iPhone模拟器继续无法加载带有错误sigabrt的网页

我正在从头开始构建一个web浏览器，除了最重要的东西外，几乎所有东西都能正常工作。浏览器会出现错误sigabrt，虽然我对iPhone编程还不熟悉，但我很确定这意味着我没有正确发送URL

这是通过按下按钮加载网页的代码

- (IBAction)getURLButton:(NSString *)aString {
NSURL *URL = [NSURL URLWithString:aString];
NSURLRequest *URLRequest = [NSURLRequest requestWithURL:URL];
BOOL load = [addressBar webView: (goButton) shouldStartLoadWithRequest:URLRequest navigationType:UIWebViewNavigationTypeFormSubmitted];
if (load) {
    error = nil;
    [goButton loadRequest:URLRequest];
    //currentURLString = [UIWebView stringByEvaluatingJavaScriptFromString:@"document.location.href"];
    //It's not in Xcode? It continues to get an error after I write the above statement.
} else {
    NSString *message = NSURLErrorFailingURLErrorKey;
    NSLog(@"%@",message);
}

}

这是错误消息：

2013-02-14 16:49:28.724 WebBrowser[1265:c07] -[ViewController getURL:]: unrecognized selector sent to instance 0x716f1d0
2013-02-14 16:49:28.727 WebBrowser[1265:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ViewController getURL:]: unrecognized selector sent to instance 0x716f1d0'

我知道哪里有错误，只是不知道在哪里。帮忙

 2013-02-14 16:49:28.724 WebBrowser[1265:c07] -[ViewController getURL:]: unrecognized selector sent to instance 0x716f1d0
 2013-02-14 16:49:28.727 WebBrowser[1265:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ViewController getURL:]: unrecognized selector sent to instance 0x716f1d0'

如果看到异常，则调用getURL:其中方法名为getURLButton: