To make imageWithRenderingMode work, you need to seperate steps of creating UIImage and setting renderingmode.

// Correct way
let image = UIImage(named: "ImageName")!
self.someImgview.image = image.imageWithRenderingMode(.AlwaysTemplate)

// Wrong way
self.someImgview.image = UIImage(named: "ImageName")!.imageWithRenderingMode(.AlwaysTemplate)