[英]UIImageView in UITableViewCell not showing up until cell is being reused
I am having a weird issue with a custom UITableViewCell implementation that I have: 我有一个自定义UITableViewCell实现的怪异问题:
- (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
ProfileTableViewCell *cell = (ProfileTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[ProfileTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
MyStory *myStory = (SavedStory *)[fetchedResultsController.fetchedObjects objectAtIndex:indexPath.row];
[cell setupCellViewWithSavedStory:myStory];
return cell;
}
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithPulseStyle:PNRTableViewCellAccessoryDefault reuseIdentifier:@"SavedStories"];
if (self) {
storyImageView_ = [[UIImageView alloc] initWithFrame:CGRectMake(kPadding, kPadding, kImageSize, kImageSize)];
storyImageView_.layer.borderWidth = 2.0;
storyImageView_.layer.borderColor = [UIColor whiteColor].CGColor;
storyTitleLabel_ = [[UILabel alloc] initWithFrame:CGRectMake(storyImageView_.frameRight + kPadding*1.5, storyImageView_.frameY, self.bounds.size.width - storyImageView_.frameWidth - 4*kPadding, 0)];
storyTitleLabel_.numberOfLines = 0;
storyTitleLabel_.lineBreakMode = UILineBreakModeClip;
storyTitleLabel_.font = [UIFont fontWithName:kProximaNovaBold size:14];
storyTitleLabel_.textColor = [UIColor whiteColor];
storyTitleLabel_.backgroundColor = [UIColor clearColor];
storyPublisherLabel_ = [[UILabel alloc] initWithFrame:CGRectMake(storyTitleLabel_.frameX, storyTitleLabel_.frameHeight, storyTitleLabel_.frameWidth, 50)];
storyPublisherLabel_.numberOfLines = 1;
storyPublisherLabel_.font = [UIFont fontWithName:kProximaNova size:11];
storyPublisherLabel_.textColor = [UIColor colorWithWhite:140/255.f alpha:1.0];
storyPublisherLabel_.backgroundColor = [UIColor clearColor];
[self.contentView addSubview:storyImageView_];
[self.contentView addSubview:storyTitleLabel_];
[self.contentView addSubview:storyPublisherLabel_];
}
return self;
}
-(void)setupCellViewWithSavedStory:(MyStory *) myStory
{
if (myStory.imageState == StoryImageAvailableOnDisk) {
storyImageView_.hidden = NO;
storyImageView_.image = myStory.image;
}
else {
storyImageView_.image = nil;
storyImageView_.hidden = YES;
}
CGSize titleSize = [myStory.title sizeWithFont:storyTitleLabel_.font constrainedToSize:CGSizeMake(storyTitleLabel_.frameWidth, kImageSize - kPadding) lineBreakMode:storyTitleLabel_.lineBreakMode];
[storyTitleLabel_ setFrameHeight:titleSize.height];
[storyTitleLabel_ setText:savedStory.title];
[storyPublisherLabel_ setText:savedStory.domain];
[self setNeedsLayout];
}
But for some reason is that I can't see image until I scroll down and scroll back up again. 但是由于某些原因,直到向下滚动并再次向上滚动才能看到图像。 In other words the image is reused then I can see the image.
换句话说,图像被重用,然后我可以看到图像。 All of the label text is showing just fine, it's just the image.
所有标签文本显示都很好,只是图像。 Any idea why?
知道为什么吗?
Have you tried this? 你有尝试过吗?
if (cell == nil) {
cell = [[ProfileTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
MyStory *myStory = (SavedStory *)[fetchedResultsController.fetchedObjects objectAtIndex:indexPath.row];
[cell setupCellViewWithSavedStory:myStory];
}
Try adding this code: 尝试添加以下代码:
-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
MyStory *myStory = (SavedStory *)[fetchedResultsController.fetchedObjects objectAtIndex:indexPath.row];
[cell setupCellViewWithSavedStory:myStory];
}
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