i have a UIViewController which contains the 16 UIImageView now i have to annimate 4 images with Core Animation
any idea how to do this ?
i am able to animate the one only following is my code
CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:#"position"];
anim.fromValue = [NSValue valueWithCGPoint:CGPointMake(100, 100)];
anim.toValue = [NSValue valueWithCGPoint:CGPointMake(200, 200)];
anim.duration = 1.5f;
anim.repeatCount =1;
anim.removedOnCompletion = YES;
anim.autoreverses = YES;
anim.repeatCount = 10;
anim.timingFunction = [CAMediaTimingFunction
functionWithName:kCAMediaTimingFunctionEaseIn];
[imgview.layer addAnimation:anim forKey:#"position"];
Here's a theory solution in my mind, that in a loop from (1 to [yourImageArray count]) do load an imageView dynamically, load single image from yourImage array using index from that loop. Perform some animation using code on imageView.
UIImageViews are subclasses of UIView, which have the following method:
animateWithDuration:delay:options:animations:completion
You can use it in the following way:
[UIView animateWithDuration:1.5f
delay:0.0f
options:UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat
animations:^{
[UIView setAnimationRepeatCount:10];
[imgview1 setCenter:CGPointMake(200,200)];
[imgview2 setCenter:CGPointMake(300,200)];
[imgview3 setCenter:CGPointMake(400,200)];
[imgview4 setCenter:CGPointMake(500,200)];
};
completion:nil];
Related
In this code i am using animation.But at a time i need to change the image alpha value also.
-(void)animation
{
CGPoint point = CGPointMake(imgView.frame.origin.x, imgView.frame.origin.y);
imgView.layer.position = point;
CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:#"position.x"];
anim.fromValue = [NSValue valueWithCGPoint:point];
anim.toValue = [NSValue valueWithCGPoint:CGPointMake(point.x + 50, point.y)];
anim.duration = 10.0f;
anim.repeatCount =1;
anim.removedOnCompletion = YES;
anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
[imgView.layer addAnimation:anim forKey:#"position.x"];
imgView.layer.position = point;
}
You can use the opacity key of CABasicAnimation for doing this:
CABasicAnimation *alphaAnimation = [CABasicAnimation animationWithKeyPath:#"opacity"];
alphaAnimation.fromValue = [NSNumber numberWithFloat:1.0];
alphaAnimation.toValue = [NSNumber numberWithFloat:0.0];
[imgView.layer addAnimation:alphaAnimation forKey:#"opacity"];
Edit:
For animating through specified values you can use CAKeyframeAnimation:
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:#"opacity"];
animation.duration = 10.0f;
animation.repeatCount = 1;
animation.values = [NSArray arrayWithObjects:
[NSNumber numberWithFloat:1.0,
[NSNumber numberWithFloat:0.5],
[NSNumber numberWithFloat:1.0],nil];
animation.keyTimes = [NSArray arrayWithObjects:
[NSNumber numberWithFloat:0.0],
[NSNumber numberWithFloat:5.0],
[NSNumber numberWithFloat:10.0], nil];
[imgView.layer addAnimation:animation forKey:#"opacity"];
In order to decrease the alpha as the same time/rate the x position of your view is moving, just put the position setting code together with the alpha setting code in the same block of animation, like below:
CGPoint finalPoint = CGPointMake(500, imgView.center.y); //change for any final point you want
CGFloat finalAlpha = 0.0; //change the final alpha as you want
UIView animateWithDuration:1.0 animations:^{ //change the duration as you want
imgView.alpha = finalAlpha;
imgView.center = finalPoint;
}];
This "fades to invisible" self.view in 500ms.
Anything you do prior to invoking it will be set "immediately", everything you set within the `animation' block (like setting new frame coordinates) will be interpolated over the specified duration.
[UIView animateWithDuration:0.50
delay:0.0
options:( UIViewAnimationOptionAllowUserInteraction
| UIViewAnimationOptionBeginFromCurrentState
| UIViewAnimationOptionCurveEaseInOut)
animations:^ {
self.view.alpha = 0.0f ;
}
completion: ^(BOOL){
[self.view removeFromSuperview] ;
self.view = nil ;
}
] ;
You may use a CABasicAnimation object (a different one because you will animate a different KeyPath, namely alpha, for this) and use NSNumbers for fromValue and toValue.
Another (and easiest) way is to use the UIView helper methods dedicated to animation ( animateWithDuration:… and all), especially if you have to animate multiple properties at the same time (you may animate both the frame and the alpha with the same animation block if it fits your needs and simplify your code).
You can also mix CABasicAnimation for the frame and [UIView animateWithDuration:…] for the alpha, whatever combination you need depending on if your animations are complex and need to be customized (custom timing function, non-linear animation, …) or not.
//your code of changing x position will be here
now implement my code which is written below.
UIView animateWithDuration:1.0 animations:^{
imgView.alpha = 0.5;//must be in between 0 to 1
}];
now when your imageview move to next position as you are saying, write below code
//your code for imageview for next position..
now implement below code...
UIView animateWithDuration:0.5 animations:^{
imgView.alpha = 1.0;//must be in between 0 to 1
}];
let me know it is working or not!!!! Hope it helps...
Happy Coding!!!
Recently more and more apps are using new type of transition between views.
It's hard to define it but the transition looks like the preview view is fading out, going lower (downward translation) and scale down a little - all simultanously.
It's really subtle and elegant.
You can observe this transition in slow motion in Facebook app - find somebody's picture on the wall, tap to view it and then drag the fullscreen image down slowly and you will notice that the wall is rising from the back - fading and scaling a little bit. That's the transition.
Transition also envolves statusbar fading.
This transition is also present in Gmail 2.0 when you open settings from the left pane.
I think there is a certain framework or prepared method for this because more and more apps have this implemented.
But maybe I'm also wrong because I see some minor differences in some apps in the transition's trajectory - eg. Gmail uses a little carousel effect, but facebook just scales down to the middle.
Anyway it appears to be a new trend.
I'm looking for some reference or framework or know-how about implementing that sort of transitions.
Thanks for any useful stuff.
Try this link.I think this is the thing you are exactly looking for https://github.com/kentnguyen/KNSemiModalViewController
I first saw it used in the National Geographic apps... have a try with these two methods, the first 'drops it back' the second 'brings it back'. It's worked well for me in the past, just make a few adjustments to suit your needs.
- (void)dropItBack:(id)sender
{
// Position
CABasicAnimation *posAnimation = [CABasicAnimation animationWithKeyPath:#"position"];
posAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(160, 284)];//center point
// Opacity
CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:#"opacity"];
opacityAnimation.toValue = [NSNumber numberWithFloat:0.5f];
CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:#"transform.scale"];
scaleAnimation.toValue = [NSNumber numberWithDouble:0.8];
// Dramaticism of the Z rotation
// A lower number is more dramatic
float distance = 1000;
CATransform3D trans = CATransform3DIdentity;
trans.m34 = 1.f / -distance;
// Rotate Back
CABasicAnimation *rockBack = [CABasicAnimation animationWithKeyPath:#"transform"];
rockBack.toValue = [NSValue valueWithCATransform3D:CATransform3DRotate(trans, M_PI_4, 1.f, 0.f, 0.f)];
rockBack.beginTime = 0.f;
// Rotate forward
trans.m34 = 0.f;
CABasicAnimation *rockForward = [CABasicAnimation animationWithKeyPath:#"transform"];
rockForward.toValue = [NSValue valueWithCATransform3D:CATransform3DRotate(trans, M_PI_4, -1.f, 0.f, 0.f)];
rockForward.beginTime = 0.25f;
CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
animationGroup.duration = 0.5f;
animationGroup.repeatCount = 0.f;
animationGroup.removedOnCompletion = NO;
animationGroup.autoreverses = NO;
animationGroup.fillMode = kCAFillModeForwards;
animationGroup.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
[animationGroup setAnimations:[NSArray arrayWithObjects:rockBack, rockForward, scaleAnimation, posAnimation, opacityAnimation, nil]];
[self.navigationController.view.layer addAnimation:animationGroup forKey:nil];
popsheet = [UIButton buttonWithType:UIButtonTypeCustom];
[popsheet setBackgroundColor:[UIColor blueColor]];
[popsheet setFrame:CGRectMake(0, 580, 320, 400)];
[popsheet addTarget:self action:#selector(bringItForward:) forControlEvents:UIControlEventTouchUpInside];
[self.tabBarController.view addSubview:popsheet];
[UIView animateWithDuration:0.3 animations:^{
[popsheet setFrame: CGRectMake(0, 180, 320, 400)];
}];
}
- (void)bringItForward:(id)sender
{
// Position
CABasicAnimation *posAnimation = [CABasicAnimation animationWithKeyPath:#"position"];
posAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(160, 284)];
// Opacity
CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:#"opacity"];
opacityAnimation.toValue = [NSNumber numberWithFloat:1.f];
// Scale
CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:#"transform.scale"];
scaleAnimation.toValue = [NSNumber numberWithDouble:1.f];
// Dramaticism of the Z rotation
// A lower number is more dramatic
float distance = 1000;
CATransform3D trans = CATransform3DIdentity;
trans.m34 = 1.f / distance;
// Rotate back
CABasicAnimation *rockBack = [CABasicAnimation animationWithKeyPath:#"transform"];
rockBack.toValue = [NSValue valueWithCATransform3D:CATransform3DRotate(trans, M_PI_4, 1.f, 0.f, 0.f)];
rockBack.beginTime = 0.f;
// Rotate forward
trans.m34 = 0.f;
CABasicAnimation *rockForward = [CABasicAnimation animationWithKeyPath:#"transform"];
rockForward.toValue = [NSValue valueWithCATransform3D:CATransform3DRotate(trans, M_PI_4, -1.f, 0.f, 0.f)];
rockForward.beginTime = 0.25f;
CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
animationGroup.duration = 0.5f;
animationGroup.repeatCount = 0.f;
animationGroup.removedOnCompletion = NO;
animationGroup.autoreverses = NO;
animationGroup.fillMode = kCAFillModeForwards;
animationGroup.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
[animationGroup setAnimations:[NSArray arrayWithObjects:posAnimation, rockBack, rockForward, opacityAnimation, nil]];
[self.navigationController.view.layer addAnimation:animationGroup forKey:nil];
[UIView animateWithDuration:0.3 animations:^{
[popsheet setFrame: CGRectMake(0, 580, 320, 400)];
}];
}
I think you should try this library:
https://github.com/michaelhenry/MHFacebookImageViewer
I try to implement the animation:
when you enter iPhone Gallery, press the image, you see full-screen image. Below you can see toolbar with trash button. When you press this button, the image is being deleted with animation.
I try to implement this, but I don't know, how to implement the transform of image, apple use.
This is the best, I could do:
[UIView transitionWithView:self.view duration:0.1 options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
[self.view addSubview:scrollImageView];
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionAllowUserInteraction animations:^{
CGRect frame = scrollImageView.frame;
frame.size = CGSizeMake(frame.size.width * 0.75, frame.size.height * 0.75);
frame.origin = CGPointMake((size.width - frame.size.width) / 2, (size.height - frame.size.height) / 2);
scrollImageView.frame = frame;
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionAllowUserInteraction animations:^{
CGRect frame = scrollImageView.frame;
frame.size = CGSizeMake(frame.size.width * 0.05, frame.size.height * 0.05);
frame.origin = CGPointMake(size.width, size.height);
scrollImageView.frame = frame;
CGAffineTransform transform = scrollImageView.transform;
CGAffineTransform rotatedTransform = CGAffineTransformRotate(transform, 45 * 3.14 / 180);
scrollImageView.transform = rotatedTransform;
} completion:^(BOOL finished) {
[scrollImageView removeFromSuperview];
}];
}];
}];
Thank you in advance.
Update
As I understand, I can't do this animation with Core-Animation, but may anyone can advice me the animation the most simular to iPhone Gallery animation, but without using OpenGL?
You can use following example for this animation:
UIView *senderView = (UIView*)sender;
CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:#"transform"];
anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
anim.duration = 0.125;
anim.repeatCount = 1;
anim.autoreverses = YES;
anim.removedOnCompletion = YES;
anim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(1.2, 1.2, 1.0)];
//[senderView.layer addAnimation:anim forKey:nil];
UIBezierPath *movePath = [UIBezierPath bezierPath];
[movePath moveToPoint:icon.center];
[movePath addQuadCurveToPoint:senderView.center
controlPoint:CGPointMake(senderView.center.x, icon.center.y)];
CAKeyframeAnimation *moveAnim = [CAKeyframeAnimation animationWithKeyPath:#"position"];
moveAnim.path = movePath.CGPath;
moveAnim.removedOnCompletion = YES;
CABasicAnimation *scaleAnim = [CABasicAnimation animationWithKeyPath:#"transform"];
scaleAnim.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
scaleAnim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(0.1, 0.1, 1.0)];
scaleAnim.removedOnCompletion = YES;
CABasicAnimation *opacityAnim = [CABasicAnimation animationWithKeyPath:#"alpha"];
opacityAnim.fromValue = [NSNumber numberWithFloat:1.0];
opacityAnim.toValue = [NSNumber numberWithFloat:0.1];
opacityAnim.removedOnCompletion = YES;
CAAnimationGroup *animGroup = [CAAnimationGroup animation];
animGroup.animations = [NSArray arrayWithObjects:moveAnim, scaleAnim, opacityAnim, nil];
animGroup.duration = 0.5;
[icon.layer addAnimation:animGroup forKey:nil];
I have modified the code, you have to perform following changes in it, set the sender view as self.view, and change the ending point of animation (which is currently senderView.center) according to your requirement
I know its a bit late. But, you should check Ciechan's solution named BCGenieEffect. Can be found here. Its pure Core Animation and very easy to understand. I think that's what you are looking for.
Good luck
At this point the exact animation you are talking about cannot be done using Core Animation or UIKit. You would need to use OpenGL and apply the image as a texture and do your animation in there.
I think you are talking about the "suck" transition animation.
It is possible to trigger it, but it is a private transition, and Apple may reject your app if you use it.
This code should do it, using a transition code of 103:
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:1.0];
[UIView setAnimationTransition: transtionIndex forView:containerView cache:NO];
[containerView addSubview: newView];
[oldView removeFromSuperview];
[UIView commitAnimations];
Or search the net for a Core Image transition called "suckEffect"
I have this code.
UIImageView *sunrays = (UIImageView *)[self.view viewWithTag:1];
UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0,0,sunrays.frame.size.width,sunrays.frame.size.height)];
[container setClipsToBounds:YES];
[container addSubview:sunrays];
[sunrays setCenter:CGPointMake(container.bounds.size.width/2, container.bounds.size.height/2)];
[self.view addSubview:container];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:5];
CABasicAnimation *rotationAnimation;
rotationAnimation = [CABasicAnimation animationWithKeyPath:#"transform.rotation.z"];
rotationAnimation.toValue = [NSNumber numberWithFloat:M_PI * 2.0];
rotationAnimation.duration = 10;
rotationAnimation.cumulative = YES;
rotationAnimation.repeatCount = 10;
rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
[sunrays.layer addAnimation:rotationAnimation forKey:#"rotationAnimation"];
[UIView commitAnimations];
It runs correctly in an application with .xib file.
The same exactly code with storyboard doesn't run.
I insert QuartzCore.framework and CoreGraphics.framework.
Where is the problem? Any help...?
how to animate the uilabel view in such a way that it should keep moving from right side of the screen towards left ,
i have used the folloiwing code but it didnt work
UILabel * lbl =[UILabel alloc]init];
CALayer *cloud = [CALayer layer];
cloud.contents = lbl.text;
cloud.bounds = CGRectMake(0, 40, 100, 30);
cloud.position = CGPointMake(-45 ,30);
//cloud.position = CGPointMake(self.view.bounds.size.width / 2,cloudImage.size.height / 2);
[self.view.layer addSublayer:cloud];
CGPoint startPt = CGPointMake(self.view.bounds.size.width + cloud.bounds.size.width / 2,
cloud.position.y);
CGPoint endPt = CGPointMake(cloud.bounds.size.width / -2,
cloud.position.y);
CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:#"position"];
anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
anim.fromValue = [NSValue valueWithCGPoint:startPt];
anim.toValue = [NSValue valueWithCGPoint:endPt];
anim.repeatCount = 1;
anim.duration = 5.0;
[cloud addAnimation:anim forKey:#"position"];
It's a lot easier if you can use animateWithDuration in ios4
UILabel *label = //new label
[UIView animateWithDuration:1.0 animations:^{
label.frame = //new frame
}];
You can do it like this:
UILabel *label = [[UILabel alloc] initWithFrame:theRect];
[self.view addSubview:label];
[UIView animateWithDuration:0.5
delay:0.0
options:UIViewAnimationCurveEaseIn
animations:^{label.bounds = targetRect;}
completion:^(BOOL finished) { /* completion stuff */}];
There are more animate methods that take less parameters. You find them in the UIView documentation.