Currently there is a view I'm trying to translate(move), rotate and scale a view at the same time. For so strange reason it's only scaling it when I put scale at the bottom. But when I change the order and put the scaling first it rotates and translates the view properly but the scale of the view changes briefly to its correct scale before changing back to its original size. I need it to stay in it's scaled form. Here is the code:
class ViewController: UIViewController {
let newView = UIView(frame: CGRect(x: 10, y: 10, width: 100, height: 100))
override func viewDidLoad() {
super.viewDidLoad()
self.view.addSubview(newView)
UIView.animate(withDuration: 1.0, animations: {
self.newView.transform = CGAffineTransform(translationX: 50, y: 70)//translation
self.newView.transform = CGAffineTransform(rotationAngle: -CGFloat.pi / 2)//rotation
self.newView.transform = CGAffineTransform(scaleX: 1, y: 0.5)//scale
})
}
}
Try combine the transforms first, then apply them at a time:
let translate = CGAffineTransform(translationX: 50, y: 70)
UIView.animate(withDuration: 1.0, animations: {
self.view.transform = translate.rotated(by: -CGFloat.pi / 2).scaledBy(x: 1, y: 0.5)
})
Related
For my personal project, I try to make an image of a leaf go up for 5 seconds and then lower it for 5 seconds.
It works well, only after raising and lowering the sheet, it changes position and is transported well to the bottom of the screen.
I would like it to go up from the place of the end of the descent. I have tried several things but nothing works. I wish I could restore the original position after descent but I think it will make the image flicker on the screen.
Any ideas ?
func upLeaf(){
let xPosition = imageLeaf.frame.origin.x
let yPosition = imageLeaf.frame.origin.y - 100 // Slide Up - 20px
let width = imageLeaf.frame.size.width
let height = imageLeaf.frame.size.height
UIView.animate(withDuration: 5.0, animations: {
self.imageLeaf.frame = CGRect(x: xPosition, y: yPosition, width: width, height: height)
})
}
func downLeaf(){
let xPosition = imageLeaf.frame.origin.x
let yPosition = imageLeaf.frame.origin.y + 100 // Slide Up - 20px
let width = imageLeaf.frame.size.width
let height = imageLeaf.frame.size.height
UIView.animate(withDuration: 5.0, animations: {
self.imageLeaf.frame = CGRect(x: xPosition, y: yPosition, width: width, height: height)
})
secondUp = true
}
Instead of using frame to perform the animation you could use CGAffineTransform. It's more powerful and equally easy:
UIView.animate(withDuration: 5.0, animations: {
line3.transform = CGAffineTransform(translationX: 0, y: 100)
})
When you want to return to the initial state you should type:
UIView.animate(withDuration: 5.0, animations: {
line3.transform = CGAffineTransform.identity
})
CGAffineTransform remembers the initial parameters for your view, so that you don't have to do any calculations yourself.
If you only want the leaf to go up and down, you can just animate imageLeaf's frame.origin.y (no need to keep track of origin.x, width, or height).
func upDownLeaf() {
UIView.animate(withDuration: 5.0, animations: {
self.imageLeaf.frame.origin.y -= 100 /// go up
}) { _ in
UIView.animate(withDuration: 5.0, animations: {
self.imageLeaf.frame.origin.y += 100 /// go down
})
}
}
My question is similar to this one. However, I want an updated version for swift, and I want it to go endlessly. Here is my animation now:
bubble.frame.origin = CGPoint(x: 75, y: -120)
UIView.animate(
withDuration: 2.5,
animations: {
self.bubble.transform = CGAffineTransform(translationX: 0, y: self.view.frame.height * -1.3)
}
)
After the bubble goes off screen, I want it to go back on from the bottom and go up off screen again and again endlessly.
Use the option from the UIViewAnimationOptions set:
UIViewAnimationOptions.Repeat
Should look like this with your code:
bubble.frame.origin = CGPoint(x: 75, y: -120)
UIView.animate(withDuration: 2.5, options: [UIViewAnimationOptions.Repeat], animations: {
self.bubble.transform = CGAffineTransform(translationX: 0, y: self.view.frame.height * -1.3)
})
I'm trying to make a cool launch screen but it's a little bit hard. I would like to make my image appear the way this appears:
what I would like
But for the moment the only animation I succeeded to do is this:
what I've made
The image I use is a PNG with transparent border and the yellow drawing.
The code I use to have the animation I have
( "yellowSide" is actually the name of the outlet from the imageView that hold my image with the yellow drawing):
func animation() {
yellowSide.frame = CGRect(x: yellowSide.frame.origin.x, y: yellowSide.frame.origin.y, width: 0, height: 47)
yellowSide.alpha = 0
UIView.animate(withDuration: 0.5, delay: 2.0, options: .curveEaseIn, animations: {
var yellowSideFrame = self.yellowSide.frame
self.yellowSide.frame = CGRect(x: yellowSideFrame.origin.x, y: yellowSideFrame.origin.y, width: 243, height: 47)
self.yellowSide.alpha = 1
}, completion: nil)
}
As you guess the width / value I enter are the value that I need to have so the image looks the way I want when it's fully appeared.
You are changing the frame but you are not clipping out of frame image . you need to do like below .
// in ViewDidLoad method
yellowSide.clipsToBounds=true
func animation() {
yellowSide.frame = CGRect(x: yellowSide.frame.origin.x, y: yellowSide.frame.origin.y, width: 0, height: 47)
yellowSide.alpha = 0
UIView.animate(withDuration: 0.5, delay: 2.0, options: .curveEaseIn, animations: {
var yellowSideFrame = self.yellowSide.frame
self.yellowSide.frame = CGRect(x: yellowSideFrame.origin.x, y: yellowSideFrame.origin.y, width: 243, height: 47)
self.yellowSide.alpha = 1
}, completion: nil)
}
I have collection view and on tap on its cell uiview is created with coordinates of cell translated to superview. Next I need to resize created uiview to screen size while newly created uiview rotating on 90 degrees:
let coord = collectionView.layoutAttributesForItem(at: indexPath)
let cellFrameInSuperview:CGRect! = collectionView.convert(coord!.frame, to: self.view)
let imageViewDummy = UIView(frame: CGRect(x: (cellFrameInSuperview?.origin.x)!, y: (cellFrameInSuperview?.origin.y)!, width: cell.videoContainer.coverImageView.frame.size.width, height: cell.videoContainer.coverImageView.frame.size.height))
UIView.animate(withDuration: 3, animations: {
var transform = CGAffineTransform.identity
transform = transform.rotated(by: CGFloat(Double.pi / 2))
imageViewDummy.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.height, height: UIScreen.main.bounds.width)
imageViewDummy.transform = transform
})
But after animation, view is wrongly placed. It should fit full screen
UPDATE:
Working code:
UIView.animate(withDuration: 3, animations: {
imageViewDummy.center = CGPoint(x: imageViewDummy.frame.size.height / 2, y: imageViewDummy.frame.size.width / 2)
var transform = CGAffineTransform.identity
transform = transform.rotated(by: CGFloat(Double.pi / 2))
imageViewDummy.transform = transform
imageViewDummy.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height)
}, completion: {(result: Bool) in
})
I want to have an UIView to appear by scaling from left to right if I hit a button. If I hit the button again, the view should scale away from right to left.
I found an explanation how to do it for left to right, but even this solution is working only once. If I hide the view and play the animation again it scales it from the centre again.
Also scaling it back from right to left doesn't work either as it disappears immdiatly without any animation.
Here's my code so far:
if(!addQuestionaryView.isHidden)
{
//Reset input if view is hidden
addQuestionaryInput.text = ""
self.addQuestionaryView.isHidden = false
let frame = addQuestionaryView.frame;
let rect = CGRect(x: frame.origin.x, y: frame.origin.y, width: frame.width, height: frame.height)
let leftCenter = CGPoint(x: rect.minX, y: rect.minY)
addQuestionaryView.layer.anchorPoint = CGPoint(x:1,y: 0.5)
addQuestionaryView.layer.position = leftCenter
UIView.animate(withDuration: 0.6,
animations: {
self.addQuestionaryView.transform = CGAffineTransform(scaleX: 0, y: 1)
},
completion: { _ in
self.addQuestionaryView.isHidden = true
})
}
else
{
self.addQuestionaryView.isHidden = false
let frame = addQuestionaryView.frame;
let rect = CGRect(x: frame.origin.x, y: frame.origin.y, width: frame.width, height: frame.height)
let leftCenter = CGPoint(x: rect.minX, y: rect.midY)
addQuestionaryView.layer.anchorPoint = CGPoint(x:0,y: 0.5);
addQuestionaryView.layer.position = leftCenter
addQuestionaryView.transform = CGAffineTransform(scaleX: 0, y: 1)
UIView.animate(withDuration: 0.6,
animations: {
self.addQuestionaryView.transform = CGAffineTransform(scaleX: 1, y: 1)
},
completion: nil)
}
As said the appearing part works once and then starts from the centre again. The disappearing part doesn't work at all.
I don't know what "to scale it so it has a little look like Android reveal animations" means (and I hope I never do; I've never seen an Android phone, I never hope to see one).
But do you mean something like this? This is done by animating a mask in front of the view, thus revealing and then hiding it:
Here's the code used in that example:
class MyMask : UIView {
override func draw(_ rect: CGRect) {
let r = CGRect(x: 0, y: 0, width: rect.width/2.0, height: rect.height)
UIColor.black.setFill()
UIGraphicsGetCurrentContext()?.fill(r)
}
}
class ViewController: UIViewController {
#IBOutlet weak var lab: UILabel!
var labMaskOrigin = CGPoint.zero
var didAddMask = false
override func viewDidLayoutSubviews() {
if didAddMask {return}
didAddMask = true
let mask = MyMask()
mask.isOpaque = false
let w = self.lab.bounds.width
let h = self.lab.bounds.height
mask.frame = CGRect(x: -w, y: 0, width: w*2, height: h)
self.lab.mask = mask
self.labMaskOrigin = mask.frame.origin
}
var labVisible = false
func toggleLabVisibility() {
labVisible = !labVisible
UIView.animate(withDuration: 5) {
self.lab.mask!.frame.origin = self.labVisible ?
.zero : self.labMaskOrigin
}
}
}
Remove this:
addQuestionaryView.layer.anchorPoint = CGPoint(x:0,y: 0.5);
addQuestionaryView.layer.position = leftCenter
addQuestionaryView.transform = CGAffineTransform(scaleX: 0, y: 1)
Then in your animate with duration block use the code below instead of CGAfflineTransform
addQuestionaryView.frame = CGRect(0,0,500,100)
Replace 500 width whatever width you want it to be.
Ans to close it back up do this:
addQuestionaryView.frame = CGRect(0,0,0,100);