CABasicAnimation move frame left by 300px - objective-c

Question

I need help with CABasicAnimation. I am trying to move a NSView left by 300 pixels. I found this SO thread: How to animate the frame of an layer with CABasicAnimation?
Turns out animating the frame is not possible and one of the answer points to a link to QA on Apple's website but it takes me a to a generic page:
http://developer.apple.com/library/mac/#qa/qa1620/_index.html
So, how can I do something as simple as translation of my NSView/CALyer?
Thanks!

Answer 1

NSView has a protocol called NSAnimatablePropertyContainer which allows you to create basic animations for views:
The NSAnimatablePropertyContainer protocol defines a way to add
animation to an existing class with a minimum of API impact ...
Sending of key-value-coding compliant "set" messages to the proxy will
trigger animation for automatically animated properties of its target
object.
The NSAnimatablePropertyContainer protocol can be found here
I recently used this technique to change the origin of a frame:
-(void)setOrigin:(NSPoint)aPoint {
[[self animator] setFrameOrigin:aPoint];
}
Instead of calling the [view setFrameOrigin:], I created another method called setOrigin: which then applies the setFrameOrigin: call to the view's animator.
If you need to change the duration of the animation, you can do so like this (similar to CATransactions):
-(void)setOrigin:(NSPoint)aPoint {
[NSAnimationContext beginGrouping];
[[NSAnimationContext currentContext] setCompletionHandler:^{
...Completion Callback Code goes here...
}];
[[NSAnimationContext currentContext] setDuration:1.0];
[[self animator] setFrameOrigin:aPoint];
[NSAnimationContext endGrouping];
}
The NSAnimationContext is described here

Answer 2

You can animate center property instead. Eg:
//assuming view is your NSView
CGPoint newCenter = CGPointMake(view.center.x - 300, view.center.y);
CABasicAnimation *animation = [CABasicAnimation animation];
//setup your animation eg. duration/other options
animation.fromValue = [NSValue valueWithCGPoint:v.center];
animation.toValue = [NSValue valueWithCGPoint:newCenter];
[view.layer addAnimation:animation forKey:#"key"];