Custom dropdown alert.

//Create a view to hold the label and add images or whatever, place it off screen at -100

    UIView *alertview = [[UIView alloc] initWithFrame:CGRectMake(0, -100, CGRectGetWidth(self.view.bounds), 100)];

    alertview.backgroundColor=[UIColor redColor];

    //Create a label to display the message and add it to the alertView

    UILabel *theMessage = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth(alertview.bounds), CGRectGetHeight(alertview.bounds))];

    

    theMessage.text = @"Hey Alert showing";

    [alertview addSubview:theMessage];

    //Add the alertView to your view

    [self.view addSubview:alertview];

    //Create the ending frame or where you want it to end up on screen, in this case 0 y origin

    CGRect newFrm = alertview.frame;

    newFrm.origin.y = 0;

    

    //Animate it in

    [UIView animateWithDuration:2.0f animations:^{

        alertview.frame = newFrm;

    }];