Shake visual effect on iPhone (NOT shaking the device)

Question

On login failure, I'd prefer to avoid showing an alert, it's too fleeting. Showing the alert and then showing the text somewhere on the login screen seems like duplication.

So I'd like for it to graphically shake my login view when the user enters the wrong user ID and password like the Mac login screen does.

Anyone know if there's a way to pull this off, or have any suggestions for another effect I could use?

5 yrs later .. http://stackoverflow.com/questions/24356051 – Fattie Jun 22 '14 at 21:52 — Fattie, Jun 22 '14 at 21:52

nielsbot · Accepted Answer · 2016-12-05T00:58:40.873

I think this is a more efficient solution:

Swift:

let anim = CAKeyframeAnimation( keyPath:"transform" )
anim.values = [
    NSValue( CATransform3D:CATransform3DMakeTranslation(-5, 0, 0 ) ),
    NSValue( CATransform3D:CATransform3DMakeTranslation( 5, 0, 0 ) )
]
anim.autoreverses = true
anim.repeatCount = 2
anim.duration = 7/100

viewToShake.layer.addAnimation( anim, forKey:nil )

Obj-C:

CAKeyframeAnimation * anim = [ CAKeyframeAnimation animationWithKeyPath:@"transform" ] ;
anim.values = @[ 
    [ NSValue valueWithCATransform3D:CATransform3DMakeTranslation(-5.0f, 0.0f, 0.0f) ], 
    [ NSValue valueWithCATransform3D:CATransform3DMakeTranslation( 5.0f, 0.0f, 0.0f) ] 
] ;
anim.autoreverses = YES ;
anim.repeatCount = 2.0f ;
anim.duration = 0.07f ;

[ viewToShake.layer addAnimation:anim forKey:nil ] ;

Only one animation object is created and it's all performed at the CoreAnimation level.

score 59 · Answer 2 · answered May 11 '11 at 07:40

59

Using iOS 4+ block based UIKit animations (and loosely based on on jayccrown's answer):

- (void)shakeView:(UIView *)viewToShake
{
    CGFloat t = 2.0;
    CGAffineTransform translateRight  = CGAffineTransformTranslate(CGAffineTransformIdentity, t, 0.0);
    CGAffineTransform translateLeft = CGAffineTransformTranslate(CGAffineTransformIdentity, -t, 0.0);

    viewToShake.transform = translateLeft;

    [UIView animateWithDuration:0.07 delay:0.0 options:UIViewAnimationOptionAutoreverse|UIViewAnimationOptionRepeat animations:^{
        [UIView setAnimationRepeatCount:2.0];
        viewToShake.transform = translateRight;
    } completion:^(BOOL finished) {
        if (finished) {
            [UIView animateWithDuration:0.05 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
                viewToShake.transform = CGAffineTransformIdentity;
            } completion:NULL];
        }
    }];
}

answered May 11 '11 at 07:40

Chris Miles

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4

This should be the top answer to the question, since all of the above answers will not work properly (without modifications or omitting the view parameter) with ARC turned on. Use blocks! – Jens Kohl Sep 09 '11 at 11:22
yup, this is the better answer, you might not want to check `finished` though, otherwise you may end up with an odd transform – slf Feb 21 '12 at 17:26
2

You can do this w just a single autoreversing animation--no need for completion blocks. (I posted code below) – nielsbot Jun 27 '12 at 17:54
1

This had a quirk in my case where another view was being shaken at the same time. The CAKeyframeAnimation answer below @nielsbot worked perfectly for me. – Diego Barros Oct 25 '13 at 03:01

jayccrown · Answer 3 · 2009-12-03T08:36:28.333

I had seen some wobble animation and changed it to shake a view t pixels upright and downleft:

- (void)earthquake:(UIView*)itemView
{
    CGFloat t = 2.0;

    CGAffineTransform leftQuake  = CGAffineTransformTranslate(CGAffineTransformIdentity, t, -t);
    CGAffineTransform rightQuake = CGAffineTransformTranslate(CGAffineTransformIdentity, -t, t);

    itemView.transform = leftQuake;  // starting point

    [UIView beginAnimations:@"earthquake" context:itemView];
    [UIView setAnimationRepeatAutoreverses:YES]; // important
    [UIView setAnimationRepeatCount:5];
    [UIView setAnimationDuration:0.07];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(earthquakeEnded:finished:context:)];

    itemView.transform = rightQuake; // end here & auto-reverse

    [UIView commitAnimations];
}

- (void)earthquakeEnded:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context 
{
    if ([finished boolValue]) 
    {
        UIView* item = (UIView *)context;
        item.transform = CGAffineTransformIdentity;
    }
}

score 8 · Answer 4 · answered Oct 27 '09 at 17:44

8

Here's a tutorial that details how to do it in Cocoa. Should be the same for the iPhone (or at least quite similar).

http://www.cimgf.com/2008/02/27/core-animation-tutorial-window-shake-effect/

answered Oct 27 '09 at 17:44

Justin Gallagher

3,242
21
25

score 6 · Answer 5 · answered Oct 27 '09 at 17:42

Simply changing the X coordinate of the center property of your view might do the trick. If you haven't done any core animation before it's pretty straight-forward.

First, start an animation right, then listen for it to finish, and then move back to the left, and so on. Getting the timing down so it "feels right" might take a while.

- (void)animationFinishCallback:(NSString *)animationID finished:(BOOL)finished context:(void *)context
{
  if ([animationID isEqualToString:@"MoveRight"]) {
    [UIView beginAnimations:@"MoveLeft" context:NULL];
    [UIView setAnimationDuration:1.0];
    [UIView setAnimationDelay: UIViewAnimationCurveEaseIn];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(animationFinishCallback:finished:context:)];

    myView.center = CGRectMake(newX, newY);
    [UIView commitAnimations];
  }
}

You could also create an animation and apply it to the view's `CALayer`. This would let you use, for example, a `CAKeyframeAnimation` which would let you fine-tune the animation. For an animation like this, you'll probably need that level of flexibility. — Alex, Oct 27 '09 at 17:44
see my answer below--it uses a single CoreAnimation animation which is automatically removed when the animation completes... no need for callbacks or multiple animate blocks — nielsbot, Feb 21 '12 at 02:15

JakubKnejzlik · Answer 6 · 2012-04-05T04:57:55.257

This UIView category snippet worked for me. It's using 3 CABasingAnimations applied to view's layer.

#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>

#define Y_OFFSET 2.0f
#define X_OFFSET 2.0f
#define ANGLE_OFFSET (M_PI_4*0.1f)

@interface UIView (shakeAnimation)

-(BOOL)isShakeAnimationRunning;
-(void)startShakeAnimation;
-(void)stopShakeAnimation;

@end



@implementation UIView (shakeAnimation)

-(BOOL)isShakeAnimationRunning{
     return [self.layer animationForKey:@"shake_rotation"] != nil;
}

-(void)startShakeAnimation{
    CFTimeInterval offset=(double)arc4random()/(double)RAND_MAX;
    self.transform=CGAffineTransformRotate(self.transform, -ANGLE_OFFSET*0.5);
    self.transform=CGAffineTransformTranslate(self.transform, -X_OFFSET*0.5f, -Y_OFFSET*0.5f);

    CABasicAnimation *tAnim=[CABasicAnimation animationWithKeyPath:@"position.x"];
    tAnim.repeatCount=HUGE_VALF;
    tAnim.byValue=[NSNumber numberWithFloat:X_OFFSET];
    tAnim.duration=0.07f;
    tAnim.autoreverses=YES;
    tAnim.timeOffset=offset;
    [self.layer addAnimation:tAnim forKey:@"shake_translation_x"];

    CABasicAnimation *tyAnim=[CABasicAnimation animationWithKeyPath:@"position.y"];
    tyAnim.repeatCount=HUGE_VALF;
    tyAnim.byValue=[NSNumber numberWithFloat:Y_OFFSET];
    tyAnim.duration=0.06f;
    tyAnim.autoreverses=YES;
    tyAnim.timeOffset=offset;
    [self.layer addAnimation:tyAnim forKey:@"shake_translation_y"];

    CABasicAnimation *rAnim=[CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    rAnim.repeatCount=HUGE_VALF;
    rAnim.byValue=[NSNumber numberWithFloat:ANGLE_OFFSET];
    rAnim.duration=0.15f;
    rAnim.autoreverses=YES;
    rAnim.timeOffset=offset;
    [self.layer addAnimation:rAnim forKey:@"shake_rotation"];
}
-(void)stopShakeAnimation{
    [self.layer removeAnimationForKey:@"shake_translation_x"];
    [self.layer removeAnimationForKey:@"shake_translation_y"];
    [self.layer removeAnimationForKey:@"shake_rotation"];
    [UIView animateWithDuration:0.2f animations:^{
        self.transform=CGAffineTransformRotate(self.transform, ANGLE_OFFSET*0.5);
        self.transform=CGAffineTransformTranslate(self.transform, X_OFFSET*0.5, Y_OFFSET*0.5f);
    }];
}

@end

Hope it helpes someone :)

score 2 · Answer 7 · answered Sep 08 '14 at 08:53

In iOS 7.0 or later, UIKit keyframe animation is available.

[UIView animateKeyframesWithDuration:0.5 delay:0.0 options:0 animations:^{
    [UIView setAnimationCurve:UIViewAnimationCurveLinear];

    NSInteger repeatCount = 8;
    NSTimeInterval duration = 1.0 / (NSTimeInterval)repeatCount;

    for (NSInteger i = 0; i < repeatCount; i++) {
        [UIView addKeyframeWithRelativeStartTime:i * duration relativeDuration:duration animations:^{
            CGFloat dx = 5.0;
            if (i == repeatCount - 1) {
                viewToShake.transform = CGAffineTransformIdentity;
            } else if (i % 2) {
                viewToShake.transform = CGAffineTransformTranslate(CGAffineTransformIdentity, -dx, 0.0);
            } else {
                viewToShake.transform = CGAffineTransformTranslate(CGAffineTransformIdentity, +dx, 0.0);
            }
        }];
    }
} completion:completion];

pasawaya · Answer 8 · 2012-06-20T03:53:36.613

I know the question is already answered, but since I have already implemented something like this previously, I feel it can't hurt to add it:

CAKeyframeAnimation *shakeAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.rotation.z"];
NSArray *transformValues = [NSArray arrayWithObjects:
                        [NSNumber numberWithFloat:((M_PI)/64)],
                        [NSNumber numberWithFloat:(-((M_PI)/64))],
                        [NSNumber numberWithFloat:((M_PI)/64)],
                        [NSNumber numberWithFloat:(-((M_PI)/64))],
                        [NSNumber numberWithFloat:((M_PI)/64)],
                        [NSNumber numberWithFloat:(-((M_PI)/64))],
                        [NSNumber numberWithFloat:0],                                
                        nil];

[shakeAnimation setValues:transformValues];

NSArray *times = [NSArray arrayWithObjects:
                  [NSNumber numberWithFloat:0.14f],
                  [NSNumber numberWithFloat:0.28f],
                  [NSNumber numberWithFloat:0.42f],
                  [NSNumber numberWithFloat:0.57f],
                  [NSNumber numberWithFloat:0.71f],
                  [NSNumber numberWithFloat:0.85f],
                  [NSNumber numberWithFloat:1.0f], 
                  nil];

[shakeAnimation setKeyTimes:times];

shakeAnimation.fillMode = kCAFillModeForwards;
shakeAnimation.removedOnCompletion = NO;
shakeAnimation.duration = 0.6f;

[self.viewToShake.layer addAnimation:shakeAnimation forKey:@"anim"];

Also, since you want the shaking to indicate that the user failed to log in, you might also consider adding this animation that tints the screen red while the screen shakes:

//Put this in the header (.h)
@property (nonatomic, strong) UIView *redView;

//Put this in the implementation (.m)
@synthesize redView;

//Put this in viewDidLoad
self.redView = [[UIView alloc] initWithFrame:self.view.frame];
self.redView.layer.opacity = 0.0f;
self.redView.layer.backgroundColor = [[UIColor redColor] CGColor];

//Put this wherever you check if the login failed
CAKeyframeAnimation *redTint = [CAKeyframeAnimation animationWithKeyPath:@"opacity"];
NSArray *transformValues = [NSArray arrayWithObjects:
                           [NSNumber numberWithFloat:0.2f],
                           [NSNumber numberWithFloat:0.0f],                                
                           nil];

[redTint setValues:transformValues];

NSArray *times = [NSArray arrayWithObjects:
                  [NSNumber numberWithFloat:0.5f],
                  [NSNumber numberWithFloat:1.0f], 
                  nil];

[redTint setKeyTimes:times];

redTint.fillMode = kCAFillModeForwards;
redTint.removedOnCompletion = NO;
redTint.duration = 0.6f;

[self.redView.layer addAnimation:shakeAnimation forKey:@"anim"];

Hope this helps!

score 1 · Answer 9 · answered Jan 23 '11 at 21:38

1

very easy shake categorie for UIVoew

https://github.com/jonasschnelli/UIView-I7ShakeAnimation

answered Jan 23 '11 at 21:38

Jonas Schnelli

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3
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score 0 · Answer 10 · answered Sep 25 '13 at 20:58

Using Auto Layout, I adapted Chris Miles' answer but animated NSLayoutConstraints like this:

NSLayoutConstraint *left  = ...
NSLayoutConstraint *right = ...

[UIView animateWithDuration:0.08 delay:0.0 options:UIViewAnimationOptionAutoreverse|UIViewAnimationOptionRepeat animations:^{
    [UIView setAnimationRepeatCount:3];
    left.constant  = 15.0;
    right.constant = 25.0;
    [self.view layoutIfNeeded];
} completion:^(BOOL finished) {
    if (finished) {
        [UIView animateWithDuration:0.08 animations:^{
            left.constant  = 20.0;
            right.constant = 20.0;
            [self.view layoutIfNeeded];
        } completion:NULL];
    }
}];

score 0 · Answer 11 · answered Mar 09 '16 at 20:46

A solution I used for constraints which I set in my storyboard. Without using animateWithDuration.

@IBOutlet var balloonHorizontalConstraint: NSLayoutConstraint!

NSTimer.scheduledTimerWithTimeInterval(0.04, target: self, selector: "animateBalloon", userInfo: nil, repeats: true)

func animateBalloon() {
    switch balloonHorizontalConstraint.constant {
    case -46:
        balloonHorizontalConstraint.constant = -50
    default:
        balloonHorizontalConstraint.constant = -46
    }
}

In my case the animation just kept on going, but I pop my viewcontroller after a duration of a few seconds, this stops my timer aswell.

Shake visual effect on iPhone (NOT shaking the device)

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