [NSNumber numberWithFloat:-5];
    shake.toValue = [NSNumber numberWithFloat:5];
    shake.duration = 0.1;//执行时间
    shake.autoreverses = YES; //是否重复
    shake.repeatCount = 1;//次数
    [view.layer addAnimation:shake forKey:@"shakeAnimation"];
}

#pragma mark - GETTER
- (UIImageView *)bgImageView {
    if (!_bgImageView) {
        _bgImageView = [[UIImageView alloc] initWithFrame:CGRectZero];
        _bgImageView.backgroundColor = [UIColor clearColor];
        _bgImageView.clipsToBounds = YES;
    }
    return _bgImageView;
}

- (INSysTabbarShapeView *)tabbarBGShapeView {
    if (!_tabbarBGShapeView) {
        _tabbarBGShapeView = [[INSysTabbarShapeView alloc] initWithFrame:CGRectZero];
        _tabbarBGShapeView.buttonSize = 30.0;
        _tabbarBGShapeView.anchorPointX = 0.0;
    }
    return _tabbarBGShapeView;
}

- (UIImageView *)lineImageView {
    if (!_lineImageView) {
        _lineImageView = [[UIImageView alloc] initWithFrame:CGRectZero];
        _lineImageView.backgroundColor = [UIColor colorWithHexString:@"f3f3f3" alpha:1.0];
    }
    return _lineImageView;
}

@end

二、TabbarButton实现

UIButton继承UIControl，我这里继承UIControl实现自定义按钮

INSysTabbarButton.h

#import <UIKit/UIKit.h>
#import "INSysTabbarItem.h"

@interface INSysTabbarButton : UIControl

@property (nonatomic, strong) UIImageView *bkImageView;
@property (nonatomic, strong) INSysTabbarItem *tabbarItem;
@property (nonatomic, assign) BOOL hasShowedCircle;   // 当前显示的
@property (nonatomic) CGFloat maxCircleSize;             // circle的size

- (instancetype)initWithFrame:(CGRect)frame;

- (void)reset;

- (void)circleAnimationDuration:(CGFloat)aDuration;

@end

INSysTabbarButton.m

#import "INSysTabbarButton.h"
#import "NSString+Size.h"

static CGFloat kIconSize = 26.0;
static CGFloat kTitleHeight = 18.0;
static CGFloat kBadgeSize = 8.0;
static CGFloat kPadding = 5.0;
static CGFloat defaultBadgeRadius = 9.0;
static CGFloat defaultDotRadius = 5.0;

#define kTabbarDotShown @"dotShown"
#define kTabbarBadge @"badge"

@interface INSysTabbarButton ()

@property (nonatomic, strong) UIImageView *iconImageView;
@property (nonatomic, strong) UIImageView *badgeImageView;
@property (nonatomic, strong) UILabel *titleLabel;
@property (nonatomic, strong) UILabel *badgeLabel;

@end

@implementation INSysTabbarButton

#pragma mark - INIT
- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self addSubview:self.bkImageView];
        [self addSubview:self.iconImageView];
        [self addSubview:self.titleLabel];
        [self addSubview:self.badgeImageView];
        [self addSubview:self.badgeLabel];
    }
    return self;
}

- (void)layoutSubviews {
    [super layoutSubviews];
        
    CGSize titleSize = [self.titleLabel.text sizeWithFont:self.titleLabel.font forMaxSize:CGSizeMake(CGRectGetWidth(self.bounds), kTitleHeight)];
    
    CGFloat titleHeight = MIN(ceil(titleSize.height), kTitleHeight);
    
    CGFloat iconSize = 0.0;
    if (self.iconImageView.image) {
        iconSize = kIconSize;
    }
    self.titleLabel.frame = CGRectMake(0.0, CGRectGetHeight(self.bounds) - kPadding - titleHeight, CGRectGetWidth(self.bounds), titleHeight);
    
    if (self.hasShowedCircle) {
        self.iconImageView.frame = CGRectMake((CGRectGetWidth(self.bounds) - iconSize)/2, CGRectGetMinY(self.titleLabel.frame) - self.maxCircleSize + (self.maxCircleSize - iconSize)/2, iconSize, iconSize);
    } else {
        self.iconImageView.frame = CGRectMake((CGRectGetWidth(self.bounds) - iconSize)/2, CGRectGetMinY(self.titleLabel.frame) - iconSize, iconSize, iconSize);
    }
    
    self.bkImageView.center = self.iconImageView.center;
    
    CGSize badgeSize = [self.badgeLabel.text sizeWithFont:self.badgeLabel.font forMaxSize:CGSizeMake(20.0, 20.0)];
    CGFloat minWidth = MAX(defaultBadgeRadius * 2, badgeSize.width + 10.0);
    CGFloat minHight = MAX(defaultBadgeRadius * 2, badgeSize.height);
    
    CGRect badgeBounds = CGRectMake(0.0, 0.0, minWidth, minHight);
    CGPoint badgeCenter = CGPointMake(CGRectGetMidX(self.iconImageView.frame) + CGRectGetHeight(badgeBounds), CGRectGetMidY(self.iconImageView.frame) - CGRectGetHeight(badgeBounds)/2 + 5.0);
    self.badgeLabel.bounds = badgeBounds;
    self.badgeLabel.center = badgeCenter;
    self.badgeLabel.layer.cornerRadius = minHight / 2;
}

#pragma mark - SETTER
- (void)setTabbarItem:(INSysTabbarItem *)tabbarItem {
    _tabbarItem = tabbarItem;
    
    //设置icon
    self.iconImageView.image = tabbarItem.image;
    
    //设置标题
    self.titleLabel.font = tabbarItem.titleFont;
    self.titleLabel.textColor = tabbarItem.titleColor;
    self.titleLabel.text = [NSString stringWithFormat:@"%@",(tabbarItem.title?tabbarItem.title:@"")];
    
    //设置红点
    self.badgeImageView.hidden = !tabbarItem.dotShown;
    
    //设置badge
    self.badgeLabel.backgroundColor = tabbarItem.badgeColor;
    self.badgeLabel.text = [NSString stringWithFormat:@"%@",(tabbarItem.badge?tabbarItem.badge:@"")];
    if(tabbarItem.badge && tabbarItem.badge.length > 0) {
        self.badgeLabel.hidden = NO;
    } else {
        self.badgeLabel.hidden = YES;
    }
    
    [self addObserver];
    [self setNeedsLayout];
}

- (void)setSelected:(BOOL)selected {
    [super setSelected:selected];
    if (selected) {
        self.titleLabel.textColor = self.tabbarItem.selectedTitleColor;
        self.iconImageView.image = self.tabbarItem.selectedImage;
    } else {
        self.titleLabel.textColor = self.tabbarItem.titleColor;
        self.iconImageView.image = self.tabbarItem.image;
    }
}

- (void)setHasShowedCircle:(BOOL)hasShowedCircle {
    _hasShowedCircle = hasShowedCircle;
    if (hasShowedCircle) {
        self.bkImageView.alpha = 1.0;
    } else {
        self.bkImageView.alpha = 0.0;
    }
}

- (void)circleAnimationDuration:(CGFloat)aDuration {
    self.hasShowedCircle = YES;
    self.bkImageView.alpha = 0.0;
    self.bkImageView.transform = CGAffineTransformMakeScale(0.1, 0.1);

    CGRect iconFrame = self.iconImageView.frame;
    iconFrame.origin.y = CGRectGetMinY(self.titleLabel.frame) - self.maxCircleSize + (self.maxCircleSize - iconFrame.size.height)/2;
    
    [UIView animateWithDuration:aDuration animations:^{
        self.bkImageView.transform = CGAffineTransformMakeScale(1.0, 1.0);
        self.bkImageView.alpha = 1.0;
        self.iconImageView.frame = iconFrame;
    } completion:^(BOOL finished) {
        [self.iconImageView.layer removeAnimationForKey:@"shakeAnimation"];
        [self startIconShakeAnimation];
    }];
}

- (void)startIconShakeAnimation {
    CABasicAnimation* shake = [CABasicAnimation animationWithKeyPath:@"transform.translation.y"];
    shake.fromValue = [NSNumber numberWithFloat:-3];
    shake.toValue = [NSNumber numberWithFloat:3];
    shake.duration = 0.15;//执行时间
    shake.autoreverses = YES; //是否重复
    shake.repeatCount = 1;//次数
    [self.iconImageView.layer addAnimation:shake forKey:@"shakeAnimation"];
}

- (void)reset {
    self.hasShowedCircle = NO;
    [self layoutSubviews];
    [self.iconImageView.layer removeAnimationForKey:@"shakeAnimation"];
}

#pragma mark - GETTER
- (UIImageView *)bkImageView {
    if (!_bkImageView) {
        _bkImageView = [[UIImageView alloc] initWithFrame:CGRectZero];
        _bkImageView.backgroundColor = [UIColor colorWithHexString:@"ff244c" alpha:0.25];
        _bkImageView.contentMode = UIViewContentModeScaleAspectFit;
        _bkImageView.clipsToBounds = YES;
        _bkImageView.frame = CGRectMake(0.0, 0.0, 40.0, 40.0);
        _bkImageView.layer.cornerRadius = 20.0;
        _bkImageView.layer.masksToBounds = YES;
        _bkImageView.alpha = 0.0;
    }
    return _bkImageView;
}

- (UIImageView *)iconImageView {
    if (!_iconImageView) {
        _iconImageView = [[UIImageView alloc] initWithFrame:CGRectZero];
        _iconImageView.backgroundColor = [UIColor clearColor];
        _iconImageView.contentMode = UIViewContentModeScaleAspectFit;
        _iconImageView.clipsToBounds = YES;
    }
    return _iconImageView;
}

- (UIImageView *)badgeImageView {
    if (!_badgeImageView) {
        _badgeImageView = [[UIImageView alloc] initWithFrame:CGRectZero];
        _badgeImageView.backgroundColor = [UIColor clearColor];
        _badgeImageView.frame = CGRectMake(0.0, 0.0, kBadgeSize, kBadgeSize);
        _badgeImageView.layer.cornerRadius = kBadgeSize/2;
        _badgeImageView.layer.masksToBounds = YES;
        _badgeImageView.hidden = YES;
    }
    return _badgeImageView;
}

- (UILabel *)titleLabel {
    if (!_titleLabel) {
        _titleLabel = [[UILabel alloc]initWithFrame:CGRectZero];
        _titleLabel.backgroundColor = [UIColor clearColor];
        _titleLabel.textAlignment = NSTextAlignmentCenter;
    }
    return _titleLabel;
}

- (UILabel *)badgeLabel {
    if (!_badgeLabel) {
        _badgeLabel = [[UILabel alloc]initWithFrame:CGRectZero];
        _badgeLabel.backgroundColor = [UIColor clearColor];
        _badgeLabel.textAlignment = NSTextAlignmentCenter;
        _badgeLabel.clipsToBounds = YES;
        _badgeLabel.textColor = [UIColor whiteColor];
        _badgeLabel.font = [UIFont systemFontOfSize:11];
    }
    return _badgeLabel;
}

#pragma mark KVO Refresh
- (void)addObserver{
    __weak typeof(self) weakSelf = self;
    [self.KVOController observe:self.tabbarItem keyPath:kTabbarBadge options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNew block:^(id  _Nullable observer, id  _Nonnull object, NSDictionary<NSString *,id> * _Nonnull change) {
        if ([change objectForKey:NSKeyValueChangeNewKey]) {
            __strong typeof(weakSelf) strongSelf = weakSelf;
            NSString *badge = weakSelf.tabbarItem.badge;
            weakSelf.badgeLabel.text = [NSString stringWithFormat:@"%@",(badge?badge:@"")];
            if(badge && badge.length > 0) {
                strongSelf.badgeLabel.hidden = NO;
            } else {
                strongSelf.badgeLabel.hidden = YES;
            }
            [strongSelf setNeedsLayout];
        }
    }];

    [self.KVOController observe:self.tabbarItem keyPath:kTabbarDotShown options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNew block:^(id  _Nullable observer, id  _Nonnull object, NSDictionary<NSString *,id> * _Nonnull change) {
        if ([change objectForKey:NSKeyValueChangeNewKey]) {
            __strong typeof(weakSelf) strongSelf = weakSelf;
            strongSelf.badgeImageView.hidden = !strongSelf.tabbarItem.dotShown;
            [strongSelf setNeedsLayout];
        }
    }];
}

- (void)removeObserver{
    [self.KVOController unobserveAll];
}

- (void)dealloc {
    [self removeObserver];
}
@end

三、实现切换点击按钮动画效果

当点击tabbar按钮时候，被点击的按钮上移，tabbar显示凸起效果。实现CAShapeLayer结合path，最后由CADisplayLink控制动画效果。

代码如下

INSysTabbarShapeView.h

#import <UIKit/UIKit.h>
#import "UIColor+Addition.h"

@interface INSysTabbarShapeView : UIView

@property (nonatomic, assign) CGFloat anchorPointX; // 圆角的中心点
@property (nonatomic, assign) CGFloat buttonSize; // 按钮的大小

@end

INSysTabbarShapeView.m

#import "INSysTabbarShapeView.h"

@interface INSysTabbarShapeView ()

@property (nonatomic, strong) CAShapeLayer *shapeLayer;
@property (nonatomic, strong) UIBezierPath *path;
@property (nonatomic, strong) CADisplayLink *displayLink;
@property (nonatomic, assign) int currentFrame;
@property (nonatomic, assign) BOOL animationStepOne;
@property (nonatomic, assign) BOOL animationStepTwo;

@end

@implementation INSysTabbarShapeView

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self.layer addSublayer:self.shapeLayer];
                
        self.displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(updateShapeConfig)];
        [self.displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
        self.displayLink.paused = YES;
        
        [self configPath:0.0 btnSize:0.0];
    }
    return self;
}

- (void)configPath:(CGFloat)btnScale btnSize:(CGFloat)btnSize{
    
    CGFloat width = CGRectGetWidth(self.bounds);
    CGFloat height = CGRectGetHeight(self.bounds);
    
    CGFloat btnWidth = btnScale*btnSize;
    
    CGFloat distance = btnScale*10;
        
    CGPoint pointA = CGPointMake(0.0, 0.0);
    CGPoint pointB = CGPointMake(0.0, height);

    CGPoint pointC = CGPointMake(width, height);
    CGPoint pointD = CGPointMake(width, 0.0);
    
    CGPoint pointF = CGPointMake(self.anchorPointX + btnWidth + distance, 0.0);
    CGPoint pointE = CGPointMake(self.anchorPointX - btnWidth - distance, 0.0);
    
    CGPoint pointK = CGPointMake(pointE.x+distance, 0.0);
    CGPoint pointL = CGPointMake(pointF.x-distance, 0.0);

    CGPoint pointH = CGPointMake(pointK.x+distance, -btnWidth/4);
    CGPoint pointI = CGPointMake(pointL.x-distance, -btnWidth/4);

    CGPoint pointG = CGPointMake(self.anchorPointX, -btnWidth*3.5/4);

    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:pointA];
    [path addLineToPoint:pointB];
    [path addLineToPoint:pointC];
    [path addLineToPoint:pointD];
    [path addLineToPoint:pointF];

    [path addQuadCurveToPoint:pointI controlPoint:pointL];

    [path addQuadCurveToPoint:pointH controlPoint:pointG];

    [path addQuadCurveToPoint:pointE controlPoint:pointK];

    [path addLineToPoint:pointA];

    [path closePath];

    self.shapeLayer.path = path.CGPath;
}

- (void)setAnchorPointX:(CGFloat)anchorPointX {
    _anchorPointX = anchorPointX;
    self.currentFrame = 1;
    self.animationStepOne = NO;
    self.animationStepTwo = NO;
    self.displayLink.paused = NO;
}

- (void)setButtonSize:(CGFloat)buttonSize {
    _buttonSize = buttonSize;
}

- (void)updateShapeConfig {
    // 先放大的大一点，之后回到正常的大小
    if (!self.animationStepOne) {
        CGFloat animationDuration = 0.5;
        int maxFrames = animationDuration / self.displayLink.duration;
        self.currentFrame++;
        
        CGFloat scale = 1.0;
        if (self.currentFrame <= maxFrames) {
            scale = ((CGFloat)(_currentFrame) / (CGFloat)(maxFrames));
        }else {
            scale = 1.0;
            self.animationStepOne = YES;
            self.animationStepTwo = NO;
            
            // 第二阶段时间为0.15，maxFrames为
            CGFloat stepTwoAnimationDuration = 0.35;
            int stepTwoMaxFrames = stepTwoAnimationDuration / self.displayLink.duration;
            self.currentFrame = stepTwoMaxFrames;
        }
        
        [self configPath:scale btnSize:self.buttonSize*1.1];
    } else {
        if (!self.animationStepTwo) {
            CGFloat animationDuration = 0.35;
            int maxFrames = animationDuration / self.displayLink.duration;
            self.currentFrame--;
            
            CGFloat scale = 1.0;
            if (self.currentFrame > 1 && scale > 0.9) {
                scale = 1.0 - ((CGFloat)(_currentFrame) / (CGFloat)(maxFrames));
            }else {
                scale = 0.9;
                self.currentFrame = 1;
                self.animationStepTwo = YES;
                self.displayLink.paused = YES;
            }
            
            if (scale < 0.9) {
                scale = 0.9;
                
                self.currentFrame = 1;
                self.animationStepTwo = YES;
                self.displayLink.paused = YES;
            }
            
            [self configPath:scale btnSize:self.buttonSize*1.1];
        }
    }
}

#pragma mark - SETTER/GETTER
- (CAShapeLayer *)shapeLayer {
    if (!_shapeLayer) {
        _shapeLayer = [CAShapeLayer layer];
        _shapeLayer.fillColor = [UIColor whiteColor].CGColor;
        _shapeLayer.shadowColor = [UIColor colorWithHexString:@"acacac"].CGColor;
        _shapeLayer.shadowOffset = CGSizeMake(0, -1);
        _shapeLayer.shadowOpacity = 0.25;
        _shapeLayer.shadowRadius = 2.0;
    }
    return _shapeLayer;
}

@end

四、实现Tabbar的INSysTabbarViewController控制器

INSysTabbarViewController继承UIViewController

通过在viewDidLoad中将Tabbar放置到view。

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.exclusiveTouch = YES;
    
    // iOS 7.0 以上系统的处理
    self.automaticallyAdjustsScrollViewInsets = NO;
    self.extendedLayoutIncludesOpaqueBars = YES;
    self.edgesForExtendedLayout = UIRectEdgeAll;
    self.navigationController.navigationBar.translucent = NO;
    
    // 将tabbar放置到view上
    [self.view addSubview:self.sysTabbar];
}

在点击tabbar按钮进行切换显示对应的controller时候，实现tabbar的delegate

#pragma mark - SDTabBarDelegate
- (void)tabBar:(INSysTabbar *)tabBar tabDidSelectedIndex:(NSInteger)index {
    self.selectedIndex = index;
    
    UIViewController *viewController = [self.viewControllers objectAtIndex:index];
    viewController.view.tag = index;
    viewController.view.frame = CGRectMake(0.0, 0.0, kTabScreenWidth, kTabScreenHeight);
    [self.view insertSubview:viewController.view belowSubview:self.sysTabbar];
    [self addChildViewController:viewController];
}

将需要显示的controller显示的insertSubview。

INSysTabbarViewController代码如下

INSysTabbarViewController.h

#import <UIKit/UIKit.h>
#import "INSysTabbar.h"
#import "UIView+SafeEdgeInsets.h"
#import "UIViewController+SysTabbarItem.h"
#import "SDBaseViewController.h"

@interface INSysTabbarViewController : SDBaseViewController

// 如果是tabbar嵌套Navigation时候，这个selectedNavigationController不为null
// 如果Navigation嵌套tabbar时候，这个selectedNavigationController可能为null
@property (nonatomic, strong, readonly) UINavigationController *selectedNavigationController;

@property (nonatomic, strong) NSArray *tabViewControllers;
@property (nonatomic, strong) INSysTabbar *sysTabbar;
@property (nonatomic, assign) NSInteger selectedIndex;

- (void)reset;

@end

INSysTabbarViewController.m

#import "INSysTabbarViewController.h"
#import "UIViewController+SysTabbarItem.h"
#import "UIImage+Color.h"

#define kTabScreenWidth [UIScreen mainScreen].bounds.size.width
#define kTabScreenHeight [UIScreen mainScreen].bounds.size.height

#define K_TAB_DEFAULT_INDEX  0

@interface INSysTabbarViewController ()<INSysTabbarDelegate>

@property (nonatomic, strong, readwrite) UINavigationController *selectedNavigation;
@property (nonatomic, assign) float systemTabBarHeight;
@property (nonatomic, strong) NSArray *viewControllers;
@property (nonatomic, assign) BOOL isViewApeared;

@end

@implementation INSysTabbarViewController

- (instancetype)init
{
    self = [super init];
    if (self) {
        self.isViewApeared = NO;
        
        UIEdgeInsets aSafeEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, 0.0, 0.0);
        if (@available(iOS 11.0, *)) {
            UIEdgeInsets safeInsets = [UIApplication sharedApplication].keyWindow.safeAreaInsets;
            aSafeEdgeInsets = safeInsets;
        } else {
            // Fallback on earlier versions
        }
        
        UITabBarController *systemTabbar = [[UITabBarController alloc] init];
        self.systemTabBarHeight = systemTabbar.tabBar.frame.size.height + aSafeEdgeInsets.bottom;
        
        self.sysTabbar = [[INSysTabbar alloc] initWithFrame:CGRectZero];
        self.sysTabbar.frame = CGRectMake(0.0, kTabScreenHeight - self.systemTabBarHeight, kTabScreenWidth, self.systemTabBarHeight);
        self.sysTabbar.tabDelegate  = self;
        
        UIImage *bgImage = [UIImage imageWithColor:[UIColor colorWithWhite:1.0 alpha:1.0]];
        self.sysTabbar.bgroundImage = bgImage;
    }
    return self;
}


- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.exclusiveTouch = YES;
    
    // iOS 7.0 以上系统的处理
    self.automaticallyAdjustsScrollViewInsets = NO;
    self.extendedLayoutIncludesOpaqueBars = YES;
    self.edgesForExtendedLayout = UIRectEdgeAll;
    self.navigationController.navigationBar.translucent = NO;
    
    // 将tabbar放置到view上
    [self.view addSubview:self.sysTabbar];
}

- (void)loadView {
    [super loadView];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    
    if (!self.isViewApeared) {
        [self.sysTabbar resetSysTabbar:K_TAB_DEFAULT_INDEX];
        self.isViewApeared = YES;
    }
}

- (void)viewDidDisappear:(BOOL)animated {
    [super viewDidDisappear:animated];
}

#pragma mark - SETTER
- (void)setTabViewControllers:(NSArray *)tabViewControllers {
    _tabViewControllers = tabViewControllers;
    
    NSMutableArray *tabbarItems = [NSMutableArray arrayWithCapacity:0];
    for (UIViewController *viewController in tabViewControllers) {
        INSysTabbarItem *item = nil;
        if ([viewController isKindOfClass:[UINavigationController class]]) {
            item = ((UIViewController *)((UINavigationController *)viewController).viewControllers.firstObject).sysTabBarItem;
        } else {
            item = viewController.sysTabBarItem;
        }
        [tabbarItems addObject:item];
        
        // 添加子Controller
        [self addChildViewController:viewController];
    }
    
    self.sysTabbar.dataSources = tabbarItems;
    
    self.viewControllers = tabViewControllers;
}

#pragma mark - SDTabBarDelegate
- (void)tabBar:(INSysTabbar *)tabBar tabDidSelectedIndex:(NSInteger)index {
    self.selectedIndex = index;
    
    UIViewController *viewController = [self.viewControllers objectAtIndex:index];
    viewController.view.tag = index;
    viewController.view.frame = CGRectMake(0.0, 0.0, kTabScreenWidth, kTabScreenHeight);
    [self.view insertSubview:viewController.view belowSubview:self.sysTabbar];
    [self addChildViewController:viewController];
}

#pragma mark - reset
- (void)reset {
    [self.viewControllers enumerateObjectsUsingBlock:^(__kindof UIViewController * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        if ([obj isKindOfClass:[UINavigationController class]]) {
            [(UINavigationController *)obj popToRootViewControllerAnimated:NO];
        }
    }];
    
    [self.sysTabbar setSelectedIndex:K_TAB_DEFAULT_INDEX];
}

- (UINavigationController *)selectedNavigationController {
    UIViewController *viewController = [self.viewControllers objectAtIndex:self.selectedIndex];
    if (viewController.navigationController) {
        return viewController.navigationController;
    }
    
    return nil;
}

#pragma mark - didReceiveMemoryWarning
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

五、使用到的TabbarItem

TabbarItem定义显示的按钮icon，按钮标题，badge等

INSysTabbarItem.h

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface INSysTabbarItem : NSObject

@property (nonatomic, strong) NSString *identifier;
@property (nonatomic, strong) NSString *title;
@property (nonatomic, strong) UIFont *titleFont;
@property (nonatomic, strong) UIImage *image;
@property (nonatomic, strong) UIImage *selectedImage;
@property (nonatomic, strong) UIColor *titleColor;
@property (nonatomic, strong) UIColor *selectedTitleColor;
@property (nonatomic, strong) UIColor *badgeColor;
@property (nonatomic, strong) NSString *badge;
@property (nonatomic, assign) BOOL dotShown;

/**
 赋值
 
 @param item item
 */
- (void)copyClone:(INSysTabbarItem *)item;

- (id)initWithTitle:(NSString *)title
          titleFont:(UIFont *)titleFont
              image:(UIImage *)image
      selectedImage:(UIImage *)selectedImage
         titleColor:(UIColor *)titleColor
 selectedTitleColor:(UIColor *)selectedTitleColor
         badgeColor:(UIColor *)badgeColor;

@end

INSysTabbarItem.m

#import “INSysTabbarItem.h”

@implementation INSysTabbarItem

- (id)initWithTitle:(NSString *)title
          titleFont:(UIFont *)titleFont
              image:(UIImage *)image
      selectedImage:(UIImage *)selectedImage
         titleColor:(UIColor *)titleColor
 selectedTitleColor:(UIColor *)selectedTitleColor
         badgeColor:(UIColor *)badgeColor {
    self = [super init];
    if (self) {
        self.title = title;
        self.titleFont = titleFont;
        self.image = image;
        self.selectedImage = selectedImage;
        self.titleColor = titleColor;
        self.selectedTitleColor = selectedTitleColor;
        self.badge = [[NSString alloc] init];
        self.dotShown = NO;
        self.badgeColor = badgeColor;
    }
    return self;
}

/**
 赋值
 
 @param item item
 */
- (void)copyClone:(INSysTabbarItem *)item {
    self.title = item.title;
    self.image = item.image;
    self.selectedImage = item.selectedImage;
    self.titleColor = item.titleColor;
    self.selectedTitleColor = item.selectedTitleColor;
    self.badgeColor = item.badgeColor;
}

@end

六、为UIViewController添加扩展属性sysTabBarItem

UIViewController+SysTabbarItem.h

#import <UIKit/UIKit.h>
#import "INSysTabbarItem.h"

@interface UIViewController (SysTabbarItem)

@property (nonatomic, strong) INSysTabbarItem *sysTabBarItem;

@end

UIViewController+SysTabbarItem.m

#import "UIViewController+SysTabbarItem.h"
#import <objc/runtime.h>

static const void *sysTabBarItemKey = &sysTabBarItemKey;

@implementation UIViewController (SysTabbarItem)

- (INSysTabbarItem *)sysTabBarItem {
    return objc_getAssociatedObject(self, sysTabBarItemKey);
}

- (void)setSysTabBarItem:(INSysTabbarItem *)sysTabBarItem {
    objc_setAssociatedObject(self, sysTabBarItemKey, sysTabBarItem, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

@end

七、小结

iOS开发-实现自定义Tabbar及tabbar按钮动画效果。

学习记录，每天不停进步。