第一章 UI实战开发 UIWindow UIView

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UI 即：用户界面   UIWindow的使用 用法

对UIWindow 进行初始化 IOS 程序的入口

-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

（self.window = [[UIWindow alloc] init ];//WithFrame:[UIScreen mainScreen].bounds];//创建window，让其充满屏幕

self.window.frame = [[UIScreen mainScreen]bounds];）（第一种方法）

self.window=[[UIWindow alloc]initWithFrame:[UIScreen mainScreen] .bounds];（第二种方发）

//[self.window makeKeyAndVisible];//让window成为主窗口且可视

self.window.backgroundColor = [UIColor redColor];//设置背景色

self.window.rootViewController = [[ViewController alloc] init];//设置根视图控制器

// Override point for customization after application launch.

return YES;

}

UIView 视图 （进入view 创建UIView）的入口

UIview的方法

- (void)viewDidLoad {

[super viewDidLoad];

UIview *view = [[UIView alloc] init];

view.frame = CGRectMake(10, 20, 100, 100);//相对于父视图的位置，注意坐标和尺寸的合理性，保证坐标加尺寸不会超出父视图范围

view.userInteractionEnabled = YES;//是否允许用户点击（默认YES）,如果设置成no，子视图不会覆盖父视图的点击事件

self.view.backgroundColor=[UIColor blackColor];

view.backgroundColor = [UIColor redColor];

[self.view addSubview:view];//将后面的视图添加到前面的视图之上

self.view.userInteractionEnabled = YES;//如果父视图不允许交互，那么子视图的事件也会被屏蔽

view.tag =1;//设置视图的标签

view.alpha = 1;//设置视图的透明度，0~1（从透明到不透明)

self.view.alpha = 1;//如果父视图透明，那么子视图也会看不见

view.hidden = YES;//设置视图是否隐藏（默认NO）

self.view.hidden = YES;//如果父视图被隐藏，那么子视图也会被隐藏

UIView *view3 = [self.view viewWithTag:1];//获取父视图中标签为1的视图

view3.backgroundColor = [UIColor greenColor];

UIView *view5 = [[UIView alloc] initWithFrame:CGRectMake(10, 30, 100, 200)];

view5.backgroundColor = [UIColor blackColor];

[self.view addSubview:view5];

[view5 removeFromSuperview];//将视图移除父视图

UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(20, 20, 200, 300)];

view1.backgroundColor = [UIColor greenColor];

[self.view addSubview:view1];

view1.alpha =1;

[view1 removeFromSuperview];

[self.view insertSubview:view1 atIndex:3];//将子视图添加到父视图的某个位置

[self.view insertSubview:view5 aboveSubview:view1];//将view5添加到父视图，且在view1之上

[self.view insertSubview:view1 belowSubview:view];//将view1添加到父视图，且在_view之下

[self.view exchangeSubviewAtIndex:3 withSubviewAtIndex:2];//交换两个位置的视图

[self.view bringSubviewToFront:view5];//将某个子视图移到父视图的最前方

[self.view sendSubviewToBack:view1];//将某个子视图移到父视图的最底层

// Do any additional setup after loading the view, typically from a nib.

}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

NSLog(@"被点击");（点击之后的运行）

}

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