在ios开发中使用 try 和 catch 来捕获错误。

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

抛出错误的代码

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//如果返回的报文是错误信息，则抛出错误

if([outParams count] <= 0)

{

[NSException raise:@"WebService error" format:@"%@", returnJson4SOAP];

}

在调用中捕获错误代码

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//从soap 信息中解析出CusotmerDetail 对象

@try

{

customerDetail = [[[SoapRtnJsonParser alloc] init] parse2CustomerDtail:[returnSoapXML dataUsingEncoding:NSUTF8StringEncoding]];

}@catch (NSException * e) {

NSLog(@"Exception: %@", e);

UIAlertView * alert =

[[UIAlertView alloc]

initWithTitle:@"错误"

message: [[NSString alloc] initWithFormat:@"%@",e]

delegate:self

cancelButtonTitle:nil

otherButtonTitles:@"OK", nil];

[alert show];

[alert release];

return;

}