Swift UIImage全屏

Question

我有這樣的UIImage：

let imageView = UIImageView(image: image!)

imageView.contentMode = .scaleToFill

self.view.addSubview(imageView)

我想做的是使圖像全屏顯示，我嘗試過scaleToFill，scaleAspectFit和scaleAspectFill兩者都不做……我在做什么錯？

這是我的完整代碼：

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

您必須將UIImageView框架設置為要填充的區域的大小。 您可以通過顯式設置框架或使用自動布局（推薦）來做到這一點。

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

您要操縱UIImageView的框架，而不是contentMode。

嘗試這個：

let imageView = UIImageView(image: image!)

imageView.frame = self.view.frame
imageView.contentMode = .scaleToFill

self.view.addSubview(imageView)