I am totally aware that you cannot push the same UIViewController from a UINavigationController. However my implementation demands so. I have to swipe gestures. On swiping right to left, I have to reload the content of view (which is a UIScrollView) along with animation. And vice versa on left to right swipe.
I have tried with following but it does not give the expected animation:
func leftSwipe()
{
self.scroll_course_detail.frame = CGRect(x: 2*self.scroll_course_detail!.frame.size.width, y: self.scroll_course_detail.frame.origin.y, width: self.scroll_course_detail.frame.size.width, height: self.scroll_course_detail.frame.size.height)
UIView.animate(withDuration: 0.25, animations: {() -> Void in
self.scroll_course_detail.frame = CGRect(x: 0, y: self.scroll_course_detail.frame.origin.y, width: self.scroll_course_detail.frame.size.width, height: self.scroll_course_detail.frame.size.height)
})
}
func rightSwipe()
{
self.scroll_course_detail.frame = CGRect(x: -self.scroll_course_detail!.frame.size.width, y: self.scroll_course_detail.frame.origin.y, width: self.scroll_course_detail.frame.size.width, height: self.scroll_course_detail.frame.size.height)
UIView.animate(withDuration: 0.25, animations: {() -> Void in
self.scroll_course_detail.frame = CGRect(x: 0, y: self.scroll_course_detail.frame.origin.y, width: self.scroll_course_detail.frame.size.width, height: self.scroll_course_detail.frame.size.height)
})
}
Before animation block, I am changing the frame of UIScrollView which makes the background clear for the animation duration. I was thinking that UIScrollView content is overriden along with animation
So what should be the best approach for reloading content along with animation on swipe ?
Related
Im made and DropDown Menu to select Action like the GIF below.
Therefore I made a Subview and animated it in.
When animating the Subview out, it looks really weird.
In particular the problem is that it just looks like a blank small bar and not like the Menu.
Does anyone know where the problem might be?
The ViewController I'm making the Subview of is a simple ViewController with a TableView inside and 1 prototype cell.
Code:
let blackView = UIView()
var tvx: OptionsVC = OptionsVC()
var h: CGFloat!
.
func optionsClicked() {
self.h = CGFloat(70 + (52 * (OptionsVC().arrayFunctionCellNames.count)))
navigationController?.hidesBarsOnTap = false
tvx = self.storyboard?.instantiateViewController(withIdentifier: "options") as! OptionsVC
if let window = UIApplication.shared.keyWindow {
blackView.backgroundColor = UIColor(white: 0, alpha: 0.5)
blackView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleDismiss)))
view.addSubview(blackView)
view.addSubview(tvx.view)
let y = (self.navigationController?.navigationBar.frame.size.height)! + UIApplication.shared.statusBarFrame.height
tvx.view.frame = CGRect(x: 0, y: (y - self.h), width: view.frame.width, height: h)
blackView.frame = CGRect(x: 0, y: y, width: view.frame.width, height: view.frame.height)
blackView.alpha = 0
UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
self.blackView.alpha = 1
self.tvx.view.frame = CGRect(x: 0, y: y, width: self.view.frame.width, height: self.h)
self.blackView.frame = CGRect(x: 0, y: (y + self.h), width: self.view.frame.width, height: self.view.frame.height)
}, completion: nil)
}
}
.
func handleDismiss() {
UIView.animate(withDuration: 5.5, animations: {
let y = (self.navigationController?.navigationBar.frame.size.height)! + UIApplication.shared.statusBarFrame.height
self.blackView.alpha = 0
if let window = UIApplication.shared.keyWindow {
self.blackView.frame = CGRect(x: 0, y: y, width: self.view.frame.width, height: self.view.frame.height)
self.tvx.view.frame = CGRect(x: 0, y: (y - self.h), width: self.view.frame.width, height: self.h)
}
}, completion: {(finished:Bool) in
self.blackView.removeFromSuperview()
self.tvx.view.removeFromSuperview()
self.navigationController?.hidesBarsOnTap = true
})
}
GIF of BUG:
I made it so slow so you can better see it
Edit: My Solution
The problem was the constraints I set on my subview controller. Normally you set them to all sides, in my case, with was really weird I had to set them only to the bottom and sides. If I set some to the top, it would always do this bug.
You haven't really provided enough information for us to understand what's going on. What are tvx, blackView and self? What is the self.h variable? (From the animation it looks like you're changing the height of your "menu" view to be much shorter before you begin the animation code.)
Do you have a view controller contained inside another one using an embed segue?
If so, you should probably animate the constraints on the container view, not the child view controller's view.
As Glenn and D. Greg say in their comments, you should really be adding constraints to your views, hooking up outlets to those constraints, and animating changes to the constraint's constants rather than manipulating your view's frames directly. Animating changes to your view's frames isn't reliable when you're using AutoLayout, since AutoLayout can change your view's size and position out from under your animation code. That code looks like this, (in broad terms, no specific to your code)
myViewAConstraint.constant = someNewValue
myViewBConstraint.constant = someOtherValue
UIView.animate(withDuration: 5.5,
animations: {
someView.alpha = 0 //If you want the view to fade as it animates
self.view.layoutIfNeeded()
},
completion: { (finished:Bool) in
}
)
I'm trying to create a Star Wars style scrolling text for a viewController.
I have the following code:
override func viewDidAppear(_ animated: Bool) {
UIView.animate(withDuration: 60.0, animations: {
let width = self.scrollingTextLabel.frame.width
let height = self.scrollingTextLabel.frame.height
self.scrollingTextLabel.frame = CGRect(x: 5, y: (180 - height), width: width, height: height)
}, completion:{ _ in
self.buttonTextLabel.text = "Play"
})
}
It works perfectly except for 1 thing, it speeds up, then slows down. This means, it's hard to read at the mid point. Is there a way to make the speed constant?
Pass in .curveLinear in the animation options to make the animation have a constant velocity:
UIView.animate(withDuration: 60.0, delay: 0.0, options: .curveLinear, animations: {
let width = self.scrollingTextLabel.frame.width
let height = self.scrollingTextLabel.frame.height
self.scrollingTextLabel.frame = CGRect(x: 5, y: (180 - height), width: width, height: height)
}, completion:{ _ in
self.buttonTextLabel.text = "Play"
})
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)
}
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)
})
Is there a way to animate an object in swift (UIView, UIButton, etc.) so that it slides out on the left side of the screen and slides in at the same time on the right side of the screen, that the parts of f.e. an UIView that already slided out on the left side are already sliding in again from the right side.
I hope you can understand my question, its a bit tricky to explain this problem.
I'm using Xcode + Swift 3.0.
Thank you.
that the parts of f.e. an UIView that already slided out on the left side are already sliding in again from the right side
This almost slipped by me. The only way you have one "view" appear in two places on a screen is by really having two views, one on the left and one on the right.
Then, you could set the widthAnchors (properly), hide the subviews (properly), and animate. If the animation is fast enough (my one-sided slide out is set for 0.3 seconds) the user would think it's all one view.
You can use UIView.animate(). Trigger a second animation after the first has completed.
Possible implementation to get the idea:
var container = UIView(frame: CGRect(x: 0.0, y: 0.0, width: 200.0, height: 200.0))
let view = UIView(frame: CGRect(x: 0.0, y: 0.0, width: 50.0, height: 50.0))
view.center = CGPoint(x: 100, y: 100)
view.backgroundColor = UIColor.green
container.addSubview(view)
let screenWidth = CGFloat(356.0)
// animate to left
UIView.animate(withDuration: 2.0, delay: 0.0, options: [], animations: {
view.center = CGPoint(x: -view.frame.size.width, y: view.frame.origin.y)
}, completion: { (finished: Bool) in
//set view to right of screen
view.center = CGPoint(x: view.frame.size.width + screenWidth, y: view.frame.origin.y)
// animate back to center
UIView.animate(withDuration: 2.0, delay: 0.0, options: [], animations: {
view.center = CGPoint(x: 100, y: 100)
})
})