转载自：http://blog.csdn.net/remote_roamer/article/details/7105776

  1. 抛出错误的代码
    [cpp] view plaincopy
    1. //如果返回的报文是错误信息，则抛出错误  
    2.    if([outParams count] <= 0)  
    3.    {  
    4.        [NSException raise:@"WebService error" format:@"%@", returnJson4SOAP];  
    5.    }  
  2. 在调用中捕获错误代码
    [cpp] view plaincopy
    1. //从soap 信息中解析出CusotmerDetail 对象  
    2.     @try  
    3.     {  
    4.         customerDetail = [[[SoapRtnJsonParser alloc] init] parse2CustomerDtail:[returnSoapXML dataUsingEncoding:NSUTF8StringEncoding]];  
    5.     }@catch (NSException * e) {  
    6.         NSLog(@"Exception: %@", e);  
    7.         UIAlertView * alert =  
    8.         [[UIAlertView alloc]  
    9.          initWithTitle:@"错误"  
    10.          message: [[NSString alloc] initWithFormat:@"%@",e]  
    11.          delegate:self  
    12.          cancelButtonTitle:nil  
    13.          otherButtonTitles:@"OK", nil];   
    14.         [alert show];  
    15.         [alert release];  
    16.         return;  
    17.     }