Setup animation:
CABasicAnimation *noteAnimation = [CABasicAnimation animation];
noteAnimation.keyPath = #"position.x";
noteAnimation.byValue = [NSNumber numberWithFloat:CGRectGetWidth(self.view.frame) - 50];
noteAnimation.duration = 1.f;
noteAnimation.fillMode = kCAFillModeBoth;
noteAnimation.removedOnCompletion = NO;
noteAnimation.autoreverses = YES;
noteAnimation.repeatCount = HUGE;
noteAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
[self.greenSquareView.layer addAnimation:noteAnimation forKey:#"noteAnimation"];
To pause the acting animation I use:
CFTimeInterval pausedTime = [view.layer convertTime:CACurrentMediaTime() fromLayer:nil];
view.layer.speed = 0.0;
view.layer.timeOffset = pausedTime;
But in this case view stops with bouncing.
Full project on BitBucket.
Related
CATextLayer foregroundColor animation don't work on iOS9 but work normal on iOS10 or high version! I don't know what's wrong with my code!
Code as follow:
- (void)addAnimationOnLayer:(CATextLayer*)layer{
CABasicAnimation *colorAn = [CABasicAnimation animationWithKeyPath:#"foregroundColor"];
colorAn.fromValue = (id)NeColor333333.CGColor;
colorAn.toValue = (id)NeColor999999.CGColor;
CABasicAnimation *sizeAn = [CABasicAnimation animationWithKeyPath:#"fontSize"];
sizeAn.fromValue = #16.0;
sizeAn.toValue = #12.0;
CAKeyframeAnimation *keyAn = [CAKeyframeAnimation animationWithKeyPath:#"position"];
keyAn.values = #[[NSValue valueWithCGPoint:layer.position],[NSValue valueWithCGPoint:CGPointMake(layer.position.x, layer.position.y - 16)]];
keyAn.keyTimes =#[#0.0,#1.0];
CAAnimationGroup *group = [CAAnimationGroup animation];
group.animations = #[colorAn, keyAn, sizeAn];
group.duration = 0.4;
group.repeatCount = 1;
group.fillMode = kCAFillModeForwards;
group.removedOnCompletion = NO;
[layer addAnimation:group forKey:nil];
}
You can add a CALayer, and set CALayer mask is a CATextLayer, you an change CALayer backgroundColor with animation.
I'm trying to animate a pulsting circle. But after the downward scale, there's something of a flickering effect. Any ideas to why that is? Here's my code so far:
- (instancetype)init
{
self = [super init];
if (self) {
if (!self.path) {
self.path = [UIBezierPath bezierPathWithArcCenter:CGPointMake(0, 0) radius:7 startAngle:0.0*(M_PI/180.0) endAngle:360.0*(M_PI/180.0) clockwise:YES].CGPath;
}
[self animateCircleUpward];
}
return self;
}
-(void)animateCircleUpward {
[CATransaction begin];
[CATransaction setCompletionBlock:^{[self animateCircleDownward];}];
CABasicAnimation * scaleUpwardAnimation = [CABasicAnimation animationWithKeyPath:#"transform.scale.xy"];
scaleUpwardAnimation.fromValue = #(0.7);
scaleUpwardAnimation.toValue = #(1.0);
CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:#"opacity"];
opacityAnimation.fromValue = #(1.0);
opacityAnimation.toValue = #(0.6);
self.fillColor = [UIColor greenColor].CGColor;
CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
NSArray *animations = #[scaleUpwardAnimation, opacityAnimation];
animationGroup.duration = 0.4;
animationGroup.animations = animations;
[self addAnimation:animationGroup forKey:#"pulse"];
[CATransaction commit];
}
-(void)animateCircleDownward {
[CATransaction begin];
[CATransaction setCompletionBlock:^{[self animateCircleUpward];}];
CABasicAnimation * scaleDownwardAnimation = [CABasicAnimation animationWithKeyPath:#"transform.scale.xy"];
scaleDownwardAnimation.fromValue = #(1.0);
scaleDownwardAnimation.toValue = #(0.7);
CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:#"opacity"];
opacityAnimation.fromValue = #(0.6);
opacityAnimation.toValue = #(1.0);
self.fillColor = [UIColor greenColor].CGColor;
CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
NSArray *animations = #[scaleDownwardAnimation, opacityAnimation];
animationGroup.duration = 0.4;
animationGroup.animations = animations;
[self addAnimation:animationGroup forKey:#"pulse"];
[CATransaction commit];
}
#end
Thanx in advance!
In regards to your actual question you likely need to set your CAAnimationGroup's fillMode property to kCAFillModeForward. The default value is kCAFillModeRemoved, so you are likely glimpsing the non-presentation layer between calls back and forth from your Down and Up methods.
That said, it appears that what you're trying to create is a cyclic animation through back and forth calls between your Up and Down methods via CATransaction's completionBlock. This seems an incredibly inefficient approach; why not try something more like:
-(void)scaleAndOpacityAnimations
{
CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:#"transform.scale.xy”];
scaleAnimation.fromValue = #(0.7f);
scaleAnimation.toValue = #(1.0f);
CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:#“opacity”];
opacityAnimation.fromValue = #(1.0f);
opacityAnimation.toValue = #(0.6f);
CAAnimationGroup *scaleAndOpacity = [CAAnimationGroup animation];
scaleAndOpacity.animations = #[scaleAnimation, opacityAnimation];
scaleAndOpacity.autoReverses = YES;
scaleAndOpacity.repeatCount = HUGE_VALF;
//OP had no value indicated for the duration in posted code, I’m including it here for completion
scaleAndOpacity.duration = 0.5f;
[self addAnimation:scaleAndOpacity forKey:#“pulse”];
}
Which will simply repeat infinitely many times without having to instantiate new CAAnimations on each cycle.
I implemented corePlot in xcode and I'm using the pie chart. I'm trying to create a 3d flip animation while the chart reloads. Here is the code:
CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:#"transform.scale.x"];
scaleAnimation.fromValue = [NSNumber numberWithFloat:1.0];
scaleAnimation.toValue = [NSNumber numberWithFloat:0.5];
scaleAnimation.duration = 1.0f;
scaleAnimation.removedOnCompletion = NO;
[self.pieChart addAnimation:scaleAnimation forKey:#"scale"];
[self.pieChart reloadData];
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"transform.scale.x"];
animation.fromValue = [NSNumber numberWithFloat:0.5];
animation.toValue = [NSNumber numberWithFloat:1.0];
animation.duration = 1.0f;
[self.pieChart addAnimation:animation forKey:#"scale"];
I didn't get desirable effects. I think what's happening is, both animations are happening at once. (Though I'm not sure that is what's happening.)
Also, is it possible to add z-depth? If so, how?
Update
I tried the follwoing:
CABasicAnimation *currentAnition = (CABasicAnimation *)anim;
if (currentAnition == self.scaleAnimation {...}
And it didn't work.
CAAnimation is KVC compliant, so we can store whether you're starting or finishing for lookup in the delegate methods:
{
CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:#"transform.scale.x"];
[scaleAnimation setValue:#(YES) forKey:#"scaleAnimation"];
// set the delegate
scaleAnimation.delegate = self;
scaleAnimation.fromValue = [NSNumber numberWithFloat:1.0];
scaleAnimation.toValue = [NSNumber numberWithFloat:0.5];
scaleAnimation.duration = 1.0f;
scaleAnimation.removedOnCompletion = NO;
[self.pieChart addAnimation:scaleAnimation forKey:#"scale"];
[self.pieChart reloadData];
}
- (void)runSecondAnimation
{
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"transform.scale.x"];
[animation setValue:#(YES) forKey:#"secondAnimation"];
animation.delegate = self;
animation.fromValue = [NSNumber numberWithFloat:0.5];
animation.toValue = [NSNumber numberWithFloat:1.0];
animation.duration = 1.0f;
[self.pieChart addAnimation:animation forKey:#"scale"];
}
/* Called when the animation either completes its active duration or
* is removed from the object it is attached to (i.e. the layer). 'flag'
* is true if the animation reached the end of its active duration
* without being removed. */
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
BOOL scaleAnimation = [[anim valueForKey:#"scaleAnimation"] boolValue];
if (scaleAnimation) {
[self runSecondAnimation];
}
BOOL secondAnimation = [[anim valueForKey:#"secondAnimation"] boolValue];
if (secondAnimation) {
[self runThirdAnimation];
}
}
And remember you have also:
/* Called when the animation begins its active duration. */
- (void)animationDidStart:(CAAnimation *)anim;
I'm trying to repeat a sequence of animations, inside a LOOP, changing at each loop some parameters randomly. Here is the code. Anyone please knows why it doesn't work?
If I call it once with a button action, it works, but with a loop it doesn't.
Thanks a lot! Giuseppe
-(IBAction)startLoop:(id)sender {
for (int i=1;i<10; i++) {
[self animation2];
}
}
-(id) animation2 {
int max=500;
UIImage *myImage = [UIImage imageNamed:#"coccinella2.png"];
CALayer *myLayer = [CALayer layer];
myLayer.contents = (id)myImage.CGImage;
myLayer.bounds = CGRectMake(0, 0, 50, 60);
[myLayer setPosition:CGPointMake(arc4random()%(max), arc4random()%(max))];
[myLayer setBounds:CGRectMake(0.0, 0.0, 50.0, 60.0)];
[self.view.layer addSublayer:myLayer];
//translation1
CGPoint startPt = CGPointMake(arc4random()%(max),arc4random()%(max));
CGPoint endPt = CGPointMake(arc4random()%(max),arc4random()%(max));
CABasicAnimation *transl1 = [CABasicAnimation animationWithKeyPath:#"position"];
transl1.removedOnCompletion = FALSE;
transl1.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
transl1.fromValue = [NSValue valueWithCGPoint:startPt];
transl1.toValue = [NSValue valueWithCGPoint:endPt];
transl1.duration = 2.0;
transl1.fillMode = kCAFillModeForwards;
transl1.beginTime = 0;
//scale 1
CABasicAnimation *scale1 = [CABasicAnimation
animationWithKeyPath:#"transform.scale"];
scale1.removedOnCompletion = FALSE;
[scale1 setToValue:[NSNumber numberWithInt:3]];
[scale1 setDuration:2.0f];
scale1.fillMode = kCAFillModeForwards;
scale1.beginTime = 0;
//rotation1
CABasicAnimation *rotation1 = [CABasicAnimation
animationWithKeyPath:#"transform.rotation.z"];
rotation1.removedOnCompletion = FALSE;
[rotation1 setFromValue:DegreesToNumber(0)];
[rotation1 setToValue:DegreesToNumber(90)];
//rotation1.repeatCount = HUGE_VALF;
[rotation1 setDuration:2.0f];
rotation1.fillMode = kCAFillModeForwards;
rotation1.beginTime = 0;
//group
CAAnimationGroup* group = [CAAnimationGroup animation];
[group setDuration: 6.0];
group.removedOnCompletion = FALSE;
group.fillMode = kCAFillModeForwards;
[group setAnimations: [NSArray arrayWithObjects:scale1, transl1, rotation1, nil]];
[myLayer addAnimation: group forKey: nil];
}
Your code doesn't repeat the annotation 10 times but starts 10 animations right away. If your goal is to start the animations after the previous one ended you should try using an NSTimer.
You can use an NSTimer to trigger each group of animations at a different time, or you can set the beginTime on each group, with code like this:
group.beginTime = CACurrentMediaTime() + delay;
For animations, using the beginTime gives more accurate timing, since CA is run on a separate thread and doesn't stall like NSTimers if your app gets busy.
I have some problem with CABasicAnimation. It`s similar to that post: CABasicAnimation rotate returns to original position
So, i have uiimageview that rotate in touchMove. In touchEnd invoke method that do "animation of inertia" :
-(void)animationRotation: (float)beginValue
{
CABasicAnimation *anim;
anim = [CABasicAnimation animationWithKeyPath:#"transform.rotation"];
anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
anim.duration = 0.5;
anim.repeatCount = 1;
anim.fillMode = kCAFillModeForwards;
anim.fromValue = [NSNumber numberWithFloat:beginValue];
[anim setDelegate:self];
anim.toValue = [NSNumber numberWithFloat:(360*M_PI/180 + beginValue)];
[appleView.layer addAnimation:anim forKey:#"transform"];
CGAffineTransform rot = CGAffineTransformMakeRotation(360*M_PI/180 + beginValue);
appleView.transform = rot;
}
This animation works fine, but if I invoke touchBegan before animationRotation ended, angle of rotation is beginValue. I need cath current angle of rotation. As an experiment, i declare method
-(vod) animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
{
NSLog(#"Animation finished!");
}
and it's seems working. but I don't know how get that value of angle or CGAffineTransform for my UIImageView in animationDidStop.
It's even possible to do? Thanks.
you should use presentationLayer method to get layer properties during animation in flight.
so your code should be like this,
#define RADIANS_TO_DEGREES(__ANGLE__) ((__ANGLE__) / (float)M_PI * 180.0f)
-(void)animationRotation: (float)beginValue
{
CABasicAnimation *anim;
anim = [CABasicAnimation animationWithKeyPath:#"transform.rotation.z"];
anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
anim.duration = 0.5;
anim.repeatCount = 1;
anim.fillMode = kCAFillModeForwards;
anim.fromValue = [NSNumber numberWithFloat:beginValue];
[anim setDelegate:self];
//get current layer angle during animation in flight
CALayer *currentLayer = (CALayer *)[appleView.layer presentationLayer];
float currentAngle = [(NSNumber *)[currentLayer valueForKeyPath:#"transform.rotation.z"] floatValue];
currentAngle = roundf(RADIANS_TO_DEGREES(currentAngle));
NSLog(#"current angle: %f",currentAngle);
anim.toValue = [NSNumber numberWithFloat:(360*M_PI/180 + beginValue)];
[appleView.layer addAnimation:anim forKey:#"transform"];
CGAffineTransform rot = CGAffineTransformMakeRotation(360*M_PI/180 + beginValue);
appleView.transform = rot;
}