确保故事板中单元格的CellIdentifier ==标识符，两个名称是相同的。希望这对你有用

我昨晚花了几个小时来解决为什么我的编程生成的表崩溃了[myTable setDataSource:self];它可以注释掉并弹出一个空表，但每次我试图访问数据源时都崩溃了;

我在h文件中设置了委托:@interface myViewController: UIViewController

我在我的实现中有数据源代码，仍然BOOM!，每次都崩溃!感谢“xxd”(nr 9):添加那行代码为我解决了这个问题!事实上，我从一个IBAction按钮启动一个表，所以这是我的完整代码:

    - (IBAction)tapButton:(id)sender {

    UIViewController* popoverContent = [[UIViewController alloc]init];

    UIView* popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 300)];
    popoverView.backgroundColor = [UIColor greenColor];
    popoverContent.view = popoverView;

    //Add the table
    UITableView *table = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, 200, 300)         style:UITableViewStylePlain];

   // NEXT THE LINE THAT SAVED MY SANITY Without it the program built OK, but crashed when      tapping the button!

    [table registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Cell"];
    table.delegate=self;
    [table setDataSource:self];
    [popoverView addSubview:table];
    popoverContent.contentSizeForViewInPopover =
    CGSizeMake(200, 300);

    //create a popover controller
    popoverController3 = [[UIPopoverController alloc]
                          initWithContentViewController:popoverContent];
    CGRect popRect = CGRectMake(self.tapButton.frame.origin.x,
                                self.tapButton.frame.origin.y,
                                self.tapButton.frame.size.width,
                                self.tapButton.frame.size.height);


    [popoverController3 presentPopoverFromRect:popRect inView:self.view   permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];



   }


   #Table view data source in same m file

   - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
   {
    NSLog(@"Sections in table");
    // Return the number of sections.
    return 1;
   }

   - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
  {
    NSLog(@"Rows in table");

    // Return the number of rows in the section.
    return myArray.count;
   }

   - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath    *)indexPath
    {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    NSString *myValue;

    //This is just some test array I created:
    myValue=[myArray objectAtIndex:indexPath.row];

    cell.textLabel.text=myValue;
    UIFont *myFont = [ UIFont fontWithName: @"Arial" size: 12.0 ];
    cell.textLabel.font  = myFont;

    return cell;
   }

顺便说一下:如果你想将弹出窗口锚定在IBAction和IBOutlet上，这个按钮必须与IBAction和IBOutlet链接起来。

UIPopoverController *popoverController3在H文件中直接声明在@interface between{}之后

我有同样的问题，有同样的错误，对我来说，它是这样工作的:

[self.tableView registerNib:[UINib nibWithNibName:CELL_NIB_HERE bundle: nil] forCellReuseIdentifier:CELL_IDENTIFIER_HERE];

也许它会对其他人有用。

虽然这个问题相当古老，但还有另一种可能性: 如果您正在使用故事板，您只需在故事板中设置CellIdentifier。

所以如果你的CellIdentifier是"Cell"，只需设置"Identifier"属性:

确保在此之后清理构建。XCode有时在故事板更新方面会有一些问题

Swift 2.0解决方案:

你需要进入你的属性检查器，为你的单元格添加一个名称:

然后你需要让你的标识符与你的出队列匹配，就像这样:

let cell2 = tableView.dequeueReusableCellWithIdentifier("ButtonCell", forIndexPath: indexPath) as! ButtonCell

另外

如果你正在使用nib，你可能需要在cellForRowAtIndexPath中注册你的类:

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {       

    tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "SwitchCell")

    // included for context            
    let cell = tableView.dequeueReusableCellWithIdentifier("SwitchCell", forIndexPath:indexPath) as! SwitchCell

    //... continue    
}

苹果的UITableView类引用说:

Prior to dequeueing any cells, call this method or the registerNib:forCellReuseIdentifier: method to tell the table view how to create new cells. If a cell of the specified type is not currently in a reuse queue, the table view uses the provided information to create a new cell object automatically. If you previously registered a class or nib file with the same reuse identifier, the class you specify in the cellClass parameter replaces the old entry. You may specify nil for cellClass if you want to unregister the class from the specified reuse identifier.

下面是苹果Swift 2.0框架的代码:

// Beginning in iOS 6, clients can register a nib or class for each cell.
// If all reuse identifiers are registered, use the newer -dequeueReusableCellWithIdentifier:forIndexPath: to guarantee that a cell instance is returned.
// Instances returned from the new dequeue method will also be properly sized when they are returned.

@available(iOS 5.0, *)
func registerNib(nib: UINib?, forCellReuseIdentifier identifier: String)

@available(iOS 6.0, *)
func registerClass(cellClass: AnyClass?, forCellReuseIdentifier identifier: String)

如果你要使用自定义静态单元格，只需注释这个方法:

//- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
//    static NSString *CellIdentifier = @"notificationCell";
//    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
//    return cell;
//}

并在storyboard中的Attributes Inspector处给单元格一个标识符。