终止应用程序，由于未捕获的异常'NSRangeException' - [__ NSArrayI objectAtIndex：]：索引1超越界限[0..0]'

Question

我有此代码，用于检查用户是否已验证完成在应用程序上注册：

-(void)handleVerify:(UITapGestureRecognizer *)recognizer{ 
    __block BOOL foundError = false; 
    UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite]; 
    UIView *transparentView = [[UIView alloc] init]; 
    transparentView.frame = self.view.frame; //Provide frame of right side view. 
    transparentView.alpha = 0.5; //To provide transparent look and feel. 
    transparentView.backgroundColor = [UIColor blackColor]; 
    [self.view addSubview:transparentView]; 

    //activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite]; 
    activityIndicator.center = CGPointMake(transparentView.frame.size.width/2, transparentView.frame.size.height/2); 
    [transparentView addSubview:activityIndicator]; 
    [activityIndicator startAnimating]; 

    if(textfieldVerifyEmail.text.length > 0){ 
     labelErrorVerfiyEmail.hidden = YES; 
    }else{ 
     foundError = true; 
     labelErrorVerfiyEmail.hidden = NO; 
    } 

    if(textfieldVerifyNumber.text.length > 0){ 
     labelErrorVerifyNumber.hidden = YES; 
    }else{ 
     foundError = true; 
     labelErrorVerifyNumber.hidden = NO; 
    } 

    if(!foundError){ 
     dispatch_queue_t concurrentQueue2 = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); 

     // 3) Load picker in background 
     dispatch_async(concurrentQueue2, ^{ 
      NSString *myRequestString = [NSString stringWithFormat:@"email=%@&ver=%@", textfieldVerifyEmail.text,textfieldVerifyNumber.text]; 

      NSString *response = [self setupPhpCall:myRequestString :@"checkUserVerification.php"]; 
      dispatch_async(dispatch_get_main_queue(), ^{ 
       if(response.length > 0){ 
        NSArray *items = [response componentsSeparatedByString:@"|~|"]; 
        NSString *ver =[items objectAtIndex:0]; 
        NSString *idUser =[items objectAtIndex:1]; 
        if([ver isEqualToString:@"verified"]){ 
         textfieldVerifyNumber.text = @""; 
         textfieldVerifyEmail.text = @""; 
         [activityIndicator stopAnimating]; 
         [transparentView removeFromSuperview]; 
         [activityIndicator removeFromSuperview]; 
         UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"REGISTERED" message:@"You are now Registered" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil, nil]; 
         [alert show]; 

         userID = [idUser intValue]; 
         [viewCreds removeFromSuperview]; 
         [viewCredsRegister removeFromSuperview]; 
         [viewCredsSignin removeFromSuperview]; 
         [viewCredsVerify removeFromSuperview]; 

         [self setupHeader]; 
         [self setupNavigation]; 
         [self setupFooter]; 
         [self setupFooterNavigation]; 
         [self switchView:7]; 
         [self switchView:1]; 
        }else{ 
         [activityIndicator stopAnimating]; 
         [transparentView removeFromSuperview]; 
         [activityIndicator removeFromSuperview]; 

         UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"VERIFICATION INVALID" message:@"Our records show that the Verification Number is incorrect, please try again or contact support@hugt.co.uk" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil, nil]; 
         [alert show]; 
        } 
       }else{ 
        [activityIndicator stopAnimating]; 
        [transparentView removeFromSuperview]; 
        [activityIndicator removeFromSuperview]; 

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"SERVER ERROR" message:@"Server not Responding, please try back later..." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil, nil]; 
        [alert show]; 
       } 
      }); 
     }); 
    }else{ 
     [activityIndicator stopAnimating]; 
     [transparentView removeFromSuperview]; 
     [activityIndicator removeFromSuperview]; 
    } 
} 

但我只要我点击确认收到此错误按钮：

[1649:65950] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayI objectAtIndex:]: index 1 beyond bounds [0 .. 0]' 
*** First throw call stack: 
(
    0 CoreFoundation      0x00e2c746 __exceptionPreprocess + 182 
    1 libobjc.A.dylib      0x006a2a97 objc_exception_throw + 44 
    2 CoreFoundation      0x00d0dcb2 -[__NSArrayI objectAtIndex:] + 210 
    3 InstantForum      0x000944ab __31-[ViewController handleVerify:]_block_invoke_2 + 203 
    4 libdispatch.dylib     0x052fc5ea _dispatch_call_block_and_release + 15 
    5 libdispatch.dylib     0x0531ebef _dispatch_client_callout + 14 
    6 libdispatch.dylib     0x053046bb _dispatch_main_queue_callback_4CF + 993 
    7 CoreFoundation      0x00d858ee __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 14 
    8 CoreFoundation      0x00d435f0 __CFRunLoopRun + 2256 
    9 CoreFoundation      0x00d42a5b CFRunLoopRunSpecific + 443 
    10 CoreFoundation      0x00d4288b CFRunLoopRunInMode + 123 
    11 GraphicsServices     0x047682c9 GSEventRunModal + 192 
    12 GraphicsServices     0x04768106 GSEventRun + 104 
    13 UIKit        0x013ff0b6 UIApplicationMain + 1526 
    14 InstantForum      0x00112e9a main + 138 
    15 libdyld.dylib      0x05349ac9 start + 1 
) 
libc++abi.dylib: terminating with uncaught exception of type NSException 
(Recorded Frame) 

在此行的代码中出现的错误：

dispatch_async(dispatch_get_main_queue(), ^{ 

Answer 1

在致电-objectAtIndex之前检查您的NSArray *items = [response componentsSeparatedByString:@"|~|"];的计数。

您可能失败-componentsSeparatedByString。你确定@"|~|"是在字符串中吗？