NSString *name = @"哈哈哈哈";
name = nil;
@try
{
NSDictionary *dict = @{@"name":name};
}@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;
}