// Animate moving the cards into position
[UIView animateWithDuration:0.5
delay:0.0
options:UIViewAnimationOptionCurveLinear
animations: ^{ card.frame = cardFrame; }
completion: ^ (BOOL finished) {
if (finished) {
[UIView animateWithDuration:1.0
delay:3.0
options:UIViewAnimationOptionTransitionFlipFromRight
animations: ^ { card.image = [UIImage imageNamed:#"imgBack.png"]; }
completion:NULL];
}
}];
for some reason the second delay just won't delay. and the animation continues instantly any help?
The problem you are having actually has nothing to do with nesting. UIImageView simply cannot animate the setImage: property, and hence the code is executed as soon as it is reached.
If you are OK with simply delaying setting the image property, then go ahead and use:
double delayInSeconds = 2.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
card.image = newImage;
});
If you are looking to animate the image changing, you might wanna look into CATransition, and apply a transition effect to images changing within the image view.
Related
I'm trying to do some animation to my UIProgressView when i finished upload a photo to my server. When i set the duration to 5.0 or 10.0 seconds, it it not different and the completition is called immediately.
[UIView animateWithDuration:5.0 animations:^{
self.progressBar.progress = 1.0;
} completion:^(BOOL finished) {
NSLog(#"kykny udah");
if (finished) {
NSLog(#"finished");
Post *post = [mappingResult.dictionary objectForKey:#""];
[self.posts insertObject:post atIndex:0];
NSLog(#"caption: %# , items: %#",post.caption, post.items);
CGRect frame = self.progressView.frame;
frame.size.height = 0;
self.progressView.frame = frame;
[self.tableView reloadData];
}
}];
how come this issue happens ? It is just like a normal sequence code in reality
Try adding the following line after updating your frame changes like
self.progressBar.progress = 1.0;
[self.view layoutIfNeeded];
This will make your animation effect for the time you specified in animation duration.
If you want to show just the progress for 10sec then
// PROGRESS VIEW IS JUST A VIEW WITH SOME BACKGROUND COLOR WITH FRAME CGRectMake(0,0,0,10)
[UIView animateWithDuration:5.0 animations:^{
self.progressView.frame = CGRectMake(0,0,100,10); // adjust the frame to get the linear animation view
} completion:^(BOOL finished) {
NSLog(#"kykny udah");
if (finished) {
.....
self.progressView.frame = CGRectMake(0,0,100,0);
.....
}
}];
I have an wheel image in .png format, I want to know how can i animate so that it rotates continuously, I searched on stackoverflow and found certain snippets of code which helped me rotate my image but it wouldn't rotate continuously, it would just rotate for a few seconds and stop, the code as follows
the code in viewdidload
UIImageView *imageToMove =
[[UIImageView alloc] initWithImage:[UIImageimageNamed:#"horo_circle.png"]];
[self.view addSubview:imageToMove];
[self rotateImage:imageToMove duration:5.0
curve:UIViewAnimationCurveEaseIn degrees:180];
and the animation
- (void)rotateImage:(UIImageView *)image duration:(NSTimeInterval)duration
curve:(int)curve degrees:(CGFloat)degrees
{
// Setup the animation
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:duration];
[UIView setAnimationCurve:curve];
[UIView setAnimationBeginsFromCurrentState:YES];
// The transform matrix
CGAffineTransform transform =
CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(degrees));
image.transform = transform;
// Commit the changes
[UIView commitAnimations];
}
and the following lines after the import
#define M_PI 3.14159265358979323846264338327950288 /* pi */
#define DEGREES_TO_RADIANS(angle) (angle / 180.0 * M_PI)
You are better of doing this with a CABasicAnimation:
if ([self.spinnerOverlay animationForKey:#"SpinAnimation"] == nil) {
CABasicAnimation* animation = [CABasicAnimation animationWithKeyPath:#"transform.rotation.z"];
animation.fromValue = [NSNumber numberWithFloat:0.0f];
animation.toValue = [NSNumber numberWithFloat: 2*M_PI];
animation.duration = 10.0f;
animation.repeatCount = INFINITY;
[self.spinnerOverlay.layer addAnimation:animation forKey:#"SpinAnimation"];
}
In this code I check whether the animation is all ready set, not need to set it again.
The spinnerOverlay is in your case the UIImageView you want to rotate.
To stop the animation:
[self.spinnerOverlay.layer removeAnimationForKey:#"SpinAnimation"];
The code bellow will spin a UIImageView called iconView continiously until rotate == NO.
The image will always return to its original position.
- (void)performRotationAnimated
{
[UIView animateWithDuration:0.5
delay:0
options:UIViewAnimationOptionCurveLinear
animations:^{
self.iconView.transform = CGAffineTransformMakeRotation(M_PI);
}
completion:^(BOOL finished){
[UIView animateWithDuration:0.5
delay:0
options:UIViewAnimationOptionCurveLinear
animations:^{
self.iconView.transform = CGAffineTransformMakeRotation(0);
}
completion:^(BOOL finished){
if (_rotate) {
[self performRotationAnimated];
}
}];
}];
}
This is a variation on the same theme.
(Total duration: 2 * 0.5 = 1 sec for a spin)
Works like magic!
Here is another way to do it with a timer.
In your viewController.h file, you'll need to declare your timer and image:
#interface ViewController : UIViewController
{
IBOutlet UIImageView *spinningImage;
NSTimer *spinTimer;
}
Next, in your ViewController.m, you add this code and can make the spin go faster by lowering the time interval or by increasing the transform interval.
-(void) viewDidLoad {
spinTimer = [NSTimer scheduledTimerWithTimeInterval:.01 target: self selector:#selector(spinVoid) userInfo:nil repeats:YES];
}
-(void) spinVoid {
spinningImage.transform = CGAffineTransformRotate(spinningImage.transform, 0.001);
}
Hope this helps!
Now that we're at iOS6, please consider switching to block based animations (that are available since iOS 4.0) rather than the classical method. Try this:
[UIView animateWithDuration:duration delay:0.0 options:UIViewAnimationOptionRepeat animations:^{
image.transform = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS(degrees));
} completion:nil];
Using the method you've chosen for animations :
[UIView setAnimationRepeatCount:10000000];
or, you can specify the UIViewAnimationOptionRepeat flag in the blocks method animateWithDuration:delay:options:animations:completion:
I'm trying to add a short delay to my app. It's just the splash screen fade out so it won't affect any other functionality in the app (since nothing else is running). I've tried a variety of approaches with no success. (This is happening in viewDidLoad of a viewController):
C's sleep:
...
//add the splash screen
[self.view addSubview:splashScreen];
sleep(3);
[self fadeOut:splashScreen];
NSObject's performSelector (thought this would work because doesn't UIViewController inherit from NSObject?)
[self performSelector:#selector(fadeOut:) afterDelay:3];
NSTimeInterval:
//wait 3 seconds
NSTimeInterval theTimeInterval = 3;
[self fadeOut:splashScreen withADelayOf:&theTimeInterval];
Here is fadeOut (written to work with the NSTimeInterval example)
- (void) fadeOut:(UIView *)viewToToggle withADelayOf:(NSTimeInterval* ) animDelay {
[UIView setAnimationDelay:*animDelay];
[UIView animateWithDuration:0.25 animations:^{
viewToToggle.alpha = 0.0;
}];
}
I get the fadeOut but not the delay. Can someone nudge me in the right direction. Thanks.
you can try dispatch_after or animateWithDuration:delay:options:animations:completion:
double delayInSeconds = 0.5;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
//yourcode
});
or
[UIView animateWithDuration:0.175 delay:0 options:UIViewAnimationOptionCurveEaseIn animations:^{
//your code
}completion:^(BOOL completed){
//animation completion execution
}];
You should rely on this method if you want to animate some properties of your view with some delay:
+(void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion
Have a look to the ref doc here.
So your code could be something like this:
[UIView animateWithDuration:0.25 delay:3.0 options: UIViewAnimationOptionCurveLinear animations:^{
viewToToggle.alpha = 0.0;
} completion: nil];
Tiguero and J2TheC both pointed me in the exact direction I needed to go:
Here's the code I used in case someone else needs the assist:
//add the splash screen
[self.view addSubview:splashScreen];
//fade it out with a delay
[UIView animateWithDuration:0.75 delay:3.0 options:UIViewAnimationOptionCurveEaseIn
animations:^{
splashScreen.alpha = 0.0;
}
completion:^ (BOOL finished) {
//do something on end
}];
Do One thing:
Make an uiimageview ref in the Appdelegate and in the didfinishLunching do this:
// Dont assign the main viewcontroller to the windwo here.
{
img = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"splash.png"]];
img.frame = CGRectMake(0, 0, 320, 480);
[self.window addSubview:img];
[NSTimer scheduledTimerWithTimeInterval:3 target:self selector:#selector(removeSplash) userInfo:nil repeats:NO];
[self.window makeKeyAndVisible];
}
- (void)removeSplash{
[img removerFromSuperview];
self.window.rootViewController = self.viewController;
}
I want to create an animated menu.
first it's hidden outside screen
when user taps the screen, it will slide in
user can tap it and it do something
then after 3s it will slide outside screen
But problem is it not response when I tap it. Why?
example code: All code is in my UIView class.
showing = NO;
box = [[UIView alloc] initWithFrame:CGRectMake(500,-200,200,200)];
box.backgroundColor = [UIColor redColor];
UITapGestureRecognizer *tapBox = [[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapMenuHandler:)] autorelease];
[box addGestureRecognizer:tapBox];
[self addSubView:box];
and:
-(void) tapMenuHandler: (UIView *)obj {
//Do something
NSLog(#"tap box");
}
and:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
if (!showing) {
box.frame = CGRectMake(500, -200, 200, 200);
[UIView animateWithDuration:0.5f delay:0.3f options:(UIViewAnimationOptionAllowUserInteraction) animations:^{
box.frame = CGRectMake(500, 200, 200, 200);
} completion:^(BOOL finished) {
showing = YES;
[UIView animateWithDuration:0.5f delay:3.0f options:(UIViewAnimationOptionAllowUserInteraction) animations:^{
box.frame = CGRectMake(500, -200, 200,200);
} completion:^(BOOL finished) {
showing = NO;
}];
}];
}
}
Thank for your help and sorry for my English :)
Edit: more detail
I tried set start my box's origin in screen (ex. 500,600), It still always response when tap at start point (500,600) even though my box move to another position.
Update:
I changed my way to move box outside screen by use NSTimer then it's work!
[UIView animateWithDuration:0.5f delay:0.3f options:UIViewAnimationOptionAllowUserInteraction animations:^{
box.frame = CGRectMake(500,200,200,200);
} completion:^(BOOL finished) {
isShowMenubar = YES;
//use NSTimer instead of delay
[NSTimer scheduledTimerWithTimeInterval:3.0f target:self selector:#selector(hideBox) userInfo:nil repeats:NO];
}];
and
-(void)hideBox {
[UIView animateWithDuration:0.5f delay:0.0f options:UIViewAnimationOptionAllowUserInteraction animations:^{
box.frame = CGRectMake(500,-200,200,200);} completion:^(BOOL finished) {
isShowMenubar = NO;
}];
}
The reason why the box is not receiving touches has to do with how animation works. Your box is actually offscreen, but visually, it's going through the animation.
Even though you set the delay as 3.0, it still moves the box beforehand (due to the animation method still being called). So in your current code, if you tapped on the box at (500, -200) then it will receive the touch.
To fix this, either use an NSTimer or Grand Central Dispatch to delay.
NSTimer:
[NSTimer scheduledTimerWithTimeInterval:3.0 target:self action:#selector(dismissBox) userInfo:nil repeats:NO];
The problem with NSTimer is that you'll have to put that animation code in a separate method.
Grand Central Dispatch:
double delayInSeconds = 3.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
[UIView animateWithDuration:0.5f animations:^{
box.frame = CGRectMake(box.frame.origin.x, -200, 200,200);
}completion:^(BOOL finished) {
showing = NO;
}];
});
I ran the code and didn't see the red view either. Then playing around for a bit, I got that your view is animating but is still out of bounds so you never see it. try changing the animation block to something like (the origin of the frame is at the left bottom corner)
box.frame = CGRectMake(100, 100, 200, 200);
and hopefully it will come animating.
Also, assuming that you run these in your view controller, the correct method should be
[self.view addSubview:box];
hope this helps
- (void) startLoading {
[self blink];
}
- (void) blink {
[UIView animateWithDuration:0.5
delay: 0.0
options: UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionCurveEaseOut
animations:^{
//animate stuff
}
completion:^(BOOL finished){
[self blink];
}];
}
- (void) stopLoading {
//What goes here?
}
In my UIView's initWithFrame, I build some loader graphics then start the loader animation from [self startLoading].
The question is now, how do I stop this 'infinite loop'? or what goes in the stopLoading or dealloc method to nicely tear everything down?
When I ignore the fact that a completion block is there and just release my UIView from the super view, everything goes fine for some seconds (more than the 0.5 sec specified) then the app crashes with a message:
malloc: * mmap(size=2097152) failed (error code=12)
error: can't allocate region
** set a breakpoint in malloc_error_break to debug
I have a breakpoint in malloc_error_break and the culprit is the animation block.
I assume that the UIView was released by being removed from the super view and later on the completion block is executed, having a reference to self this is messaging a released object.
I can't find anything in the docs about canceling a 'queued' block.
To cancel, do what you would do with any looping operation you want to be able to cancel: set a flag which you check each time before looping. So:
- (void) stopLoading {
kCancel = YES;
}
And now your completion block looks like this:
completion:^(BOOL finished){
if (!kCancel)
[self blink];
}];
kCancel could be an ivar, a static global variable, whatever.
UIViewAnimationOptionRepeat has magic for u
[UIView animateWithDuration:0.5
delay: 0.0
options: UIViewAnimationOptionAllowUserInteraction | UIViewAnimationOptionCurveEaseOut | UIViewAnimationOptionRepeat
animations:^{
//animate stuff
}
completion:^(BOOL finished){
NSLog(#"solved ");
}];
I just repeat the animation and kill it after some time with a dispatch block:
- (void)animate // Blink a view three times
{
// We need to stop the animation after a while (0.9 sec)
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, 0.9 * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void)
{
[view.layer removeAllAnimations];
view.alpha = 0.0; // Animation clean-up
});
[UIView animateWithDuration:0.15 // 0.15*6=0.9: It will animate six times (three in reverse)
delay:0.0
options:UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat
animations:^{
view.alpha = 1.0; // Animation
}
completion:NULL];
}