just a quick issue I'm having regarding animating a moving background image for my current application setup. Essentially I want to have my currently still background image scroll from left to right endlessly across my view; but I'm struggling piecing it all together. From a variety of various other sources I've comprised this function that isn't currently working, and i really can't figure out how or why.
func animate(_ image: UIImageView) {
UIView.animate(withDuration: 5, delay: 0, options: .curveLinear, animations: {
image.transform = CGAffineTransform(translationX: -100, y: 0)
}) { (success: Bool) in
image.transform = CGAffineTransform.identity
self.animate(image)
}
}
Any help/assistance is immensely appreciated!
You don't need to use CAffineTranform inside animateWithDuration, you can simply define the new center like:
let oldCenter = image.center
let newCenter = CGPoint(x: oldCenter.x - 100, y: oldCenter.y)
UIView.animate(withDuration: 1, delay: 0, options: .curveLinear, animations: {
image.center = newCenter
}) { (success: Bool) in
print("Done moving image")
}
Hope it helps.
Related
I need to animated a UIView. the animation direction like Right to left. (RTL) I use a left to right (LTR) animation code is given below
(LTR) Code:
UIView.animate(withDuration: 0.5, delay: 0.25, options: UIViewAnimationOptions(),
animations: { () -> Void in
self.viewSideMenuHolder.frame = CGRect(x: 0, y: 0,width: self.view.frame.size.width ,height: self.view.frame.size.height)
},
completion: { (finished: Bool) -> Void in
self.viewSideMenuHolder.backgroundColor = UIColor.black.withAlphaComponent(0.5)
})
}
I need to change a UIView animated direction is (RTL) any one help me.
I got the Solution. Solution is..
UIView.animate(withDuration: 0.5, delay: 0.25, options: UIViewAnimationOptions(), animations: { () -> Void in
self.viewSideMenuHolder.frame = CGRect(x: self.view.frame.size.width, y: 0,width: self.view.frame.size.width ,height: self.view.frame.size.height)
}, completion: { (finished: Bool) -> Void in
self.viewSideMenuHolder.backgroundColor = UIColor.clear
})
just quick inquiry in regards to implementing an issue I'm having with animating a UIImageView. I successfully implemented animating an image to slide off screen; but i want it to reappear when it exists the view to simulate a side-scroller game animation.
Something like this:
I've tried implementing a completion handler but struggled understanding the logic of how to implement it, so I removed my attempts; so my code is left as follows:
let oldCenter = background.center
let newCenter = CGPoint(x: oldCenter.x - 400, y: oldCenter.y)
UIView.animate(withDuration: 2, delay: 0, options: .curveLinear, animations: {
self.background.center = newCenter
}) { (success: Bool) in
print("Done moving image")
}
An example or pointers on how to achieved my desired animation would be appreciated!
let oldCenter = view.center
let newCenter = CGPoint(x: oldCenter.x - 400, y: oldCenter.y)
UIView.animate(withDuration: 2.0, delay: 0.0, options:
[.curveLinear, .repeat], animations: {
view.center = newCenter
}, completion: nil)
If you want to repeat the animation,
there is no need to implement the completion.
animate(withDuration:delay:options:animations:completion:) has options parameter (UIViewAnimationOptions), which is:
A mask of options indicating how you want to perform the animations.
For a list of valid constants, see UIViewAnimationOptions.
One of the constants for the UIViewAnimationOptions is repeat:
Repeat the animation indefinitely.
So, what you should do:
UIView.animateKeyframes(withDuration: 2.0, delay: 0.0, options: [.curveLinear, .repeat], animations: {
self.background.center = newCenter
}, completion: nil)
Again, implementing completion is not required for repeating the animation, implementing it is up to your case.
You can try UIView UIView repeat option
let oldCenter = background.center
let newCenter = CGPoint(x: oldCenter.x - 400, y: oldCenter.y)
UIView.animate(withDuration: 2, delay: 0, options: [.curveLinear, repeat], animations: {
self.background.center = newCenter
}) { (success: Bool) in
print("Done moving image")
if(success)
{
self.background.center = oldCenter
}
}
I'm totally newbies with iOS Swift developement and i try to combine three parameters in a single animations but i don't succeed.
I think the solution is here -Apple Dev Core Animation Programming Guide by grouping the animations but being a beginner and after a lot of Internet research i can't find what i'm looking for.
What do you think of my code and what is for you the best solution to combine performance and stability.
I want to point out that the purpose of this animation is to create an animated Splashscreen. There are other elements (UIImage) that will be to animates.
Here is my code:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
logoImg.alpha = 0
logoImg.transform = CGAffineTransform(translationX: 0, y: -200)
logoImg.transform = CGAffineTransform(scaleX: 0, y: 0)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
UIView.animate(withDuration: 1.0, delay: 1.0, usingSpringWithDamping: 0.6, initialSpringVelocity: 10, options: [.curveEaseOut], animations: {
self.logoImg.transform = CGAffineTransform(translationX: 0, y: 0)
self.logoImg.transform = CGAffineTransform(scaleX: 1, y: 1)
self.logoImg.alpha = 1
}, completion: nil)
}
Based on what I am seeing you are wanting to preset the animation and translate it back. In that case I would do this.
self.logoImg.transform = CGAffineTransform(translationX: 0, y: -200).concatenating(CGAffineTransform(scaleX: 0, y: 0))
self.logoImg.alpha = 0
UIView.animate(withDuration: 1.0, delay: 1.0, usingSpringWithDamping: 0.6, initialSpringVelocity: 10, options: [.curveEaseOut], animations: {
self.logoImg.transform = .identity
self.logoImg.alpha = 1
}, completion: nil)
I think you may not be seeing all the animation so try to start the scale at 0.5
self.logoImg.transform = CGAffineTransform(translationX: 0, y: -200).concatenating(CGAffineTransform(scaleX: 0.5, y: 0.5))
self.logoImg.alpha = 0
UIView.animate(withDuration: 1.0, delay: 1.0, usingSpringWithDamping: 0.6, initialSpringVelocity: 1, options: [.curveEaseOut], animations: {
self.logoImg.transform = .identity
self.logoImg.alpha = 1
}, completion: nil)
The key here is that the animation is animating back the original identity. Hope this helps
You can use concatenating method to combining two existing affine transforms.
UIView.animate(withDuration: 1.0, delay: 1.0, usingSpringWithDamping: 0.6, initialSpringVelocity: 10, options: [.curveEaseOut], animations: {
let translation = CGAffineTransform(translationX: 0, y: 0)
let scale = CGAffineTransform(scaleX: 1, y: 1)
self.logoImg.transform = translation.concatenating(scale)
self.logoImg.alpha = 1
}, completion: nil)
Look at Apple Document for more info. Hope it help. :)
Rotate and Translate and make it like parallax effect in tableview header:
func setupTableHeaderView() {
self.customHeaderView = UIView(frame: CGRect(x: 0, y: 0, width: SCREEN_WIDTH, height: 200))
self.customHeaderView?.backgroundColor = .white
self.customImageView = UIImageView(frame: CGRect(x: 0, y: 0, width: SCREEN_WIDTH, height: 200))
self.customImageView?.image = ImageNamed(name: "camera")
self.customImageView?.contentMode = .center
self.customHeaderView?.addSubview(self.customImageView!)
self.tableHeaderView = self.customHeaderView
}
func scrollViewDidScroll(_ scrollView: UIScrollView) {
let yPos = scrollView.contentOffset.y
if yPos < 0 {
let scaleX = ((yPos * -1) / 200) + 1
let translateY = yPos / 2
var commonTransform = CGAffineTransform.identity
commonTransform = commonTransform.translatedBy(x: 0, y: translateY)
commonTransform = commonTransform.scaledBy(x: scaleX, y: scaleX)
self.customImageView?.transform = commonTransform
}else{
self.customImageView?.transform = CGAffineTransform.identity
}
}
NOTE : Make sure the View you apply transform to is SUBVIEW of the header view, not header view itself. In above example customImageView is subview of main headerview.
You can use this also with swift 3.0.1:
UIView.transition(with: self.imageView,
duration:0.5,
options: .transitionCrossDissolve,
animations: { self.imageView.image = newImage },
completion: nil)
Reference: https://gist.github.com/licvido/bc22343cacfa3a8ccf88
The title might be a little confusing, but is there a way I can Get this code to execute the moment I touch the uiview?
entry.transform = CGAffineTransform(scaleX: 0.975, y: 0.975)
speech.transform = CGAffineTransform(scaleX: 0.975, y: 0.975)
I have a UIView that I want to simulate a button press. Currently, the way I have it set up, It only triggers once my finger has left the screen
func voiceTap(sender: UITapGestureRecognizer? = nil) {
entry.transform = CGAffineTransform(scaleX: 0.975, y: 0.975)
speech.transform = CGAffineTransform(scaleX: 0.975, y: 0.975)
UIView.animate(withDuration: 0.2, delay: 0, options: UIViewAnimationOptions.curveLinear, animations: {
self.entry.transform = CGAffineTransform.identity
self.speech.transform = CGAffineTransform(scaleX: 0.975, y: 0.975)
}, completion: nil)
}
How to I get the code outside of the animation block to trigger the moment my finger touches the UIView?
You need to implement the methods (touchesBegan: withEvent: etc) to detect the received touch in your UIViewController and check if the touch corresponds to the UIView of your interest. And from there you can trigger an action.
Check this thread how to implement the methods
Or this one
I have a UIButton that I have placed in the center of the screen using Interface Builder.
I want to animate the UIButton to move up and down and repeat the animation forever.
So far I have this in my didMoveToView:
UIView.animateWithDuration(3, animations: { () -> Void in
self.playBtn.transform = CGAffineTransformMakeTranslation(0, 10)
self.playBtn.transform = CGAffineTransformMakeTranslation(0, -10)
self.playBtn.transform = CGAffineTransformMakeTranslation(0, -10)
self.playBtn.transform = CGAffineTransformMakeTranslation(0, 10)
UIView.setAnimationRepeatCount(-1)
})
However it only runs the first line and moves the button down 10.
You can't change the transform to multiple things simultaneously. I would expect your code to cause no animation at all, as changing the transform more than once would cancel the animation.
Another problem with your code is that what you're saying is not how you ask for a repeating animation.
Still another problem is that you won't ever bring the button back to its starting place; the transforms are not additive.
What you need to do is chain animations together. This will be easiest if you drop down to Core Animation and make a grouped animation.
Or can do it with view animation by doing a keyframe animation, perhaps; this is not identical to what you want, but it will get you started:
Swift 2
let opts = UIViewKeyframeAnimationOptions.Repeat
UIView.animateKeyframesWithDuration(3, delay: 0, options: opts, animations: {
UIView.addKeyframeWithRelativeStartTime(0, relativeDuration: 0.5, animations: {
self.playBtn.transform = CGAffineTransformMakeTranslation(0, 10)
})
UIView.addKeyframeWithRelativeStartTime(0.5, relativeDuration: 0.5, animations: {
self.playBtn.transform = CGAffineTransformIdentity
})
}, completion: nil)
Swift 3,4,5
let opts = UIView.KeyframeAnimationOptions.repeat
UIView.animateKeyframes(withDuration: 3, delay: 0, options: opts, animations: {
UIView.addKeyframe(withRelativeStartTime: 0, relativeDuration: 0.5, animations: {
self.playBtn.transform = CGAffineTransform(translationX: 0, y: 10)
})
UIView.addKeyframe(withRelativeStartTime: 0.5, relativeDuration: 0.5, animations: {
self.playBtn.transform = CGAffineTransform.identity
})
}, completion: nil)
But really, it would be better if you learned how animation actually works before you get into this kind of thing. From your code, it appears to me you are just thrashing.