如何在ios的其他函数中获取收集单元格？

我有UICollectionView，其中包含许多自定义单元格。当用户长按时，我有一个长按手势，然后单元格开始摇晃，并在其上添加了删除按钮。当我按删除按钮时，单元格将从集合视图中删除

长按代码。

-(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
{
    p = [gestureRecognizer locationInView:self.collection_view];
    NSIndexPath *indexPath = [self.collection_view indexPathForItemAtPoint:p];
    if (gestureRecognizer.state != UIGestureRecognizerStateEnded)
    {
        return;
    }

    if (indexPath == nil)
    {
        NSLog(@"couldn't find index path");
    }
    else
    {
        [[NSUserDefaults standardUserDefaults]setValue:@"yes" forKey:@"longPressed"];
        [self.collection_view reloadData];
    }
    if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {
        NSLog(@"UIGestureRecognizerStateEnded");
        //Do Whatever You want on End of Gesture
    }
    else if (gestureRecognizer.state == UIGestureRecognizerStateBegan){
        NSLog(@"UIGestureRecognizerStateBegan.");
        //Do Whatever You want on Began of Gesture
    }

    pgr
    = [[UIPanGestureRecognizer alloc]
       initWithTarget:self action:@selector(handePanPress:)];
    // To detect after how many seconds you want shake the cells
    pgr.delegate = self;
    [self.collection_view addGestureRecognizer:pgr];

    //show the done button here
    navButtonDone = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:self action:@selector(navBtnDone:)];
    self.navigationItem.rightBarButtonItem = navButtonDone;

}

当长手势开始时，我也会在导航栏上添加右键，按下导航栏按钮，我会停止动画并移除删除按钮。我可以在iPhone 5s中移除删除按钮，但在iPhone 6中无法移除

下面是代码

- (IBAction)navBtnDone:(id)sender
{
        if([[[NSUserDefaults standardUserDefaults]valueForKey:@"longPressed"] isEqualToString:@"yes"])
        {
            [[NSUserDefaults standardUserDefaults]setValue:@"no" forKey:@"longPressed"];
            [_deleteButton removeFromSuperview];
            [self.collection_view reloadData];
            [self.collection_view removeGestureRecognizer:pgr];
            self.navigationItem.rightBarButtonItem=nil;
        }
}

---

这里我刚刚添加了

[\u deleteButton removeFromSuperview]如何在每个函数中获取单元格&删除删除按钮。
要根据单元格的索引XPath检索单元格，可以调用

UICollectionViewCell *someCell = [myCollectionView cellForItemAtIndexPath:indexPath];

然后用鼠标删除删除按钮

if (someCell) {
    // Remove the delete button on the cell.
    [someCell.deleteButton removeFromSuperView];
}

有两种方法

将IndexPath存储在全局变量中
在你的

 NSIndexPath *globalIndexPath

在手势识别器中

-(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
{
   p = [gestureRecognizer locationInView:self.collection_view];
   globalIndexPath = [self.collection_view indexPathForItemAtPoint:p];
   //Other Stuff
}

在删除按钮操作中

- (IBAction)navBtnDone:(id)sender
{
   //Other Stuff
   UICollectionViewCell *cell = [myCollectionView cellForItemAtIndexPath: globalIndexPath];
   if (cell) {
     [cell.deleteButton removeFromSuperView];
   }
}

将Indexpath.row值设置为Barbutton的标记值

-(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
{ 
   p = [gestureRecognizer locationInView:self.collection_view];
   NSIndexPath *indexPath = [self.collection_view indexPathForItemAtPoint:p];
   //Other Stuff
   //show the done button here
   navButtonDone = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:self action:@selector(navBtnDone:)];
   navButton.tag = indexPath.row //IMPORTANT
   self.navigationItem.rightBarButtonItem = navButtonDone;

}

在你的按钮动作中

- (IBAction)navBtnDone:(id)sender
{
   UIBarButtonItem *btn = (UIBarButtonItem *)sender;
   UItableViewCell *cell = [myCollectionView cellForItemAtIndexPath: [NSIndexPath indexPathWithRow: btn.tag inSection:0]];
   [cell.deleteButton removeFromSuperView];

}