ios - 这里的最后一行代码有什么问题？

Question

我试图在 viewDidLoad 方法中设置视图层次结构，但最后一行出现问题。

UIView *catView = [[UIView alloc] init];


UIImage *image = [UIImage imageNamed:@"lolcat.png"];
UIImageView *imageView = [[UIImageView alloc]initWithImage:image];
[self.view addSubview:imageView];

Answer 1

看起来你想改变

[self.view addSubview:imageView];

至

[catView addSubview:imageView];

请参阅https://teamtreehouse.com/forum/programming-a-background-stuck-on-code-challenge