小编sar*_*ana的帖子

我正在编写应该反转字符串的代码.当我运行以下代码时,它会抛出一个错误:

- (NSString*) reversingName:(NSString *)myNameText
{
   NSString *result;
   int len = [myNameText length];
   NSMutableString *reverseName = [[NSMutableString alloc] initWithCapacity:len];
   for(int i=len;i>0;i--)
   {
     [reverseName appendFormat:[NSString stringWithFormat:@"%c",[myNameText characterAtIndex:i]]];
   }
   result = reverseName;
   return result;
}