Basic newbie question.
I am looking to place several images into a collection view. How can I have the image flip over to reveal the back of the image in Xcode using swift? Thank you all for your help.
I'm not sure about what exactly are you trying to achieve, but I'm using this function to rotate image horizontally and to change the image during the transition. Hope it helps.
private func flipImageView(imageView: UIImageView, toImage: UIImage, duration: NSTimeInterval, delay: NSTimeInterval = 0)
{
let t = duration / 2
UIView.animateWithDuration(t, delay: delay, options: .CurveEaseIn, animations: { () -> Void in
// Rotate view by 90 degrees
let p = CATransform3DMakeRotation(CGFloat(GLKMathDegreesToRadians(90)), 0.0, 1.0, 0.0)
imageView.layer.transform = p
}, completion: { (Bool) -> Void in
// New image
imageView.image = toImage
// Rotate view to initial position
// We have to start from 270 degrees otherwise the image will be flipped (mirrored) around Y axis
let p = CATransform3DMakeRotation(CGFloat(GLKMathDegreesToRadians(270)), 0.0, 1.0, 0.0)
imageView.layer.transform = p
UIView.animateWithDuration(t, delay: 0, options: .CurveEaseOut, animations: { () -> Void in
// Back to initial position
let p = CATransform3DMakeRotation(CGFloat(GLKMathDegreesToRadians(0)), 0.0, 1.0, 0.0)
imageView.layer.transform = p
}, completion: { (Bool) -> Void in
})
})
}
Don't forget to import GLKit.
-(void)showButtton
{
self.userInteractionEnabled = false;
[UIView transitionWithView:self duration:0.3 options:UIViewAnimationOptionTransitionFlipFromRight animations:^{
//code to change the image of UIButton
} completion:^(BOOL finished) {
self.userInteractionEnabled = true;
}];
}
Here is a code to do so.
Related
I'm currently trying to rotate an image about 13 degrees and then have that image "dash" off the screen to the left. It's not working the way I'd like -- once the image rotates and I try to animate any more movements it distorts the image by stretching it 'till it's one pixel thin!
How do I preserve the image's width and height without any distortion? I tried layout constraints and programmatically setting the frame.size (width and height) but that didn't work either. Here's the code:
#IBOutlet weak var astro: UIImageView!
UIView.animate(withDuration: 1.5, animations: {
self.astro.transform = CGAffineTransform(rotationAngle: -13 * 3.14/180.0)
self.view.layoutIfNeeded()
}, completion: { (success) in
if(success == true){
UIView.animate(withDuration: 1.5, animations: {
self.astro.frame.origin.x = -100
self.astro.frame.origin.y = 0
self.astro.frame.size.height = 119
self.astro.frame.size.width = 108
})
}
You need to "reset" the transform, change the frame, and then re-apply the transform:
let rot = CGAffineTransform(rotationAngle: -13 * 3.14/180.0)
UIView.animate(withDuration: 1.5, animations: {
self.astro.transform = rot
}, completion: { (success) in
if success == true {
UIView.animate(withDuration: 1.5, animations: {
self.astro.transform = .identity
self.astro.frame.origin.x = -100.0
self.astro.transform = rot
})
}
})
I have an image that rotates but it stops abruptly. I'd like to add curveEaseOut to make it stop smoother, but when I add the animations: .curveEaseOut, I get an error.
func rotateRight () {
let rotation = 90.0
let transform = imageGearRight.transform
let rotated = transform.rotated(by: CGFloat(rotation))
UIView.animate(withDuration: 0.5, animations: .curveEaseOut) {
self.imageGearRight.transform = rotated
}
}
I keep getting an error:
Type '() -> Void' has no member 'curveEaseOut'
I've also tried this code, but I get an error also:
UIView.animate(withDuration: 0.5, animations: UIViewAnimationCurve.easeOut) {
self.imageGearRight.transform = rotated
}
Not sure what I am missing. Any help would be appreciated!!
If you want to specify .curveEaseOut you have to use a UIView method that takes options:
UIView.animate(withDuration: 0.5,
delay: 0,
options: [ .curveEaseOut ],
animations: {
self.imageGearRight.transform = rotated
},
completion: nil)
I have ImageView in my UIViewController:
And i want to animate this Image, periodically change width and height. The same animation you can see at Apple Wallet app on Iphone, if you click "Scan code". I tried a lot, but my code working incorrect or app begin lagging after 3-5 min...
This is my last code:
class ViewController: UIViewController {
#IBOutlet weak var focusImage: UIImageView!
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
self.resizeFocusImageUp()
}
func resizeFocusImageUp() {
UIView.animateWithDuration(2.0, delay: 0.0, options: UIViewAnimationOptions.CurveEaseIn, animations: {
self.focusImage.frame = CGRectMake(
self.focusImage.frame.origin.x+50,
self.focusImage.frame.origin.y-50,
self.focusImage.frame.size.width-50,
self.focusImage.frame.size.height+50
)
self.view.layoutIfNeeded()
self.view.bringSubviewToFront(self.focusImage)
}, completion: {(Bool) in
self.resizeFocusImageDown()
})
}
func resizeFocusImageDown() {
UIView.animateWithDuration(2.0, delay: 0.0, options: UIViewAnimationOptions.CurveEaseOut, animations: {
self.focusImage.frame = CGRectMake(
self.focusImage.frame.origin.x-50,
self.focusImage.frame.origin.y+50,
self.focusImage.frame.size.width+50,
self.focusImage.frame.size.height-50
)
self.view.layoutIfNeeded()
self.view.bringSubviewToFront(self.focusImage)
}, completion: {(Bool) in
self.resizeFocusImageUp()
})
}
}
Also, for my ImageView i use constraints:
As the other poster said, if you're using AutoLayout then you need to animate the constraints, not the frame.
Create constraints for the height & width of your view, and position if you need to move it in your animation. Then control-drag from your CONSTRAINTS into the header of your view controller to create outlets.
Then in your animation block change the constant value of each constraint, then call layoutIfNeeded to trigger the animation. (The critical part is that the call to layoutIfNeeded needs to be inside the animation block. It seems that what actually causes the constraint to change the size/position of the view(s).)
All that being said, for a line drawing like you show in your post, you'd be much better off using a CAShapeLayer and animating the path of the layer. You'd get much crisper-looking shapes, and the animations are very smooth.
//Below Objective-C code working correctly in my app. Do your stuff as per your requirements.
Note: If you are using autoalyout for that object(Image view) then add below two line code in view did load method.
imageView.translatesAutoresizingMaskIntoConstraints = YES;
imageView.frame = CGRectMake(x, y, width, height);
//Method For Zoom IN Animations Of View
-(void)ZoomInAnimationOfView{
imageView.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.01, 0.01);
[UIView animateWithDuration:1.0 animations:^{
imageView.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.0, 1.0);
} completion:^(BOOL finished) {
imageView.transform = CGAffineTransformIdentity;
}];
}
//Method For Zoom Out Animations
-(void)ZoomOutAnimationOfView{
imageView.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.0, 1.0);
[UIView animateWithDuration:1.0 animations:^{
imageView.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.001, 0.001);
} completion:^(BOOL finished) {
imageView.transform = CGAffineTransformIdentity;
}];
}
I try to scale a UIView with a circle shape to make it double in size when I click on it.
my final target is to reproduce the apple music behavior:
-When you click on a circle, it grows and pushes other circles around.
I m trying to achieve this with UIKit dynamics but the first problem is that animating a scale without CATransform (it doesn't work with collisions) fails.
at the end of the animation, even if width and height are 100,
the final shape is a rectangle...
here is my code
func ballTapped(sender:UITapGestureRecognizer) {
if sender.state == .Ended {
collision.removeItem(sender.view!)
let item = sender.view!
var theFrame = item.frame
theFrame.size.height = 100
theFrame.size.width = 100
UIView.animateWithDuration(0.5, animations: { () -> Void in
item.frame = theFrame
}, completion: { (Bool) -> Void in
self.collision.addItem(sender.view!)
}
)
}
}
[UIView animateWithDuration:0.5
animations:^{
[UIView animateWithDuration: 0.5 delay: 0.0 options:UIViewAnimationOptionAllowUserInteraction |UIViewAnimationOptionCurveEaseInOut animations:^{
_iCarouselCarVW.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.001, 0.001);
_iCarBackView.hidden = YES;
NSLog(#"%f",self.view.frame.size.width);
_iCarouselCenterConstant.constant = self.view.frame.size.width/2 + 50;
[self.iCarouselCarVW setCurrentItemIndex:0];
} completion:^(BOOL finished)
{
}];
[self.view layoutIfNeeded]; // Called on parent view
}];
I'm trying to rotate an UIImageView with the following code:
var x = -((self.needleImage.frame.size.width/2) - 15) //x for rotation point
UIView.animateWithDuration(5.0, delay: 10.0, options: nil, animations: {
var transform = CGAffineTransformMakeTranslation(x, 0)
transform = CGAffineTransformRotate(transform, CGFloat(-M_PI_2))
transform = CGAffineTransformTranslate(transform, -x, 0)
self.needleImage.transform = transformm
The end position is right, but during the animation/rotation, the image is shifted a little to the left before settling at the right place.
I tried the same code with a UIView from this and it doesn't do that.
Then I tried wrapping the Imageview inside a View and rotating that, but that didn't help either.
I have drawn a cicle ontop of the rotation point to check if it isn't in the right place, but it seems alright.
I've used this code snippet in the past to rotate a view perpetually, but by removing the last closure it should work to rotate an image 360 degrees. This can be adjusted, or course. Right now it's set to 2PI. You'll have to convert your rotation angle to radians.
func animateRotator() {
UIView.animateWithDuration(0.5, delay: 0, options: .CurveLinear, animations: { () -> Void in
self.rotator.transform = CGAffineTransformRotate(self.rotator.transform, CGFloat(M_PI_2))
}) { (finished) -> Void in
self.animateRotator()
}
}