UIImageView自动调整程序大小

Question

我试图在UIViewController的底部对齐imageView，但在iPhone 5模拟器上它没有在底部对齐。

我试着把imageView放在storyboard的底部，它是正确对齐的，所以我想我的代码中遗漏了什么。

任何建议吗?

谢谢,e .

imageView=[[UIImageView alloc] initWithFrame:CGRectMake(0, 416, 320, 64)];
[imageView setContentMode:UIViewContentModeScaleToFill];
imageView.autoresizingMask=UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleTopMargin;
[self.view addSubview:imageView];

Answer 1

懂了，用了

[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[xmlView]|"
                                                                  options:0
                                                                  metrics:0 views:NSDictionaryOfVariableBindings(xmlView)]];

Answer 2

像这样设置帧大小:

UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(self.view.frame.origin.x, self.view.frame.size.height-64, 320, 64)];
[imageView setContentMode:UIViewContentModeScaleToFill];
[self.view addSubview:imageView];