xamarin.ios - 在 UIAlertView (iOS, Xamarin) 上添加 UITextView 而不使用任何第三方库

Question

我想在 iOS 中显示一个对话框并添加一个 UITextView到对话框的 View 。 UITextView textView 包含带有电子邮件、电话和网址的可点击链接的文本。我能够触发对话框，但只能使用标题和一个确定按钮。没有将 textview 添加到对话框 View 中。我不确定这里的问题是与 textview 还是与将 View 添加到对话框的方式有关。

请在下面检查我的代码:

 UITextView textView = new UITextView();
 textView.Editable = false;
 textView.DataDetectorTypes = UIDataDetectorType.All;
 textView.Message = message;
 var dlg = UIAlertController.Create(Title ?? String.Empty, null, UIAlertControllerStyle.Alert);
 dlg.View.AddSubview(textView);
 dlg.AddAction(UIAlertAction.Create(OkText, UIAlertActionStyle.Default, action => Submit()));                

 var top = Utils.GetTopViewController();
 top.PresentViewController(dlg, animated: true, completionHandler: null);

谢谢，

Answer 1

似乎你需要一个自定义的弹出 View 来完成你所需要的，我为你写了一个示例，这是代码:

这是 ViewController.cs:

public partial class ViewController : UIViewController
{
    public ViewController (IntPtr handle) : base (handle)
    {
    }

    public override void ViewDidLoad ()
    {
        this.View.BackgroundColor = UIColor.Gray;
        this.View.AddGestureRecognizer (new UITapGestureRecognizer (() => {
            CustomPopUpView cpuv = new CustomPopUpView (new CoreGraphics.CGSize (300, 200));
            cpuv.PopUp (true,delegate{
                Console.WriteLine("cpuv will close");
            });
        }));
    }
}

这是 CustomPopUpView.cs:

public class CustomPopUpView : UIView
{
    public delegate void PopWillCloseHandler ();
    public event PopWillCloseHandler PopWillClose;

    private UIVisualEffectView effectView = new UIVisualEffectView (UIBlurEffect.FromStyle (UIBlurEffectStyle.Dark));
    private UIButton btnClose = new UIButton (UIButtonType.System);

    public CustomPopUpView (CGSize size)
    {
        nfloat lx = (UIScreen.MainScreen.Bounds.Width - size.Width) / 2;
        nfloat ly = (UIScreen.MainScreen.Bounds.Height - size.Height) / 2;
        this.Frame = new CGRect (new CGPoint (lx, ly), size);

        effectView.Alpha = 0;

        this.BackgroundColor = UIColor.White;

        nfloat btnHeight = 40;
        btnClose.SetTitle ("Close", UIControlState.Normal);
        btnClose.Frame = new CGRect (0, this.Frame.Height - btnHeight, this.Frame.Width, btnHeight);
        btnClose.TouchUpInside += delegate {
            Close();
        };
        this.AddSubview (btnClose);
    }

    public void PopUp (bool animated = true, Action popAnimationFinish = null)
    {
        UIWindow window = UIApplication.SharedApplication.KeyWindow;
        effectView.Frame = window.Bounds;
        window.EndEditing (true);
        window.AddSubview (effectView);
        window.AddSubview (this);

        if (animated) {
            Transform = CGAffineTransform.MakeScale (0.1f, 0.1f);
            UIView.Animate (0.15, delegate {
                Transform = CGAffineTransform.MakeScale (1, 1);
                effectView.Alpha = 0.8f;
            },delegate {
                if(null != popAnimationFinish)
                    popAnimationFinish ();
            });
        } else {
            effectView.Alpha = 0.8f;
        }
    }

    public void Close (bool animated = true)
    {
        if (animated) {
            UIView.Animate (0.15, delegate {
                Transform = CGAffineTransform.MakeScale (0.1f, 0.1f);
                effectView.Alpha = 0;
            }, delegate {
                this.RemoveFromSuperview();
                effectView.RemoveFromSuperview();
                if(null != PopWillClose) PopWillClose ();
            });
        } else {
            if(null != PopWillClose) PopWillClose ();
        }
    }
}

您可以向此 CustomPopUpView 添加任何您想要的内容，或者您​​可以继承它并创建您自己的弹出窗口。

希望它可以帮助你。