[英]How to prevent UITableViewCell's backgroundView from clearing when tapped?
For some strange reason, when a user taps on a cell in my UITableView, the cell.backgroundView
image clears and it just displays the gray background that I set as the placeholder. 出于某些奇怪的原因,当用户在UITableView中点击一个单元格时,
cell.backgroundView
图像将清除,并且仅显示我设置为占位符的灰色背景。 As far as I can tell, there's nothing in didSelectRowAtIndexPath
that would tell the backgroundView to reset. 据我所知,
didSelectRowAtIndexPath
中没有任何东西可以告诉backgroundView重置。 Why is this happening? 为什么会这样呢?
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// Cell Identifier
static NSString *SecondCellIdentifier = @"SecondMatchCenterCell";
MatchCenterCell *cell = [tableView dequeueReusableCellWithIdentifier:SecondCellIdentifier];
if (!cell) {
// if no cell could be dequeued create a new one
cell = [[MatchCenterCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:SecondCellIdentifier];
}
// Separator style
tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
// title of the item
_searchTerm = [[[[_matchCenterData objectAtIndex:indexPath.section] objectForKey:@"Top 3"] objectAtIndex:0]objectForKey:@"Search Term"];
cell.textLabel.text = _searchTerm;
// Display placeholder while downloading images using background thread
cell.backgroundColor = [UIColor lightGrayColor];
cell.imageView.image = nil;
// asynchronously download image
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:_matchCenterData[indexPath.section][@"Top 3"][indexPath.row+1][@"Image URL"]]];
dispatch_async(dispatch_get_main_queue(), ^{
// Setup imageView
UIImageView *imageView = [[UIImageView alloc]initWithImage:[UIImage imageWithData:imageData]];
imageView.contentMode = UIViewContentModeScaleAspectFill;
imageView.clipsToBounds = YES;
// create effect
UIBlurEffect *blur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
// add effect to an effect view
UIVisualEffectView *effectView = [[UIVisualEffectView alloc]initWithEffect:blur];
effectView.frame = self.view.frame;
// add the effect view to the image view
[imageView addSubview:effectView];
cell.backgroundView = imageView;
});
});
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
_searchTerm = [[[[_matchCenterData objectAtIndex:indexPath.section] objectForKey:@"Top 3"] objectAtIndex:0]objectForKey:@"Search Term"];
NSLog(@"The search term that was just selected: %@", _searchTerm);
//Set _sectionSelected variable to the section index
self.sectionSelected = indexPath.section;
self.sectionSelectedSearchTerm = _searchTerm;
[self performSegueWithIdentifier:@"MCExpandedSegue" sender:self];
}
In cellForRowAtIndexPath write this line.
This may help u
cell.selectionStyle = UITableViewCellSelectionStyleNone;
inside didSelectRowAtIndexPath method Store index and Reload table view then inside cellForRowAtIndexPath method check 在didSelectRowAtIndexPath方法内部存储索引并重新加载表视图,然后在cellForRowAtIndexPath方法内部进行检查
if (indexPath.row == storedIndex) { 如果(indexPath.row == storedIndex){
cell.backgroundColor = [UIColor clearColor];
} else { }其他{
cell.backgroundColor = [UIColor whiteColor];
} }
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