iPhone 5 UITableView 不显示
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【中文标题】iPhone 5 UITableView 不显示【英文标题】：iPhone 5 UITableView not displaying 【发布时间】：2015-12-14 16:43:43 【问题描述】：我目前正在开发一个包含许多 UITableViews 的应用程序，我通过在 iPhone 6 上进行测试来创建该应用程序。我最近开始在其他设备上进行测试，我注意到在 iPhone 5 上任何具有多个部分的 UITableView 都会跳过第 0 节，根本不显示它。虽然在我的 iPhone 6 和 iPhone 5s 上它会显示得非常好。下面是一些用于显示我的个人资料部分的 UITableView 的代码。任何帮助将不胜感激。值得一提的是，所有设备均运行 9.1。谢谢。
#pragma mark - UITableViewDataSource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
return 2;
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
if (section == 0)
return 2;
else if (section == 1)
if ([_selectedSection isEqualToString:@"captures"])
if ([_capturesArray count] > 0)
return [_capturesArray count];
else
return 1;
else if ([_selectedSection isEqualToString:@"comments"])
if ([_commentsArray count] > 0)
return [_commentsArray count];
else
return 1;
else if ([_selectedSection isEqualToString:@"followers"])
if ([_followersArray count] > 0)
return [_followersArray count];
else
return 1;
else if ([_selectedSection isEqualToString:@"following"])
if ([_followingArray count] > 0)
return [_followingArray count];
else
return 1;
return 0;
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
if (indexPath == [NSIndexPath indexPathForRow:0 inSection:0])
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"userCell" forIndexPath:indexPath];
return cell;
else if (indexPath == [NSIndexPath indexPathForRow:1 inSection:0])
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"menuCell" forIndexPath:indexPath];
return cell;
else if (indexPath.section == 1)
if ([_selectedSection isEqualToString:@"captures"] && [_capturesArray count] > 0)
// Get Capture
Capture *capture = _capturesArray[indexPath.row];
// Create Cell
NSString *cellID = capture.cellID;
CaptureTableViewCells *cell = (CaptureTableViewCells *)[tableView dequeueReusableCellWithIdentifier:cellID];
if (cell == nil)
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CaptureCells" owner:nil options:nil];
if ([capture.cellID isEqualToString:FeaturedCellID])
cell = (CaptureTableViewCells *)[nib objectAtIndex:0];
else
cell = (CaptureTableViewCells *)[nib objectAtIndex:1];
return cell;
else if ([_selectedSection isEqualToString:@"comments"] && [_commentsArray count] > 0)
else if ([_selectedSection isEqualToString:@"followers"] && [_followersArray count] > 0)
else if ([_selectedSection isEqualToString:@"following"] && [_followingArray count] > 0)
else
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"emptyCell" forIndexPath:indexPath];
// Configure the cell...
return cell;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"userCell" forIndexPath:indexPath];
// Configure the cell...
return cell;
#pragma mark - UITableViewDelegate
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
if (indexPath == [NSIndexPath indexPathForRow:0 inSection:0])
UIImageView *profileImageView = (UIImageView *)[cell viewWithTag:10];
profileImageView.layer.borderColor = [self uicolorFromHex:0xffd700].CGColor;
profileImageView.layer.borderWidth = 5;
profileImageView.layer.cornerRadius = profileImageView.frame.size.width/2;
profileImageView.layer.masksToBounds = YES;
else if (indexPath == [NSIndexPath indexPathForRow:1 inSection:0])
// Get Buttons
_capturesMenuButton = (UIButton *)[cell viewWithTag:1];
_commentsMenuButton = (UIButton *)[cell viewWithTag:2];
_followersMenuButton = (UIButton *)[cell viewWithTag:3];
_followingMenuButton = (UIButton *)[cell viewWithTag:4];
// Set Text Of Buttons
if ([_capturesArray count] > 0)
[_capturesMenuButton setTitle:[NSString stringWithFormat:@"%lu", (unsigned long)[_capturesArray count]] forState:UIControlStateNormal];
// Set Buttons Selector
[_capturesMenuButton addTarget:self action:@selector(capturesMenuButtonTouchUpInside:) forControlEvents:UIControlEventTouchUpInside];
[_commentsMenuButton addTarget:self action:@selector(commentsMenuButtonTouchUpInside:) forControlEvents:UIControlEventTouchUpInside];
[_followersMenuButton addTarget:self action:@selector(followersMenuButtonTouchUpInside:) forControlEvents:UIControlEventTouchUpInside];
[_followingMenuButton addTarget:self action:@selector(followingMenuButtonTouchUpInside:) forControlEvents:UIControlEventTouchUpInside];
else if (indexPath.section == 1)
if ([_selectedSection isEqualToString:@"captures"])
if ([_capturesArray count] > 0)
// Has Captures
CaptureTableViewCells *capCell = (CaptureTableViewCells *)cell;
// Get Capture At Index
Capture *capture = _capturesArray[indexPath.row];
capCell.capture = capture;
NSURLRequest *request = [NSURLRequest requestWithURL:capture.captureImage.imageURL];
UIImage *placeholderImage = [UIImage imageNamed:@"Overlay"];
__weak CaptureTableViewCells *weakCell = capCell;
[capCell.captureImageView setImageWithURLRequest:request
placeholderImage:placeholderImage
success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image)
weakCell.captureImageView.image = image;
weakCell.capture.captureImage.image = weakCell.captureImageView.image;
[weakCell.activityIndicator stopAnimating];
[weakCell setNeedsLayout];
failure:nil];
else
// No Captures
UILabel *label = (UILabel *)[cell viewWithTag:1];
label.text = @"You have no Captures.";
else if ([_selectedSection isEqualToString:@"comments"])
if ([_commentsArray count] > 0)
// Has Captures
else
// No Captures
UILabel *label = (UILabel *)[cell viewWithTag:1];
label.text = @"You have no comments.";
else if ([_selectedSection isEqualToString:@"followers"])
if ([_followersArray count] > 0)
// Has Captures
else
// No Captures
UILabel *label = (UILabel *)[cell viewWithTag:1];
label.text = @"You have no followers.";
else if ([_selectedSection isEqualToString:@"following"])
if ([_followingArray count] > 0)
// Has Captures
else
// No Captures
UILabel *label = (UILabel *)[cell viewWithTag:1];
label.text = @"You are not following anyone.";
// Remove seperator inset
if ([cell respondsToSelector:@selector(setSeparatorInset:)])
[cell setSeparatorInset:UIEdgeInsetsZero];
// Prevent the cell from inheriting the Table View's margin settings
if ([cell respondsToSelector:@selector(setPreservesSuperviewLayoutMargins:)])
[cell setPreservesSuperviewLayoutMargins:NO];
// Explictly set your cell's layout margins
if ([cell respondsToSelector:@selector(setLayoutMargins:)])
[cell setLayoutMargins:UIEdgeInsetsZero];
// Setup Style For Cell
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
if (indexPath == [NSIndexPath indexPathForRow:0 inSection:0])
return 208;
else if (indexPath == [NSIndexPath indexPathForRow:1 inSection:0])
return 72;
else if (indexPath.section == 1)
if ([_selectedSection isEqualToString:@"captures"])
if ([_capturesArray count] > 0)
Capture *capture = _capturesArray[indexPath.row];
return capture.cellHeight;
else
return self.view.frame.size.height - 280 - self.navigationController.navigationBar.frame.size.height - self.tabBarController.tabBar.frame.size.height;
else if ([_selectedSection isEqualToString:@"comments"])
if ([_commentsArray count] > 0)
Capture *capture = _commentsArray[indexPath.row];
return capture.cellHeight;
else
return self.view.frame.size.height - 280 - self.navigationController.navigationBar.frame.size.height - self.tabBarController.tabBar.frame.size.height;
else if ([_selectedSection isEqualToString:@"followers"])
if ([_followersArray count] > 0)
return 0;
else
return self.view.frame.size.height - 280 - self.navigationController.navigationBar.frame.size.height - self.tabBarController.tabBar.frame.size.height;
else if ([_selectedSection isEqualToString:@"following"])
if ([_followingArray count] > 0)
return 0;
else
return self.view.frame.size.height - 280 - self.navigationController.navigationBar.frame.size.height - self.tabBarController.tabBar.frame.size.height;
return 0;
更新 所以我注释掉了 tableView: heightForRowAtIndexPath: 中的所有内容，并为每个单元格的高度返回了 100。现在我的第 0 节单元格可见。当我添加日志语句以查看会发生什么时，这就是我得到的。
这是我的代码：
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
NSLog(@"IndexPath: %ld, %ld", (long)indexPath.section, (long)indexPath.row);
if (indexPath == [NSIndexPath indexPathForRow:0 inSection:0])
NSLog(@"Setting Height");
return 208;
这是我的日志：
2015-12-14 13:27:21.678 Captures[324:42956] IndexPath: 0, 0
2015-12-14 13:27:21.678 Captures[324:42956] IndexPath: 0, 1
如您所见，它跳过了设置第 0 行第 0 行的高度。在我的 iPhone 6 和 iPhone5s 上，这不会发生。有谁知道为什么会这样？
【问题讨论】：
您是否检查了视图调试器，如果该部分移动到您看不到的最顶部？ 您是在情节提要还是在代码中创建表格视图？你在使用自动布局吗？ @Mr.T 我可以在屏幕顶部看到我的第 0 节标题，下面什么都没有。它只是跳到第 1 节。我对视图调试器不太熟悉。我做了调试->查看调试->捕获视图层次结构。打开后，我单击“显示剪辑的内容”，据我所知，第 0 节标题上方没有任何内容。 @AdeelMiraj 我正在使用带有自动布局的情节提要。 您是否尝试记录每个单元格的高度？ 【参考方案1】：我创建了一个小型测试应用来确认：您不应该像在代码中那样使用== 运算符来比较NSIndexPathobjects。虽然它似乎在我的 iPhone 6 模拟器上运行，但它在 iPhone 5 模拟器上不运行。
您应该使用compare: 方法或检查NSIndexPath 的各个属性，而不是检查两个对象是否相等。
根据 Apple 的文档，compare: 似乎是首选：Comparing Index Paths
if([indexPath compare:[NSIndexPath indexPathForItem:0 inSection:0]] == NSOrderedSame)
// do something
如果您不一定关心section 和row 属性，也可以检查NSIndexPath 的各个属性。
if(indexPath.row == 0 && indexPath.section == 0)
// do something
【讨论】：
谢谢@Stonz2 我做了你建议的改变，效果很好。以上是关于iPhone 5 UITableView 不显示的主要内容，如果未能解决你的问题，请参考以下文章
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