无法子类化WKWebView [英] Cannot subclass WKWebView

问题描述

我正在尝试继承WKWebView.当我实现自己的初始化程序时，出现此错误:

I am trying to subclass WKWebView. When I implement my own initializer, I got this error:

'required' initializer 'init(coder:)' must be provided by subclass of 'WKWebView'

好吧，众所周知，我们必须为UIView的子类实现它.对于UIView的直接子类，它只是实现即可工作，但是对于WKWebView，它似乎并不那么简单.我遵循了Fix-it提示，并将此代码段添加到了代码中:

Ok, that is well known that we have to implement it for subclasses of UIView. For a direct subclass of UIView it works just implementing it, but with WKWebView it does not seem so simple. I followed the Fix-it hint, and this snippet is added to the code:

required @availability(*, unavailable) convenience init!(coder: NSCoder!) {
        fatalError("init(coder:) has not been implemented")
    }

所以我得到了一个类似于以下的类:

So I get a class like the following:

import WebKit


class TSWebView : WKWebView {

    let s: String
    let i: Int

    init(s: String, i: Int) {
        self.s = s
        self.i = i
        super.init(frame: CGRectZero, configuration: WKWebViewConfiguration())
    }

    required @availability(*, unavailable) convenience init!(coder: NSCoder!) {
        fatalError("init(coder:) has not been implemented")
    }
}

但是，当我这样做时，我又遇到了另外四个错误:

However, when I do this I get these four other errors:

expected declaration
    required @availability(*, unavailable) convenience init!(coder: NSCoder!) {

consecutive declarations on a line must be separated by ';'
    required @availability(*, unavailable) convenience init!(coder: NSCoder!) {

cannot override 'init' which has been marked unavailable
    required @availability(*, unavailable) convenience init!(coder: NSCoder!) {

'required' modifier must be present on all overrides of a required initializer
    required @availability(*, unavailable) convenience init!(coder: NSCoder!) {

有什么想法吗?我的Xcode版本是6.1.1(6A2008a).非常感谢.

Any ideas? My Xcode Version is 6.1.1 (6A2008a). Thanks a lot.

推荐答案

只需重写常规的初始化即可.这对我有效，Swift 5.

Just override the regular initialization like this. This worked for me, Swift 5.

override init(frame: CGRect, configuration: WKWebViewConfiguration) {
    super.init(frame: frame, configuration: configuration)
}

required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

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