常规项目基本上都是一个TabBarController,下面有三四个模块，每个模块都是一个NavigationController。别致一点的会在tabBar中间自定义一个样式，如 “ + ” 号等。
系统的UITabBarController自然是可以，但还是不尽如人意。所以项目中多是下面两个第三方TabBarController.
CYLTabBarController
#import "HomeViewController.h"
#import "FirstViewController.h"
#import "SecondViewController.h"
#import "WPNavigationController.h"
@interface HomeViewController ()
@end
@implementation HomeViewController
//初始化
- (instancetype)init{
self = [super init];
if (self) {
//设置控制器
[self setupTabBarController];
//设置tabBar 高度
self.tabBarHeight = 60;
self.tabBarController.tabBar.delegate = self;
self.moreNavigationController.navigationBarHidden = NO;
}
return self;
}
//设置子视图
- (void)setupTabBarController{
FirstViewController *firstVC = [[FirstViewController alloc]init];
firstVC.view.backgroundColor = [UIColor whiteColor];
WPNavigationController *firstNav = [[WPNavigationController alloc]initWithRootViewController:firstVC];
SecondViewController *secondVC = [[SecondViewController alloc]init];
secondVC.view.backgroundColor = [UIColor greenColor];
WPNavigationController *secondNav = [[WPNavigationController alloc]initWithRootViewController:secondVC];
NSDictionary *dic1 = @{
CYLTabBarItemTitle:@"首页",
CYLTabBarItemImage:@"home_unselected",
CYLTabBarItemSelectedImage:@"home_selected",
};
NSDictionary *dic2 = @{
CYLTabBarItemTitle:@"我的",
CYLTabBarItemImage:@"me_unselected",
CYLTabBarItemSelectedImage:@"me_selected",
};
self.tabBarItemsAttributes = @[dic1,dic2];
//最后一步设置viewControllers
[self setViewControllers:@[firstNav,secondNav]];
//详细设置tabBar的样式
[self customizeTabBarAppearance:self];
}
/**
* 可以详细设置tabBar的样式内容
*/
- (void)customizeTabBarAppearance:(CYLTabBarController *)tabBarController {
// 普通状态下的文字属性
NSMutableDictionary *normalAttrs = [NSMutableDictionary dictionary];
normalAttrs[NSForegroundColorAttributeName] = HEXCOLOR(0x2c2c2c);
// 选中状态下的文字属性
NSMutableDictionary *selectedAttrs = [NSMutableDictionary dictionary];
selectedAttrs[NSForegroundColorAttributeName] = HEXCOLOR(0xd81e06);
// 设置文字属性
UITabBarItem *tabBarItem = [UITabBarItem appearance];
[tabBarItem setTitleTextAttributes:normalAttrs forState:UIControlStateNormal];
[tabBarItem setTitleTextAttributes:selectedAttrs forState:UIControlStateSelected];
// 设置背景图片
UITabBar *tabBar = [UITabBar appearance];
[tabBar setBarStyle:UIBarStyleDefault]; //设置tabBar样式
[tabBar setBarTintColor:[UIColor whiteColor]];//设置tabBar背景色
// 去除 TabBar 自带的顶部阴影
[tabBar setShadowImage:[[UIImage alloc] init]];
}
#pragma mark - Delegate Method
#pragma mark - UITabBarControllerDelegate Method
- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item{
if ([item.title isEqualToString:@"我的"]) {
NSLog(@"点击了我的");
}
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
CYLTabBarController 的父类是UITabBarController,所以可以正常使用父类的所有属性和方法，另外，它最牛X的地方在于自定义特殊tabBarItem时的低耦合性。
只要在工程中新建一个继承自CYLPlusButton 的类，并实现相应的代理方法，会自动检测生成。
#import "CYLPlusButtonSubclass.h"
#import "CYLTabBarController.h"
@interface CYLPlusButtonSubclass ()< CYLPlusButtonSubclassing >
{
CGFloat _buttonImageHeight;
}
@end
@implementation CYLPlusButtonSubclass
#pragma mark - 注册
+ (void)load {
[super registerPlusButton];
}
#pragma mark - 初始化
- (instancetype)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
self.titleLabel.textAlignment = NSTextAlignmentCenter;
self.adjustsImageWhenHighlighted = NO;
}
return self;
}
#pragma mark上下结构的 button
- (void)layoutSubviews {//initWithFrame时会触发
[super layoutSubviews];
// 控件大小,间距大小.
//设置图片大小 Width = Height
CGFloat const imageViewEdgeWidth = self.bounds.size.width * 0.6;
CGFloat const imageViewEdgeHeight = imageViewEdgeWidth ;
CGFloat const centerOfView = self.bounds.size.width * 0.5; //X轴中心点
CGFloat const labelLineHeight = self.titleLabel.font.lineHeight; //行高
// imageView 和 titleLabel 中心的 Y 值
CGFloat const centerOfImageView = imageViewEdgeWidth * 0.5;
CGFloat const centerOfTitleLabel = imageViewEdgeHeight + labelLineHeight * 0.5 + 5 ;
//imageView position 位置
self.imageView.bounds = CGRectMake(0, 0, imageViewEdgeWidth, imageViewEdgeHeight);
self.imageView.center = CGPointMake(centerOfView, centerOfImageView);
//title position 位置
self.titleLabel.bounds = CGRectMake(0, 0, self.bounds.size.width, labelLineHeight);
self.titleLabel.center = CGPointMake(centerOfView, centerOfTitleLabel);
}
#pragma mark - CYLPlusButtonSubclassing Methods
//奇数时可以不用实现
+ (NSUInteger)indexOfPlusButtonInTabBar {
return 1;
}
/**
* 带标题
*/
+ (id)plusButton {
CYLPlusButtonSubclass *button = [[CYLPlusButtonSubclass alloc] init];
UIImage *buttonImage_unSelected = [UIImage imageNamed:@"center_unselected"];
UIImage *buttonImage_selected = [UIImage imageNamed:@"center"];
[button setImage:buttonImage_selected forState:UIControlStateSelected];
[button setImage:buttonImage_unSelected forState:UIControlStateNormal];
[button setTitle:@"思考" forState:UIControlStateNormal];
[button setTitleColor:HEXCOLOR(0x2c2c2c) forState:UIControlStateNormal];
[button setTitleColor:HEXCOLOR(0xd81e06) forState:UIControlStateSelected];
button.titleLabel.font = [UIFont systemFontOfSize:11];
[button sizeToFit];
//[button addTarget:button action:@selector(clickPublisha) forControlEvents:UIControlEventTouchUpInside];
return button;
}
/**
* 两个可选的代理方法都在设置button的中心点Y轴方向上的位置
* PlusButtonCenterY = multiplierOfTabBarHeight * taBarHeight + constantOfPlusButtonCenterYOffset;
*/
/**
* 返回值大于0.5表示偏下
* 返回值小于0.5表示偏上
* 在图片大小超出tabBar高度时实现这个方法，可以精细控制
*/
+ (CGFloat)multiplierOfTabBarHeight:(CGFloat)tabBarHeight {
return 0.6;
}
/**
* 返回值大于0会向下偏移
* 返回值小于0会向上偏移
*/
+ (CGFloat)constantOfPlusButtonCenterYOffsetForTabBarHeight:(CGFloat)tabBarHeight {
return -20;
}
/*
* 不带标题
*/
//+ (id)plusButton
//{
//
// UIImage *buttonImage = [UIImage imageNamed:@"hood.png"];
// UIImage *highlightImage = [UIImage imageNamed:@"hood-selected.png"];
//
// CYLPlusButtonSubclass* button = [CYLPlusButtonSubclass buttonWithType:UIButtonTypeCustom];
//
// button.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleTopMargin;
// button.frame = CGRectMake(0.0, 0.0, buttonImage.size.width, buttonImage.size.height);
// [button setBackgroundImage:buttonImage forState:UIControlStateNormal];
// [button setBackgroundImage:highlightImage forState:UIControlStateHighlighted];
// [button addTarget:button action:@selector(clickPublish) forControlEvents:UIControlEventTouchUpInside];
//
// return button;
//}
实现下面这个方法后，自定义的item 会跟其它item一样点击后进入新的VC,如果不实现相当于一个特殊的button,并且一定要实现indexOfPlusButtonInTabBar。
+ (UIViewController *)plusChildViewController {
UIViewController *plusChildViewController = [[UIViewController alloc] init];
plusChildViewController.view.backgroundColor = [UIColor redColor];
plusChildViewController.navigationItem.title = @"PlusChildViewController";
UIViewController *plusChildNavigationController = [[UINavigationController alloc]
initWithRootViewController:plusChildViewController];
return plusChildNavigationController;
}
- (void)clickPublisha{
NSLog(@"gggg");
}
RDVTabBarController
RDVTabBarController 的父类是UIViewController，所以无法直接使用UITabBarController的方法，图标也无法很方便的自定义。
@interface MainTabViewController()
@end
@implementation SMTMainTabViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.delegate = self;
[self setUpControllers];
}
-(void)setUpControllers
{
FirstViewController *firstVC = [[FirstViewController alloc]init];
firstVC.view.backgroundColor = [UIColor whiteColor];
WPNavigationController *firstNav = [[WPNavigationController alloc]initWithRootViewController:firstVC];
SecondViewController *secondVC = [[SecondViewController alloc]init];
secondVC.view.backgroundColor = [UIColor greenColor];
WPNavigationController *secondNav = [[WPNavigationController alloc]initWithRootViewController:secondVC];
[self setViewControllers:@[firstNav, secondNav]];
//定制tabbar
[self customizeTabBar];
}
- (void)customizeTabBar
{
UIImage *imgSelected = nil;
UIImage *imgUnselected = nil;
NSString*title = @"";
NSInteger index = 0;
for (RDVTabBarItem *item in [[self tabBar] items]){
if (index == 0){
imgSelected = [UIImage imageNamed:@"首页"];
imgUnselected = [UIImage imageNamed:@"un首页"];
title = @"首页";
} else if(index == 1){
imgSelected = [UIImage imageNamed:@"我的"];
imgUnselected = [UIImage imageNamed:@"un我的"];
title = @"我的";
}
item.title = title;
//调整item 图标和标题的位置，使之平排
//item.titlePositionAdjustment = UIOffsetMake(20, -11);
//item.imagePositionAdjustment = UIOffsetMake(0, 3);
[item setFinishedSelectedImage:imgSelected withFinishedUnselectedImage:imgUnselected];
index++;
}
}
#pragma mark - RDVTabBarControllerDelegate Methods
- (BOOL)tabBarController:(RDVTabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController｛
return YES;
｝
PS:VC中要得到RDVTabBarController :
self.rdv_tabBarItem;
self.rdv_tabBarController