I have the method:
- (void)blinkView:(UIView *)view
{
view.layer.opacity = 0.0f;
view.hidden = NO;
[UIView beginAnimations:#"Blinking" context:nil];
[UIView setAnimationRepeatCount:1.0];
[UIView setAnimationDuration:0.6f];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
view.layer.opacity = 1.0f;
[UIView commitAnimations];
}
How can i write this code with blocks, and how i must implement method with reverse effect (hide uiview with blink) ?
[UIView transitionWithView: view
duration:0.6f
options:UIViewAnimationOptionCurveEaseInOut
animations:^{ view.layer.opacity = 1.0f; }
completion:NULL];
or
[UIView transitionWithView: view
duration:0.6f
options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse
animations:^{ view.layer.opacity = 1.0f; }
completion:NULL];
You can set the repeat count by recursively calling the animation block (see here).
Hope it will help you.
You can use UIView's setAnimationDelegate: and setAnimationDidStopSelector:
[UIView beginAnimations:#"Blinking" context:nil];
[UIView setAnimationRepeatCount:1.0];
[UIView setAnimationDuration:0.6f];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(animationDidStop:finished:context:)];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
view.layer.opacity = 1.0f;
[UIView commitAnimations];
- (void) animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
// add your final code here : you can give new animation effect here.
}
Or try animateWithDuration (available only in iOS 4 or later)
[UIView animateWithDuration:0.6f
animations:^{
view.layer.opacity = 1.0f;
}
completion:^(BOOL completed){
// add your final code here : you can give new animation effect here.
}
];
Related
I'm animating two uiviews using CGAffineTransform
For 1st view:
swingView.transform = CGAffineTransformRotate(swingView.transform, M_PI/2);
[UIView animateWithDuration:1.0
delay:0.0
options:UIViewAnimationOptionRepeat|UIViewAnimationOptionAutoreverse
animations:^{
swingView.transform = CGAffineTransformMakeRotation(M_PI);
}
completion:^(BOOL finished){
NSLog(#"Done!");
}];
For second view
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:2.0];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationBeginsFromCurrentState:YES];
CGAffineTransform transform = CGAffineTransformMakeTranslation(touchLocation.x, touchLocation.y);
CGAffineTransform transform1 = CGAffineTransformMakeTranslation(-120, 0);
myview.transform = transform1;
[UIView commitAnimations];
Here two views are hitting when animation starts, what i have to do to not allow hitting between these uiviews.
I am having a problem fading out my subview. I have no trouble fading the view in but fading out ..just drops the view.
-(void)flipToReview {
ReviewViewController *reviewVariable = [[ReviewViewController alloc] initWithNibName:#"ReviewViewController" bundle:nil];
[self setReviewViewController:reviewVariable];
self.ReviewViewController.view.alpha =0;
[UIView beginAnimations:#"flipview" context:nil];
[UIView setAnimationDuration:0.3];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationTransition:UIViewAnimationTransitionNone forView:_window cache:YES];
[reviewVariable release];
[self.window addSubview:self.ReviewViewController.view];
self.ReviewViewController.view.alpha =1;
[UIView commitAnimations];
}
-(void)flipBackFromReview {
// self.ReviewViewController.view.alpha = 1;
[UIView beginAnimations:#"trip" context:nil];
[UIView setAnimationDuration:0.3];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationTransition:UIViewAnimationTransitionNone forView:_window cache:NO];
self.ReviewViewController.view.alpha = 0;
[self.ReviewViewController.view removeFromSuperview];
[UIView commitAnimations];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
[self.ReviewViewController.view setHidden:1];
NSLog(#"remove subview");
}
Try the following:
[UIView animateWithDuration:3.0 delay:0.0
options:UIViewAnimationOptionAllowUserInteraction
animations:^{ ReviewViewController.view.alpha = 0.0;}
completion:^(BOOL fin) {
if (fin) [ReviewViewController.view removeFromSuperview];
}];
You need to move:
[self.ReviewViewController.view removeFromSuperview];
That cannot be done "over time" in an animation. What you want to do is move that to a selector and use setAnimationDelegate and setAnimationDidStopSelector. Put the following in your animation block:
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(finshedFadeOut)];
Then make the following method:
- (void)finshedFadeOut {
[self.ReviewViewController.view removeFromSuperview];
}
I had this issue as well, the way I got around it was changing the alpha to 0, instead of just removing the view. That can be animated.
I am using animation on a button click first time show a view and second ti me hide a view.
here is my code for hiding a view
-(IBAction)clickme
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationDelegate:self];
[view1 setAlpha:0.0];
[UIView commitAnimations];
}
similar code is there for showing the view.
But the problem arises when user click the button many times again and again....means i am using 2 seconds for my animation but if user presses the same button in during the animation then the output result is very bad.
I don't want to disable that button during the period of animation.
Is there any other way?
You need to keep track of whether there's an animation going on, and ignore the click if it is.
Declare an instance variable BOOL animating; in your class header, and initialise it to NO in your init.
Then,
-(IBAction)clickme
{
if (animating) return;
animating = YES;
[UIView beginAnimations:nil context:self];
[UIView setAnimationDuration:0.3];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationDelegate:self];
[view1 setAlpha:0.0];
[UIView commitAnimations];
}
- (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
if (context == self)
animating = NO;
}
try to use + (void)setAnimationBeginsFromCurrentState:(BOOL)fromCurrentState:
-(IBAction)clickme
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationDelegate:self];
[view1 setAlpha:0.0];
[UIView commitAnimations];
}
I would like to have an UIImageView that flickers. I thougt I can make it with CoreAnimation and the alpha-value. I tried this:
for (int a = 1; a <= 100; a++) {
schwarz.alpha = 0.7;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDuration:1];
schwarz.alpha = 0,1;
[UIView commitAnimations];
}
but it doenst work. He just moves to 0.1 and not again to 0.7.
I also tried this:
schwarz.alpha = 0.7;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDuration:1];
schwarz.alpha = 0.1;
[UIView commitAnimations];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDuration:1];
schwarz.alpha = 1;
[UIView commitAnimations];
[UIView commitAnimations];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDuration:1];
schwarz.alpha = 3;
[UIView commitAnimations];
// and so on...
And again It doenst work. How can I implement the flickering?
Thanks!
The problem with your code is that the [UIView commitAnimation] method doesn't block - I mean that the code implementation continues and the animation is done asynchronously.
So, actually, what is going on is that you go through all the loop iterations first and then the animation is done from 0.7 to 1.0...
Just use the setAnimationDidStopSelector without the "for" loop.
schwarz.alpha = 0.7;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDuration:1];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(animationDidStop:finished:context:)];
schwarz.alpha = 0.1;
[UIView commitAnimations];
The catching method might be:
- (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
/* Do your things here... */ }
All UIView animations added in one event loop are basically merged together. You need to use the UIView animationDidStopSelector. As an example, see the following:
-(void)tileAnimate:(NSString*)animationID finished:(BOOL)finished context:(void*)context {
int position = [animationID intValue];
NSString *next = [NSString stringWithFormat:#"%d", position+1];
if(position == boardSize) {
return;
}
[UIView beginAnimations:next context:context];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:timing];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(tileAnimate:finished:context:)];
buttons[position].transform = CGAffineTransformIdentity;
[UIView commitAnimations];
}
I use this to, one after another, animate shrinking an array of buttons back to their normal sizes.
Two more things:
First, UIViewAnimationCurveEaseIn does not work fading i think.
Second, in your original code you say:
schwarz.alpha = 0,1;
Note that there is a comma there and not a dot. Interestingly that code compiles, but it probably does not do what you intended.
Here is another take on this. I'm not using fading but I think the flickering effect is still nice.
http://github.com/st3fan/iphone-experiments/tree/master/Miscellaneous/Flicker/
Use the first code sample posted, but take out the for statement and add the lines
[UIView setAnimationRepeatAutoreverses:YES];
[UIView setAnimationRepeatCount:(float)number];
I think -1 for the number should be repeating indefinitely, but I'm not 100% sure on that.
I'm trying to do a multistage animation, so that a UIImageView (1) fades in, (2) moves, (3) slide off the screen.
Only stage 1 seems to work. What am I doing wrong? Here's the code:
// FIRST PART - FADE IN
-(void)firstAnim
{
// 'sprite' is a UIImageView
[sprite setAlpha:0.1f];
[UIView beginAnimations:#"anim1" context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:0.25];
[UIView setAnimationDidStopSelector:#selector(secondAnim)];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[sprite setAlpha:1.0f];
[UIView commitAnimations];
}
// SECOND PART - MOVE
-(void)secondAnim
{
[UIView beginAnimations:#"anim2" context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:0.5];
[UIView setAnimationDidStopSelector:#selector(thirdAnim)];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
sprite.frame = CGRectMake(170, 184, 20, 20);
[UIView commitAnimations];
}
// THIRD PART - SLIDE OFF SCREEN
-(void)thirdAnim
{
[UIView beginAnimations:#"anim3" context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:0.5];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
sprite.frame = CGRectMake(170, 420, 20, 20);
[UIView commitAnimations];
}
You need to add a call to set yourself as the animation delegate:
[UIView setAnimationDelegate:self];
It would be a good idea to unset yourself as the delegate (set to nil) in the last animation block.
The complete solution to your question is:
1) set the animation delegate
2) use the correct selector and method signature
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:.5];
[UIView setAnimationDelegate:self]; //set delegate!
[UIView setAnimationDidStopSelector:
#selector(secondAnim:finished:context:)];
-(void)secondAnim:(NSString *)animationID
finished:(NSNumber *)finished
context:(void *)context {
//animation #2
}