我正在使用一个函数来添加。在字符串内每三个字符之后。但是如何在数字前删除“0”。-(NSString*)formatStringAsIpAddress:(NSString*)MacAddressWithoutColon{NSMutableString*macAddressWithColon=[NSMutableStringnew];for(NSUIntegeri=0;i0&&i%3==0)[macAddressWithColonappendString:@"."];unicharc=[MacAddressWithoutColoncharacterAtIndex:i];[macAddressWi