An animation library written in Swift with a simple declarative API in mind

// moves box to 100,100 with default settings
anim {
    self.box.frame.origin = CGPoint(x:100, y:100)
}
// after that, waits 100 ms
.wait(0.1)
// moves box to 0,0 after waiting
.then {
    self.box.frame.origin = CGPoint(x:0, y:0)
}
// displays message after all animations are done
.callback {
    print("Just finished moving ? around.")
}

pod 'anim'

github "onurersel/anim"

// Initialize with default settings
anim {
    // animation block
}

// or initialize with it's own settings
anim { (settings) -> (animClosure) in
    settings.delay = 1
    settings.duration = 0.7
    settings.ease = .easeInOutBack

    return {
        // animation block
    }
}

// or initialize layout constraint animations just by passing the parent view
anim(constraintParent: self.view) {
    // animation block
}

anim(constraintParent: self.view) { (settings) -> (animClosure) in
    // settings...
    return {
        // animation block
    }
}

// you don't need to call layoutIfNeeded() before or inside the
// animation blocks, it's handled by anim
//
// for example to update constant value of a constraint,
// you can just change it inside the animation block
let width: NSLayoutConstraint //...
anim(constraintParent: self.view) {
    width.constant = 100 // new value
}
// that's it!

anim {}
.then{
    // next animation block
}

anim {}
.then { (settings) -> animClosure in
    settings.duration = 1
    return {
        // next animation block
    }
}

anim {}
.then(constraintParent: self.view) {
    // chaining constraint animations
}
.then(constraintParent: self.view) { (settings) -> animClosure in
    settings.duration = 1
    return {
        // next animation block for constraints
    }
}

anim{}.wait(0.25).then{} //...

anim{}
.callback {
    // custom block
}
.then{} //...

let animation = anim{}.then{} // ...
animation.stop()

anim.defaultSettings.ease = .easeInOutCubic