Animate Mask in Objective C - objective-c

Question

I am making an application where I have to show 3 images in a single screen, and when User touch one image then that Image should be shown by Animating and resizing.
So for 1st Step I did Masking of 3 images with 3 different Transparent Mask Image from
How to Mask an UIImageView
And my method is like below
- (UIImageView*) maskedImage:(UIImage *)image withMasked:(UIImage *)maskImage {
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
CALayer *mask1 = [CALayer layer];
mask1.contents = (id)[maskImage CGImage];
mask1.frame = CGRectMake(0, 0, 1024, 768);
imageView.layer.mask = mask1;
imageView.layer.masksToBounds = YES;
return imageView;
}
And I am calling this as
self.image2 = [UIImage imageNamed:#"screen2Full.png"];
self.mask2 = [UIImage imageNamed:#"maskImage.png"];
self.imageView2 = [self maskedImage:self.image2 withMasked:self.mask2];
[self.completeSingleView addSubview:self.imageView2];
This is working perfectly.
Now for Step 2. Animate the Mask, so that Full Image can be shown. I have googled a lot about this but didn't get success. So Please help me. I just want to know how can we Animate and Resize the Mask Image So that I can view a full Image. My concept is as below.

Answer 1

So finally i got the solution from multiple sites and some own logic and hard work obviously ;). So here is the solution of this
-(void)moveLayer:(CALayer*)layer to:(CGPoint)point
{
// Prepare the animation from the current position to the new position
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"position"];
animation.fromValue = [layer valueForKey:#"position"];
animation.toValue = [NSValue valueWithCGPoint:point];
animation.duration = .3;
layer.position = point;
[layer addAnimation:animation forKey:#"position"];
}
-(void)resizeLayer:(CALayer*)layer to:(CGSize)size
{
CGRect oldBounds = layer.bounds;
CGRect newBounds = oldBounds;
newBounds.size = size;
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"bounds"];
animation.fromValue = [NSValue valueWithCGRect:oldBounds];
animation.toValue = [NSValue valueWithCGRect:newBounds];
animation.duration = .3;
layer.bounds = newBounds;
[layer addAnimation:animation forKey:#"bounds"];
}
- (UIImageView*) animateMaskImage:(UIImage *)image withMask:(UIImage *)maskImage width:(int )wd andHeight:(int )ht andSize:(CGSize)size andPosition:(CGPoint)pt {
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
CALayer *mask = [CALayer layer];
mask.contents = (id)[maskImage CGImage];
mask.frame = CGRectMake(0, 0, wd, ht);
//This needs to be place before masking. I don't knwo why. But its working :)
[self resizeLayer:mask to:size];
[self moveLayer:mask to:pt];
imageView.layer.mask = mask;
imageView.layer.masksToBounds = YES;
return imageView;
}
You just need to call this as
[self.imageView1 removeFromSuperview];
self.imageView1 = [self animateMaskedImage:self.image1 withMasked:self.mask1 width:1024 andHeight:768 andSize:CGSizeMake(1024*4, 768*4) andPosition:CGPointMake(1024*2, 768*2)];
[self.completeSingleView addSubview:self.imageView1];