Can me explane how I can rotate image use anchor point like
https://www.dropbox.com/s/vh3h5cr1mkdbfh3/ex_image2.JPG
on .m
#import <QuartzCore/QuartzCore.h>
on .h
[UIView animateWithDuration:0.7f
delay:0
options:UIViewAnimationOptionCurveEaseOut
animations:^
{
self.center = position;
self.layer.anchorPoint = CGPointMake(-1, 0);
self.transform = CGAffineTransformMakeRotation(-5);
}
completion:^(BOOL completed){
}];
When I use this code I have something like that
https://www.dropbox.com/s/v87abux9dqm4y0p/ex_image1.JPG
When you apply a rotation transform to a layer, the rotation occurs around the anchor point.
So set the layer's anchor point to (0.0, 0.0) first.
self.layer.anchorPoint = CGPointMake(0.0f, 0.0f);
Then you can just rotate the view and the rotation will occur around the anchor point, (0.0, 0.0).
[UIView animateWithDuration:2.0f animations:^{
self.transform = CGAffineTransformMakeRotation(3.1415f);
}];
The code will rotate the view one whole time in the way you have pictured.
You can check out the section titled "Anchor Points Affect Geometric Manipulations" in Apple's "Core Animation Programming Guide" for more information.
Related
I want to apply an animation to two UIImageViews. The idea is for image one to flip horizontally by 90 degrees and then image two to complete the rotation. Think of it as a coin spinning: Head side (image one) faces forward -> turn 90 degrees -> Tail side (image two) rotates to face forward. I can do the first half of the animation but I am stuck on the second.
[UIView animateWithDuration:1.0f animations:^{
image1.transform = CGAffineTransformMakeScale(-0.01, 1);
} completion: ^(BOOL finished) {
// How can I make image 2 to rotate out as if it initially was already rotated by 90 degrees?
}];
for flipping animation, there a animation option called UIViewAnimationOptionTransitionFlipFromRight, use it with the UIView's animation method for example, like below for example
[UIView transitionWithView:myImageView //with first image
duration:animationDuration
options:UIViewAnimationOptionTransitionFlipFromRight
animations:^{
myImageView.image = toImage; //to next image
} completion:^(BOOL finished) {
//completion actions after flipped
}];
there are other animation options also there, like FromLeft,
FromTop,FromBottom use any one to your requirement
Take a look at this question about flipping a UIView in 3D using CATransform3D.
Simple Core Animations 3D transform of UIView
The answer:
CATransform3D rotationAndPerspectiveTransform = CATransform3DIdentity;
rotationAndPerspectiveTransform.m34 = 1.0 / -1000.0;
rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, M_PI * 0.6, 1.0f, 0.0f, 0.0f);
[UIView animateWithDuration:1.0 animations:^{
self.someView.layer.anchorPoint = CGPointMake(0.5, 0);
self.someView.layer.transform = rotationAndPerspectiveTransform;
} completion:^(BOOL finished){
// code to be executed when flip is completed
}];
I am making a card game and would like to use a Card flipping animation.
Currently I'm using this code with two images, front and back:
card, is a uiview with two UIImageView propertys
[UIView transitionWithView:card duration:0.65f
options:UIViewAnimationOptionTransitionFlipFromRight animations:^{
card.backImageView.image = card.frontImageView.image;
card.layer.shadowOpacity = 0.8;
} completion:^(BOOL finished){
card.layer.shadowOpacity = 0.0;
}];
In order to create a basic card flipping animation like the one in the video you've linked to, I suggest putting frontImageView and the backImageView directly on top of each other on the UIView you intend to flip. To start, set their images to front and back accordingly; and, in this particular case, hide the frontImageView and show the backImageView.
Assuming "card" is the UIView you intend to flip, to perform the flip try:
[UIView transitionWithView:card duration:0.65f
options:UIViewAnimationOptionTransitionFlipFromRight animations:^{
frontImageView.hidden = NO;
backImageView.hidden = YES;
} completion:^(BOOL finished) {
// whatever you'd like to do immediately after the flip completes
}];
Edit:
And to handle the shadow, first off, it appears in the video you posted that the shadow grows in length moreso than it just fades in. And it seems as if (and makes logical sense that) the shadow reaches its peak during the middle of the animation as the card is lifted at its highest point. Since the shadow grows then shrinks during the course of the flip animation, it doesn't make sense to include the shadow animation within the same animation block as the flip since they're on different time schedules.
Secondly with regard to the shadow, to animate the layer property, you have to use Core Animations.
Perhaps you can run the two animations concurrently, i.e. while the above animation is performing, also do something like:
CABasicAnimation *shadowAnimation = [CABasicAnimation animationWithKeyPath:#"shadowRadius"];
shadowAnimation.delegate = self;
[shadowAnimation setFromValue:[NSNumber numberWithFloat:3.0]];
[shadowAnimation setToValue:[NSNumber numberWithFloat:10.0]];
[shadowAnimation setDuration:0.65f];
shadowAnimation.autoreverses = YES;
[[card layer] addAnimation:shadowAnimation forKey:#"shadowRadius"];
The last portion has been adapted from this code and takes advantage of the autoreverse property to automatically reverse the shadow's growth.
This is how to perform a card flipping animation in swift 3:
UIView.transition(from: frontImageView,
to: backImageView,
duration: 0.65,
options: .transitionFlipFromRight,
completion: nil)
i tested a few things, and Compromise with this:
_tempTransform = card.transform;
[card loadFront];//loads the front image.
card.frontImageView.hidden=YES;
[UIView animateWithDuration:0.02f
delay:0.0
options:UIViewAnimationOptionCurveEaseOut
animations:^{
CATransform3D transform = CATransform3DIdentity;
transform.m34 = 1.0 / -500;
transform = CATransform3DRotate(transform, 15.0f * M_PI / 180.0f, 0, -1, 0.0f);
card.layer.transform = transform;
}completion:^(BOOL done){
card.layer.shadowOpacity=0.1f;
card.transform=CGAffineTransformScale(card.transform, 1.2f, 1.2f);
[UIView transitionWithView:card duration:0.4f
options:UIViewAnimationOptionTransitionFlipFromRight animations:^{
card.frontImageView.hidden=NO;
card.backImageView.hidden=YES;
} completion:^(BOOL finished){
card.layer.shadowOpacity=0.0f;
card.transform=_tempTransform;
}];
}];
Good evening,
I scale down a UIView by using CGAffineTransformScale.
[UIView animateWithDuration:0.3 animations:^{
gridContainerView.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.2, 0.2);
gridContainerView.alpha = 0.0;
} completion:^(BOOL finished) {
// show UIView B
}];
and scale it back to its original size:
[UIView animateWithDuration:0.3 animations:^{
gridContainerView.transform = CGAffineTransformIdentity;
gridContainerView.alpha = 1.0;
} completion:^(BOOL finished) {
// remove UIView B
}];
This works fine. The gridContainerView get scaled down to the center of the screen. However, if I change the devices orientation (to a.e. landscape) the center is somehow shifted to the bottom left. The transformation is not going to the center of the screen anymore once I change orientation.
The only way to fix this is to release the gridContainerView and reallocate/init it. But unfortunately this is not an option for me at this point.
Any help is truly appreciated.
I have a CATransform3D Animation designed to replace the Push animation currently being used in my app. Currently, it rotates as if the X axis were in the centre of the layer/view. However, I want the X axis to be at the edge of the screen so it flips out of the screen. My current code is: -
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
CATransform3D rotationAndPerspectiveTransform = CATransform3DIdentity;
rotationAndPerspectiveTransform.m34 = 1.0 / 500;
rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, 1.57, 0, 1, 0);
self.view.layer.transform = rotationAndPerspectiveTransform;
[UIView commitAnimations];
I'm new to Core Graphics and such, so any pointers, tips, where I'm going wrong will be greatly appreciated!
You should change the anchorPoint of the layer. Use the following piece of code before beginAnimations:context: method.
CGRect frame = self.view.layer.frame;
self.view.layer.anchorPoint = CGPointMake(1.f, 0.5f);
self.view.layer.frame = frame;
This will change the anchorPoint of the layer without changing the layer position. The rotation animation will be done around the axis that passes from the anchor point.
I'm trying to implement the following animation:
yourSubView.transform = CGAffineTransformMakeScale(0.01, 0.01);
[UIView animateWithDuration:0.4 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
//change time duration according to requirement
// animate it to the identity transform (100% scale)
yourSubView.transform = CGAffineTransformIdentity;
} completion:^(BOOL finished){
// if you want to do something once the animation finishes, put it here
}];
combined with some movement of the subview. I know in core animation you can combine animations but how can you do that in UIView animation?
Can I translate this code from UIView animation to Core animation?
yourSubView.transform = CGAffineTransformMakeScale(0.01, 0.01);
[UIView animateWithDuration:0.4 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
//change time duration according to requirement
// animate it to the identity transform (100% scale)
yourSubView.transform = CGAffineTransformIdentity;
} completion:^(BOOL finished){
// if you want to do something once the animation finishes, put it here
}];
You can combine animations by changing more than one animatable property. For example, you can also set yourSubView.alpha, then change the alpha within the animation block. It will combine the scale and alpha change together.
To do a simple translation, try this in your animation block:
yourSubView.transform = CGAffineTransformTranslate(CGAffineTransformIdentity, 100.0, 100.0);
this should set the scale back to identity along with moving 100px in x and y direction.
For Core Animation, this Grouping two Core Animations with CAAnimationGroup causes one CABasicAnimation to not run should get you started. You'll use a CAAnimationGroup to combine multiple animations, and can do pretty fancy stuff including 3D rotation.
Scaling:
CAKeyframeAnimation *scale = [CAKeyframeAnimation animationWithKeyPath:#"transform.scale"];
[scale setValues:[NSArray arrayWithObjects:[NSNumber numberWithFloat:0.01f],[NSNumber numberWithFloat:1.0f],nil]];
[scale setKeyTimes:[NSArray arrayWithObjects:[NSNumber numberWithFloat:0.0],[NSNumber numberWithFloat:0.4f],nil]];
[mySubview.layer addAnimation:scale forKey:#"myScale"];