json解析失败

2
JSON解析器解析失败判断

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
[connection release];

NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
[responseData release];

NSError *error;
SBJSON *json = [[SBJSON new] autorelease];
NSArray *luckyNumbers = [json objectWithString:responseString error:&error];
[responseString release];

if (luckyNumbers == nil)
label.text = [NSString stringWithFormat:@"JSON parsing failed: %@", [error localizedDescription]];
else {
NSMutableString *text = [NSMutableString stringWithString:@"Lucky numbers:\n"];

for (int i = 0; i <; [luckyNumbers count]; i++)
[text appendFormat:@"%@\n", [luckyNumbers objectAtIndex:i]];

label.text = text;
}
}