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  • Adding bounce effect to UIImageView .

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    We can add animation to view using CABasicAnimation. Here we are adding bounce effect to UIImageView.

    The following code will show the bounce effect in the UIImageView at y-axis:-

    CGPoint origin = self.imgView.center;    // self.imgView is the outlet on UIImageView
        
    CGPoint target = CGPointMake(self.imgView.center.x, self.imgView.center.y+100);
        
    CABasicAnimation *bounce = [CABasicAnimation animationWithKeyPath:@"position.y"];
        
    bounce.duration = 0.5;
    
    bounce.fromValue = [NSNumber numberWithInt:origin.y];
      
    bounce.toValue = [NSNumber numberWithInt:target.y];
    
    bounce.repeatCount = 3;
    
    bounce.autoreverses = YES;
    
    [self.imgView.layer addAnimation:bounce forKey:@"position"];
    

    In the above code we are setting the bounce position along the y-axis. We also set the duration for the bounce and the count for the image to bounce i.e how many times the UIImage will bounce .

    We can also set the bounce effect of UIImageView along x-axis as :-

    CGPoint origin = self.imgView.center;
      
    CGPoint target = CGPointMake(self.imgView.center.x-100, self.imgView.center.y);
    
    CABasicAnimation *bounce = [CABasicAnimation animationWithKeyPath:@"position.x"];
    
    bounce.duration = 0.5;    
    
    bounce.fromValue = [NSNumber numberWithInt:origin.x];
    
    bounce.toValue = [NSNumber numberWithInt:target.x];
    
    bounce.repeatCount = 3;
    
    bounce.autoreverses = YES;
    
    [self.imgView.layer addAnimation:bounce forKey:@"position"];

    Note :- We also have to include QuartzCore framework in our project !!

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