你如何在 swift 3 中覆盖 layerClass? [英] How do you override layerClass in swift 3?

问题描述

我试图在 swift 3 中覆盖方法 layerClass() 但我收到错误 Method 没有覆盖其超类中的任何方法.在 swift 2.x 我就是这样做的，有谁知道新的语法?

override func layerClass() ->AnyClass { 返回 CAGradientLayer.self }

解决方案

请查看最新参考

a> 当您发现 Method 没有覆盖其超类中的任何方法 时，它的代码在以前版本的 Xcode/Swift 中有效.

<块引用>

声明

class var layerClass: AnyClass { get }

layerClass 现在作为 Swift 中的计算类属性导入.

所以，你需要像这样覆盖它:

override class var layerClass: AnyClass {返回 CAGradientLayer.self}

I'm trying to override the method layerClass() in swift 3 but I'm getting the error Method does not override any method from its superclass. In swift 2.x I was doing like this, does anyone know the new syntax?

override func layerClass() -> AnyClass { return CAGradientLayer.self }

解决方案

Please check the latest reference when you find Method does not override any method from its superclass with code which worked in former versions of Xcode/Swift.

Declaration

class var layerClass: AnyClass { get }

layerClass is now imported as a computed class property in Swift.

So, you need to override it like this:

override class var layerClass: AnyClass {
    return CAGradientLayer.self
}

这篇关于你如何在 swift 3 中覆盖 layerClass?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！