尝试在自定义视图文件中设置Gradient时,在XCode 8中出现错误“方法不会从其 super class 覆盖任何方法”。
该代码是
override class func layerClass() -> AnyClass {
return CAGradientLayer.self
}
当我删除覆盖时,会发生此错误
“具有Objective-C选择器'layerClass'的方法'layerClass()'与具有相同Objective-C选择器的 super class 'UIView'中的'layerClass'的吸气剂发生冲突”
完整代码在这里:
import UIKit
@IBDesignable
class CustomView: UIView {
override class func layerClass() -> AnyClass {
return CAGradientLayer.self
}
var gradientLayer: CAGradientLayer {
return layer as! CAGradientLayer
}
override func draw(_ rect: CGRect) {
// Drawing code
layer.masksToBounds = true
layer.borderWidth = 10.0
layer.borderColor = UIColor(red: 0.0, green: 64/225.0, blue: 128/225.0, alpha: 1.0).cgColor
layer.cornerRadius = 20.0
let startColor = UIColor(red: 102/225.0, green: 204/225.0, blue: 1.0, alpha: 1.0).cgColor
let endColor = UIColor(red: 0.0, green: 128/225.0, blue: 1.0, alpha: 1.0).cgColor
gradientLayer.colors = [startColor,endColor]
}
}
我是iOS plz的新手,请帮助我
最佳答案
layerClass
现在是一个吸气剂,因此您必须覆盖该吸气剂:
override public class var layerClass: Swift.AnyClass {
get {
return CAGradientLayer.self
}
}