Use try and catch to catch errors in iOS development.

This article reprinted to http://blog.csdn.net/remote_roamer/article/details/7105776

1. The code that throws the error
   [CPP]View Plaincopy < param name= "wmode" value= "Transparent" >
   1. Throws an error if the returned message is an error message
   2. if ([outparams Count] <= 0)
   3. {
   4. [NSException raise:@"WebService error" format:@"%@", Returnjson4soap];
   5. }
2. Capturing the error code in the call
   [CPP]View Plaincopy
   2. Parsing the Cusotmerdetail object from the SOAP message
   4. @Try
   6. {
   8. Customerdetail = [[[Soaprtnjsonparser alloc] init] parse2customerdtail:[returnsoapxml datausingencoding: Nsutf8stringencoding]];
   10. }@catch (NSException * e) {
   12. NSLog (@"Exception:%@", e);
   14. Uialertview * Alert =
   16. [[Uialertview Alloc]
   18. initwithtitle:@"Error"
   20. Message: [[NSString alloc] initwithformat:@"%@", E]
   22. Delegate:self
   24. Cancelbuttontitle:nil
   26. otherbuttontitles:@"OK", nil];
   28. [Alert show];
   30. [Alert release];
   32. return;
   34. }