C# uipopover控制器正在解除monotouch的分配
我想,我遇到了一个问题,C# uipopover控制器正在解除monotouch的分配,c#,ios,xamarin.ios,garbage-collection,uipopover,C#,Ios,Xamarin.ios,Garbage Collection,Uipopover,我想,我遇到了一个问题,uipopcovercontroller在被解除之前被解除分配,这很奇怪,因为uipopcovercontroller是一个类变量。任何帮助都将不胜感激 这里是错误,我得到了 MonoTouch.Foundation.MonoTouchException: Objective-C exception thrown. Name: NSGenericException Reason: -[UIPopoverController dealloc] reached while
uipopcovercontroller
在被解除之前被解除分配,这很奇怪,因为uipopcovercontroller是一个类变量。任何帮助都将不胜感激
这里是错误,我得到了
MonoTouch.Foundation.MonoTouchException: Objective-C exception thrown. Name: NSGenericException Reason: -[UIPopoverController dealloc] reached while popover is still visible.
at at (wrapper managed-to-native) MonoTouch.Foundation.NSObject:monotouch_release_managed_ref (intptr)
at MonoTouch.Foundation.NSObject.ReleaseManagedRef () [0x00000] in /Developer/MonoTouch/Source/monotouch/src/Foundation/NSObject.cs:99
at MonoTouch.Foundation.NSObject+NSObject_Disposer.Drain (MonoTouch.Foundation.NSObject ctx) [0x00062] in /Developer/MonoTouch/Source/monotouch/src/shared/Foundation/NSObject2.cs:602
at at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:38
at Lab_assistant.Application.Main (System.String[] args) [0x00008] in /working/Lab_assistant/Main.cs:17
这是我正在学习的课程
using System.Drawing;
using MonoTouch.Foundation;
using MonoTouch.UIKit;
namespace Lab_assistant
{
[Register("ViewView")]
public class ViewView:UIView
{
public Block _b { set; get;}
public EventHandler _touched;
private UIView _popViewText;
private UIViewController _Controller;
private UIPopoverController _popUp;
Boolean edit;
public ViewView (Block b,BlockManger.Del TheMethod)
{
_b = b;
this.Frame = b._location;
this.BackgroundColor = UIColor.White;
this.AddGestureRecognizer (new UILongPressGestureRecognizer (tapped));
TheMethod (_b,this);
this.Frame = new System.Drawing.RectangleF(b._location.Location, new System.Drawing.SizeF (b._location.Width, b._location.Height + 2));
}
[Export("tapped")]
protected void tapped(UIGestureRecognizer sender)
{
TouchOccoured ();
}
public void Edit()
{
UIButton btn = new UIButton (UIButtonType.RoundedRect);
_popViewText = new UIView(new System.Drawing.RectangleF(new System.Drawing.PointF(0,0), new System.Drawing.SizeF(200,200)));
_popViewText.BackgroundColor = UIColor.DarkGray;
btn.Hidden = false;
btn.Frame = new System.Drawing.RectangleF(new System.Drawing.PointF(0,31),new System.Drawing.SizeF(100,30));
btn.SetTitle ("Remove", UIControlState.Normal);
UIButton btn2 = new UIButton (UIButtonType.RoundedRect);
btn2.Hidden = false;
btn2.Frame = new System.Drawing.RectangleF(new System.Drawing.PointF(0,0),new System.Drawing.SizeF(100,30));
btn2.SetTitle ("Resize", UIControlState.Normal);
_popViewText.AddSubview (btn);
_popViewText.AddSubview (btn2);
_Controller = new UIViewController ();
_Controller.Add (_popViewText);
_popUp = new UIPopoverController(_Controller);
btn.TouchUpInside += (object sender, EventArgs e) =>
{
this.RemoveFromSuperview();
edit = false;
};
}
public void EditBlock()
{
if (!edit)
{
edit = true;
_popUp.PopoverContentSize = new SizeF (200, 200);
_popUp.PresentFromRect (new System.Drawing.RectangleF (new PointF(0,0), new System.Drawing.SizeF (20, 20)), this, UIPopoverArrowDirection.Left, true);
//_popViewText = new UIView (rec);
}
}
public void TouchOccoured()
{
if(_touched != null)
{
this.Edit ();
this.EditBlock ();
_touched (this, null);
}
}
}
}
非常感谢您的帮助以下是一些想法:
- 确保只调用一次
Edit
- 确保未释放视图(通过实现Dispose重载并在其中放置断点或Console.WriteLine,可以轻松地执行此操作)
Edit
被多次调用,导致多个UIPopoverController
被实例化。如果是这样的话,你可以用这样的方法来修复它:
公共作废编辑()
{
if(_popup!=null&&u popup.popopovervisible){
_弹出。驳回(假);
_popup.Dispose();
}
//你的代码
}
非常感谢,由于长按手势,我正在调用edit,这导致它被多次调用