关于ios：addSubview不起作用

addSubview doesn't work

我是Objective-C的初学者。当我在方法设置视图中使用AddSubView查看图像时，这不起作用。

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h.

@interface CollectionViewController : UICollectionViewController

@end

@interface MyCell : UICollectionViewCell

@end

和

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m.

@interface MyCell ()

@end

@implementation MyCell

- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) [self setupView];
return self;

}

- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self) [self setupView];
return self;
}

-(UIImageView *)myImageView {

UIImageView *imageView = [UIImageView new];
imageView.image = [UIImage imageNamed:@"photo.jpg"];
imageView.contentMode = UIViewContentModeScaleAspectFill;
imageView.layer.masksToBounds = true;
return imageView;

}

-(void)setupView {

self.backgroundColor = [UIColor whiteColor];

[self addSubview:self.myImageView];

}

@end

enter image description here