Xamarin iOS webview Zoom无效

Question

当我将DraggingStarted或任何其他ScrollView事件添加到webview时，Zooming被禁用。

string urlAddress = "http://google.com";
NSUrl url = NSUrl.FromString(urlAddress);
//URL Requst Object
NSUrlRequest requestObj = NSUrlRequest.FromUrl(url);
webview.LoadRequest (requestObj);

//在线条缩放停止后添加

webview.ScrollView.DraggingStarted += (object sender, EventArgs e) => {};

我试过以下但没有运气

webview.ScrollView.ViewForZoomingInScrollView = (scrollView) => {
    return webview;
};

Answer 1

您是否尝试将代理设置为ScrollView而不是使用事件？像这样：

public class ScrollViewDelegate : UIScrollViewDelegate
{
    public override void DraggingStarted(UIScrollView scrollView)
    {
        Console.WriteLine("DraggingStarted");
    }
}

webview.ScrollView.Delegate = new ScrollViewDelegate();

修改 这是我用于测试的完整代码，它对我有用：

public class IPadViewController1 : UIViewController
{
    public override void ViewDidLoad()
    {
        base.ViewDidLoad();

        UIWebView webview = new UIWebView(new CGRect(0, 0, UIScreen.MainScreen.Bounds.Width, UIScreen.MainScreen.Bounds.Height));
        webview.ScrollView.Delegate = new ScrollViewDelegate();
        webview.ScalesPageToFit = true;
        View.AddSubview(webview);

        string urlAddress = "http://google.com";
        NSUrl url = NSUrl.FromString(urlAddress);
        //URL Requst Object
        NSUrlRequest requestObj = NSUrlRequest.FromUrl(url);
        webview.LoadRequest(requestObj);
    }
}