WKWebView无需重新加载页面即可评估Javascript [英] WKWebView Evaluate Javascript without reloading page

问题描述

当前，我只能通过将JavaScript添加到Webview的配置的userContentController中并重新加载页面来弄清楚如何评估javascript：

Currently I can only figure out how to evaluate javascript by adding it to the webview's configuration's userContentController and reloading the page like so:

WKUserScript *script = [[WKUserScript alloc] initWithSource:source injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
[self.webView.configuration.userContentController addUserScript:script];
[self.webView reload];

我如何在WKWebView上执行JavaScript，类似于旧版WebView的 stringByEvaluatingJavaScriptFromString： 这样我不必重新加载页面？

How can I execute javascript on my WKWebView similarly to the old WebView's stringByEvaluatingJavaScriptFromString: so that I don't have to reload the page?

我正在尝试获得与

[webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.querySelector('meta[name=viewport]').setAttribute('content', 'width=%d;', false); ", width]];

推荐答案

[webView evaluateJavaScript:javascriptString completionHandler:nil];

执行与您为UIWebView列出的功能相同的功能

performs the same function as the one you have listed for UIWebView

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