Animate addtosubview for multiple subviews - iphone

Question

I am having an array of UIViews and I want to arrange them in a main view in a grid form, and I also wanted it to animate ( ie the grids should appear one by one slowly). Tried animating with in a for loop but didnt work but came up with a work around to achieve something closer to what I want, but just wanted to know if there is a better way to do this. I know there is some property with CAAnimationGroup (begintime) but sure how to connect it to addtosubview. Here is my code, let me know if there is a better way to do it.
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
CGFloat x = 0;
CGFloat delay = .3;
for(int i=0;i<30;i++)
{
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(x, 0, 50, 50)];
myView.backgroundColor = [UIColor greenColor];
myView.alpha = 0.0;
x = x + 50+ 2;
[UIView animateWithDuration:0.25 delay:delay options:UIViewAnimationOptionCurveEaseInOut animations:^{
[self.view addSubview:myView];
myView.transform = CGAffineTransformMakeScale(0.5, 0.5);
// myView.transform = CGAffineTransformMakeRotation(90);
} completion:^(BOOL finished) {
[UIView animateWithDuration:.5 animations:^{
myView.transform = CGAffineTransformMakeScale(1.0, 1.0);
myView.alpha = 1.0;
}];
}];
delay = delay + .3;
}
// Do any additional setup after loading the view, typically from a nib.
}
-anoop

Answer 1

Hi,I have also used animation within for loop but it didn't work
properly then I call a method that animate the view , multiple times
and it worked properly.I think this is better way to simply apply
animation. by calling a method.I m putting some code here may it will
help u.
- (void)viewDidLoad
{
radius=82.097;
rotationMultiplier=1;
toAngle = fromAngle = 0;
toStart = NO;
center=CGPointMake(161, 233);
NSString *path = [[NSBundle mainBundle] pathForResource:#"click" ofType:#"mp3"];
self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:nil];
[self.player prepareToPlay];
SingleTouchGesture *wheelRecogniser=[[SingleTouchGesture alloc] initWithTarget:self action:#selector(rotateWheel:)];
[self.view addGestureRecognizer:wheelRecogniser];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
-(void) rotate:(int) time
{
CABasicAnimation *topAnimation = [CABasicAnimation animationWithKeyPath:#"transform.rotation.z"];
topAnimation.duration=time;
topAnimation.fromValue= [NSNumber numberWithFloat:fromAngle];
topAnimation.toValue=[NSNumber numberWithFloat:toAngle];
topAnimation.delegate = self;
topAnimation.fillMode = kCAFillModeForwards;
topAnimation.removedOnCompletion = NO;
[wheelImage.layer addAnimation:topAnimation forKey:#"transform"];
fromAngle = toAngle;
}
-(void) rotateWheel:(SingleTouchGesture*) recogniser
{
toAngle += recogniser.rotation;
if (toStart)
{
if (recogniser.state == UIGestureRecognizerStateEnded)
{
NSLog(#"Speed === %f",recogniser.speed);
rotationMultiplier=[self getMultiplier:recogniser.speed];
NSLog(#"Rotation Multiplier..%f",rotationMultiplier);
toStart = NO;
NSLog(#"State Ended");
self.player.currentTime=0;
[self.player play];
if (recogniser.rotation>=0)
{
toAngle =fromAngle+(rotationMultiplier*3.14);
}
else
{
toAngle =fromAngle-(rotationMultiplier*3.14);
}
}
[self rotate:1];
}
else
{
if (recogniser.state==UIGestureRecognizerStateChanged) {
NSLog(#"continue...");
CGPoint pt=[recogniser locationInView:self.view];
float dis=[recogniser distanceBetweenPoints:center with:pt];
if (dis<radius)
{
if (recogniser.rotation>=0)
{
NSLog(#"Rotation value: +ve: %f",recogniser.rotation);
toStart = YES;
toAngle =fromAngle+(rotationMultiplier*3.14);
recogniser.rotation = 0;
}
else
{
NSLog(#"Rotation value: -ve: %f",recogniser.rotation);
toStart = YES;
toAngle=fromAngle-(rotationMultiplier*3.14);
recogniser.rotation = 0;
}
}
}
}
}
Here rotate method is calling multiple times.