All I can seem to find in examples are using transforms or are modifying frames. Have I missed something obvious? Currently the other animations (fades) are all working fine, however the constraint stays locked in position.
A quick code snippet:
[[customViewController view] layoutIfNeeded];
[UIView animateWithDuration:2 animations:^{
[[customViewController constraintToAnimate] setConstant:1024];
[[customViewController view] layoutIfNeeded];
} completion:^(BOOL finished) {
[transitionContext completeTransition:YES];
}];
You need to call layoutIfNeeded on the [[customViewController view] superview]
Related
Is there a way to adjust the duration and curve of the setNavigationBarHidden method of a UINavigationController? It appears far too quickly and does not mesh with the other animations on my app.
You could create your own hide animation as follows:
[UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionCurveEaseIn animations:^{
self.navigationController.navigationBar.alpha = 0;
} completion:^(BOOL finished) {
[self.navigationController setNavigationBarHidden:YES animated:NO];
}];
I'm working on a page-based iPhone app using Xcode 4.4 with ARC and have been stuck on this for awhile. On a certain page, a UIImageView finger needs to slide up and point to something and then slide left off the screen. This works as expected when I run it once, but when I turn the page and go back - there is now 2 fingers sliding about 0.5 seconds out of sync with eachother.
Here's the code:
-(void)fingerSwipeUp:(UIImageView *)imageView
{
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
[imageView setCenter:CGPointMake(213.75,355.5)];
[UIView commitAnimations];
}
-(void)fingerSwipeLeft:(UIImageView *)imageView
{
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
[imageView setCenter:CGPointMake(-80,355.5)];
[UIView commitAnimations];
}
UIImageView *finger = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"finger.png"]];
// position finger off the screen
[finger setFrame:CGRectMake(142.5,480,152.5,243)];
[self.view addSubview:finger];
[self performSelector:#selector(fingerSwipeUp:) withObject:finger afterDelay:6];
[self performSelector:#selector(fingerSwipeLeft:) withObject:finger afterDelay:8];
Any help greatly appreciated
I'm guessing that you're creating the "finger" view in ViewDidAppear()? If that's the case, every time the page is turned (hidden) and then gone back to, you're adding another arrow (subview). What about this instead:
if (finger == nil) {
finger = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"finger.png"]];
[finger setFrame:CGRectMake(142.5,480,152.5,243)];
[self.view addSubview:finger];
}
[self performSelector:#selector(fingerSwipeUp:) withObject:finger afterDelay:6];
[self performSelector:#selector(fingerSwipeLeft:) withObject:finger afterDelay:8];
If you've got a number of animations in a sequence, you might find it easier to use the block-based UIView animation syntax:
[UIView animateWithDuration:1.0 delay:6.0 options:UIViewAnimationCurveEaseInOut animations:^{
// animation 1
} completion:^(BOOL finished) {
[UIView animateWithDuration:1.0 delay:8.0 options:UIViewAnimationCurveEaseInOut animations:^{
// animation 2
}];
}];
This will only start animation 2 after animation 1 has finished, so you don't need to worry about allowing for the duration of animation 1 when delaying animation 2.
I have an UIView with a pic inside (65x65) and I want to "flip" this UIView with a blank UIView but it doesn't work. I only can flip my view with the same view, when I'm adding the blank view, it works but not with the flip animation.
Here is my code who works :
[UIView transitionWithView:myView
duration:0.5
options:UIViewAnimationOptionTransitionFlipFromLeft
animations:^{
//[myView removeFromSuperview];
// [self.view addSubview:tmp];
}
completion:^(BOOL finished){
[myView removeFromSuperview];
}];
The commented part is what I was trying to do, "tmp" is the blank UIView (init with myView.frame) and of course I remove the line in the "completion" part.
What am I doing wrong ?
Thanks for you help.
Try this
[UIView transitionFromView:myView toView:tmp duration:0.5
options:UIViewAnimationOptionTransitionFlipFromLeft
completion:^(BOOL finished) {
[myView removeFromSuperview];
}];
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.
I have a UIViewController that should control 2 UIImageViews to fade in.
I managed to animate them using the UIView animateWithDuration method, like this:
[UIView animateWithDuration:1.5
animations:^{
[mFrontpageTitle setAlpha:0];
[mFrontpageTitle setAlpha:1];
}
completion:^(BOOL finished){
[self AnimatePause];
}];
and
-(void)AnimatePause {
[UIView animateWithDuration:5.0
animations:^{
[mFrontpageTitle setAlpha:0.99];
[mFrontpageTitle setAlpha:1];
}
completion:^(BOOL finished){
[self AnimateAuthor];
}];
which fires the next animation. Now, creating a transition from .99 to 1.0 is not very clean.
Is there a better way to trigger a block or sending a message by just defining a duration?
thanks
Zuppa
NSTimeInterval delay = 1.5; //in seconds
[self performSelector:#selector(myMethod) withObject:nil afterDelay:delay];