小白随手NavigationBar简单封装

小白随手NavigationBar简单封装

新建一个NSObject 的model

#import 

@interface DzyNavModel : NSObject
@property (nonatomic ) NSString *leftImg;
@property (nonatomic ) NSString *leftBtn;

@property (nonatomic ) NSString *centerImg;
@property (nonatomic ) NSString *centerBtn;

@property (nonatomic ) NSString *rightImg;
@property (nonatomic ) NSString *rightBtn;

@property (nonatomic ) UIColor *color;
@property (nonatomic ) UIImage *backImg;

然后新建一个UIView .h的实现

#import 

#import "DzyNavModel.h"

@protocol DzyNavigationDelegate 

- (void)dzyNavLeftWithBtn:(UIButton *)btn;
- (void)dzyNavRightWithBtn:(UIButton *)btn;

@end

@interface DzyNavigation : UIView

@property (nonatomic ) void (^dzyLeft)(UIButton *btn);
@property (nonatomic ) void (^dzyRight)(UIButton *btn);

@property (nonatomic ) idDzyNavigationDelegate;
@property (nonatomic ) DzyNavModel*model;

@end

.m的实现

#import "DzyNavigation.h"
#import "Masonry.h"

@interface DzyNavigation ()

@property (nonatomic ) UIImageView *leftImg;
@property (nonatomic ) UIButton *leftBtn;

@property (nonatomic ) UIImageView *centerImg;
@property (nonatomic ) UIButton *centerBtn;

@property (nonatomic ) UIImageView *rightImg;
@property (nonatomic ) UIButton *rightBtn;

@property (nonatomic ) UIView *barView;

@end

@implementation DzyNavigation


- (void)toLeft:(UIButton *)btn{
    
    if (self.DzyNavigationDelegate && [self.DzyNavigationDelegate respondsToSelector:@selector(dzyNavLeftWithBtn:)]) {
        [self.DzyNavigationDelegate dzyNavLeftWithBtn:btn];
    }
    
    if (_dzyLeft) {
        _dzyLeft(btn);
    }
    
}

- (void)toRight:(UIButton *)btn{

    if (self.DzyNavigationDelegate && [self.DzyNavigationDelegate respondsToSelector:@selector(dzyNavRightWithBtn:)]) {
        [self.DzyNavigationDelegate dzyNavRightWithBtn:btn];
    }
    
    if (_dzyRight) {
        _dzyRight(btn);
    }
}

- (void)setModel:(DzyNavModel *)model{
    
    _model = model;
    
    _barView.backgroundColor = model.color;
    _barView.layer.contents = (__bridge id _Nullable)(model.backImg.CGImage);

    [_leftBtn setTitle:model.leftBtn forState:UIControlStateNormal];
    if (![NSString isEmpty:model.leftImg]) _leftImg.image = [UIImage imageNamed:model.leftImg];
    [_centerBtn setTitle:model.centerBtn forState:UIControlStateNormal];
    _centerImg.image = [UIImage imageNamed:model.centerImg];
    [_rightBtn setTitle:model.rightBtn forState:UIControlStateNormal];
    _rightImg.image = [UIImage imageNamed:model.rightImg];
    
    CGSize rightSize = CGSizeMake(44, 44);
    
    if ([NSString isEmpty:model.rightBtn]){
    
    }else{
        CGSize rightSize = [HubTools changeStationWidth:model.rightBtn andWithWidth:MAXFLOAT orWithHeight:40 anfont:16];

        if (rightSize.width>44) {
            [_rightBtn updateConstraints:^(MASConstraintMaker *make) {
                make.right.equalTo(self.right).offset(-10);
                make.top.equalTo(self).offset(20);
                make.height.equalTo(44);
                make.width.equalTo(rightSize.width+10);
            }];
        }
    }
    
    CGSize leftSize = CGSizeMake(44, 44);
    
    if ([NSString isEmpty:model.leftBtn]) {
        
    }else{
        CGSize leftSize = [HubTools changeStationWidth:model.leftBtn andWithWidth:MAXFLOAT orWithHeight:40 anfont:16];

        if (leftSize.width>44) {
            [_leftBtn updateConstraints:^(MASConstraintMaker *make) {
                make.left.equalTo(self).offset(10);
                make.top.equalTo(self).offset(20);
                make.height.equalTo(44);
                make.width.equalTo(leftSize.width+10);
            }];
        }
    }
    
    if (leftSize.width>=rightSize.width) {
        [_centerBtn updateConstraints:^(MASConstraintMaker *make) {
            make.centerX.equalTo(self);
            make.width.equalTo(P_w-(leftSize.width+10)*2);
            make.top.equalTo(self).offset(20);
            make.height.equalTo(44);
        }];
    }else{
        [_centerBtn updateConstraints:^(MASConstraintMaker *make) {
            make.centerX.equalTo(self);
            make.width.equalTo(P_w-(rightSize.width+10)*2);
            make.top.equalTo(self).offset(20);
            make.height.equalTo(44);
        }];
    }
    
}

- (UIImageView *)leftImg{
    if (!_leftImg) {
        UIImageView *img = [[UIImageView alloc] init];
        img.image = [UIImage imageNamed:@"pyq-fh"];
        img.contentMode = UIViewContentModeScaleAspectFit;
        _leftImg = img;
    }
    return _leftImg;
}
- (UIImageView *)centerImg{
    if (!_centerImg) {
        UIImageView *img = [[UIImageView alloc] init];
        img.contentMode = UIViewContentModeScaleAspectFit;
        _centerImg = img;
    }
    return _centerImg;
}
- (UIImageView *)rightImg{
    if (!_rightImg) {
        UIImageView *img = [[UIImageView alloc] init];
        img.contentMode = UIViewContentModeScaleAspectFit;
        _rightImg = img;
    }
    return _rightImg;
}

- (UIButton *)leftBtn{
    
    if (!_leftBtn) {
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
        btn.titleLabel.font = [UIFont systemFontOfSize:16];
        [btn addTarget:self action:@selector(toLeft:) forControlEvents:UIControlEventTouchUpInside];
        _leftBtn = btn;
    }
    return _leftBtn;
}
- (UIButton *)centerBtn{
    
    if (!_centerBtn) {
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
        btn.titleLabel.font = [UIFont systemFontOfSize:18];
        _centerBtn = btn;
    }
    return _centerBtn;
}
- (UIButton *)rightBtn{
    
    if (!_rightBtn) {
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
        btn.titleLabel.font = [UIFont systemFontOfSize:16];
        [btn addTarget:self action:@selector(toRight:) forControlEvents:UIControlEventTouchUpInside];
        _rightBtn = btn;
    }
    return _rightBtn;
}

- (instancetype)initWithFrame:(CGRect)frame{

    if (self == [super initWithFrame:frame]) {
    
        [self createUI];

    }
    return self;
}

- (void)configUI{

    [_leftBtn makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self).offset(10);
        make.top.equalTo(self).offset(20);
        make.height.equalTo(44);
        make.width.equalTo(44);
    }];
    
    [_leftImg makeConstraints:^(MASConstraintMaker *make) {
        make.center.equalTo(_leftBtn);
        make.width.and.height.equalTo(20);
    }];
    
    [_rightBtn makeConstraints:^(MASConstraintMaker *make) {
        make.right.equalTo(self.right).offset(-10);
        make.top.equalTo(self).offset(20);
        make.height.equalTo(44);
        make.width.equalTo(44);
    }];
    
    [_rightImg makeConstraints:^(MASConstraintMaker *make) {
        make.center.equalTo(_rightBtn);
        make.width.and.height.equalTo(10);
    }];

    [_centerBtn makeConstraints:^(MASConstraintMaker *make) {
        make.centerX.equalTo(self);
        make.width.equalTo(P_w-108);
        make.top.equalTo(self).offset(20);
        make.height.equalTo(44);
    }];
    
    [_centerImg makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(_centerBtn);
    }];
    
}

- (void)createUI{
    
    UINavigationBar *bar = [[UINavigationBar alloc] initWithFrame:self.bounds];
    self.barView = [[UIView alloc]initWithFrame:self.bounds];
    self.barView.backgroundColor = [UIColor whiteColor];
    [bar addSubview:_barView];
    [self addSubview:bar];
    
    [_barView addSubview:self.leftBtn];
    [_leftBtn addSubview:self.leftImg];
    [_barView addSubview:self.centerBtn];
    [_centerBtn addSubview:self.centerImg];
    [_barView addSubview:self.rightBtn];
    [_rightBtn addSubview:self.rightImg];
    [self configUI];
    
}

@end

中间有两个方法 一个是计算size的

#pragma mark 自动计算高度的类方法
+(CGSize)changeStationWidth:(NSString *)string andWithWidth:(CGFloat)width orWithHeight:(CGFloat)height anfont:(CGFloat)fontSize;{
    
    UIFont * tfont = [UIFont systemFontOfSize:fontSize];
    //高度估计文本大概要显示几行，宽度根据需求自己定义。 MAXFLOAT 可以算出具体要多高
    CGSize size =CGSizeMake(width,height);
    //    获取当前文本的属性
    NSDictionary * tdic = [NSDictionary dictionaryWithObjectsAndKeys:tfont,NSFontAttributeName,nil];
    //ios7方法，获取文本需要的size，限制宽度
    CGSize  actualsize =[string boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin  attributes:tdic context:nil].size;
    return actualsize;
}

一个是判断字符串的 类别

#pragma mark 判字符串空
+ (BOOL)isEmpty:(NSString *)string
{
    return string == nil || string.length == 0;
}

最后附上用法

leftbtn 默认是给设置一张返回图片 其他看个人需要设置

#import "DzyNavigation.h"
#import "DzyNavModel.h"
#define WS(weakSelf)  __weak __typeof(&*self)weakSelf = self;
#define UIColorFromHex(s)  [UIColor colorWithRed:(((s & 0xFF0000) >> 16))/255.0 green:(((s &0xFF00) >>8))/255.0 blue:((s &0xFF))/255.0 alpha:1.0]

//在需要用的地方 
    DzyNavigation *nav = [[DzyNavigation alloc] initWithFrame:CGRectMake(0, 0, P_w, 64)];
    [self.view addSubview:nav];
    DzyNavModel *model = [[DzyNavModel alloc] init];
    model.color = UIColorFromHex(0x00A29A);
    model.centerBtn = @"我的粉丝";
    [nav setModel:model];
    
    WS(weakSelf)
    [nav setDzyLeft:^(UIButton *btn) {
        [weakSelf.navigationController popViewControllerAnimated:YES];
    }];