将 NSString 转换为 Int 时出现问题

Question

由于某种原因，当我将此 NSString 转换为整数时，我得到一个完全随机（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 debtString 值上在上面的行中，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了债务字符串，但这显然不是真的。

Answer 1

字符串的 int 值高于 int 的最大值。因此它显示 int 的最大值，即 2.147.483.647