UIWindow

/UIWindow : UIView

@interface ViewController ()

@property(strong,nonatomic)UIWindow *window;

@property(strong,nonatomic)UIButton *buttonShow;

@property(strong,nonatomic)UIButton *buttonHide;

@end

//window应用场景:不基于任何父视图,独立显示,window上可以贴子视图,一般用于制作悬浮窗

//你自定义的window不要在系统创建window之前

@implementation ViewController

- (void)viewDidLoad {

    [superviewDidLoad];

    

    self.buttonShow = [UIButtonbuttonWithType:UIButtonTypeCustom];

    self.buttonShow.frame =CGRectMake(10,20, 100,30);

    self.buttonShow.backgroundColor = [UIColorredColor];

    //Button设置文本只能通过调用方法

    [self.buttonShowsetTitle:@"显示悬浮窗"forState:UIControlStateNormal];

    //设置按钮字体大写

    self.buttonShow.titleLabel.font = [UIFont systemFontOfSize:15];

    [self.buttonShowaddTarget:selfaction:@selector(tapButtonShow)forControlEvents:UIControlEventTouchUpInside];

    [self.viewaddSubview:self.buttonShow];

    

   

    

    self.buttonHide = [UIButtonbuttonWithType:UIButtonTypeCustom];

    self.buttonHide.frame =CGRectMake(150,20, 100,30);

    self.buttonHide.backgroundColor = [UIColorredColor];

    //Button设置文本只能通过调用方法

    [self.buttonHidesetTitle:@"隐藏悬浮窗"forState:UIControlStateNormal];

    //设置按钮字体大写

    self.buttonHide.titleLabel.font = [UIFont systemFontOfSize:15];

    [self.buttonHideaddTarget:selfaction:@selector(tapButtonHide)forControlEvents:UIControlEventTouchUpInside];

    [self.viewaddSubview:self.buttonHide];

    

    

    self.window  =[[UIWindowalloc]initWithFrame:CGRectMake(250,250, 80,80)];

    self.window.backgroundColor = [UIColorlightGrayColor];

    //设置window的显示层级,UIWindowLevelAlert显示在最前面,

    self.window.windowLevel =UIWindowLevelAlert;

    self.window.layer.cornerRadius = 40;

    

    //自定义的window需要在系统的window之后

   // [self.window makeKeyAndVisible];

    

    

   //练习:window上可以贴子视图

    

    

    

}

- (void)tapButtonShow

{

    //显示window

    NSLog(@"hidden = %d",self.window.hidden);

    //makeKeyAndVisible显示window,优先级比hidden高

    [self.windowmakeKeyAndVisible];

}

- (void)tapButtonHide

{

    self.window.hidden =YES;

}