so here is my code :
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"path"];
animation.duration = 2.0;
animation.repeatCount = HUGE_VALF;
animation.autoreverses = YES;
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.fromValue = (id)boxPath;
animation.toValue = (id)roundPath;
[shapeLayer addAnimation:animation forKey:#"animatePath"];
`
I use this code in a UIKIT app but now I would like to use it on cocos2D, is there a way to do it ? please :) sorry for my english I'm french :/
Do you want to move one sprite to one location and back to place where you start???
If you want to do that this is some code :
id move = [CCMoveTo actionWithDuration:time position:ccp(x,y)];
[sprite runAction:[CCRepeatForever actionWithAction:[CCSequence actions:move, [move reverse], nil]]];
Related
Any idea why the small image that I move across the screen gets blurry?
While being in motion, the small details in the image become unclear and I think that it is a problem.
CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:#"position"];
anim.fromValue = [NSValue valueWithCGPoint:CGPointMake(px2.x, px2.y)];
anim.toValue = [NSValue valueWithCGPoint:CGPointMake(P3x, P3y)];
anim.duration = 1.5f;
anim.repeatCount =1;
anim.removedOnCompletion = YES;
anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
[LA addAnimation:anim forKey:#"position"];
Eventually this was identified as LCD panel lag.
So, I have read in the docs, that use of blocks like
beginAnimation
commitAnimation
is discouraged from os4.0.
So I have tried to get my code to work by using CABasicAnimation. I want to achieve, that an image's frame is resized from its thumbnail size, somewhere within my view, to a full width position e.g. (0, 120, 320, 240) - on my iPhone.
What I have so far:
[CATransaction begin];
[CATransaction setValue:[NSNumber numberWithFloat:1.0] forKey:kCATransactionAnimationDuration];
CABasicAnimation *scalingAnimation;
scalingAnimation = [CABasicAnimation animationWithKeyPath:#"transform"];
scalingAnimation.duration=1.0/2;
scalingAnimation.autoreverses=YES;
scalingAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
scalingAnimation.fromValue=[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 1.0, 1.0)];
scalingAnimation.toValue=[NSValue valueWithCATransform3D:CATransform3DMakeScale(4, 4, 1)];
[b.layer addAnimation:scalingAnimation forKey:#"scaling"];
[CATransaction commit];
My nextstep would be to first try to move the image to a centered position then scale it to the correct size. However, I doubt I'm doin it the right way. Can anyone comment on my code/approach.... is there a better way?
Am pretty sure you have solved this by now, but in any case.
You shouldn't need the [CATransaction begin]; and [CATransaction commit];
The simplest way that I have found to do this kind of thing is to use CAAnimationGroup and and add the animations one by one.
An example would be
CABasicAnimation *scaleX = [CABasicAnimation animationWithKeyPath:#"transform.scale.x"];
//this is not used, as the group provides the duration
scaleX.duration = duration;
scaleX.autoreverses = NO;
scaleX.toValue = [NSNumber numberWithFloat:1.0];
scaleX.fromValue = [NSNumber numberWithFloat:scaleFrom];
scaleX.fillMode = kCAFillModeForwards;
scaleX.removedOnCompletion = NO;
CABasicAnimation *scaleY = [CABasicAnimation animationWithKeyPath:#"transform.scale.y"];
//this is not used, as the group provides the duration
scaleY.duration = duration;
scaleY.autoreverses = NO;
scaleY.toValue = [NSNumber numberWithFloat:1.0];
scaleY.fromValue = [NSNumber numberWithFloat:scaleFrom];
scaleY.fillMode = kCAFillModeForwards;
scaleY.removedOnCompletion = NO;
//add in the translation animations
NSMutableArray* animationsArray = [NSMutableArray arrayWithObjects:scaleX,
scaleY,
//and any other animations you want in the group
nil];
CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
animationGroup.duration = 1.0/2;
animationGroup.timingFunction = [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseIn];
animationGroup.animations = animationsArray;
animationGroup.delegate = self;
animationGroup.removedOnCompletion = YES;
animationGroup.fillMode = kCAFillModeForwards;
[animationGroup setValue:#"imageTransform" forKey:#"AnimationName"];
[b.layer addAnimation:animationGroup forKey:#"imageTransform"];
There are a few gotchas though. Animations are purely visual, so before running the animations, set your eventual view frame.
You will notice that the scales end at 1, this is to ensure that you dont end up with a scaled image layer. Instead we start it scaled and bring it back to normal.
Translations should be done in the same way.
Hope this helps
//in Event Method Copy Below code to place the image to the center
CABasicAnimation* positionAnimation;
positionAnimation = [CABasicAnimation animationWithKeyPath:#"position"];
positionAnimation.fromValue = [NSValue valueWithCGPoint:imageView.layer.position];
positionAnimation.toValue = [NSValue valueWithCGPoint:centerPointofView];
positionAnimation.duration = 2.0;
positionAnimation.fillMode = kCAFillModeForwards;
positionAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
positionAnimation.removedOnCompletion = NO;
positionAnimation.delegate = self;
[imageView.layer addAnimation:positionAnimation forKey:#"positionAnimation"];
// For Scale After image is in center copy below code
- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag{
CAAnimation *animation = [imageView.layer animationForKey:#"positionAnimation"];
if (animation == theAnimation)
{
CABasicAnimation* scaleAnimation;
scaleAnimation = [CABasicAnimation animationWithKeyPath:#"transform.scale"];
scaleAnimation.fromValue = [NSNumber numberWithFloat:1];
scaleAnimation.toValue = [NSNumber numberWithFloat:4.0];
scaleAnimation.duration = 2.2;
scaleAnimation.fillMode = kCAFillModeForwards;
scaleAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
scaleAnimation.removedOnCompletion = NO;
scaleAnimation.delegate = self;
[imageView.layer addAnimation:scaleAnimation forKey:#"scaleAnimation"];
}
else
{
//if you want changes to image should remain forever
//place your code for scale & transform here
....................
//now simple remove animation from layer
[imageView.layer removeAllAnimations];
}
}
Cant you use
[UIView animateWithDuration:2.0
animations:^{
//animations
}
completion:^(BOOL finished){
// completion methods
}];
i am applying CABasicAnimation for position property of a layer it is animating well but after animation complete its coming back to original position how to avoid that and to make image to stay in animated position only?
There are a few different ways to solve this. My favorite is to set the object at the end of the animation, and use fromValue instead of toValue to create the animation. You can also set both fromValue and toValue to create this effect. ie
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"position"];
animation.duration = 1.0;
animation.fromValue = [NSValue valueWithCGPoint:startPoint];
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
viewToAnimate.center = endPoint;
[viewToAnimate.layer addAnimation:animation forKey:#"slide"];
The other way to do this is to set yourself as the delegate and implement:
-(void)animationDidStop:(id)sender finished:(BOOL)finished {
viewToAnimate.center = endPoint;
}
You need to set the final position. If you only use the animation fromValue and toValue it will snap back to the original starting point. The animation uses a copy of the view/layer as it "plays" and then the animation will show the original view/layer when it finishes.
If you don't explicitly set it, it will appear to snap back, even though the view/layer never really moved.
startPoint and endPoint are CGPoints and myView is the UIView that is being animated.
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"position"];
animation.duration = .3;
animation.fromValue = [NSValue valueWithCGPoint:startPoint];
animation.toValue = [NSValue valueWithCGPoint:endPoint];
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
[myView.layer addAnimation:animation forKey:#"position"];
myView.layer.position = endPoint; // Must set end position, otherwise it jumps back
To set the object at the end of the animation just write the code like this
#import <QuartzCore/QuartzCore.h>
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"position"];
animation.duration = 1.0;
animation.fromValue = [NSValue valueWithCGPoint:startPoint];
animation.timingFunction = [CAMediaTimingFunction functionWithName:easing];
animation.fillMode = kCAFillModeForwards; // This line will stop the animation at the end position of animation
animation.autoreverses = NO;
viewToAnimate.center = endPoint;
[viewToAnimate.layer addAnimation:animation forKey:#"slide"];
You can just set removedOnCompletion to NO if you want to preserve the final value. And don't forget to set the fillMode.
Swift 4+
animation.fillMode = .forwards;
animation.isRemovedOnCompletion = false
Objective-C
animation.fillMode = kCAFillModeForwards; //The receiver remains visible in its final state when the animation is completed.
animation.removedOnCompletion = NO;
If you look at the docs for addAnimation:forKey:, it says 'Typically this is implicitly invoked'. In other words, you're not supposed to call it directly. You're actually meant to do the following instead, which is even easier than setting from and to values, you simply set the values directly on the layer:
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"opacity"];
animation.duration = .3;
myLayer.actions = #{#"opacity": animation};
myLayer.opacity = 0;
This will fade a layer to zero opacity.
I want to load an animation image while running a function (like: loading....).
How can I do in iphone SDK?
Use CoreAmination.
self.layer.transform = CATransform3DRotate(self.layer.transform, M_PI, 0.f, 0.f, 1.f);
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"transform"];
animation.toValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
animation.autoreverses = NO;
animation.duration = 1.00;
//animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.repeatCount = HUGE_VALF;
[self.layer addAnimation:animation forKey:#"spinner"];
I want to rotate a layer continuously using byValue, but I can't make it work correctly.
I want to rotate by 6 degrees every second, to have a full rotation in 60 seconds.
If the initial rotation of the layer is 0, everything is OK.
The problem is when I try to set an initial fromValue. If I set the fromValue to 90 degrees, the animation will rotate from 90 to 90+6, then jump to 90+(90+6), animate, and jump again.
Any idea?
CABasicAnimation* animation = [CABasicAnimation animationWithKeyPath:#"transform.rotation.z"];
animation.fromValue = [NSNumber numberWithDouble:M_PI_2];
animation.byValue = [NSNumber numberWithDouble:6.0f*M_PI/180.0f];
animation.toValue = nil;
animation.fillMode = kCAFillModeForwards;
animation.cumulative = YES;
animation.additive = NO;
animation.repeatCount = 10000;
animation.removedOnCompletion = YES;
animation.duration = 1.0;
[myLayer addAnimation:animation forKey:#"transform"];
This works for me:
CABasicAnimation* animation = [CABasicAnimation animationWithKeyPath: #"transform"];
CATransform3D transform = CATransform3DMakeRotation (DegreesToRadians (90), 0, 0, 1);
animation.toValue = [NSValue valueWithCATransform3D: transform];
animation.duration = 60;
animation.cumulative = NO;
animation.repeatCount = 10000;
animation.removedOnCompletion = YES;