Question

我有这个标题：

@interface MyBusinessesController : UIViewController

@property (weak, nonatomic) IBOutlet UITableView *businessList;

@property (weak, nonatomic) IBOutlet UILabel *loadingLabel;

@end

我在我的.m文件中有这个：

#import "MyBusinessesController.h"

@interface MyBusinessesController ()

@end

@implementation MyBusinessesController

@synthesize businessList;
@synthesize loadingLabel;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

       NSLog(@"HIDING 1");
    // HIDE THE LIST UNTIL IT LOADS
    self.businessList.hidden=TRUE;
       NSLog(@"HIDING 2");    
}

- (void)viewDidUnload
{
    [self setLoadingLabel:nil];
    [self setBusinessList:nil];
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

@end

当此控制器运行时，两个NSLOG行都会执行，之后会发生异常。

以下是例外：

-[MyBusinessesController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x6a8f330
2012-07-29 21:31:38.355 BusinessPlan[3973:f803] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[MyBusinessesController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x6a8f330'
*** First throw call stack:
(0x13d5022 0x1566cd6 0x13d6cbd 0x133bed0 0x133bcb2 0x1fd06b 0x1ff862 0xad66d 0xad167 0xb0134 0xb4623 0x5dd42 0x13d6e42 0x1d8d679 0x1d97579 0x1d1c4f7 0x1d1e3f6 0x1d1dad0 0x13a999e 0x1340640 0x130c4c6 0x130bd84 0x130bc9b 0x12be7d8 0x12be88a 0x1f626 0x1bfd 0x1b65)

有人能帮我理解这里出了什么问题吗？

谢谢！

Answer 1

您可能已将MyBussinessViewController设置为接口构建器中的数据源，但您未在其中设置数据源方法。您可以通过右键单击界面构建器中的tableview并查看数据源字段的连接来进行检查。

供参考，您需要：

tableView:numberOfRowsInSection:
numberOfSectionsInTableView:
tableView:cellForRowAtIndexPath:

http://developer.apple.com/library/ios/#documentation/uikit/reference/UITableViewDataSource_Protocol/Reference/Reference.html

快乐的编码。

ios - tableView：numberOfRowsInSection ...使用UITableView时NSInvalidArgumentException

1 个答案: