我已经尝试过一切,没有任何事情发生。它只是保持黑色。我错过了什么吗?我尝试使用UIButton的图像视图,但它没有做出改变。
lazy var addFriendButton: UIButton = {
self.friendButton = UIButton(type: .Custom)
self.friendButton.bounds = CGRectMake(0, 0, 120, 80)
self.friendButton.backgroundColor = UIColor.redColor()
self.friendButton.translatesAutoresizingMaskIntoConstraints = false
self.friendButton.setTitle("Add Friend", forState: .Normal)
self.friendButton.titleLabel?.font = UIFont(name: "HelveticaNeue", size: 12)
self.friendButton.addTarget(self, action: #selector(addFriend), forControlEvents: .TouchUpInside)
let addButtonImage = UIImage(named: "AddFriend")
addButtonImage?.imageWithRenderingMode(.AlwaysTemplate)
self.friendButton.setImage(addButtonImage, forState: .Normal)
self.friendButton.setTitleColor(UIColor.darkGrayColor(), forState: .Normal)
self.friendButton.imageView?.image = addButtonImage
// Not working here
self.friendButton.imageView?.tintColor = UIColor.whiteColor()
return self.friendButton
}()
答案 0 :(得分:5)
正如documentation中所述:
- withRenderingMode(_:)
使用指定的渲染模式创建并返回一个新图像对象。
因此,只需撰写addButtonImage?.withRenderingMode(.alwaysTemplate)
即可更改addButtonImage
。使用它的方式是这样的:
var addButtonImage = UIImage(named: "AddFriend")
addButtonImage = addButtonImage?.withRenderingMode(.alwaysTemplate)
或者你可以简单地使用这一行:
let addButtonImage = UIImage(named: "AddFriend")?.withRenderingMode(.alwaysTemplate)
答案 1 :(得分:0)
Sam_M的答案更新为Swift 3:
let addButtonImage = UIImage(named: "AddFriend")?.withRenderingMode(.alwaysTemplate)