我最近更新到了Xcode的最新版本，现在我正在见证我桌子中细胞高度的一些奇怪行为。在模拟器和设备中使用iOS7.0很好，但在更新到iOS7.1之后，问题就出现了。 iOS7.1设备上没有出现此问题。更新后没有代码更改。
基本上，细胞最初以正确的高度渲染。向下滚动时，单元格将从视图中完全消失，但在向上滚动后重新出现时，高度已更改约20px。真正奇怪的部分是当再次向下滚动时，在视图底部附近，单元格将高度更改为正确的指定高度。滚动时，它会逐渐跳跃20px（大约）。
单元格高度的代码如下。视图控制器中没有其他代码可以访问/编辑单元格高度。
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [self tableView:tableView cellForRowAtIndexPath:indexPath];
CGRect frame = cell.frame;
return frame.size.height;
}
有没有其他人经历过这一点，我在Google上搜索得非常努力，但空手而归。我真的需要解决这个问题，因为我的客户需要尽快上传应用程序。希望这一切都有道理。
编辑1：代码
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *simpleTableIdentifier;
NSLog(@"index %d", indexPath.row);
if (indexPath.row == (rowCount -1)){
simpleTableIdentifier = @"moreCellAuto";
}else{
simpleTableIdentifier = @"homeCell";
homeReel = [searchResults objectAtIndex:indexPath.row];
//NSLog(@"crash");
}
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil){
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
if([simpleTableIdentifier isEqualToString:@"homeCell"]){
[vidIndex addObject:[homeReel objectForKey:@"VID"]];
[refIndex addObject:[homeReel objectForKey:@"ref"]];
[likeIndex addObject:[homeReel objectForKey:@"likes"]];
[userIndex addObject:[homeReel objectForKey:@"UID"]];
[urlIndex addObject:[homeReel objectForKey:@"URL"]];
[siteIndex addObject:[homeReel objectForKey:@"site"]];
if((NSNull *)[homeReel objectForKey:@"thumb"] != [NSNull null]){
[thumbIndex addObject:[homeReel objectForKey:@"thumb"]];
}else {
[thumbIndex addObject:@""];
}
NSString* title = [homeReel objectForKey:@"title"];
NSString* URL = [homeReel objectForKey:@"ref"];
NSString* postdate = [homeReel objectForKey:@"postdate"];
NSString* userName = [homeReel objectForKey:@"username"];
NSString* likes =[homeReel objectForKey:@"likes"];
NSString* commentsCount =[homeReel objectForKey:@"comment_count"];
NSString* userSub = [homeReel objectForKey:@"userSub"];
NSString* reposts = [homeReel objectForKey:@"reposts"];
NSString* isFeat = [homeReel objectForKey:@"is_featured"];
NSString* type = [homeReel objectForKey:@"type"];
NSString* watchType = [homeReel objectForKey:@"watchType"];
NSString* imageName = [homeReel objectForKey:@"image"];
UILabel *postedBy = (UILabel *)[cell viewWithTag:165];
NSString *postedByText;
if([type isEqualToString:@"featured"]){
postedByText = @"Vindl featured video";
} else {
if([displayType isEqualToString:@"latest"]){
postedByText = [NSString stringWithFormat:@"Posted by %@ Watched by %@", userName, userSub];
} else if ([displayType isEqualToString:@"friend"]){
if (watchType != [NSNull null]){
if([watchType isEqualToString:@"l"]){
postedByText = [NSString stringWithFormat:@"Posted by %@ Liked by %@", userName, userSub];
}else if([watchType isEqualToString:@"c"]){
postedByText = [NSString stringWithFormat:@"Posted by %@ Commented on by %@", userName, userSub];
}
}
} else {
postedByText = [NSString stringWithFormat:@"Posted by %@", userName];
}
}
postedBy.text = postedByText;
postedBy.layer.shadowColor = [[UIColor blackColor] CGColor];
postedBy.layer.shadowOffset = CGSizeMake(0.0f, 1.0f);
postedBy.layer.shadowOpacity = 1.0f;
postedBy.layer.shadowRadius = 1.0f;
UILabel *labelPosted = (UILabel *)[cell viewWithTag:101];
labelPosted.layer.shadowColor = [[UIColor blackColor] CGColor];
labelPosted.layer.shadowOffset = CGSizeMake(0.0f, 1.0f);
labelPosted.layer.shadowOpacity =1.0f;
labelPosted.layer.shadowRadius = 1.0f;
labelPosted.text = [adVC makeDate:postdate];
UILabel *labelTitle = (UILabel *)[cell viewWithTag:100];
labelTitle.text = title;
labelTitle.layer.shadowColor = [[UIColor blackColor] CGColor];
labelTitle.layer.shadowOffset = CGSizeMake(0.0f, 1.0f);
labelTitle.layer.shadowOpacity =1.0f;
labelTitle.layer.shadowRadius = 1.0f;
UILabel *labelLikes = (UILabel *)[cell viewWithTag:103];
if([likes isEqualToString:@"1"]){
labelLikes.text = [NSString stringWithFormat:@"%@ Like", likes];
}else{
labelLikes.text = [NSString stringWithFormat:@"%@ Likes", likes];
}
labelLikes.layer.shadowColor = [[UIColor blackColor] CGColor];
labelLikes.layer.shadowOffset = CGSizeMake(0.0f, 1.0f);
labelLikes.layer.shadowOpacity =1.0f;
labelLikes.layer.shadowRadius = 1.0f;
UILabel *labelComCount = (UILabel *)[cell viewWithTag:104];
if([commentsCount isEqualToString:@"1"]){
labelComCount.text = [NSString stringWithFormat:@"%@ Comment", commentsCount];
}else{
labelComCount.text = [NSString stringWithFormat:@"%@ Comments", commentsCount];
}
labelComCount.layer.shadowColor = [[UIColor blackColor] CGColor];
labelComCount.layer.shadowOffset = CGSizeMake(0.0f, 1.0f);
labelComCount.layer.shadowOpacity =1.0f;
labelComCount.layer.shadowRadius = 1.0f;
UILabel *labelReposts = (UILabel *)[cell viewWithTag:106];
if([reposts isEqualToString:@"1"]){
labelReposts.text = [NSString stringWithFormat:@"%@ Repost", reposts];
}else{
labelReposts.text = [NSString stringWithFormat:@"%@ Reposts", reposts];
}
labelReposts.layer.shadowColor = [[UIColor blackColor] CGColor];
labelReposts.layer.shadowOffset = CGSizeMake(0.0f, 1.0f);
labelReposts.layer.shadowOpacity =1.0f;
labelReposts.layer.shadowRadius = 1.0f;
UIButton *buttonCom = (UIButton *)[cell viewWithTag:111];
[buttonCom addTarget:self action:@selector(checkButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
//VID PREVIEW IMAGES
NSString *identifierV = URL;
UIImageView *cellImg = (UIImageView *)[cell viewWithTag:144];
if ([cachedImagesVid objectForKey:identifierV] != nil){
cellImg.image = [cachedImagesVid valueForKey:identifierV];
} else {
char const * s = [identifierV UTF8String];
dispatch_queue_t queue = dispatch_queue_create(s, 0);
dispatch_async(queue, ^{
NSString *urlVid = [thumbIndex objectAtIndex:indexPath.row];
UIImage *imgVid = nil;
NSData *dataVid = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:urlVid]];
imgVid = [[UIImage alloc] initWithData:dataVid];
dispatch_async(dispatch_get_main_queue(), ^{
[cachedImagesVid setValue:imgVid forKey:identifierV];
cellImg.image = [cachedImagesVid valueForKey:identifierV];
});
});
}
//USER IMAGES
UIImageView *profileImage = (UIImageView *)[cell viewWithTag:112];
if([type isEqualToString:@"featured"]){
profileImage.image = [UIImage imageNamed:@"Featured-icon.png"];
} else {
NSString *identifier = userName;
if ([cachedImages objectForKey:identifier] != nil){
profileImage.image = [cachedImages valueForKey:identifier];
} else {
char const * s = [identifier UTF8String];
dispatch_queue_t queue = dispatch_queue_create(s, 0);
dispatch_async(queue, ^{
NSString *url = [NSString stringWithFormat:@"http://vindl.com/profiles/%@", imageName];
UIImage *img = nil;
NSData *data = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:url]];
img = [[UIImage alloc] initWithData:data];
dispatch_async(dispatch_get_main_queue(), ^{
[cachedImages setValue:img forKey:identifier];
profileImage.image = [cachedImages valueForKey:identifier];
});
});
}
}
UIView *bView1 = (UIView *)[cell viewWithTag:130];
bView1.layer.cornerRadius = 3;
bView1.layer.masksToBounds = YES;
UIView *bView2 = (UIView *)[cell viewWithTag:131];
bView2.layer.cornerRadius = 3;
bView2.layer.masksToBounds = YES;
UIView *bView3 = (UIView *)[cell viewWithTag:132];
bView3.layer.cornerRadius = 3;
bView3.layer.masksToBounds = YES;
UIView *bView4 = (UIView *)[cell viewWithTag:133];
bView4.layer.cornerRadius = 3;
bView4.layer.masksToBounds = YES;
}
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
[actInd stopAnimating];
return cell;
}
答案 0 :(得分：0)
对于在iOS8中遇到类似问题的任何人，请记住您不需要实现heightForRowAtIndexPath。 iOS 8让这非常容易，而配置你的单元格只需设置
如果您使用可用的单元格样式，则numberOfLines = 0。
对于自定义单元格，使用自动布局和setTranslatesAutoresizingMaskIntoConstraints（false） 如果您有UILabel，则numberOfLines = 0。