我正在创建我的开放网格视图。
我创建了一个看起来像这样的自定义单元格:
我像这样填充它:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *MyIdentifier = @"Cell";
TableGalleryCustomCell *cell = (TableGalleryCustomCell*)[tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if( cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"TableGalleryCustomCell" owner:nil options:nil];
for (id currentObject in topLevelObjects) {
if ([currentObject isKindOfClass:[UITableViewCell class]]) {
cell = (TableGalleryCustomCell*)currentObject;
break;
}
}
}
if (countingIndex < [[[self.appDelegate rssParser] rssItems] count]) {
cell.firstAddress.text = [[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] Address];
cell.firstPrice.text = [[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] Deposit];
if ([[[[[[self appDelegate] rssParser]rssItems]objectAtIndex:countingIndex] imageURLs] count] != 0 ) {
[cell.firstImage setImageWithURL:[NSURL URLWithString:[[[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] imageURLs] objectAtIndex:0.0]]];
cell.firstImage.tag = countingIndex;
}
}
countingIndex++;
if (countingIndex < [[[self.appDelegate rssParser] rssItems] count]) {
cell.secondAddress.text = [[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] Address];
cell.secondPrice.text = [[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] Deposit];
if ([[[[[[self appDelegate] rssParser]rssItems]objectAtIndex:countingIndex] imageURLs] count] != 0 ) {
[cell.secondImage setImageWithURL:[NSURL URLWithString:[[[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] imageURLs] objectAtIndex:0.0]]];
cell.secondImage.tag = countingIndex;
}
}
countingIndex++;
if (countingIndex < [[[self.appDelegate rssParser] rssItems] count]) {
cell.thirdAddress.text = [[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] Address];
cell.thirdPrice.text = [[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] Deposit];
if ([[[[[[self appDelegate] rssParser]rssItems]objectAtIndex:countingIndex] imageURLs] count] != 0 ) {
[cell.thirdImage setImageWithURL:[NSURL URLWithString:[[[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] imageURLs] objectAtIndex:0.0]]];
cell.thirdImage.tag = countingIndex;
}
}
countingIndex++;
if (countingIndex < [[[self.appDelegate rssParser] rssItems] count]) {
cell.fourthAddress.text = [[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] Address];
cell.fourthPrice.text = [[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] Deposit];
if ([[[[[[self appDelegate] rssParser]rssItems]objectAtIndex:countingIndex] imageURLs] count] != 0 ) {
[cell.fourthImage setImageWithURL:[NSURL URLWithString:[[[[[self.appDelegate rssParser] rssItems] objectAtIndex:countingIndex] imageURLs] objectAtIndex:0.0]]];
cell.fourthImage.tag = countingIndex;
}
}
countingIndex++;
return cell;
}
它有点乱,但它有效.....直到我滚动。加载图像后,滚动屏幕,图像消失。
我相信这可能是由于细胞的imageViews丢失了?
我尝试了完全相同的实现,但每个单元格中只有1个imageView,并且一切都很好。
非常感谢正确方向的任何一点。
感谢您的帮助,感谢您的时间。
答案 0 :(得分:3)
分享我的经验:
有类似的问题。我在应用程序中有很多表,其中一个数据会随机消失,最终整个表都会消失。
对我而言,问题在于我将细胞出列,给予他们所有相同的“独特”身份。因此,几个表共享相同的ID,我相信它们是相互冲突的,并且弄乱了我正在查看的单元格。
给每张桌子它自己的唯一标识符为我解决了问题。 (DAH!)
答案 1 :(得分:2)
我认为问题是因为您的单元格正在出列,并且您使用indexPath.row以外的行信息在tableView:cellForRowAtIndexPath:
中填充单元格。
也许可以尝试以下几点:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSArray * rssItems;
id rssItem;
static NSString * MyIdentifier = @"Cell";
TableGalleryCustomCell *cell = (TableGalleryCustomCell*)[tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if( cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"TableGalleryCustomCell" owner:nil options:nil];
for (id currentObject in topLevelObjects) {
if ([currentObject isKindOfClass:[UITableViewCell class]]) {
cell = (TableGalleryCustomCell*)currentObject;
break;
}
}
}
rssItems = [[self.appDelegate rssParser] rssItems];
if (indexPath.row < [rssItems count]) {
rssItem = [rssItems objectAtIndex:indexPath.row];
cell.firstAddress.text = [rssItem Address];
cell.firstPrice.text = [rssItem Deposit];
if ([[rssItem imageURLs] count] != 0 ) {
[cell.firstImage setImageWithURL:[NSURL URLWithString:[[rssItem imageURLs] objectAtIndex:0.0]]];
cell.firstImage.tag = indexPath.row;
}
}
return cell;
}