IOS UICollectionView細胞不刷新滾動

後，我有一個基本的UICollectionView，如果我滾動將「重繪」對細胞的頂部的標籤，IOS UICollectionView細胞不刷新滾動

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- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 
{ 


    UICollectionViewCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:@"cellIdentifier" forIndexPath:indexPath]; 


    cell.backgroundColor=[UIColor greenColor]; 

    UILabel *title = [[UILabel alloc]initWithFrame:CGRectMake(0, 10, cell.bounds.size.width, 40)]; 
    [cell.contentView addSubview:title]; 

    //NSString *titleLbl = [NSString stringWithFormat:@"i = %d", indexPath.row]; 


    title.text = [self.arraya objectAtIndex:indexPath.row]; 

    return cell; 
}

如何解決它，所以它刷新滾動後的正確單元格？乾杯

來源

2014-03-03 MaKo

見http://stackoverflow.com/questions/16517844/uicollectionview-reload-data-issue，HTTP：// stackoverflow.com/questions/21753707/uilabel-overloading-in-uicollectionview，http://stackoverflow.com/questions/21798907/preventing-uicollectionview-from-redrawing等 – Anna

當你這樣做：

UILabel *title = [[UILabel alloc]initWithFrame:CGRectMake(0, 10, cell.bounds.size.width, 40)]; 
[cell.contentView addSubview:title];

你每次創建一個新的標題，並將其添加到您的內容查看。相反，嘗試加入代碼，您的UILabel，並更改現有的UILabel的文本，像這樣：

UILabel *title = (UILabel *)[cell.contentView viewWithTag:SOME_NUMBER]; 
if (!title) { 
    title = [[UILabel alloc]initWithFrame:CGRectMake(0, 10, cell.bounds.size.width, 40)]; 
    title.tag = SOME_NUMBER; 
    [cell.contentView addSubview:title]; 
} 
title.text = @"your new text"

來源

2014-05-12 06:20:25 Angela

IOS UICollectionView細胞不刷新滾動

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