目标c -问题转换NSString到Int

Question

由于某种原因，当我将这个NSString转换为整数时，我得到了一个完全随机(但一致)的数字。

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    // do something with the data
    // receivedData is declared as a method instance elsewhere
    NSLog(@"Succeeded! Received %d bytes of data",[receivedData length]);
    // release the connection, and the data object
    [connection release];
    debtString = [[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding];
    NSLog(@"String form: %@", debtString);
    [receivedData release];
    int debtInt = [debtString intValue];
    NSLog(@"Integer form: %i", debtInt);
}

，这是我的控制台输出:

2011-07-19 11:43:18.319 National Debt[50675:207] Succeeded! Received 14 bytes of data
2011-07-19 11:43:18.320 National Debt[50675:207] String form: 14342943000000
2011-07-19 11:43:18.320 National Debt[50675:207] Integer form: 2147483647

如果我在NSLog(@"Integer form: %i", debtInt);行上放置一个断点，并将鼠标悬停在上面行的debtString值上，则有一个无效的摘要。我能想到发生这种情况的唯一原因是我在转换之前释放debtString，但这显然不是真的。

Answer 1

字符串的整型值大于整型值的最大值。因此，它显示int的最大值为2.147.483.647