How can I slide a view in and out of a window in a Cocoa program

Question

I want to have a view on a window and in response to a message (button click or menu) I want to have another view slide down above it, and have the first view resize.

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Answer 1

CoreAnimation is definitely your best bet. It has been a while since I've worked with any CA code, but something like:

[UIView beginAnimations:@"slideOn" context:nil];

firstView.frame = shrunkFirstViewRect; // The rect defining the first view's smaller frame. This should resize the first view

secondView.frame = secondViewOnScreenFrame; // This should move the second view on the frame. 

[UIView commitAnimations];

Later, you could return to a single view using:

[UIView beginAnimations:@"slideOff" context:nil];

firstView.frame = normalFirstViewRect; // The rect defining the first view's normal frame. This should expand the first view.

secondView.frame = secondViewOffScreenFrame; // Move the second view off the screen

[UIView commitAnimations];

Edit: The above code is for the iPhone, I read your question a bit quick.

On the Mac, you would want to use (similarly):

[NSAnimationContext beginGrouping];
[[NSAnimationContext currentContext] setDuration:1.0f]; // However long you want the slide to take

[[firstView animator] setFrame:shrunkFirstViewRect];

[[secondView animator] setFrame:secondViewOnScreenFrame];

[NSAnimationContext endGrouping];