in my viewcontroller entered all the objects in a scrollview. One of the buttons inside the scrollView creates an animation.
The scrollView get off the page -80.0 orgine.y
So far so good .. Now I want that when you click on the button the scrollview and then goes back down to -80.0 to +80.0 automatically returning to its original position so ... Can you tell me the best method for you to have this?
This is the action that fulfills my button when pushed ...
- (IBAction)AcceptFriendRequest:(id)sender {
PFObject *SelectedUser = [self.UtentiInAttesa objectAtIndex:[sender tag]];
[SelectedUser setObject:#"Confermato" forKey:#"STATO"];
[SelectedUser saveInBackground];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDelegate:self];
[UIView setAnimationDuration:0.2];
[UIView setAnimationBeginsFromCurrentState:YES];
FFScrollView.frame = CGRectMake(FFScrollView.frame.origin.x, (FFScrollView.frame.origin.y - 80.0), FFScrollView.frame.size.width, FFScrollView.frame.size.height);
[UIView setAnimationRepeatAutoreverses:YES];
[UIView commitAnimations];
}
In your button event handler
- (IBAction)myBtnClicked:(id)sender {
// Create new CGRect indicate place where you would scroll to.
// Assume it is called `originalRect`
// Use the following method, it should work
[FFScrollView.scroll scrollRectToVisible:originalRect animated:YES];
}
Related
Is there any way to fade a bar button item, as there is no .alpha attribute to set. I'm interested in fading a button out and fading another button in to take its place on the navigation bar. Is there any way to do this?
EDIT: I am trying to fade the top right Bar Button Item
I understand fading is usually accomplished with the .alpha as I stated before.
My issue is for a Bar Button Item there is NO alpha attribute.
As seen here:
As opposed to a normal button where there is an .alpha attribute:
How can I fade a Bar Button Item?
Easy. You would have to create an outlet for them both then create if statements or whatever method you want to initiate the fade in/ fade out animations:
- (void) animateButton {
button1.alpha = 0;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDelegate:self];
[UIView setAnimationDuration:.5];
button1.alpha = 1;
[UIView setAnimationDidStopSelector:#selector(animationDidStop:finished:context:)];
[UIView commitAnimations];
}
- (void) animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:.5];
button1.alpha = 0;
[UIView commitAnimations];
}
swift
viewDidLoad {
self.button1.alpha = 1
self.button2.alpha = 0
}
When you call Animation Code:
UIView.animateWithDuration(1.0, animations: {
self.button1.alpha = 0
})
// Changing buttons based on UIControlState: You can also do this in storyboard by dragging a bar button item to your view controller and ctrl+drag to your .h file to create an outlet and then commit your animations or code based on what you want.
UIImage *backButtonImage = [[UIImage imageNamed:#"button_back"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 13, 0, 6)];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
I have this app that has tabs and each tab's root view controller is a navigation controller. I want to display my splash screen or launch image while the app is busy parsing JSON and loading it up in my core data stack and remove it from superview using a fade out animation. I tried this code to make it work but I'm stuck since the image is only displayed on the view inside the navigation controller. What I wanted is to view it full screen with the status bar on top like what you see when launching an app.
_launchImageView = [[UIImageView alloc] initWithFrame:[UIScreen mainScreen].bounds];
if (kFourInchDevice) {
_launchImageView.image = [UIImage imageNamed:#"Default-568h#2x.png"];
}
[self.view addSubview:_launchImageView];
[self.view bringSubviewToFront:_launchImageView];
And this is my code when dismissing it:
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationTransition:UIViewAnimationTransitionNone forView:self.view cache:YES];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(launchImageFadeAnimationDidFinished)];
_launchImageView.alpha = 0.0;
[UIView commitAnimations];
- (void)launchImageFadeAnimationDidFinished
{
[_launchImageView removeFromSuperview];
}
Any ideas on how to do this? Thanks!
I think you are having problem of hiding NavBar in splash screen isnt it ?
Just Add one extra ViewController in your story board.
Then under Utilities ( left side bar ) under Attribute Tab - View Controller make VC initial View Controller.
Call following in your View Did Load
- (void) hideNavBar {
UINavigationBar *navBar = self.navigationController.navigationBar;
navBar.hidden = TRUE;
}
Then when you you finish your json parser -
#pragma mark - Delegates
#pragma mark JSON Request
-(void) connectionReady; {
NextVC *viewController = [self.storyboard
instantiateViewControllerWithIdentifier:#"NextVC"];
[self.navigationController pushViewController:viewController
animated:YES];
}
Then finally in NextVC
- (void) showNavBar {
UINavigationBar *navBar = self.navigationController.navigationBar;
navBar.hidden = FALSE;
}
i read alot about faking the animation of pushViewController, but I'm wondering if there is a way to change the actually animation, because I would like to use the navBar and the BackButton of the navigationController.
Currently I'm using this to animate:
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:YES];
[views setContentSize:CGSizeMake(self.view.bounds.size.width, self.view.bounds.size.height -40)];
CGRect frame = views.frame;
frame.origin.y = - self.view.bounds.size.height;
[UIView beginAnimations:#"viewSlideUp" context:nil];
[UIView setAnimationCurve: UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.75];
[UIView setAnimationDelegate:self];
views.frame = frame;
[UIView commitAnimations];
}
but I get an overlapping effect, so my view isn't sliding up, the view is sliding away to the top left side.
Has anyone dealed with that problem? Thx for any kinda help!
I want to put an animation to custom UIButton's title so that the numbers (each title shows a random assigned number) will come rotating. How can i do that?
The problem is i don't want to do this using flipping number images. i am wondering if there is any other way.
Assuming that you have a button called flipLabelButton connected as IBOutlet to your view controller, you can use this code to animate your button to a new label:
- (IBAction)flipLabelText:(id)sender {
NSString *newText = [NSString stringWithFormat:#"%d", rand() % 100];
[UIView beginAnimations:#"flipbutton" context:NULL];
[UIView setAnimationDuration:1.0];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.flipLabelButton cache:YES];
[self.flipLabelButton setTitle:newText forState:UIControlStateNormal];
[UIView commitAnimations];
}
I have a UIView that contains a couple UIButtons that I am animating from offscreen to onscreen. I find that the region where they are heading is clickable before they reach it. The animation is pretty simple, so I'm wondering if there is something obvious that I am missing in terms of telling the code to not treat the button as if it is at the final destination (I'm not sure if that is supposed to be the expected behavior and the animation is purely a visual while the clickable region is instantaneously at the destination; I wouldn't expect it to be).
Here is the code I use to animate it. It's basically switching out a sub panel and bringing back a main panel with buttons:
// switch back to main abilities panel
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration: kFadeInTime];
CGRect rect = CGRectMake(
480.0f,
mAbilities.mSubPanel.frame.origin.y,
mAbilities.mSubPanel.frame.size.width,
mAbilities.mSubPanel.frame.size.height);
mAbilities.mSubPanel.frame = rect;
[UIView commitAnimations];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration: kFadeInTime];
[UIView setAnimationDelay: kFadeInTime];
rect = CGRectMake(
kAbilitiesBorderX,
mAbilities.mPanel.frame.origin.y,
mAbilities.mPanel.frame.size.width,
mAbilities.mPanel.frame.size.height);
mAbilities.mPanel.frame = rect;
[UIView commitAnimations];
As a workaround you can disable user interaction with your panel before animations and reenable it when animation finishes:
// Animation compete handler
- (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context{
mAbilities.mSubPanel.userInteractionEnabled = YES;
}
// Animating panel
mAbilities.mSubPanel.userInteractionEnabled = NO;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration: kFadeInTime];
[UIView setAnimationDelegate: self];
CGRect rect = CGRectMake(
480.0f,
mAbilities.mSubPanel.frame.origin.y,
mAbilities.mSubPanel.frame.size.width,
mAbilities.mSubPanel.frame.size.height);
mAbilities.mSubPanel.frame = rect;
[UIView commitAnimations];
If you're targeting iOS4 you can (and as specs say should) use block-based animation api:
[UIView animateWithDuration:5.0f delay:0.0f options:UIViewAnimationOptionLayoutSubviews
animations:^(void){
CGRect rect = CGRectMake(
480.0f,
mAbilities.mSubPanel.frame.origin.y,
mAbilities.mSubPanel.frame.size.width,
mAbilities.mSubPanel.frame.size.height);
mAbilities.mSubPanel.frame = rect;
}
completion:NULL
];
While animating using blocks user interaction is disabled by default - you can enable it by setting UIViewAnimationOptionAllowUserInteraction flag in options parameter:
... options:UIViewAnimationOptionLayoutSubviews | UIViewAnimationOptionAllowUserInteraction ...