我有一个表格视图,在单元格中有 2 个子视图(带有标签的小缩略图),如果没有要加载的内容(当只有第一个子视图具有要加载的图像和标题时),我想隐藏第二个子视图。
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *reuse = @"reuse";
ContentTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuse];
if (cell == nil) {
cell = [[[NSBundle mainBundle] loadNibNamed:[Utils buildNibNameFromPrefix:@"ContentTableViewCell"] owner:self options:nil] objectAtIndex:0];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
cell.cellIndex = indexPath.row;
NSUInteger selectedIndex = [Utils getIndexForContentTitle:[Utils getContentBookmark]];
NSUInteger titleIndex = indexPath.row * self.noOfContentPerCell;
NSUInteger cellIndex = NSNotFound;
for (int i = 0; i < self.noOfContentPerCell; i++) {
@try {
if (titleIndex == selectedIndex) {
cellIndex = i;
}
NSArray *content;
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"unlock"] == NO) {
content = CONTENT_INDEXS;
}
else {
content = CONTENT_INDEXS_UNLOCKED;
}
NSString *title = [content objectAtIndex:titleIndex];
[cell setTitle:title forContentAtIndex:i];
NSString *thumbnail;
if ( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone )
{
thumbnail = [NSString stringWithFormat:@"%@-iphone-thumbnail.jpg", title];
}
else
{
thumbnail = [NSString stringWithFormat:@"%@-ipad-thumbnail.jpg", title];
}
[cell setImageNamed:thumbnail atIndex:i];
[cell showContainerAtIndex:i];
}
@catch (NSException *exception) {
[cell hideContainerAtIndex:i];
}
titleIndex++;
}
return cell;
}
它适用于 iOS 6,如果没有要加载的内容,@catch 隐藏此子视图,但在 iOS 5 上崩溃发生在:
NSString *title = [content objectAtIndex:titleIndex];