@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
[self loadViewController];
return YES;
}
//加载视图控制器
- (void)loadViewController {
MyTabBarController *tabVC = [[MyTabBarController alloc] init];
//设置选中时显示的文字的颜色(前景色)
tabVC.tabBar.tintColor= [UIColor orangeColor];
//设置代理可以调用返回值为BOOL的方法
tabVC.delegate = self;
//首页
//imageWithRenderingMode图片渲染模式
//UIImageRenderingModeAlwaysOriginal不使用tintColor进行渲染
ViewController *hvc = [[ViewController alloc] init];
UIImage *hImg1 = [[UIImage imageNamed:@"tabbar_home"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UIImage *hImg2 = [[UIImage imageNamed:@"tabbar_home_selected"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
hvc.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"首页" image:hImg1 selectedImage:hImg2];
//发现
FindViewController *fvc = [[FindViewController alloc]init];
UIImage *fImg1 = [[UIImage imageNamed:@"tabbar_discover"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UIImage *fImg2 = [[UIImage imageNamed:@"tabbar_discover_selected"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
fvc.tabBarItem= [[UITabBarItem alloc] initWithTitle:@"发现" image:fImg1 selectedImage:fImg2];
//发布(占位VC)
UIViewController *vc = [[UIViewController alloc] init];
vc.view.backgroundColor= [UIColor purpleColor];
//数组中元素按照显示的顺序进行放置
tabVC.viewControllers= @[hvc,vc,fvc];
//设置根视图控制器否则运行时系统会崩溃
self.window.rootViewController = tabVC;
}
#pragma mark --- UITabBarControllerDelegate
- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {
//对于自定义的tabBar,要对这个方法进行调用时,不仅需要导入代理,设置,还需要对触发这个方法的按钮进行注册，不然不会触发该方法
//接收按钮视图
//UIControl *control = obj;
//注册绑定事件
//[control sendActionsForControlEvents:UIControlEventTouchUpInside];
//设置占位VC的视图控制器 012
if([tabBarController.viewControllers indexOfObject: viewController] == 1) {
AnimationVC *avc = [[AnimationVC alloc]init];
//模态弹出样式
avc.modalPresentationStyle = UIModalPresentationCurrentContext;
//视图模态出现
[tabBarController presentViewController:avcanimated:YES completion:nil];
//使占位页面不出现
return NO;
}
//使点击事件可以触发
return YES;
}
@implementation MyTabBarController
- (void)viewDidLoad {
[super viewDidLoad];
//使用自定义tabBar
//self.tabBar
//KVC键值编码这里的key不能出错key valve coding
[self setValue:[CustomTabBarnew] forKey:@"tabBar"];
}
@implementation CustomTabBar
- (id)initWithFrame:(CGRect)frame {
self= [super initWithFrame:frame];
if(self) {
//添加到tabBar使用get方法创建，所以这里要set打点调用
[self addSubview:self.btn];
}
return self;
}
//重新布局子视图
- (void)layoutSubviews {
[supe rlayoutSubviews];
//让btn显示到最上面
[self bringSubviewToFront:_btn];
}
- (UIButton *)btn {
if(!_btn) {
_btn = [UIButton buttonWithType:UIButtonTypeCustom];
_btn.frame= CGRectMake((WIDTH- 50) / 2.0, 2, 50, 40);
//背景图片
[_btn setBackgroundImage:[UIImage imageNamed:@"tabbar_compose_button"] forState:UIControlStateNormal];
[_btns etBackgroundImage:[UIImage imageNamed:@"tabbar_compose_button_highlighted"] forState:UIControlStateHighlighted];
//加号图片
[_btn setImage:[UIImage imageNamed:@"tabbar_compose_icon_add"] forState:UIControlStateNormal];
[_btn setImage:[UIImage imageNamed:@"tabbar_compose_icon_add_highlighted"] forState:UIControlStateHighlighted];
[_btn addTarget:selfaction:@selector(Click:) forControlEvents:UIControlEventTouchUpInside];
}
return _btn;
}
- (void)Click:(UIButton *)sender {
//在本视图共有6层视图(012345)遍历所有子视图找到按钮视图
[self.subviews enumerateObjectsUsingBlock:^(__kindofUIView *_Nonnullobj,NSUIntegeridx,BOOL*_Nonnullstop) {
//找到加号按钮
if(idx == 2) {
//接收按钮视图
UIControl *control = obj;
//注册绑定事件
[control sendActionsForControlEvents:UIControlEventTouchUpInside];
}
}];
}
