禁止webview页面放大缩小

// 当内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation{
    [self forbidWebviewEnlargedAndShrink:webView];
}

//禁止webview页面放大缩小
-(void)forbidWebviewEnlargedAndShrink:(WKWebView *)webView{
    NSString* javascript = @"var meta = document.createElement('meta');meta.setAttribute('name', 'viewport');meta.setAttribute('content', 'width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no');document.getElementsByTagName('head')[0].appendChild(meta);";
    [webView evaluateJavaScript:javascript completionHandler:nil];
}

//禁止滚动
UIScrollView *tempView=(UIScrollView *)[_wkWebView.subviews objectAtIndex:0];
        tempView.scrollEnabled=NO;