按下按钮后加载表格视图笔尖 [英] Loading a table view nib after button push

问题描述

我已经使用以下代码在导航栏中添加了一个按钮，按下该按钮将调用showCountries方法:

I have used the following code to add a button to my navigation bar that when pressed will call the method showCountries:

    UIBarButtonItem *countriesButton = [[UIBarButtonItem alloc] initWithTitle:@"Countries" style: UIButtonTypeRoundedRect target:self action:@selector(showCountries:)];
self.navigationItem.leftBarButtonItem = countriesButton;
[countriesButton release];  

现在可以正常工作了，该按钮将出现，按此按钮将按计划进入showCountries方法.

Now this works, the button appears and when pressed goes to the showCountries method as planned.

显示国家/地区方法需要做的是加载一个新的表格视图，其中包含一个错误国家/地区列表(目前位于一个数组中).

What the show countries method needs to do is load a new table view containing a list of err countries (which at the moment are in an array).

为此，我尝试了以下代码:

To do this I have tried the following code:

    UIViewController *controller = [[UIViewController alloc] initWithNibName:@"countriesViewController" bundle:nil];

[self.navigationController pushViewController:controller animated:YES];

一切似乎都可以正常编译，但是使用时，控制台中会出现以下错误，并导致应用崩溃:

All seems to compile fine but when used the following error appears in the console and boom the app crashes:

2010-06-21 18:09:02.076增值税Pro [788:207] *-[UIViewController tableView:numberOfRowsInSection:]:无法识别的选择器已发送到实例0x12a920 2010-06-21 18:09:02.082 Vat Pro [788:207] * 由于未捕获的异常'NSInvalidArgumentException'终止了应用程序，原因:'***-[UIViewController tableView:numberOfRowsInSection:]:无法识别的选择器已发送到实例0x12a920' 2010-06-21 18:09:02.088增值税Pro [788:207]

2010-06-21 18:09:02.076 Vat Pro[788:207] * -[UIViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x12a920 2010-06-21 18:09:02.082 Vat Pro[788:207] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UIViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x12a920' 2010-06-21 18:09:02.088 Vat Pro[788:207]

我已经挠头2天了，请讨价还价，请告诉我.

I have been scratching my head for 2 days now so pleeeeease if you can spot my mistake please tell me.

我还尝试加载普通的nib文件，效果很好.

I also tried loading a plain nib file and this worked fine.

推荐答案

是-我发现了问题.这是因为我从第一个内部声明了第二个视图控制器，然后释放了它.此后，我将其移至我的应用程序代表，该代表已解决了该问题.

Yea - I found the problem. It was because I was declaring the 2nd view controller from within the first and then releasing it. I have since moved this to my app delegate which has resolved the problem.

我创建了一个测试项目，演示了其他任何人都认为有用的项目. 链接文本

I have created a test project demonstrating this should anyone else find this useful. link text

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