shake animation

shake animation

- (void)shakenAView:(UIView *)view {

    CGPoint leftPoint = CGPointMake(view.center.x - 3, view.center.y);
    CGPoint rightPoint = CGPointMake(view.center.x + 3, view.center.y);
    
    CGMutablePathRef path = CGPathCreateMutable();
    CGPathMoveToPoint(path, NULL, view.center.x, view.center.y);
    CGPathAddLineToPoint(path, NULL, leftPoint.x, leftPoint.y);
    CGPathAddLineToPoint(path, NULL, rightPoint.x, rightPoint.y);
    CGPathAddLineToPoint(path, NULL, leftPoint.x, rightPoint.y);
    CGPathAddLineToPoint(path, NULL, view.center.x, view.center.y);
    
    CAKeyframeAnimation *shakeAni = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    shakeAni.path = path;
    shakeAni.duration = 0.3;
    
    
    [view.layer addAnimation:shakeAni forKey:nil];
}