图片拉伸

 办法1

// MARK: - 获得一个拉伸的图片
extension UIImage{
     func getTensileImage() -> UIImage{
        let leftCapWidthUnderView = self.size.width * 0.5;
        let topCapHeightUnderView = self.size.height * 0.5
        return self.stretchableImage(withLeftCapWidth: Int(leftCapWidthUnderView), topCapHeight: Int(topCapHeightUnderView))
    }
}

　　

使用

self.bgView.image = UIImage.init(named: model["bgView"] ?? "")?.getTensileImage()

办法2
/*

* Stretch 拉伸

* Tile 平铺

*/

        self.bgView.image = UIImage.init(named: model["bgView"] ?? "")?.resizableImage(withCapInsets: UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 40), resizingMode: UIImageResizingMode.stretch)

转自：https://blog.csdn.net/wc455287693/article/details/47294547