以下代码的输出为( )
NSString * str =[[NSString alloc]initWithFormat:@"%@",@"iLanou123ios"]; NSString * str1=[str substringToIndex:3]; NSString * str2=[str substringWithRange:NSMakeRange(6, 3)]; NSString * newStr=[str1 stringByAppendingString:str2]; NSLog(@"%@",newStr);