iOS开发中UITabBarController的使用示例
首先我们看一下它的view层级图：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
#pragma mark - 设置tabBarItem
#pragma mark 第一个视图ViewController
HMT_AViewController * tabBarViewA = [[HMT_AViewController alloc] init];
// 设置A视图下----标签栏标题文字(可参照微信或者QQ体会)
tabBarViewA.tabBarItem.title = @"微信";
// 设置A视图下----标签栏图片(因为自己没有图片,在这里随便设置了个名字)
//tabBarViewA.tabBarItem.image = [UIImage imageNamed:@"1.png"];
// 设置A视图下----标签栏信息提示(住:badgeValue是NSString类型 如下设置了3,就像QQ消息有3条未接受一样,给人一种提醒)
tabBarViewA.tabBarItem.badgeValue = @"3";
// ios7弃用了----标签栏选中的时候显示一张图片,没选中的时候显示另一张图片
//[tabBarViewA.tabBarItem setFinishedSelectedImage:actionMenu.selectedIcon withFinishedUnselectedImage:actionMenu.icon];
// ios7的方法(自己没有图片,所以代码里面的图片都是一个随便取的名字,没有实用意义)
//tabBarViewA.tabBarItem.selectedImage = actionMenu.selectedIcon;
#pragma mark 第二个视图ViewController
// 第二个视图ViewController
HMT_BViewController * tabBarViewB = [[HMT_BViewController alloc] init];
// 设置B视图下----标签栏
// 用系统提供的标识(可以算等价于图标和文字)进行设置(参数:UITabBarSystemItem是个枚举值,想要什么形式,就去系统提供的API中找)
tabBarViewB.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemSearch tag:1];
// 设置B视图下----标签栏信息提示
tabBarViewB.tabBarItem.badgeValue = @"GO";
#pragma mark 第三个视图ViewController
HMT_CViewController * tabBarViewC = [[HMT_CViewController alloc] init];
tabBarViewC.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemDownloads tag:2];
// 设置B视图下----标签栏信息提示
tabBarViewC.tabBarItem.badgeValue = @"new";
#pragma mark 第四个视图ViewController
HMT_DViewController * tabBarViewD = [[HMT_DViewController alloc] init];
tabBarViewD.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemFavorites tag:3];
// 设置B视图下----标签栏信息提示
tabBarViewD.tabBarItem.badgeValue = @"99";
#pragma mark 第五个视图ViewController
HMT_EViewController * tabBarViewE = [[HMT_EViewController alloc] init];
tabBarViewE.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemHistory tag:4];
// 设置B视图下----标签栏信息提示
tabBarViewE.tabBarItem.badgeValue = @"sky";
#pragma mark 第六个视图ViewController(系统默认能显示的最大视图个数是5个)
/* 如果你的viewControllers属性添加了多于五个的items，那tab bar controller将会自动插入一个特殊的view controller,
称为 More view controller,该 controller 将会负责管理多于的items,这个More view controller提供一个自定义的界面，
用table的方式呈现多余的view controller，并且view controller的数量是不限制的*/
HMT_FViewController * tabBarViewF = [[HMT_FViewController alloc] init];
tabBarViewF.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemContacts tag:5];
// 设置F视图下----标签栏信息提示
tabBarViewF.tabBarItem.badgeValue = @"AG";
#pragma mark - 设置TabBarController
// 创建TabBarController
UITabBarController * tabBarController = [[UITabBarController alloc]init];
// TabBarController默认是放在最底部的,如果你想调整位置,可以进行下面2部操作(44是iPhone中TabBarController和UINavigationController标准高度)
//CGRect frame = CGRectMake(0, 20, 320, 44);
//tabBarController.tabBar.frame = frame;
// 每一个tab都必须有一个content view controller------->viewControllers属性,用来存入一个应用的TabBarController有多少个界面切换
tabBarController.viewControllers = [NSArray arrayWithObjects:tabBarViewA,tabBarViewB,tabBarViewC,tabBarViewD,tabBarViewE,tabBarViewF, nil nil];
// 设置着色
tabBarController.tabBar.tintColor = [UIColor greenColor];
// 设置选中图片时候
tabBarController.tabBar.selectedImageTintColor = [UIColor brownColor];
// 设置背景图片(自己没有图片,不进行设置)
//tabBarController.tabBar.backgroundImage = [UIImage imageNamed:@"@@@@@"];
// 设置程序启动时默认的ViewController视图(设置为3,一共5个ViewController,进来时候显示的视图就是第4个-tabBarViewD,下标从0开始)
tabBarController.selectedIndex = 3;
self.window.rootViewController = tabBarController;
[self.window makeKeyAndVisible];
return YES;
}
最后效果如下图:
UITabBarController的代理方法以及模态显示
首先要实现协议<UITabBarControllerDelegate>
// 设置代理 tabBarController.delegate =self; //UINavigationController *nav = tabBarController.moreNavigationController; //[nav setNavigationBarHidden:YES animated:YES];// 控制哪些ViewController的标签栏能被点击 - (BOOL)tabBarController:(UITabBarController *)tabBarControllershouldSelectViewController:(UIViewController *)viewController{ // 代表HMT_CViewController这个View无法显示,无法点击到它代表的标签栏 if ([viewControllerisKindOfClass:[HMT_CViewControllerclass]]) { returnNO; } returnYES; }
// 选中哪个标签栏,一个监控作用吧 - (void)tabBarController:(UITabBarController *)tabBarControllerdidSelectViewController:(UIViewController *)viewController{
}
// More view controller将要开始编辑 - (void)tabBarController:(UITabBarController *)tabBarControllerwillBeginCustomizingViewControllers:(NSArray *)viewControllers{
} // More view controller将要结束编辑 - (void)tabBarController:(UITabBarController *)tabBarControllerwillEndCustomizingViewControllers:(NSArray *)viewControllers changed:(BOOL)changed{
} // More view controller编辑 - (void)tabBarController:(UITabBarController *)tabBarControllerdidEndCustomizingViewControllers:(NSArray *)viewControllers changed:(BOOL)changed{
}
#import "HMT-AViewController.h" #import "HMTModalShowViewController.h"
@interfaceHMT_AViewController () @end
@implementation HMT_AViewController
- (void)viewDidLoad { [superviewDidLoad]; self.view.backgroundColor = [UIColorredColor]; // 创建一个按钮 UIButton * button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; button.frame =CGRectMake(100,100,100, 100); [button addTarget:self action:@selector(modalShow)forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button]; // Do any additional setup after loading the view. }
- (void)modalShow{ HMTModalShowViewController * modalShowVC = [[HMTModalShowViewController alloc]init];
//模态视图控制器呈现出来时候的视觉效果 modalShowVC.modalTransitionStyle =UIModalTransitionStyleCrossDissolve; /* UIModalTransitionStyleCoverVertical = 0, //默认,由下往上 UIModalTransitionStyleFlipHorizontal, //水平转动效果 UIModalTransitionStyleCrossDissolve, //渐变效果 UIModalTransitionStylePartialCurl, //书页往上翻动效果 */ //模态视图控制器呈现方式,默认全屏 modalShowVC.modalPresentationStyle =UIModalPresentationFullScreen; /* UIModalPresentationFullScreen = 0, UIModalPresentationPageSheet, UIModalPresentationFormSheet, UIModalPresentationCurrentContext, UIModalPresentationCustom, UIModalPresentationNone = -1, */ UINavigationController * modalShowNC = [[UINavigationController alloc] initWithRootViewController:modalShowVC]; //推出模态视图控制器 [self presentViewController:modalShowNC animated:YES completion:^{ NSLog(@"hello world"); }]; }
#import "HMTModalShowViewController.h"
@interfaceHMTModalShowViewController ()
@end
@implementation HMTModalShowViewController
- (void)viewDidLoad { [superviewDidLoad]; // Do any additional setup after loading the view. self.view.backgroundColor = [UIColor yellowColor]; // 利用UINavigationController来实现退出控制器 UIBarButtonItem * barButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(modalDismiss)]; self.navigationItem.leftBarButtonItem = barButton; self.navigationItem.title =@"humingtao"; //创建一个按钮来实现退出控制器 /* UIButton * button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; button.frame = CGRectMake(100, 100, 100, 100); [button addTarget:self action:@selector(modalDismiss) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button];*/ }
- (void)modalDismiss{ //退出模态视图控制器 [self dismissViewControllerAnimated:YES completion:^{ NSLog(@"退出GoodBye"); }]; } @end
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