IOS Study Notes (5)-UI basics UIWindow and UIView

 

Self. window = [[[UIWindow alloc] initWithFrame: [[UIScreen mainScreen] bounds] autorelease]; // Override point for customization after application launch. self. window. backgroundColor = [UIColor whiteColor]; [self. window makeKeyAndVisible]; // displays the UIWindow

 

UIView:

 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{        self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];    // Override point for customization after application launch.    self.window.backgroundColor = [UIColor whiteColor];            CGRect rect=[UIScreen mainScreen].applicationFrame;        NSLog(@"NSScreen application %@",NSStringFromCGRect(rect));    CGRect rect2=[UIScreen mainScreen].bounds;        NSLog(@"NSString mainScreen %@",NSStringFromCGRect(rect2));    NSLog(@"iOS_didFinishLaunchingWithOptions");        UIView *view1=[[UIView alloc]initWithFrame:CGRectMake(60, 50, 200, 100)];    view1.backgroundColor=[UIColor greenColor];        [self.window addSubview:view1];    [view1 release];      UIView *view2=[[UIView alloc]initWithFrame:CGRectMake(60, 100, 200, 200) ];    view2.alpha=0.5;    view2.backgroundColor=[UIColor cyanColor];    [self.window addSubview:view2];               UIView *view3=[[UIView alloc]initWithFrame:CGRectMake(100, 50, 60, 50)];    view3.backgroundColor=[UIColor colorWithRed:25/255.0 green:60/255.0 blue:150/255.0 alpha:1.0];        [view2 addSubview:view3];        [view3 release];    [view2 release];        [self.window makeKeyAndVisible];    return YES;}

Three Views are added above. view1, view2, view3, and view3 are nested in view2.

 

 

 

* @ Author Zhang xingye * http://blog.csdn.net/xyz_lmn* iOS entry group: * android development advanced group: * my Sina Weibo: @ Zhang xingye TBOW*/