WKWebView 加载H5页面禁止缩放功能

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
    NSString *injectionJSString = @"var script = document.createElement('meta');"
    "script.name = 'viewport';"
    "script.content=\"width=device-width, user-scalable=no\";"
    "document.getElementsByTagName('head')[0].appendChild(script);";
    [webView evaluateJavaScript:injectionJSString completionHandler:nil];
}