xcode 未调用 cellForRowAtIndexPath
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cellForRowAtIndexPath not being called
提问by Batnom
I have a view that adds another view on top in this manner:
我有一个视图，以这种方式在顶部添加另一个视图：
- (void)showAreaEditView {
NSLog(@"SHOWING AREA EDITOR VIEW");
if (self.thisAreaEditorView == nil) {
// Create View
AreaEditorView *tmpViewController = [[AreaEditorView alloc] initWithNibName:@"AreaEditorView" bundle:nil];
self.thisAreaEditorView = tmpViewController;
[tmpViewController release];
// Hide the back button
self.thisAreaEditorView.navigationItem.hidesBackButton = YES;
}
self.thisAreaEditorView.myInspectionID = self.myInspectionID;
self.thisAreaEditorView.loggedIn = loggedIn;
self.thisAreaEditorView.loggedInGroup = loggedInGroup;
// Slide view up
[self.view addSubview:thisAreaEditorView.view];
CGRect endFrame = CGRectMake(self.view.frame.size.width/2 - thisAreaEditorView.view.frame.size.width/2,
self.view.frame.size.height/2 - thisAreaEditorView.view.frame.size.height/2,
thisAreaEditorView.view.frame.size.width,
thisAreaEditorView.view.frame.size.height);
CGRect startFrame = endFrame; // offscreen source
// new view starts off bottom of screen
startFrame.origin.y += self.view.frame.size.height;
self.thisAreaEditorView.view.frame = startFrame;
// start the slide up animation
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:.6];
thisAreaEditorView.view.frame = endFrame; // slide in
[UIView commitAnimations];
}
I'm sure you can just ignore the slide part, I feel the addSubview is relevant.
我确定您可以忽略幻灯片部分，我觉得 addSubview 是相关的。
Then in thisAreaEditor I have the view with the table and buttons and such. UITableView delegate/datasource is going to File's Owner as normal.
然后在 thisAreaEditor 中，我拥有带有表格和按钮等的视图。UITableView 委托/数据源将照常发送给文件所有者。
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSLog(@"numberOfRowsInSection returning %d", [tableData count]);
[tableData count];
}
This function numberOfRowsInSection returns 4
此函数 numberOfRowsInSection 返回 4
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell...
NSString *thisText = [tableData objectAtIndex:indexPath.row];
cell.textLabel.text = thisText;
NSLog(@"looking at cell %d text:%@", indexPath.row, thisText);
return cell;
}
But cellForRowAtIndexPath never gets called.
但是 cellForRowAtIndexPath 永远不会被调用。
I'm at a loss here, I have no idea how it can seem to work fine but one of the delegate functions simply not be called.
我在这里不知所措，我不知道它是如何正常工作的，但其中一个委托函数根本没有被调用。
I have tried [bigTable reloadData]and so on, the table just never gets populated and no logs from the function output.
我已经尝试过[bigTable reloadData]等等，该表永远不会被填充并且没有来自函数输出的日志。
Thanks in advance.
提前致谢。
回答by NJones
You might have just edited this out, if so I'm sorry, but it looks like you forgot to return tableData's count.
您可能刚刚编辑了它，如果是这样，我很抱歉，但您似乎忘记返回 tableData 的计数。
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
? ? NSLog(@"numberOfRowsInSection returning %d", [tableData count]);
? ? return [tableData count];
}
回答by hellozimi
It seems you're missing UITableViewDelegate.
看来您缺少 UITableViewDelegate。
If you're using Interface Builder, right click the table view outlet and drag both delegateand datasourceto File's Owner.
如果您使用界面生成器中，右键单击表格视图出口和阻力都delegate和datasource到File's Owner。
And if not using Interface Builder add this where you init your tableView
如果不使用 Interface Builder，请在您初始化 tableView 的地方添加它
bigTable.delegate = self;
bigTable.dataSource = self;
Remember to import the UITableViewDelegate and UITableViewDataSource protocols, just as Srikar says.
记住导入 UITableViewDelegate 和 UITableViewDataSource 协议，就像 Srikar 所说的那样。
Hope this is to any help.
希望这对任何帮助。
Cheers!
干杯!
回答by Bijoy Thangaraj
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPathis also not called when the tableview's height is not set.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath未设置 tableview 的高度时也不会调用。
回答by Srikar Appalaraju
Maybe you did not set the tableView delegate as self or the datasource as self. Add this code & see if it works now -
也许您没有将 tableView 委托设置为 self 或将数据源设置为 self。添加此代码并查看它现在是否有效 -
[tableView setDelegate:self];
[tableView setDataSource:self];
Also in your header file inherit these delegates - UITableViewDelegate, UITableViewDataSource
同样在您的头文件中继承这些委托 - UITableViewDelegate, UITableViewDataSource
@interface yourViewController: UIViewController <UITableViewDelegate, UITableViewDataSource>
Hope this helps.
希望这可以帮助。
回答by verma
This is a older link, but I wanted to update this with putting info on how I resolved this issue. For me the issue was the Array to populate the table had 0 rows so cellForRowAtIndexPath was never called. Make sure that the Array you are using to populate the table has data in it.
这是一个较旧的链接，但我想通过提供有关我如何解决此问题的信息来更新此链接。对我来说，问题是用于填充表的 Array 有 0 行，因此从未调用 cellForRowAtIndexPath。确保用于填充表的数组中包含数据。
