ios - addSubview 不显示 UIView

Question

我描述了[self.view addSubView:myView]; ,
但是，myView 不显示 self.view .

View Controller .h

@interface ViewController : UIViewController{
    UIView *myView;
}

@property (nonatomic, strong) UIView *myView;

View Controller .m

@synthesize myView;

- (void)viewDidLoad
{
    [super viewDidLoad];

    myView.frame = CGRectMake(-10, 70, 320, 480);
    [self.view addSubview:myView];
    myView.backgroundColor = [UIColor redColor];
    [self.view bringSubviewToFront:myView];
}

你有什么解决办法？

Answer 1

您需要先分配 View :

- (void)viewDidLoad
{
    [super viewDidLoad];

    // If you use custom view change UIView to the custom class name
    myView = [[UIView alloc] initWithFrame:CGRectMake(-10, 70, 320, 480)];

    [self.view addSubview:myView];
    myView.backgroundColor = [UIColor redColor];
    [self.view bringSubviewToFront:myView];
}