简单实现自定义TabBar实现点击tabBarItem触发自定义事件

由于项目中的需求，所以要做自定义的tabBarController来实现点击tabBarItem实现分享和弹出自定义相机实现拍照，那么问题来了，系统自带的tabBarController只能实现页面的跳转，并且在点击tabBarItem时无法隐藏tabBar。那么只好自定义了，在网上查找了很多，发现都不符合自己的需求，所以就自己摸索出了一个，接下来上代码：

• 首先我们创建一个继承UITabBarController的类

-(void)viewDidLoad
{
    [super viewDidLoad];
    
    HomeVC *homeVC = [[HomeVC alloc] init];
 
    UINavigationController *nav1 = [[UINavigationController alloc] initWithRootViewController:homeVC];
 
    UserVC *userVC = [[UserVC alloc] init];
    
    UINavigationController *nav3 = [[UINavigationController alloc] initWithRootViewController:userVC]; CameraVC *cameraVC = [[CameraVC alloc] init]; //删除原来的tabbar CGRect rect = self.tabBar.frame; [self.tabBar removeFromSuperview]; //移除TabBarController自带的下部的条 //测试添加自己的视图 _myView = [[UIView alloc] init]; _myView.frame = rect; _myView.backgroundColor = [UIColor whiteColor]; [self.view addSubview:_myView]; //这里我只添加了三个controlelr，因为第四个item点击不出现视图，而是触发分享事件 self.viewControllers = @[nav1,cameraVC,nav3]; NSArray *norImgArr = @[@"home01",@"Camera01",@"urse01",@"share01"]; NSArray *selImgArr = @[@"home02",@"Camera02",@"urse02",@"share02"]; for (int i = 0; i < 4; i++) { _itemBtn = [UIButton buttonWithType:UIButtonTypeCustom]; float width = MainScreenBounds.size.width/4; _itemBtn.frame = CGRectMake(i*width+23, 0, 44, 44); [_itemBtn setBackgroundImage:[UIImage imageNamed:[norImgArr objectAtIndex:i]] forState:UIControlStateNormal]; [_itemBtn setBackgroundImage:[UIImage imageNamed:[selImgArr objectAtIndex:i]] forState:UIControlStateSelected]; _itemBtn.tag = i; [_itemBtn addTarget:self action:@selector(itemButtonClick:) forControlEvents:UIControlEventTouchUpInside]; [_myView addSubview:_itemBtn]; [self.btnArray addObject:_itemBtn]; } //设置第一个button为选中状态 ((UIButton *)[self.btnArray objectAtIndex:0]).selected = YES; } 

• 接下来是btn的点击事件

- (void)itemButtonClick:(UIButton *)btn
{
    self.selectedIndex = btn.tag;
    
    switch (btn.tag)
    {
        case 0: { } break; case 1: { NSLog(@"照相"); //这里是点击相机的时候隐藏tabbar出现自定义相机界面 _myView.hidden = YES; } break; case 2: { } break; case 3: { NSLog(@"分享"); [self shareButtonClick]; } break; default: break; } //点击其他button后第一个button改为非选中状态 ((UIButton *)[self.btnArray objectAtIndex:0]).selected = NO; if (btn != _itemBtn) { _itemBtn.selected = NO; _itemBtn = btn; } _itemBtn.selected = YES; }