Feature: Timing functions

[marcosgriselli]

This PR adds support for Predefined Timing Functions. The library used the UIView animation API with springs which doesn't rely on timing functions.

To support this I had to remove. the default spring parameters so the method's signature would differ. Since this is a breaking change I also went ahead a replaced the AnimationType.from(Direction, CGFloat) case for AnimationType.vector(Vector).

I'll keep this PR open for the weekend in case anybody wants to comment.

[iTarek]

Hi, Please update the readme examples. Also is there any example for using AnimationType.vector, how I change this to vector
let animMove = AnimationType.from(direction: .bottom, offset: self.view.height/2)
Thank you

[marcosgriselli]

Good call @iTarek! I'll update the examples shortly. What you're looking for is:
let animMove = AnimationType.vector((CGVector(dx: 0, dy: self.view.height/2))

Both CollectionViewController.swift and TableViewController.swift files have examples using the .vector animation you can check those. I'll update the docs shortly.

[iTarek]

The AnimationType.vector is so confusing, I have icon on middle of screen and I was able to animate it to go down off screen like that....
let animMove = AnimationType.from(direction: .bottom, offset: self.view.height/2)
loadingViewIcon.animate(animations: [animMove], reversed: true, initialAlpha: 1, finalAlpha: 1, duration: 20.2)

Right now with AnimationType.vector the icon not start from the position it was before but it jumps to the new position and then move back, Is reversed: true working as it was before?

[marcosgriselli]

@iTarek you're right. There's some odd behavior. The example app is working in the same way as before with UITableView and UICollectionView but I individual views have problems.

I'll send a PR fixing this and adding examples shortly.

In the meantime I recommend you switch back to the previous release 2.7.0 to avoid any issues and still be able to use the directions as before.

[iTarek]

@iTarek you're right. There's some odd behavior. The example app is working in the same way as before with UITableView and UICollectionView but I individual views have problems.

I'll send a PR fixing this and adding examples shortly.

In the meantime I recommend you switch back to the previous release 2.7.0 to avoid any issues and still be able to use the directions as before.

Thank you for the quick response, I will wait for the next update 😊

[marcosgriselli]

@iTarek after some review I believe the functionality is working as expected. I agree the API is a bit confusing but I'm testing the example project and running this code:

let animation = AnimationType.vector(CGVector(dx: 0, dy: 30))
activityIndicator.animate(animations: [animation], reversed: true, initialAlpha: 1, finalAlpha: 0)

will effectively animate the view by moving it from its current position 30 points to the bottom. Can you maybe replicate the issue you're having on a PR or demo project?