在滾動時顯示不同圖像的表格視圖

Question

單擊按鈕，我在表格視圖中加載一些圖像。圖像加載正常並位於所需的位置。但當我滾動表格視圖時，圖像似乎會發生變化。讓我詳細說明了在我的表視圖中最初只有2行可見，並假設圖像在兩行中存在，並且在一行中有4個圖像。現在，當我向下或向上滾動表視圖時，在表格上方或下方滾動的行視圖框架將在其圖像視圖中顯示新圖像。並且每次當我滾動圖像不斷變化時。可能是什麼原因。我正在用這個抓我的頭。請幫助。我發佈了我的代碼的一部分： -

-(UITableViewCell*)tableView(UITableView*) 
ableViewcellForRowAtIndexPath(NSIndexPath*)indexPath { 

    UITableViewCell *cell = nil; 
    static NSString *AutoCompleteRowIdentifier = @"AutoCompleteRowIdentifier"; 
    cell = [tableView dequeueReusableCellWithIdentifier:AutoCompleteRowIdentifier]; 
    if (cell == nil) { 
     cell=[[[UITableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:AutoCompleteRowIdentifier] autorelease]; 

    } 
    UIImageView * imageView1 = [[[UIImageView alloc] initWithFrame:CGRectMake(25, 4, 80, 80)] autorelease]; 
    UIImageView * imageView2 = [[[UIImageView alloc] initWithFrame:CGRectMake(115,4,80, 80)] autorelease]; 
    UIImageView * imageView3 = [[[UIImageView alloc] initWithFrame:CGRectMake(205,4, 80, 80)] autorelease]; 
    UIImageView * imageView4 = [[[UIImageView alloc] initWithFrame:CGRectMake(295,4, 80, 80)] autorelease]; 
    imageView1.tag = 1; 
    imageView2.tag = 2; 
    imageView3.tag = 3; 
    imageView4.tag = 4; 
    [cell.contentView addSubview:imageView1]; 
    [cell.contentView addSubview:imageView2]; 
    [cell.contentView addSubview:imageView3]; 
    [cell.contentView addSubview:imageView4]; 

    UIImageView * imageView; 
    for (int i = 1; i <= 4; i++) { 
     imageView = (UIImageView *)[cell.contentView viewWithTag:i]; 
     imageView.image = nil; 

    } 

    int photosInRow; 
    if ((indexPath.row < [tableView numberOfRowsInSection:indexPath.section] - 1) || 
     (count % 4 == 0)) { 
     photosInRow = 4; 
    } else { 
     photosInRow = count % 4; 
    } 

    for (int i = 1; i <= photosInRow; i++) { 
     imageView = (UIImageView *)[cell.contentView viewWithTag:i]; 

     [self setImage1:imageView]; 

    } 

    return cell; 
} 


-(void)setImage1:(UIImageView *)imageView 
{ 

    UIImageView *imageView1=[[UIImageView alloc]init]; 

    imageView1=imageView; 
    imageView1.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png", j]]; 

    j++; 

} 

任何幫助wi將不勝感激。

感謝， 克里斯蒂

Answer 1

您的setImage1:方法應該修改爲拍攝照片索引，因爲j不是跟蹤當前圖像的正確方法，因爲cellForRowAtIndexPath:可能以任何順序調用。

- (void)setImage1:(UIImageView *)imageView forPhotoIndex:(NSInteger)index { 
    imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%ld.png", index]]; 
} 

和cellForRowAtIndexPath:小的修改將是，

[..] 
for (int i = 1; i <= photosInRow; i++) { 
    imageView = (UIImageView *)[cell.contentView viewWithTag:i]; 
    [self setImage1:imageView forPhotoIndex:(indexPath.row * 4 + i - 1)]; 
} 
[..] 

Answer 2

當重用一個細胞，你現在只需要添加新的UImageView實例。重用的單元格已經添加了子視圖，您只需添加更多子視圖。請務必只添加新的UIImageViews如果小區沒有再使用前（如果 - 子句中）

if (cell == nil) { 
    cell=[[[UITableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:AutoCompleteRowIdentifier] autorelease]; 

    UIImageView * imageView1 = [[[UIImageView alloc] initWithFrame:CGRectMake(25, 4, 80, 80)] autorelease]; 
    UIImageView * imageView2 = [[[UIImageView alloc] initWithFrame:CGRectMake(115,4,80, 80)] autorelease]; 
    UIImageView * imageView3 = [[[UIImageView alloc] initWithFrame:CGRectMake(205,4, 80, 80)] autorelease]; 
    UIImageView * imageView4 = [[[UIImageView alloc] initWithFrame:CGRectMake(295,4, 80, 80)] autorelease]; 
    imageView1.tag = 1; 
    imageView2.tag = 2; 
    imageView3.tag = 3; 
    imageView4.tag = 4; 
    [cell.contentView addSubview:imageView1]; 
    [cell.contentView addSubview:imageView2]; 
    [cell.contentView addSubview:imageView3]; 
    [cell.contentView addSubview:imageView4]; 
} 

編輯：見設置實際圖像有關的問題下面的評論。