#UIKit #animation

UIView+TimingFunction.m

+ (void)animateWithDuration:(NSTimeInterval)duration
             timingFunction:(CAMediaTimingFunction*)timingFunction
                 animations:(void (^)(void))animations
                 completion:(void (^)(BOOL finished))completion
{
    [CATransaction begin];
    [CATransaction setAnimationDuration:duration];
    [CATransaction setAnimationTimingFunction:timingFunction];

    [UIView animateWithDuration:duration animations:animations completion:completion];

    [CATransaction commit];
}

UIView+TimingFunction.swift

extension UIView {
    static func animate(duration: TimeInterval,
                        timingFunction: CAMediaTimingFunction,
                        animations: @escaping () -> (),
                        completion: ((Bool) -> ())? = nil) {
        CATransaction.begin()
        CATransaction.setAnimationDuration(duration)
        CATransaction.setAnimationTimingFunction(timingFunction)
        
        animate(withDuration: duration, animations: animations, completion: completion)

        CATransaction.commit()
    }
}