我想编写一些代码来处理 HTTP 连接失败时的异常。我使用以下代码:
-(void) connection:(NSURLConnection *)connection
didFailWithError: (NSError *)error {
UIAlertView *errorAlert = [[UIAlertView alloc]
initWithTitle: [error localizedDescription]
message: [error localizedFailureReason]
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[errorAlert show];
[errorAlert release];
[activityIndicator stopAnimating];
NSLog (@"Connection Failed with Error");
}
但是当连接失败时,程序就会崩溃。如何让警报弹出而不会导致程序崩溃?