I have a method like the following:
- (void)add:(id)sender {
MyAddViewController *controller = nil;
controller = [[MyAddViewController alloc] initWithAddType:1];
//controller.delegate = self;
// Do some animation. Slide it in from the right side of the screen.
CGPoint initialCenter = self.view.center;
controller.view.center =
CGPointMake(initialCenter.x + 320, initialCenter.y);
// Add the subview now with it's center + 320 off the screen.
[self.view addSubview:controller.view];
[UIView beginAnimations:#"animation" context:NULL];
[UIView setAnimationDuration:0.35];
[UIView setAnimationDelegate:self];
controller.view.center = CGPointMake(initialCenter.x, initialCenter.y);
//[UIView setAnimationDidStopSelector:#selector(aMethodToBeCalledAfterAnimationEnd:finished:context:)];
[UIView commitAnimations];
//[controller release];
}
You see I have a controller release as the last line in my add method. If I uncomment this line the animation completely dies and it just dumps the view into place with no animation.
Is there a better way to do release without having to create another method which does cleanup via [UIView setAnimationDidStopSelect:#selector(aMethodToBeCalledAfterAnmiationEnd... ?
Or can I do something like setAnimationDidStopSelector:#selector([controller release]) ? :)
Thanks in advance!
Using setAnimationDidStopSelector: is the proper way to solve the generic problem of releasing resources after an animation completes.
Take a step back and reconsider what you're doing here, though. Why are you looking to free the controller you just created? If you are only creating the controller for the purpose of getting at the view, that isn't the right way to do it. Build yourself a factory method to create your view, or use the methods in NSBundle to load the view from a NIB.
You can do this:
[UIView setAnimationDelegate: controller];
[UIView setAnimationDidStopSelector:#selector(release)];
I see you tagged this iphone-sdk-4.0. You could use the new block-based animations to do this and any other cleanup. See the documentation for details.
Related
I did some digging around about this, but nothing really seems to answer my particular question (not even this: Is it possbile to removeFromSuperview with Animation?).
Basically, my app starts with a welcome screen, where a user clicks on "sign in", then goes to the sign in view, then getting to a tab bar view, which is the actual app.
The way I did it, is that I wrote a custom class - TabBarController, which sets up all the tabs and their respective view controllers. Now, when the user clicks on "sign in" i am calling removeFromSuperview and present the tabbar.
I am trying to find a way to animate the transition from the sign in page to the tab bar. I tried some proposed solutions around here, but none seems to do the job. Here is my code in the signin.m view controller. I am looking to animate out the current view (ideally, not just by fading out, but more cool stuff like flips, etc.).
//when done signing in --> go to the tab bar view
-(IBAction)done:(id)sender {
TabBarController *tabController = [[TabBarController alloc] init];
[UIView beginAnimations:#"removeWithEffect" context:nil];
[UIView setAnimationDuration:4.0];
self.parentViewController.view.frame = CGRectMake(0,0,320,480);
self.parentViewController.view.alpha = 1.0f;
[UIView commitAnimations];
[self.parentViewController.view performSelector:#selector(removeFromSuperview) withObject:nil afterDelay:2.5f];
[self presentModalViewController:tabController animated:YES];
}
Appreciate any help!
That can't work that way. presentModalViewController dislpays the view of a viewController over the own view. It won't replace the source viewController (self).
Since you remove self.parentViewController.view from the view hierarchy, it can't present your tabController modally because you have removed self.
Anyway, i would recommend you another way to achieve your view layout:
Create a tabBarViewController and add its view to a rootView (self.window in the app delegate or whatever you are using now). Then add your login-view to the same view. Due the view hierarchy, the login-view will be displayed above the tabBar.view. And the done button should be implemented this way: (i'm using block syntax for animation as it should be)
-(IBAction)done:(id)sender {
[UIView animateWithDuration:1.0
animations:^{
self.view.frame = CGRectMake(0, 480, 320, 480);
self.view.alpha = 0.0
}
completion:^(BOOL finished){
[self.view removeFromSuperView];
}
];
}
You can animate more things than just the alpha, size or position. Just take a look about animations in the documentation. I guess, you'll be interested in view.transform to commit flip animations. ;)
This is how you have to remove the view after animating it.
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];
[UIView setAnimationDelay:2.0];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDelegate:myView];
[UIView setAnimationDidStopSelector:#selector(removeFromSuperview)];
[UIView commitAnimations];
Hope this helps.
Happy coding.
I am working on one iPhone application in which I implemented one animation UIViewAnimationTransitionFlipFromLeft. Here my application works fine in the Portrait mode. It is doing the same animation as specified means Flip from Left to Right.
But when I am doing this UIViewAnimationTransitionFlipFromLeft in landscape mode then it is not rotating from left to right. Instead of it is rotating from top to bottom. This is really critical issue. Can you help me out to solve this.
The code I am using for iPhone application to rotate the view is as follows:
CGContextRef context = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context];
[UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView:self.view.window cache:NO];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:1.0];
[UIView commitAnimations];
[self.navigationController pushViewController:objSecond animated:YES];
Thanks,
Best Regards,
Gurpritsingh Saini
If you are using iOS 4.0 or later, the following will do exactly what you want (I just tested it out to make sure)
NewView *myNewView = [[NewView alloc] initWith.....];
[UIView transitionFromView:self.view toView:myNewView.view duration:1 options:UIViewAnimationOptionTransitionFlipFromLeft completion:nil];
//[self.navigationController pushViewController:myNewView animated:NO];
[myNewView release];
EDIT: I'm changing the above code a bit (nothing new, just commenting out the navigation controller because it's not necessary for this).
So there are several ways to go about this (as far as keeping track of the next view), but this is the easiest I can think of. You can already switch from view 1 to 2, so I'm going to explain how to get from 2 to 10 (or however many you need).
Basically, the view transition lasts too long for viewDidLoad to catch a call to go to the next view. So what we need to do is set up a timer that waits and sends a method to switch at a later time. So this is the code you would see in view 2 (and 3 and 4, etc.).
- (void)viewDidLoad {
// this gets called before animation finishes, so wait;
self.navigationController.delegate = self;
// you will need to set the delegate so it can take control of the views to swap them;
[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:#selector(switchView) userInfo:nil repeats:NO];
}
I only wait 1 second until I call the switch method, but if you are loading a lot into your views, you may want to wait a bit longer. 1.5 seconds should be more than enough, but you can play around with that to see where it works and doesn't work.
Next, you have to call the next view in the switchView method.
- (void)switchView {
NextView *myNextView = [[NextView alloc] initWith ... ];
[UIView transitionFromView:self.view toView:nextView.view duration:1 options:UIViewAnimationOptionTransitionFlipFromLeft completion:nil];
[nextView release];
}
This worked perfectly for me. Just to make sure I was getting new views, I assigned tags to each view and added UILabels as subviews in each view's viewDidLoad method and each showed the number of its view. So hopefully this is what you needed. I'm sure you have more complex things you will need to do, but this will give you the animation and logic you need to get the look you want. (on a side note, viewDidAppear doesn't seem to get called when doing this, so it might be necessary to call it manually from viewDidLoad if you really need to use it, but otherwise it works fine)
You will have to manually add a transformation to your view; the flip transformation always operates as if the view controller were in portrait orientation.
Note that the context argument to +beginAnimations:context: is not meant to be a CGContextRef per se. You probably don't want to pass the current graphics context there. Pass NULL instead.
Try with this :
CABasicAnimation *rotateAnimation = [CABasicAnimation animationWithKeyPath:#"transform.rotation.y"];
CGFloat startValue = 0.0;
CGFloat endValue = M_PI;
rotateAnimation.fromValue = [NSNumber numberWithDouble:startValue];
rotateAnimation.toValue = [NSNumber numberWithDouble:endValue];
rotateAnimation.duration = 1.5;
[self.view.layer addAnimation:rotateAnimation forKey:#"rotate"];
CGContextRef context = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context];
[UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView:self.view cache:NO];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:1.0];
[UIView commitAnimations];
I think this will work out.
The Accepted answer by slev did not work for me, I got all sorts of errors after trying the code in my custom Segue. I found a method that not only works but is more precise as it doesn't require the use of a Timer. Here is MySegue.m:
#implementation FlipRightSegue
- (id)initWithIdentifier:(NSString *)iden source:(UIViewController *)sour destination:(UIViewController *)dest
{
self = [super initWithIdentifier:iden source:sour destination:dest];
return self;
}
- (void)perform
{
UIViewController *src = [self sourceViewController];
UIViewController *dst = [self destinationViewController];
//[UIView transitionFromView:src.view toView:dst.view duration:1 options:UIViewAnimationOptionTransitionFlipFromRight completion:nil];
//[UIView commitAnimations];
[UIView transitionWithView:src.navigationController.view duration:0.8 options:UIViewAnimationOptionTransitionFlipFromLeft
animations:^{
[src.navigationController pushViewController:dst animated:NO];
}
completion:NULL];
}
#end
I also have a second class for flips to the right.
Code was taken from this website: http://www.dailycode.info/Blog/post/2012/11/29/iOS-Custom-Flip-Segue-(portrait-and-landscape-layout)-xcode-4.aspx
I have the following code to do a UIView animation:
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:1.0];
[UIView setAnimationDelegate:self];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:mapView.view cache:NO];
[self addSubview:detailView];
[mapView removeFromSuperview];
[UIView commitAnimations];
It works when I dont add the detailView.
What actually happens is the equivalent of this:
[self addSubview:detailView];
[mapView removeFromSuperview];
i think you have the order wrong. you need to remove the old subview first before adding the new one.
see reference for setAnimationTransition:forView:cache:
you can also use CATransition on the layer of a view. and then use layer animations.
if you specifically want to flip the new view you can also use presentalModalViewController method of uiviewcontroller.
I have seen your code in tutorials all the time and never works for me. I always use this:
UIViewController *mainViewController = [[YourMainViewController alloc] init];
UIViewController *viewControllerToSwitchTo = [[ViewControllerToSwitchTo alloc] init];
[mainViewController presentModalViewController:viewControllerToSwitchTo animated: YES];
you can set the view changing style with:
[setModalTransitionStyle:WhateverModalTransitionStyleYouWant];
but make sure this goes before the transition method.
That code won't work. From Apple's documentation:
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.
So the transition should be applied to self not your mapView, and your add/remove are in reverse order.
I had to set the graphics context to UIGraphicsGetCurrentContext()
Im using some transitions(Flip) to switch to my "settings/about" view in my iPhone app.
I initiate the transition like this:
SettingsAboutViewController *settingsView = [[SettingsAboutViewController alloc] init];
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight
forView:[self.navigationController view ]
cache:YES];
[self.navigationController.view addSubview:settingsView.view];
[UIView commitAnimations];
In my SettingsAboutViewController's viewDidLoad method I set up all related graphics using setFrame:CGRectMake(x, y, w, h), there is no Nib involved.
My problem is that all the graphics seems to be positioned in 0,0 and only when the flip is 90% done does it "snap" into place.
I tried calling [super viewDidLoad] after the setup and before, I tried placing my setup code inside loadView instead, but all has failed so far.
It seems the view is not all build before I call the animation. I never had problems like this before and this particular view is not graphics heavy and demanding in any other way?
What is it I need to take into account?
Thanks.
How about using presentModalViewController?? Its simpler and easy to use..
SettingsAboutViewController *settingsView = [[SettingsAboutViewController alloc] initWithNibName:#"SettingsAboutViewController " bundle:nil];
settingsView.delegate = self;
// The magic statement. This will flip from right to left. // present the modal view controller then when you dismissModalViewController.
// it will transition flip from left to right. Simple and elegant.
settingsView.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:settingsView animated:YES];
[settingsView release];
I think that would solve your problem.
Good Luck..!
I tried to add a animation to viewDidLoad and viewDidAppear, but it doesn't work:
- (void)viewDidAppear:(BOOL)animated{
[UIView beginAnimations:#"transition" context:NULL];
[UIView setAnimationTransition:110 forView:self.view cache:YES];
[UIView commitAnimations];
}
Why?
I had the same problem and I think I found the solution on this SO question.
When viewDidAppear gets called you still don't see anything on the screen (despite the name), but you are about to. You can then use a performSelector:withDelay or an NSTimer to launch your animation. The delay can just be 0.1 and your animation will play just when the screen appears.
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
NSLog(#"View did appear!");
[self performSelector:#selector(animationCode) withObject:nil afterDelay:0.1f];
}
- (void)animationCode {
// you animation code
}
You are not telling the view which state it should animate to so it won't do anything. You need to place code between beginAnimations:context: and commitAnimations that changes the appearance of the view (e.g. by removing one subview and adding another).
You're not using beginAnimations: and commitAnimations correctly. You're supposed to put something in between them that normally wouldn't be animated: e.g. with self.view.alpha = 0.5 you get a fading effect. They have no effect on anything that isn't between them.
By the time viewDidAppear: is called, your view, well... has appeared. It's too late to animate anything. What you actually want to do is something like this:
- (void)showMyViewWithAnimation {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationTransition:110 forView:childView cache:YES];
[parentView addSubview:childView];
[UIView commitAnimations];
}
In the example above, childView is what in your example is called self.view.
Please write out the name of the transition; no one knows what 110 is by looking at it. It's bad style. </pedantry>