iOS 实现Tabbarcontroller中间自定义样式 最简单的方法

先上图：

如果我们要实现中间按钮自定义样式，方法应该蛮多，这里介绍一种最简单的。

1、创建类继承：UITabBarController，如下代码都是写在该类的 .m文件里

2、定义最中间的自定义样式，写在viewDidLoad里

    UIButton *btn = [[UIButton alloc] init];
    btn.layer.cornerRadius = 30;
    btn.layer.masksToBounds = YES;
    btn.backgroundColor = [UIColor redColor];
    btn.frame = CGRectMake(0, 0, 60, 60);
    CGPoint center = self.tabBar.center;
    center.y=center.y-15;
    btn.center = center;
    [self.view addSubview:btn];
    [btn addTarget:self action:@selector(hhhCLick) forControlEvents:UIControlEventTouchUpInside];

这里解释一下：

我们获取当前tabbar的center点，然后自定义一个按钮，给予自己想要的样式，然后add上去。

这里要注意一点，这里用的自定义按钮，没有用系统tabbarItem，所以最后setViewController的时候要留出位置。

完整代码如下：

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    HomeViewController *home = [[HomeViewController alloc] init];
    UINavigationController *homeNav = [[UINavigationController alloc] initWithRootViewController:home];
    home.title = @"相册";
    home.navigationItem.title = @"相册";
    home.tabBarItem.image = [[UIImage imageNamed:@"home"] imageWithRenderingMode:UIImageRenderingModeAutomatic];
    home.tabBarItem.selectedImage = [[UIImage imageNamed:@"home_selected"] imageWithRenderingMode:UIImageRenderingModeAutomatic];

    VideoViewController *pic = [[VideoViewController alloc] init];
    UINavigationController *picNav = [[UINavigationController alloc] initWithRootViewController:pic];
    pic.title = @"视频";
    pic.navigationItem.title = @"视频";
    pic.tabBarItem.image = [[UIImage imageNamed:@"picture"] imageWithRenderingMode:UIImageRenderingModeAutomatic];
    pic.tabBarItem.selectedImage = [[UIImage imageNamed:@"picture_selected"] imageWithRenderingMode:UIImageRenderingModeAutomatic];

    SeetingViewController *setting = [[SeetingViewController alloc] init];
    UINavigationController *setNav = [[UINavigationController alloc] initWithRootViewController:setting];
    setting.tabBarItem.title = @"设置";
    setting.navigationItem.title = @"设置";
    setting.tabBarItem.image = [[UIImage imageNamed:@"setting"] imageWithRenderingMode:UIImageRenderingModeAutomatic];
    setting.tabBarItem.selectedImage = [[UIImage imageNamed:@"setting_selected"] imageWithRenderingMode:UIImageRenderingModeAutomatic];

    SeetingViewController *setting222 = [[SeetingViewController alloc] init];
    UINavigationController *setNav222 = [[UINavigationController alloc] initWithRootViewController:setting222];
    setting222.tabBarItem.title = @"设置2";
    setting222.navigationItem.title = @"设置2";
    setting222.tabBarItem.image = [[UIImage imageNamed:@"setting"] imageWithRenderingMode:UIImageRenderingModeAutomatic];
    setting222.tabBarItem.selectedImage = [[UIImage imageNamed:@"setting_selected"] imageWithRenderingMode:UIImageRenderingModeAutomatic];

    NSMutableArray *arry = [[NSMutableArray alloc] init];
    [arry addObject:homeNav];
    [arry addObject:picNav];
    [arry addObject:[UIViewController new]];
    [arry addObject:setNav222];
    [arry addObject:setNav];
    [self setViewControllers:arry animated:YES];

    //－－－－－－－－－－－这里是自定义样式按钮－－－－－－－－－－－
    UIButton *btn = [[UIButton alloc] init];
    btn.layer.cornerRadius = 30;
    btn.layer.masksToBounds = YES;
    btn.backgroundColor = [UIColor redColor];
    btn.frame = CGRectMake(0, 0, 60, 60);
    CGPoint center = self.tabBar.center;
    center.y=center.y-15;
    btn.center = center;
    [self.view addSubview:btn];
    [btn addTarget:self action:@selector(hhhCLick) forControlEvents:UIControlEventTouchUpInside];

}

点击按钮事件，自己可以Modal到新控制器。

-(void)hhhCLick{

    SeetingViewController *setting111 = [[SeetingViewController alloc] init];
    UINavigationController *setNav111 = [[UINavigationController alloc] initWithRootViewController:setting111];
    setting111.tabBarItem.title = @"";
    setting111.navigationItem.title = @"设置1";

    [self presentViewController:setNav111 animated:YES completion:nil];

}