UIImage - 在 Swift 中调整大小和裁剪
Swift 中的简单类扩展，只需两个函数即可调整大小和裁剪 UIImages。
用法
将文件添加到您的项目中，您就准备好了！
例子
// Resizes an image to 100x100 pixels
let exampleImage = UIImage(named: "yourImageFile")
let resizedImage = exampleImage?.resizeToSize(CGSizeMake(100.0, 100.0))
if resizedImage != nil {
// Your image was resized
} else {
// Something went wrong
}
// Crops an image to 100x100 pixels, 150px from left and
