I have 2 views which are the same size, with colourPreview set as a subview of self.view. This is my code for showing the animation:
-(void)startEditingHexLabel {
[UIView animateWithDuration:0.3
animations:^{
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:hexTextView cache:YES];
[colourPreview removeFromSuperview];
[self.view addSubview:hexTextView];
[self.view sendSubviewToBack:colourPreview];
}
completion:^(BOOL finished){
[hexText becomeFirstResponder];
}];
}
But it just changes to the new view without a transition. Any ideas?
Have you tried using transitionWithView:duration:options:animations:completion: (docs here). Seems this is preferred in iOS 4.0+. There's an example of how to use it in those docs.
If you want to use your current method, I think forView in [UIView setAnimationTransition:forView:cache:] needs to be the superview of the views you want to animate. In your case, this looks to be self.view. Full docs here.
HTH
Related
I want to be able to fade in a sub view. Is there a way to animate that so that when my subview gets added it fades in and not just is all of a sudden pops up there. I know I could get several instances of my imageview with different alphas and then animate it that way but isn't there an easier way?
Yes, you can animate the view without needing different images. The below code will fade your view in over 0.3 seconds.
[myView setAlpha:0.0];
[myView setHidden:NO];
[UIView animateWithDuration:0.3 animations:^{
[myView setAlpha:1.0];
}];
You need only one instance. UIView.alpha can be animated.
You can set the alpha to 0 before adding the subview, and after your addSubview, you make an animation, like that:
yourView.alpha = 0.0f;
[self.view addSubview:yourView];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5f];
yourView.alpha = 1.0f;
[UIView commitAnimations];
In my viewcontroller i am using animation for changing the frame of UIButton and UIView, going from portrait to landscape user can see views growing but problem is animation is leaking everywhere and showing everything coming from different sides.
Here is the code
[UIView beginAnimations:Nil context:Nil];
[UIView setanimationDuration:1];
[view1 setFrame:CGRectMake(100,100,200,300)];
[UIView commitAnimations];
Thanks
Please elaborate more on what "leaking everywhere" means, and does it make a difference if you use block animation:
[UIView animateWithDuration:1.0 delay:0.0 options:nil animations:^{
[view1 setFrame:CGRectMake(100,100,200,300)];
}completion:^(BOOL done){
if (done) {
NSLog(#"animation complete");
}
}];
According to Apple's documentation:
In iOS 4 and later, use the block-based animation methods.
(Recommended)
My UIViewController gets the view it is controlling to completely rebuild itself with something like this:
[self.view rebuildYourself:bIsLandscape]; // this line is in the ViewController
The view itself then contains the following method:
-(void)rebuildYourself:(BOOL)isLandscape
{
NSArray *viewsToRemove = [self subviews];
for (UIView *v in viewsToRemove) {
[v removeFromSuperview];
}
[self addControls]; // adds lots of views
[self layoutControlsWithOrientation:isLandscape]; // frames the views
}
I would like to animate the entire transition. I have tried this:
[UIView animateWithDuration:1.0
delay:0.0
options:UIViewAnimationOptionTransitionCurlUp
animations:^{
[self.view rebuildYourself:bIsLandscape];
}
completion:^(BOOL finished){
}];
but the animation ignores the options value of UIViewAnimationOptionTransitionCurlUp and flows in from the top left corner every time.
and I have tried this:
[UIView beginAnimations:#"kkk" context:nil];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.view cache:YES];
[UIView setAnimationDuration:1.0];
[self.view rebuildYourself:bIsLandscape];
[UIView commitAnimations];
but in this case the transition does curl up nicely but the underlying view is blank until the transition has finished, and then the new view suddenly 'pops' into view, which spoils the effect of the transition.
Can anyone tell me the right/best way to animate a transition where the view rebuilds itself completely?
Thanks
Make two views and put the old view overtop of the new re-built view. Then 'Curl-up' the old view so that the new view is showing and remove the old view from memory.
I have a working view animation, that curls up a container view, while the containerview.subviews changes. (before the animation a UITableView will be shown, after it is a custom view, name keypadView)
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:.75];
[UIView setAnimationDelegate:self];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp
forView:containerView
cache:YES];
[secondView removeFromSuperview];
[containerView addSubview:keypadView];
[UIView commitAnimations];
Now I want to rewrite this code for the iOS4 block-based api, as I want to use the completion block. I wrote this:
[UIView transitionWithView:containerView
duration:.75
options:UIViewAnimationTransitionCurlUp
animations:^{
NSLog(#"Hey Ho");
[secondView removeFromSuperview];
[containerView addSubview:keypadView];
}
completion:NULL];
The views switch — but not animated.
what is wrong with my code?
Edit
completion: ^(BOOL completed){
NSLog(#"completed %d", completed);
}
doesn't help, as NULL is an accepted value, according to the docs
do:
options:UIViewAnimationOptionTransitionCurlUp
instead of:
options:UIViewAnimationTransitionCurlUp
That is why your code works now :).
The sample in the UIView class reference may be wrong - or maybe there's a bug with adding and removing views in the animations block object, but the only way I've been able to get it to work is as follows:
[secondView removeFromSuperview];
[containerView addSubview:keypadView];
[UIView transitionWithView:containerView
duration:.75
options:UIViewAnimationOptionTransitionCurlUp
animations:^{}
completion:^(BOOL finished) {
NSLog(#"finished %d", finished);
}];
Did you leave [UIView beginAnimations:nil context:nil]; above your new block?
Is the completion block always NULL? Try putting an NSLog statement in there or something. I don't know if NULL blocks would mess it up.
I am trying to dismiss a modalviewcontroller with a page curl. The curl works okay but I cannot seem to get the tableview under the modalviewcontroller to show up. The image of the modalviewcontroller is still under the curled away page. If I dismiss the modalviewcontoller before the animation finishes the animation doesn't show up. Here is my code:
//hide splash screen
- (void)hideSplash{
[UIView beginAnimations:nil context:nil];
//change to set the time
[UIView setAnimationDuration:2];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:modelView cache:NO];
// do your view swapping here
//[[self modalViewController] dismissModalViewControllerAnimated:NO];
[UIView commitAnimations];
//[self.view sendSubviewToBack:self.view];
}
Hope someone can help! Cheers Nick
In iOS4:
To present, it's something like:
[containerView addSubview:modelView];
[UIView transitionWithView:containerView
duration:.75
UIViewAnimationOptionTransitionCurlUp
animations:^{}
completion:^(BOOL finished) {
NSLog(#"finished %d", finished);
}];
To dismiss, use UIViewAnimationOptionTransitionCurlDown.
Your setAnimationTransition: shouldn't be forView:modelView; it should be for the parentView.
[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:containerView cache:NO];
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIView_Class/UIView/UIView.html
If you want to change the appearance
of a view during a transition—for
example, flip from one view to
another—then use a container view, an
instance of UIView, as follows:
Begin an animation block.
Set the
transition on the container view.
Remove the subview from the container
view.
Add the new subview to the
container view.
Commit the animation
block.
Use of this method is
discouraged in iOS 4.0 and later. You
should use the block-based animation
methods instead.