I am trying to force one animation waiting for the other, but without luck.
UIBezierPath *path = [UIBezierPath bezierPath];
This is what I want to do:
[path addLineToPoint: point1];
and when this is done call this:
imageview1.transform = CGAffineTransformMakeScale(1.5f, 1.5f);
While I'm still unclear as to your needs, here is how you can call one animation AFTER the first one finishes:
[UIView animateWithDuration:1.0f
delay:0.0f
options:UIViewAnimationOptionCurveLinear
animations:^(void){
// Add in your first chunk of animated code.
}
completion:^(BOOL finished) {
[UIView animateWithDuration:1.0f
delay:0.0f
options:UIViewAnimationOptionCurveLinear
animations:^(void){
// Add in your second chunk of animated code.
}
completion:^(BOOL finished) {
}];
}];
Hope that Helps!
Related
In my Xcode project I have put a label on an xib.
I want to fade the label in and out continuously until the user taps the screen. When this happens I want a new view to appear.
Can anyone suggest how to do the fade-in/out?
Instead of nesting blocks and manually restarting your animations, you can use the option pair UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat to tell Core Animation you want the label to fade in and out continuously.
- (void)startAnimatingLabel
{
self.label.alpha = 0;
[UIView animateWithDuration:1
delay:0
options: UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat
animations:^{
self.label.alpha = 1;
} completion:nil];
}
To stop the animations from running, just remove them from the label's layer.
- (IBAction)tap:(UITapGestureRecognizer *)sender
{
[self.label.layer removeAllAnimations];
self.label.alpha = 0;
[self presentNewView];
}
EDIT: A less abrupt way to finish would be to animate from the current view state to the final one (this will interrupt the current, repeating animation).
- (IBAction)tap:(UITapGestureRecognizer *)sender
{
[UIView animateWithDuration:1
delay:0
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
self.label.alpha = 0;
} completion:^(BOOL finished){
[self presentNewView];
}];
}
You could put a pair of chained animation in a loop or call a function that holds the chained animation everytime until you encounter a user tap.
By Chained animation, I mean something like this (You can set the animation duration to suit your needs):
myLabel.alpha = 0.0;
[UIView animateWithDuration:1.0
delay:0.0
options: UIViewAnimationCurveEaseOut
animations:^{
myLabel.alpha = 1.0;
}
completion:^(BOOL finished){
[UIView animateWithDuration:1.0
delay:1.0
options: UIViewAnimationCurveEaseOut
animations:^{
myLabel.alpha = 0.0;
}
completion:^(BOOL finished){
NSLog(#"Done!");
}];
}];
The above code will first fade in your label and then fade it out. You can put that in a function and call it until you encounter user tap.
Create a CABasicAnimation and add it to your label:
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:#"opacity"];
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.fromValue = #(1.0f);
animation.toValue = #(0.1f);
animation.repeatCount = INFINITY;
animation.duration = 0.75;
animation.autoreverses = YES;
[label.layer addAnimation:animation];
When you click on your button, just get a pointer to that label and remove all the animations:
[label.layer removeAllAnimations];
Try this it give you the ability to manage the animation repeat count if you replaced INFINITY with your repeat count
fadingLabel.alpha = 1.0;
[UIView beginAnimations:#"fadingLabel" context:nil];
[UIView setAnimationDuration:4.0];
[UIView setAnimationRepeatCount:INFINITY];
fadingLabel.alpha = 0.0;
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView commitAnimations];
Wayne Hartman's Answer in Swift 4
let animation = CABasicAnimation(keyPath: "opacity")
animation.fromValue = 1
animation.toValue = 0.1
animation.duration = 0.75
animation.repeatCount = .infinity
animation.autoreverses = true
label.layer.add(animation, forKey: nil)
and
label.layer.removeAllAnimations()
I'm trying to animate a view with some buttons and controllers for my main view into the screen from the right side of the screen. The problem is it doesn't animate, it just goes directly to the finished state.
This is my code:
UIStoryboard* storyBoard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
options = [storyBoard instantiateViewControllerWithIdentifier:#"OptionsView"];
options.delegate = self;
[self.view addSubview:options.view];
options.view.center = CGPointMake(floor(total_width+options.view.frame.size.width/2)+10, floor(total_height/2));
[UIView animateWithDuration:0.5
delay:0.0
options: UIViewAnimationOptionCurveEaseOut
animations:^{
options.view.center = CGPointMake(floor(total_width-options.view.frame.size.width/2)+10, floor(total_height/2));
}
completion:^(BOOL finished){
NSLog(#"Done!");
}];
EDIT
To make things more strange, if I put this animation inside the completion block of another animation then this one works, but not the new one.
UIButton* boton = (UIButton*) sender;
[UIView animateWithDuration:5.0
delay:0.0
options: UIViewAnimationOptionCurveLinear
animations:^{
boton.alpha = 0.0;
//Jumps directly to 0, animation doesn't work
}
completion:^(BOOL finished){
[UIView animateWithDuration:0.5
delay:0.0
options: UIViewAnimationOptionCurveEaseInOut
animations:^{
options.view.center = CGPointMake(floor(total_width-options.view.frame.size.width/2)+10, floor(total_height/2));
//It works now, but it doesn't take 5 seconds to start, it starts right away
}
completion:^(BOOL finished){
NSLog(#"Done!");
}];
}];
The line before the animateWithDuration:... call directly assigns the center to the same value that you're animating to. Either remove that or assign the initial center value there. An animation that has the same start and end values obviously has no effect.
Here's what I'm trying to accomplish.
A UILabel will appear on screen at 100% alpha and move up 80pts using a UIView animation. As soon as that animation ends, I want it to continue 80pts higher while fading out to alpha 0. I want these two animations to appear as one seamless animation.
I thought maybe I could do this with a UIView animation and then put a second UIView animation in the completion block as shown below. However, there appears to be a delay before the completion block is executed which prevents the two animations from appearing seamless.
Can anyone tell me the best way to do what I'm trying to do?
Thanks!
[UIView animateWithDuration:1.2 delay:0 options:UIViewAnimationCurveLinear animations:^{
myLabel.center = endPoint;
}
completion:^(BOOL finished) {
[UIView animateWithDuration:1.2 delay:0 options:UIViewAnimationCurveLinear animations:^{
myLabel.center = endPoint2;
myLabel.alpha = 0;
}
completion:^(BOOL finished) {
NSLog(#"animations complete");
}];
}];
This should work. I see no reason why not. Just a small addition, check for animation completion in finished block. As this will take care of any errors during animation. Also if you are planning to make this UILabel tappable then you need to make it so by setting the flag UIViewAnimationOptionAllowUserInteraction.
[UIView animateWithDuration:1.2 delay:0 options:UIViewAnimationCurveLinear | UIViewAnimationOptionAllowUserInteraction animations:^{
myLabel.center = endPoint;
myLabel.alpha = 1;
}
completion:^(BOOL finished) {
if(finished){
[UIView animateWithDuration:1.2 delay:0 options:UIViewAnimationCurveLinear | UIViewAnimationOptionAllowUserInteraction animations:^{
myLabel.center = endPoint2;
myLabel.alpha = 0;
}
completion:^(BOOL finished) {
NSLog(#"animations complete");
}];
}
}];
I know you can perform a two-stage animataion using blocks like so:
[UIView animateWithDuration:25.0 delay:0.0 options:UIViewAnimationCurveLinear animations:
^{
aView.alpha = 2.5;
}
completion:^(BOOL finished)
{
aView.hidden = YES;
}
];
..but how would I create a multistage (more than 2) animation using blocks?
Use nested animations:
[UIView animateWithDuration:0.5
delay:0.0
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
//first animation
}
completion:^(BOOL finished){[UIView animateWithDuration:0.5
delay:0.0
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
//second animation
}
completion:^(BOOL finished){//and so on..
}];}];
or you can make a recursive, multi-stage animation method:
-(void) multiStageAnimate{
[UIView animateWithDuration:0.5
delay:0.0
options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
//animation code
}
completion:^(BOOL finished){
if(/* If terminating condition not met*/)
[self multiStageAnimate];
}];
}
I realize this is an older question, but I thought I'd add my input.
I created a class for handling multistage animation, available here!
It only supports a single duration and option set currently, but I'll probably add more features.
Here's how you use it:
// Create New Animation
MSAnimation * newAnimation = [MSAnimation newAnimationWithDuration:0.35 andOptions:UIViewAnimationOptionCurveEaseInOut];
// Add Sequence
[newAnimation addNewAnimationStage:^{
greenView.center = CGPointMake(greenView.center.x, greenView.center.y + 100);
}];
[newAnimation addNewAnimationStage:^{
greenView.center = CGPointMake(greenView.center.x + 100, greenView.center.y);
}];
[newAnimation addNewAnimationStage:^{
greenView.center = CGPointMake(greenView.center.x, greenView.center.y + 100);
}];
[newAnimation addNewAnimationStage:^{
greenView.center = CGPointMake(greenView.center.x - 50, greenView.center.y);
}];
[newAnimation addNewAnimationStage:^{
greenView.frame = CGRectMake(0, 0, 100, 100);
}];
// Animate Your Sequence With Completion
[newAnimation animateSequenceWithCompletion:^{
NSLog(#"All finished!");
}];
Gives you:
I want to let a UIImageView flash several times.
Currently I don't know how to do that.
Actual code:
-(void)arrowsAnimate{
[UIView animateWithDuration:1.0 animations:^{
arrow1.alpha = 1.0;
arrow2.alpha = 1.0;
arrow3.alpha = 1.0;
NSLog(#"alpha 1");
} completion:^(BOOL finished){
[self arrowsAnimate2];
}];
}
-(void)arrowsAnimate2{
[UIView animateWithDuration:1.0 animations:^{
arrow1.alpha = 0.0;
arrow2.alpha = 0.0;
arrow3.alpha = 0.0;
NSLog(#"alpha 0");
} completion:^(BOOL finished){;}];
}
later on I call it like this:
for (int i = 0;i < 10; i++){
[self arrowsAnimate]; }
This gives me 10x alpha 1, and then 10x alpha 0. In the middle we see only one animation.
Any suggestions?
Thanks.
There is a simpler way to achieve a flashing animation using only 1 animation block:
aview.alpha = 1.0f;
[UIView animateWithDuration:0.5f
delay:0.0f
options:UIViewAnimationOptionAutoreverse
animations:^ {
[UIView setAnimationRepeatCount:10.0f/2.0f];
aview.alpha = 0.0f;
} completion:^(BOOL finished) {
[aview removeFromSuperview];
}];
The trick is to use [UIView setAnimationRepeatCount:NTIMES/2]; *_inside_* your animation block.
No need for extra functions or extra loops.
Use
+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion
and pass the UIViewAnimationOptionRepeat and probably UIViewAnimationOptionAutoreverse in your options. You shouldn't need to provide a completion block and only perform the first animation.
Edit: here is some sample code for an image that fades in and out indefinitely.
[UIView animateWithDuration:1.0
delay:0.0
options:(UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse)
animations:^{
self.myImageView.alpha = 1.0;
}
completion:NULL];
Edit 2: I see you actually need to flash it 10 times only. I wasn't able to do that with blocks actually. When the completion block executed, the animation seemed to complete instantly the remaining 9 times. I was however able to do this with just the old-style animations quite easily.
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];
[UIView setAnimationRepeatCount:10.0];
[UIView setAnimationRepeatAutoreverses:YES];
self.myImageView.alpha = 1.0;
[UIView commitAnimations];
Edit 3: I found a way to do this with blocks.
- (void)animate
{
if (self.animationCount < 10)
{
[UIView animateWithDuration:1.0
animations:^{
self.myImageView.alpha = 1.0;
}
completion:^(BOOL finished){
[self animateBack];
}];
}
}
- (void)animateBack
{
[UIView animateWithDuration:1.0
animations:^{
self.myImageView.alpha = 0.0;
}
completion:^(BOOL finished){
self.animationCount++;
[self animate];
}];
}
Above blinking may not work when your app go background and foreground at time of blinking.
Instead of these you can take a transparent image and your actual image and animate your ImageView
UIImageView *imageview=[UIImageView new];
imageview.animationDuration=1;
imageview.animationImages = your array of images;
[imageview startAnimating];
You need to wait for an animation to complete before launching a new one. You could chain your completion block in animate2 to go back to animate, and stop based on a counter property, implementing your loop in the animate/completion blocks instead of a separate loop.