Question

I am writing code which should reverse a string. When I run the following code it throws an error:

- (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;
}

Answer 1

try this sample code :

NSString *name = @"abcdefghi" ;
    int len = [name length];
    NSMutableString *reverseName = [[NSMutableString alloc] initWithCapacity:len];

    for(int i=len-1;i>=0;i--)
    {
        [reverseName appendFormat:[NSString stringWithFormat:@"%c",[name characterAtIndex:i]]];

    }

    NSLog(@"%@",reverseName);