I am using the code snippet from Tito to add a custom button to my tab bar:
https://github.com/tciuro/CustomTabBar
(Subclassing UITabbarController and adding a custom button using
// .. created a UIButton *button
[self.view addSubview:button];
)
This works great with my storyboard-based app except for the case of a subview within a navigation controller with the option "Hides bottom bar on push" enabled.
This hides the tab bar as promised, but not the custom button.
Seems like the button should be added as a subview to the tab bar itself?
I tried this ugly code which did not even make the button show up:
for(UIView *view in self.view.subviews)
{
if([view isKindOfClass:[UITabBar class]])
{
[view addSubview:button];
break;
}
}
Any ideas?
UPDATE:
My solution:
In my ApplicationDelegate i define the following methods, which i call whenever needed in the viewWillAppear or viewWillDisappear methods:
-(void)hideCenterButton:(BOOL)animated
{
if(animated){
[UIView animateWithDuration:0.3
delay:0.0f
options:UIViewAnimationCurveLinear
animations:^{
CGRect frame = self.centerButton.frame;
frame.origin.x = -100;
self.centerButton.frame = frame;
}
completion:^(BOOL finished){
}];
}
}
-(void)showCenterButton:(BOOL)animated
{
if(animated){
[UIView animateWithDuration:0.35
delay:0.0f
options:UIViewAnimationCurveLinear
animations:^{
CGRect frame = self.centerButton.frame;
frame.origin.x = (self.view.superview.frame.size.width / 2) - (self.centerButton.frame.size.width / 2);
self.centerButton.frame = frame;
}
completion:^(BOOL finished){
}];
}
}
I had to set the animation's duration to 0.35s to get a smooth effect in harmony with the tab bar.
Why don't you make button your tabbar's part.
tabBarController.tabBar.addSubView(yourButton)
everything would be solve. cheers!
One easy way to handle this would be to create an instance of the button in .h of your file.
UIButton *customTabButton;
When calling the hides bottom bar on push set the button property to hidden and reset it again in the other views if the bottom bar is visible.
shareFbButton.hidden=YES;
You can check this is the viewDidLoad of all the files and put this line of code if needed to make sure you are displaying the button and hiding the button on all the pages you need.
if(self.tabBarController.tabBar.isHidden){
// set or reset the custom button visibility here
}
This is one way.
I think there are 2 ways you can got with this.
1) try to get the button into a view that is above the old top view controller and the tab bar BUT below the new top view controller that is pushed.
2) animate away the button when the new view controller is pushed.
The first will require mucking with the iOS proprietary view hierarchy which is undocumented, unsupported and could change anytime.
The second will be a matter of making the animation appear smooth enough for your user not to notice. It's not entirely a matter of behaving perfect, just appearing appropriately.
I would personally recommend an animation of the the button disappearing (animate it's alpha to 0) and reappearing based on if your view controller that goes over the tab bar is appearing or disappearing.
The animation for a navigation is (I believe) 0.3 seconds. If the button is in the middle of the tab bar, you'll likely want it invisible as the animating in view controller reaches it (if not sooner) so something between 0.1 and 0.15 seconds could be used to animate it out.
Now this does not make the button behave exactly the same as the tab bar, but with the quickness of the transition being so short, it will be unnoticeable really to the user.
Now just to provide a question for you to ask yourself. Why do you need to push a view controller that overlaps the tab bar? Why is that more desirable/necessary than presenting a modal view controller? If you can strongly argue for it, keep at it and good luck, if it's not necessary however, you may be able to achieve the experience you want with a modal view controller.
Check this one to put a button on the UITabBar. See if it works after with hidesBottoBarWhenPushed.
Related
I'm using a UINavigationBar in a regular UIViewController (not a UINavigationController) and updating the contents of the navigation bar using setItems:animated, pushNavigationItem:animated and popNavigationItem:animated, with animated set to YES.
Works fine, except that I would like the crossfade animation of the navigation bar, rather than the built-in animation which "pushes" the previous bar to left or right.
So far the only way I can see how to do this would be to manually set the title, left and right contents of the bar, using setLeftBarButtonItems:animated, setRightBarButtonItems:animated and probably a custom view for the title with setTitleView so that I can do the crossfade.
Anybody has a better solutions to my problem?
Just tried this and it worked:
[UIView transitionWithView:self.navBar duration:2.0f options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
myNavigationItem.leftBarButtonItem = newLeftItem;
myNavigationItem.rightBarButtonItem = newRightItem;
myNavigationItem.title = #"My New Title";
} completion:nil];
Does anyone has an idea if PKRevealController has a method to add an overlay (dim) effect to the hidden controller when the right/left view slides in ?
https://github.com/pkluz/PKRevealController
Like I saw inside the example code, you can check which kind of state you have for a specific UIViewController. Can't you add a new UIView make it black with alpha:0.6 and set it hidden. If the UIViewController did change to the state in background, animate the hidden View like
[UIView animateWithDuration:0.5 animations:^{
[OverlayView setHidden:NO];
}];
Inside viewDidAppear you can check if your OverlayView is hidden:YES and animate it to NO.
i implemented the method in ViewController A
- (BOOL)prefersStatusBarHidden {
return NO;
}
i implemented the method in ViewController B
- (BOOL)prefersStatusBarHidden {
return YES;
}
- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation {
return UIStatusBarAnimationSlide; // when doing hiding animation i want it to slide up
}
i implemented a class T that conforms for viewController transitioning say AtoBTransition, i used this ViewControllerTransition for Transitioning From vc(viewcontroller) A to vc B. when transitioning to vc B i want the status bar to slide up (hide with sliding animation) but in this case, it seems that it doesn't do that the sliding animation.
Questions: Just Assume that i didn't do UIStatusBar related code in class T, and didn't add the value View controller-based status bar appearance in info plist. And transition T works perfectly as needed.
i'm sure the code reads in -preferredStatusBarUpdateAnimation by doing breakpoint or logging but why it didn't hiding statusbar animation by sliding? when i toggle to slowmotion in simulator. it appears it doesn't do animation.
my theory is that it conflicts with transition animation context, so is it possible to do animation of hiding UIStatusBar within the implementation of T as part of its transition scheme?
is it possible to do UIStatusBar animation along with ViewControllerAnimationTransition?
feel free to clear some stuff. thanks ahead.. :)
I don't think you can do this directly with iOS 7 's view controller transition API.
Now, I'm assuming based on the hooks to this API and the status bar API that the status bar is an animal unto itself and is not available for animating with a custom transition. I think this is the case because when the UIViewControllerContextTransitioning transitionContext is created for you view controller A is already added to it's containerView and because you're responsible for adding view controller B to the containerView (because you need to transition to it) all of view controller B's status bar manipulation methods are fired when you do so.
However, you can animate UIApplication's keyWindow's frame during your animation transition So in the -animateTransition: method of your class that implements UIViewControllerAnimatedTransitioning.
[UIView animateWithDuration:[self transitionDuration:transitionContext] delay:0.0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
[UIApplication sharedApplication].keyWindow.frame = CGRectMake(0, 0, 320, 568); // move frame up
} completion:^(BOOL finished) {
// assuming
[UIApplication sharedApplication].keyWindow.frame = CGRectMake(0, 20, 320, 568); //move frame down
}];
If you go with this approach, you'll probably need to adjust the frame of the key window in view controller A to drop below the status bar and be styled light/dark as needed. Then do the opposite to get the effect you want in view controller B. Its nasty, but it could work.
Here's the situation:
I am making an app for iPad w/ iOS 6 using Autolayout along with UINavigationController. What I am trying to do is:
Segue from one view controller to the next with a standard push segue.
When I arrive at the new view controller, hide the nav bar with animation.
As the nav bar hides, I want my view to not shift at all. In fact, I want my view to effectively be drawn underneath the nav bar from the beginning, so I'm left with no shifting or movement of content and no black bars. For reference, this is what happens in the Amazon Kindle app when you go into a book.
With my current code, the contents of my view shift up to fill in the void left by the UINavigationBar.
I've tried force-setting the frame of my UIViewController's view and my UINavigationController's view to the entire iPad screen in the viewWillAppear method of my viewcontroller but no dice. I've experimented w/ Constraints in Autolayout but that also didn't get me to where I wanted to go.
Any help you can give would be great!
Try following before animating the navigation bar:
self.navigationController.navigationBar.alpha = 0.99f;
I didn't try this but this should work.
Looks like you need to add custom navigation bar in your new view and animate it to disappear.
I think, hiding original Navigation bar of Navigation Controller without shifting the view is not possible.
Rather add UINavigationBar to xib file, bind it to IBOutlet uiNavigationBar and try following code
-(void) viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:NO];
}
- (void) viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[UIView animateWithDuration:0.3f delay:0.0f options:UIViewAnimationOptionCurveEaseInOut animations:^{
CGRect f = self.uiNavigationBar.frame;
f.origin = CGPointMake(f.origin.x, f.origin.y - 44);
self.uiNavigationBar.frame = f;
} completion:^(BOOL finished) {
NSLog(#"done");
}];
}
I have a navigation bar based ipad app.
At some point I want to push another view controller into the views controller hierarchy. Then, when the users tabs some button I want to show a leftMenu controller. To do so I have two views:
A content view which has all the content
And a not visible view which is the leftMenu. This one is under the content view.
So when the user presses the button, what Im doing right now is moving the content view and the navigation bar to the right to make the leftMenu visible:
self.navigationController.navigationBar.frame = CGRectMake(271.0, self.navigationController.navigationBar.frame.origin.y, self.navigationController.navigationBar.frame.size.width, self.self.navigationController.navigationBar.frame.size.height);
self.contentView.frame = CGRectMake(271.0, self.contentView.frame.origin.y, self.contentView.frame.size.width, self.contentView.frame.size.height);
This is working, but the first row in the left menu is not "clickable" where the nav bar is supossed to be. Its like the navigation bar is still there capturing the tab events.
Is it correct to do?:
self.navigationController.navigationBar.frame = CGRectMake(271.0, self.navigationController.navigationBar.frame.origin.y, self.navigationController.navigationBar.frame.size.width, self.self.navigationController.navigationBar.frame.size.height);
If not, whats the propper way to achieve what I want?
Heres and image ilustrating what the problem is:
I think it's best to use a custom container controller to do this kind of thing, rather than moving a navigation bar. In IB, this can be set up quite easily. Start with a UIViewController, add a container view to it, and size how you want. Then in the inspector, set its x value to minus its width, which will put it off screen to the left. Then add another container view and size it to be full screen. You can then delete the view controller that you got with that container view, and right drag from the container view to your initial navigation controller (of your already setup UI) to connect it up with an embed segue. The UIViewController that you started with should be made the initial view controller of the storyboard. To move in the side view, I use this code in that custom container controller:
-(void)slideInLeft {
if (isRevealed == NO) {
[UIView animateWithDuration:.6 animations:^{
leftView.center = CGPointMake(leftView.center.x + 100, leftView.center.y);
mainView.center = CGPointMake(mainView.center.x + 100, mainView.center.y);
} completion:^(BOOL finished) {
isRevealed = YES; ;
}];
}else{
[UIView animateWithDuration:.6 animations:^{
leftView.center = CGPointMake(leftView.center.x - 100, leftView.center.y);
mainView.center = CGPointMake(mainView.center.x - 100, mainView.center.y);
} completion:^(BOOL finished) {
isRevealed = NO;
}];
}
}
leftView and mainView are IBOutlets to the 2 container views. I call this method from a button in the main view controller (the root view controller of the navigation controller that's embedded in the large container view):
-(IBAction)callSlideIn:(id)sender {
[(ViewController *)self.navigationController.parentViewController slideInLeft];
}
I found a "fast" way to achieve this (and a bit hacky imo)
I added the leftMenu view to the top view in the views hierachy:
UIWindow* window = [UIApplication sharedApplication].keyWindow;
if (!window)
window = [[UIApplication sharedApplication].windows objectAtIndex:0];
[[[window subviews] objectAtIndex:0] addSubview:self.leftMenu.view];
Now it is les deep than the navigation bar and, of course, its clickable