Animation in content of ScrollView - ios

Question

I want to animate content of scrollview i have tried this for animation.
- (void)viewDidLoad {
[super viewDidLoad];
//Scroll View Created Programmatically
scrollview=[[UIScrollView alloc] initWithFrame:self.view.bounds];
scrollview.delegate=self;
scrollview.contentSize=CGSizeMake(scrollview.bounds.size.width, self.view.bounds.size.height);
[self.view addSubview:scrollview];
// Road Image Created Programmatically
backgroundImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
backgroundImageView.image = [UIImage imageNamed:#"roadds.png"];
backgroundImageView.contentMode = UIViewContentModeRedraw;
[scrollview addSubview:backgroundImageView];
// Tree top left Created Programmatically
Tree = [[UIImageView alloc] initWithFrame: CGRectMake(0, 0, 30, 50)];
Tree.image = [UIImage imageNamed:#"rsz_1rsz_tree.png"];
Tree.contentMode = UIViewContentModeTopLeft;
[scrollview addSubview:Tree];
//Tree top Right
Tree1 = [[UIImageView alloc] initWithFrame: CGRectMake(self.view.frame.size.width-30, 0, 30, 50)];
Tree1.image = [UIImage imageNamed:#"rsz_tree1.png"];
Tree1.contentMode = UIViewContentModeTopRight;
[scrollview addSubview:Tree1];
//Tree Bottom left
Tree2 = [[UIImageView alloc] initWithFrame: CGRectMake(0, self.view.frame.size.height-80, 30, 50)];
Tree2.image = [UIImage imageNamed:#"rsz_tree2.png"];
Tree2.contentMode = UIViewContentModeBottomLeft;
[scrollview addSubview:Tree2];
//Tree Bottom Right
Tree3 = [[UIImageView alloc] initWithFrame: CGRectMake(self.view.frame.size.width-30, self.view.frame.size.height-80, 30, 50)];
Tree3.image = [UIImage imageNamed:#"rsz_tree3.png"];
Tree3.contentMode = UIViewContentModeBottomRight;
[scrollview addSubview:Tree3];
// Car
car = [[UIImageView alloc] initWithFrame: CGRectMake((self.view.frame.size.width)/2+20, self.view.frame.size.height-120, 40, 60)];
car.image = [UIImage imageNamed:#"rsz_car1.png"];
car.contentMode = UIViewContentModeCenter;
[scrollview addSubview:car];
//Grass
grass = [[UIImageView alloc] initWithFrame:CGRectMake(0, (self.view.frame.size.height)/2,30, 30)];
grass.image = [UIImage imageNamed:#"rsz_grass.png"];
grass.contentMode = UIViewContentModeBottomLeft;
[scrollview addSubview:grass];
//Grass
grass1 = [[UIImageView alloc] initWithFrame:CGRectMake(self.view.frame.size.width-60, (self.view.frame.size.height)/2,30, 30)];
grass1.image = [UIImage imageNamed:#"rsz_grass1.png"];
grass1.contentMode = UIViewContentModeBottomLeft;
[scrollview addSubview:grass1];
// Left Arrow
left = [[UIButton alloc] initWithFrame:CGRectMake((self.view.frame.size.width)/2+60, (self.view.frame.size.height-35),30, 30)];
[left setBackgroundImage:[UIImage imageNamed:#"rsz_arrowl.png"]forState:UIControlStateNormal];
left.contentMode = UIViewContentModeBottomRight;
[scrollview addSubview:left];
//right arrow
right = [[UIButton alloc] initWithFrame:CGRectMake((self.view.bounds.size.width)/2 - 90, (self.view.frame.size.height-35),30, 30)];
[right setBackgroundImage:[UIImage imageNamed:#"rsz_arrowr.png"]forState:UIControlStateNormal];
right.contentMode = UIViewContentModeBottomLeft;
[scrollview addSubview:right];
// For Animation
CGRect bounds = scrollview.bounds;
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"bounds"];
animation.duration = 10;
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.fromValue = [NSValue valueWithCGRect:bounds];
bounds.origin.y += 100;
animation.toValue =[NSValue valueWithCGRect:bounds];
[scrollview.layer addAnimation:animation forKey:#"bounds"];
scrollview.bounds = bounds;
}

Answer 1

Add UIView to ScrollView and then add your all stuff to this view.
And add animation to this view or view's layer. Hope this will work. :)
If you want your initial position back after animation add this line
bounds.origin.y -= 100;
after
[scrollview.layer addAnimation:animation forKey:#"bounds"];
so, last five line of your viewdidLoad should as below,
bounds.origin.y += 100;
animation.toValue =[NSValue valueWithCGRect:bounds];
[scrollview.layer addAnimation:animation forKey:#"bounds"];
bounds.origin.y -= 100;
scrollview.bounds = bounds;