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为什么addSubview不显示？

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我想以编程方式将 myView 添加到父视图 . 但它没有错误的代码吗？

@interface ViewController ()
@property (nonatomic,weak) UIView *myView;
@end

@implementation ViewController
@synthesize myView = _myView;

- (void)viewDidLoad
{
    [super viewDidLoad];
    CGRect viewRect = CGRectMake(10, 10, 100, 100);
    self.myView = [[UIView alloc] initWithFrame:viewRect];
    self.myView.backgroundColor = [UIColor redColor];
    [self.view addSubview:self.myView];
}
objective-c ios

2 回答

  • 7

    更换

    @property (nonatomic,weak) UIView *myView;

    同

    @property (strong, nonatomic) UIView *myView;

    它应该工作:)

    回复于
  • 2
    @interface ViewController ()

@end

@implementation ViewController

UIView *myView;

-(void)viewDidLoad
{
    [super viewDidLoad];

    CGRect viewRect = CGRectMake(10, 10, 100, 100);

    myView = [[UIView alloc] initWithFrame:viewRect];

    myView.backgroundColor = [UIColor redColor];

    [self.view addSubview:myView];
}

    试试这个会起作用......

    回复于

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