How do you do successive animations? - swift

Question

I’m wanting to do successive animations, like one after another instead of on a loop or one at a time. What does it look like when coding that?
Example: fade in # 100% opacity, then fade out # 20% opacity, then fade in 80%, then fade out 10%... so like a pulsing then at 0% change the label text and do the inverse (basically the same as the picture only every time I try and make it progressively fade out- it disrupts the whole animation)
The gif shows it's current state, not what I've tried thus far that didnt work.
import UIKit
class Belief2ViewController: UIViewController {
#IBOutlet var negBeliefLabelGlower: UILabel!
#IBOutlet var posBeliefLabelGlower: UILabel!
#IBOutlet var labelNegBeliefFinal: UILabel!
#IBOutlet var startButton: UIButton!
//PASSING INFO
var negBeliefLabelGlowerText = String()
var posBeliefLabelGlowerText = String()
override func viewDidLoad() {
super.viewDidLoad()
//PASSING INFO
negBeliefLabelGlower.text = negBeliefLabelGlowerText
posBeliefLabelGlower.text = posBeliefLabelGlowerText
//PASSING INFO
labelNegBeliefFinal.text = negBeliefLabelGlowerText
//GLOW
labelNegBeliefFinal.UILableTextShadow(color: UIColor.systemTeal)
//AniamtionOpacityLOOP
labelNegBeliefFinal.alpha = 0.3
// UIView.animate(withDuration: 5, animations: {self.labelNegBeliefFinal.alpha = 100}, completion: { _ in self.labelNegBeliefFinal.alpha = 90;})
UIView.animate(withDuration: 6, delay: 0, options: [.autoreverse, .repeat], animations: { self.labelNegBeliefFinal.alpha = 100 })
//AnimationBreathSizeLOOP
UIView.animate(withDuration: 6, delay: 0, options: [.autoreverse, .repeat], animations: { self.labelNegBeliefFinal.transform = CGAffineTransform(scaleX: 1.3, y: 1.3) })
}
#IBAction func startButtonPress(_ sender: Any) {
//self.labelNegBeliefFinal.text = self.posBeliefLabelGlowerText
// UIView.animate(withDuration: 10, animations: {self.labelNegBeliefFinal.alpha = 0}, completion: { _ in self.labelNegBeliefFinal.text = self.posBeliefLabelGlowerText;})
UIView.animate(withDuration: 10, delay: 0, animations: {self.labelNegBeliefFinal.alpha = 0}, completion: { _ in
self.labelNegBeliefFinal.text = self.posBeliefLabelGlowerText ;})
//
}
}
//GLOW
extension UILabel {
func UILableTextShadow1(color: UIColor){
textColor = UIColor.systemTeal
layer.shadowColor = UIColor.systemTeal.cgColor
layer.masksToBounds = false
layer.shadowOffset = .zero
layer.shouldRasterize = true
layer.rasterizationScale = UIScreen.main.scale
layer.shadowRadius = 5.0
layer.shadowOpacity = 5.0
}
}
EDIT
Okay so using the keyframes as suggest was a perfect suggestion
but I am running into a bit of an issue. I cannot key in the label text to change
UIView.animateKeyframes(withDuration: 15.0,
delay: 0.0,
options: [],
animations: {
UIView.addKeyframe(withRelativeStartTime: 1,
relativeDuration: 0.0,
animations: { self.labelNegBeliefFinal.text = self.posBeliefLabelGlowerText })
},
completion: nil)

Answer 1

So I wasn't able to incorporate the label into the keyframe animation so I just set a delay to the bale changing and it took a little tweaking but here is what I came up with
//CHANGE LABEL ON TIMER
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 13.5)
{ [self] in
self.labelNegBeliefFinal.text = self.posBeliefLabelGlowerText
}
Here is the glow loop and size loop as before, unrelated to the tween
//AniamtionGlowLOOP
UIView.animate(withDuration: 6, delay: 0, options: [.autoreverse, .repeat],
animations: { self.labelNegBeliefFinal.layer.shadowOpacity = 5.0 })
//AnimationBreathSizeLOOP
UIView.animate(withDuration: 6, delay: 0, options: [.autoreverse, .repeat],
animations: { self.labelNegBeliefFinal.transform = CGAffineTransform(scaleX:
1.3, y: 1.3) })
// }
Here is the tween code I came up with thanks to Matt for the point in the right direction. Had no idea you could tween in SwiftUI. One thing that threw me off is that if the duration is 30sec, relative duration being set to 0.5 is equal to 15 seconds as it's 0.5 of 30 seconds. Some of my tweens didn't seem to work because I didn't realize that.
UIView.animateKeyframes(withDuration: 30.0,
delay: 0,
options: [ ],
animations: {
UIView.addKeyframe(withRelativeStartTime:
0,
relativeDuration: 0.5,
animations: { self.labelNegBeliefFinal.alpha = 0 })
UIView.addKeyframe(withRelativeStartTime:
0.5,
relativeDuration: 0.5,
animations: { self.labelNegBeliefFinal.alpha = 1 })
},
completion: nil)
}
}
Glow style I got from a different post
//GLOW
extension UILabel {
func UILableTextShadow1(color: UIColor){
textColor = UIColor.systemTeal
layer.shadowColor = UIColor.systemTeal.cgColor
layer.masksToBounds = false
layer.shadowOffset = .zero
layer.shouldRasterize = true
layer.rasterizationScale = UIScreen.main.scale
layer.shadowRadius = 5.0
layer.shadowOpacity = 00.7
}
}