如何在自定义类型的 UIButton 中设置图像视图的颜色? [英] How to set the color of the image view in UIButton on type Custom?
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问题描述
我已经尝试了一切,但什么也没发生.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,但没有改变.
I've tried everything and nothing is happening. It just stays black. Am I missing something? I tried using the UIButton's image view but it doesn't make a change.
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
}()
推荐答案
正如 文档:
- withRenderingMode(_:)
- withRenderingMode(_:)
创建并返回一个具有指定渲染模式的新图像对象.
所以只写addButtonImage?.withRenderingMode(.alwaysTemplate)
不会改变addButtonImage
.使用方法如下:
So just writing addButtonImage?.withRenderingMode(.alwaysTemplate)
doesn't change the addButtonImage
. The way to use it would be like this:
var addButtonImage = UIImage(named: "AddFriend")
addButtonImage = addButtonImage?.withRenderingMode(.alwaysTemplate)
或者你可以简单地使用这一行:
or you can simply use this one line:
let addButtonImage = UIImage(named: "AddFriend")?.withRenderingMode(.alwaysTemplate)
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