Swift UIImage全宽屏幕

Question

我有这样的UIImage：

let imageView = UIImageView(image: image!)
imageView.contentMode = .scaleToFill
self.view.addSubview(imageView)

我正在尝试做的是使图像成为屏幕的全宽，我已经尝试了scaleToFill，scaleAspectFit和scaleAspectFill它们都没有做任何事情......我做错了什么？

这是我的完整代码：

getLandGradingImage(image: imageData!) { result in
let image = UIImage(data: result)
if image != nil {
let imageView = UIImageView(image: image!)
imageView.contentMode = .scaleAspectFit
//Add Image to view
self.view.addSubview(imageView)
} else {
self.customAlert(title: "Error", message: "Unable to get images")
}
}

Answer 1

let imageView = UIImageView(image: image!)
imageView.contentMode = .scaleAspectFill
imageView.frame = self.view.bounds
imageView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
self.view.addSubview(imageView)

Answer 2

你必须使你的UIImageView框成为你想要填充的区域的大小。 您可以通过显式设置框架或使用自动布局(推荐(来执行此操作。

方法1：

let imageView = UIImageView(image: image!)
imageView.frame = self.view.frame;
imageView.contentMode = .scaleAspectFit
//Add Image to view
self.view.addSubview(imageView)

方法2：

let imageView = UIImageView(image: image!)
imageView.contentMode = .scaleAspectFit
//Add Image to view
self.view.addSubview(imageView)
self.view.translatesAutoresizingMaskIntoConstraints = false  
self.view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[subview]-0-|", options: .directionLeadingToTrailing, metrics: nil, views: ["subview": imageView]))
self.view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-0-[subview]-0-|", options: .directionLeadingToTrailing, metrics: nil, views: ["subview": imageView]))

Answer 3

你想操作UIImageView的框架而不是内容模式。

试试这个：

let imageView = UIImageView(image: image!)
imageView.frame = self.view.frame
imageView.contentMode = .scaleToFill
self.view.addSubview(imageView)