可以使用 NSString 的 getCString：maxLength：encoding： 方法，如下所示：

You can use NSString's getCString:maxLength:encoding: method, like this:

char converted[([string length] + 1)];
[string getCString:converted maxLength:([string length] + 1) encoding: NSISOLatin1StringEncoding];

NSLog(@"%s", converted);

一旦你有了这个，你可以重新初始化一个 NSString 类方法：

Once you have this, you can then re-initialize an NSString instance from that same encoding using the stringWithCString:encoding: class method:

NSString *converted_str = [NSString stringWithCString:converted encoding:NSISOLatin1StringEncoding];