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iOS 发布时间：2022-03-30 发布网站：大佬教程 code.js-code.com

大佬教程收集整理的这篇文章主要介绍了使用Xamarin.iOS在单击处理程序中添加UICollectionViewCell中的按钮，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。

我正在重写一个使用UITableView的屏幕到UICollectionView.但我在单元格内的按钮上遇到单击处理程序时遇到问题.

collectionView.RegisterNibForCell (DocumentViewCell.Nib,docCellId);    
...

public override UICollectionViewCell GetCell (UICollectionView collectionView,MonoTouch.Foundation.NSIndexPath indexPath)
{
    var docCell = (DocumentViewCell)collectionView.DequeueReusableCell (docCellId,indexPath);                
    docCell.btndelete.Hidden = !EditMode;
    docCell.btndelete.TouchUpInside += delegate(object sender,EventArgs E) {
        Logging.Debug("Crashes before if reaches here");
    };
    return docCell;
}

我知道单元格开始被重用,这很可能在发生这种情况时不起作用,但现在当按下删除按钮时,它只会立即崩溃,只有一个元素在列表中.一切都很好,直到我按下按钮然后我得到下面的堆栈跟踪.基于我的UITableView代码几乎完全相同,我认为没有理由发生这种情况.

有没有人使用基于Nib的CollectionView单元格完成此操作？任何帮助非常感谢！

堆栈跟踪：

at (wrapper managed-to-nativE) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,String[],intptr,intptr) <IL 0x0009f,0xffffffff>
 at MonoTouch.UIKit.UIApplication.Main (String[],String,String) [0x0004c] in /Developer/MonoTouch/source/monotouch/src/UIKit/UIApplication.cs:38
 at SALEsApp.Application.Main (String[]) [0x00000] in /MyApp/Main.cs:18
 at (wrapper runtime-invokE) <Module>.runtime_invoke_void_object (object,intptr) <IL 0x00050,0xffffffff>

Native stacktrace:

0   SALEsApp                            0x0009a85c mono_handle_native_sigsegv + 284
1   SALEsApp                            0x0000e138 mono_sigsegv_signal_handler + 248
2   libsystem_c.dylib                   0x990a78cb _sigtramp + 43
3   ???                                 0xffffffff 0x0 + 4294967295
4   UIKit                               0x01990258 -[UIApplication sendAction:@R_77_10586@rget:fromSender:forEvent:] + 61
5   UIKit                               0x01a51021 -[UIControl sendAction:to:forEvent:] + 66
6   UIKit                               0x01a5157f -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 578
7   UIKit                               0x01a506e8 -[UIControl touchesEnded:withEvent:] + 546
8   UIKit                               0x01c541d3 _UIGestureRecognizerupdate + 7407
9   CoreFoundation                      0x03ecbafe __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30

更新

这段代码工作正常

public override UICollectionViewCell GetCell (UICollectionView collectionView,MonoTouch.Foundation.NSIndexPath indexPath)
{
    var docCell = (DocumentViewCell)collectionView.DequeueReusableCell (DocumentViewCell.Key,indexPath);
    docCell.btndelete.Hidden = !EditMode;
    docCell.btndelete.TouchUpInside -= HandleTouchUpInside;
    docCell.btndelete.TouchUpInside += HandleTouchUpInside;
    return docCell;
}

void HandleTouchUpInside (object sender,EventArgs E)
{
    Logging.Debug("No crash");
}