在Swift中使用renderingMode创建UIImage

Question

在objectiveC我会这样做

UIImage *image = [[UIImage imageNamed:@"myImage.png"]   imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

但在Swift中,我尝试过所有这样的替代方案,但没有成功

var image : UIImage = UIImage(named:"myImage.png").imageWithRenderingMode(renderingMode: AlwaysOriginal)

它显示错误:使用未解析的标识符'AlwaysOriginal'

我怎么做？

Answer 1

这将是正确的语法:

(适用于Swift 3.x或Swift 4)

var image: UIImage? = UIImage(named:"myImage")?.withRenderingMode(.alwaysOriginal)

(对于Swift 2.x)

var image: UIImage? = UIImage(named:"myImage.png").imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)

但你也可以使用这个'快捷方式':

var image: UIImage? = UIImage(named:"myImage.png").imageWithRenderingMode(.AlwaysOriginal)