UI初级第六课 Tab 控制器（标签控制器）——iOS学习连载21

本文详细介绍了如何自定义iOS与Android应用的Tab Bar界面，包括定义Tab Bar Item、设置背景颜色、选中图片颜色、隐藏Tab Bar View等操作，并提供了创建选中视图、设置标签栏按钮等功能。

1. 使用自定义方式定义tabbarItem
    UITabBarItem *item1 = [[UITabBarItemalloc]initWithTabBarSystemItem:UITabBarSystemItemFavoritestag:1];
    item1.badgeValue= @"item1";
    homeVC.tabBarItem= item1;

    UITabBarItem *item2 = [[UITabBarItemalloc]initWithTabBarSystemItem:UITabBarSystemItemBookmarkstag:2];
    item2.badgeValue= @"haha";

messageVC.tabBarItem = item2;

2.设置tabbar的背景颜色

tabCtrl.tabBar.barTintColor = [UIColor cyanColor];

3.设置选中图片的颜色

tabCtrl.tabBar.tintColor= [UIColorcyanColor];

4.设置选中item后，显示在此item下面的图片

tabCtrl.tabBar.selectionIndicatorImage = [UIImageimageNamed:@"选中.png"];

5.隐藏自己的tabbarView

self.tabBar.hidden = true;

6.创建选中视图
UIImageView *selectedView = [[UIImageViewalloc]initWithFrame:CGRectMake(0,0,53,45)];
selectedView.tag= 100;

selectedView.image = [UIImageimageNamed:@"选中.png"];

7.创建标签栏的5个按钮

   for(inti = 0; i < 5; i++) {
        UIButton *btn = [UIButtonbuttonWithType:UIButtonTypeCustom];
        btn.tag= 200 + i;
        btn.frame= CGRectMake(scrrenWidth /5 * i, 0, scrrenWidth / 5, 49);
        [btn addTarget:selfaction:@selector(btnClick:)forControlEvents:UIControlEventTouchUpInside];
        NSString *imgName = [NSStringstringWithFormat:@"%d.png", i + 1];
        [btn setImage:[UIImageimageNamed:imgName]forState:UIControlStateNormal];

[_tabbarViewaddSubview:btn];

//设置选中图片中心与btn图片中心相同

       if (i == 0) {
            selectedView.center= btn.center;
        }

}

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

    //设置选择的控制器
    self.selectedIndex= btn.tag- 200;

    UIView *selectedView = [_tabbarViewviewWithTag:100];


    [UIViewanimateWithDuration:0.3
                     animations:^{
                         selectedView.center= btn.center;

}];

}

8.- (void)_initViewControllers

{

   //三级控制器
    HomeViewController *homeVC = [[HomeViewControlleralloc]init];
    MessageViewController *messageVC = [[MessageViewControlleralloc]init];
    SearchViewController *searchVC = [[SearchViewControlleralloc]init];
    SettingViewController *settingVC = [[SettingViewControlleralloc]init];
    MoreViewController *moreVC = [[MoreViewControlleralloc]init];

    NSArray *viewControllers =@[homeVC, messageVC, searchVC, settingVC, moreVC];

    NSMutableArray *navs = [NSMutableArrayarray];
    //二级控制器
    for (inti = 0; i < viewControllers.count; i ++) {
        UINavigationController *nav = [[UINavigationControlleralloc]initWithRootViewController:viewControllers[i]];
        nav.delegate= self;
        [navs addObject:nav];
    }

    //一级控制器
    self.viewControllers= navs;

}