本文转载至 http://blog.csdn.net/remote_roamer/article/details/7105776

1. 抛出错误的代码
   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
   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. }