Trying to delay CABasicAnimation position and opacity of layer by 3 seconds but

Question

I am trying to delay the animation of layer\'s opacity and position by 3 seconds using setBeginTime. I have called the layer boxLayer. The animation is going well however during

Answer 1

For using beginTime you should make necessary configuration of your animation object and set fillMode to kCAFillModeBackwards like

zoomAnimation.fillMode = kCAFillModeBackwards;

That's said in Apple documentation:

Use the beginTime property to set the start time of an animation. Normally, animations begin during the next update cycle. You can use the beginTime parameter to delay the animation start time by several seconds. The way to chain two animations together is to set the begin time of one animation to match the end time of the other animation. If you delay the start of an animation, you might also want to set the fillMode property to kCAFillModeBackwards. This fill mode causes the layer to display the animation’s start value, even if the layer object in the layer tree contains a different value. Without this fill mode, you would see a jump to the final value before the animation starts executing. Other fill modes are available too.

https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/CoreAnimation_guide/AdvancedAnimationTricks/AdvancedAnimationTricks.html#//apple_ref/doc/uid/TP40004514-CH8-SW2

Also, from Rob's answer:

For your two animations, you have to change removedOnCompletion to NO and fillMode to kCAFillModeForwards (this is the correct way to keep it from reverting back to the original position upon completion).

It's a kind of controversial statement, because:

Once the animation is removed, the presentation layer will fall back to the values of the model layer, and since we’ve never modified that layer’s position, our spaceship reappears right where it started. There are two ways to deal with this issue:

The first approach is to update the property directly on the model layer. This is the recommended approach, since it makes the animation completely optional.

Alternatively, you can tell the animation to remain in its final state by setting its fillMode property to kCAFillModeForwards and prevent it from being automatically removed by setting removedOnCompletion to NO. However, it’s a good practice to keep the model and presentation layers in sync, so this approach should be used carefully.

From https://www.objc.io/issues/12-animations/animations-explained/