iOS的UI开发中UITabBarControlle的基本使用教程

#import "YYAppDelegate.h"

@implementation YYAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //1.创建Window
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
   
    //a.初始化一个tabBar控制器
    UITabBarController *tb=[[UITabBarController alloc]init];
    //设置控制器为Window的根控制器
    self.window.rootViewController=tb;
   
    //b.创建子控制器
    UIViewController *c1=[[UIViewController alloc]init];
    c1.view.backgroundColor=[UIColor grayColor];
    c1.view.backgroundColor=[UIColor greenColor];
    c1.tabBarItem.title=@"消息";
    c1.tabBarItem.image=[UIImage imageNamed:@"tab_recent_nor"];
    c1.tabBarItem.badgeValue=@"123";
   
    UIViewController *c2=[[UIViewController alloc]init];
    c2.view.backgroundColor=[UIColor brownColor];
    c2.tabBarItem.title=@"联系人";
    c2.tabBarItem.image=[UIImage imageNamed:@"tab_buddy_nor"];
   
    UIViewController *c3=[[UIViewController alloc]init];
    c3.tabBarItem.title=@"动态";
    c3.tabBarItem.image=[UIImage imageNamed:@"tab_qworld_nor"];
    
    UIViewController *c4=[[UIViewController alloc]init];
    c4.tabBarItem.title=@"设置";
    c4.tabBarItem.image=[UIImage imageNamed:@"tab_me_nor"];
  
   
    //c.添加子控制器到ITabBarController中
    //c.1第一种方式
//    [tb addChildViewController:c1];
//    [tb addChildViewController:c2];
   
    //c.2第二种方式
    tb.viewControllers=@[c1,c2,c3,c4];
   
   
    //2.设置Window为主窗口并显示出来
    [self.window makeKeyAndVisible];
    return YES;
}

@end

#import "YYbaseViewController.h"

@interface YYbaseViewController ()

@end

// 当控制器的view加载完毕就调用
- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"%@ -  控制器的view加载完毕", [self class]);
}

// 控制器即将显示的时候调用
- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:YES];
    NSLog(@"%@ -  控制器即将显示", [self class]);
}

// 控制器完全显示的时候调用
- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    NSLog(@"%@ -  控制器完全显示", [self class]);
}

// 控制器即将消失的时候调用
- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    NSLog(@"%@ -  控制器即将消失", [self class]);
}
// 控制器完全消失的时候调用
- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
    NSLog(@"%@ -  控制器完全消失", [self class]);
}

- (void)viewWillUnload
{
    [super viewWillUnload];
    NSLog(@"%@ -  view即将被销毁", [self class]);
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    NSLog(@"%@ -  view完全被销毁", [self class]);
}

- (void)dealloc
{
    NSLog(@"%@",  [self class]);
}

@end