Slide down a UIView on a button action

In iOS app, we may have a requirement like, when a user tap on a button , a UIView slide down with animation . To implement this we can create a button and UIView on the top of button and make it hidden . Then in action method of the button change the frame of the UIView with animation  according to our requirement . To make it hide again with animation like slide top, reverse the operation .

Here is an example in which we will make a UIView slide down when a user tap on the button.

1) Create a UIButton

2) Then create a UIView on the top of UIButton  and make it hidden . Lets say we named it myView

3) Then in action method of UIButton , check if button is hidden or not and act accordingly:

if([myView isHidden]){

 First unhide the button

myView.hidden = NO;
 
Get the frame of the btn

CGRect frame  = myView.frame

Now change the y origin of the  frame

frame.origin.y += 30;

Now set animation to change the frame of the myView

[UIView animateWithDuration:0.7 delay:0.0
options:UIViewAnimationOptionCurveLinear animations:^{

      myView.frame  = frame

} completion:nil];


That's all . Now if we want to slide top the myView again ,when user tap on the button then change the frame of the myView to its original size .