WKWebview evaluateJavascript无法正常工作，抛出错误 [英] WKWebview evaluateJavascript is not working, throws an error

问题描述

我正在尝试从WKWebview中的远程站点调用现有函数：

I am trying to call an existent function from a remote site in a WKWebview:

function addtext (text) {
 jQuery("#webviewtest").html(text);
}

使用：

[self.WebView evaluateJavaScript:@"addtext(\"This is a text from app\");" completionHandler:^(id Result, NSError * error) {
    NSLog(@"Error -> %@", error);
}];

但这是一个错误：

Error Domain=WKErrorDomain Code=4 "A JavaScript exception occurred" UserInfo=0x170c788c0 {NSLocalizedDescription=A JavaScript exception occurred}

这很简单！我必须错过一些非常愚蠢的东西！

This is so simple! I am must missing something really stupid!

推荐答案

找到一个解决方案，它很简单，就像我期待的那样，我正在添加javascript在视图完成加载内容之前（在Dom Ready之前）。所以我只需要将代码移到下面的委托方法中：

Found a solution, it was simple as I was expecting, I was adding the javascript before the view complete load the content (before the Dom Ready). So I just had to move my code to the delegate method below:

• webView：didFinishNavigation :(来自WKNavigationDelegate ）

• webView:didFinishNavigation: (from WKNavigationDelegate)

我希望这有助于某人。

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