Alright so I am trying to create a slide out side view for navigation in my app, similar to Facebook and many others. I have that part working but the navigation controller doesn't respond to any touch events. I have a feeling this is because I am having my subclassed Navigation Controller add the child view controller and subview, instead of having the present view display the child. Here is the code I run on my "FeaturedViewController" that calls to "MainNavigationController" to add "MenuViewController" as a child of "MainNavigationController"
//ignoring compiler error as we know the parentViewController will be of type MainNavigationController at runtime.
MainNavigationController *main = self.parentViewController;
if (self.categories != nil)
main.categories = self.categories;
if (main.showingLeftPanel)
[main movePanelToOriginalPosition];
else
[main movePanelRight];
From there:
- (void)movePanelRight // to show left panel
{
UIView *childView = [self getLeftView];
//_leftPanelViewController.categories = self.categories;
[self.view sendSubviewToBack:childView];
[UIView animateWithDuration:SLIDE_TIMING delay:0 options:UIViewAnimationOptionBeginFromCurrentState
animations:^{
_centerViewController.view.frame = CGRectMake(self.view.frame.size.width - PANEL_WIDTH, 0, self.view.frame.size.width, self.view.frame.size.height);
}
completion:^(BOOL finished) {
if (finished) {
//_centerViewController.leftButton.tag = 0;
}
}];
}
- (UIView *)getLeftView
{
// init view if it doesn't already exist
if (_leftPanelViewController == nil)
{
// this is where you define the view for the left panel
_leftPanelViewController = [self.storyboard instantiateViewControllerWithIdentifier:#"MenuViewController"];
[self addChildViewController:_leftPanelViewController];
[self.view addSubview:_leftPanelViewController.view];
[_leftPanelViewController didMoveToParentViewController:self];
_leftPanelViewController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
}
_leftPanelViewController.categories = self.categories;
self.showingLeftPanel = YES;
// set up view shadows
[self showCenterViewWithShadow:YES withOffset:-2];
UIView *view = self.leftPanelViewController.view;
return view;
}
Related
I am new in iOS and I am facing a problem regarding to create slide out menu.
I searched and found the example but all are for storyboard and which I found in xib are called on AppDelegate Class.
I need to create a Slide out menu in xib which should be call after login.
Thanks in Advance!
The best example of side bar menu is SWRevealViewController. This library is easy to use and its easy to understand.
This below work for me well...try in your code.
_parentView is your custom slide out view and _rightView (UIButton )is used to dismiss these custom slide out view. you just initialize these two property
#property (strong,nonatomic) UIView *parentView;
#property (strong,nonatomic) UIButton *rightView;
-(void)slideView
{
if(![_parentView isDescendantOfView:app.navController.view])
{
[self showMenu];
}
else
{
[self hideMenu];
}
}
-(void)showMenu
{
int width=[[UIScreen mainScreen]bounds].size.width;
int height=[[UIScreen mainScreen]bounds].size.height;
_parentView =[[UIView alloc]initWithFrame:CGRectMake(0-(width-70), 0, width-70, self.navigationController.view.frame.size.height)];
[_parentView setBackgroundColor:[UIColor lightTextColor]];
[app.navController.view addSubview:_parentView];
_rightView=[[UIButton alloc]initWithFrame:CGRectMake(0,80, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height-80)];
_rightView.alpha=0.7;
[_rightView addTarget:self action:#selector(hideMenu) forControlEvents:UIControlEventTouchUpInside];
if(_parentView.frame.origin.x <0)
{
[self performSelector:#selector(showSideMenu) withObject:nil afterDelay:0.2];
}
}
-(void)showSideMenu{
if(_parentView.frame.origin.x <0)
{
[UIView animateWithDuration:0.5 animations:^{
[UIView animateWithDuration:0.7 animations:^{
[self.view addSubview:_rightView];
_rightView.backgroundColor=[UIColor blackColor];
}];
CGRect frame = _parentView.frame;
frame.origin.x =0;
_parentView.frame = frame;
CGRect rightFrame=self.view.frame;
rightFrame.origin.x=_parentView.frame.size.width;
self.view.frame=rightFrame;
CGRect fram1=app.navController.navigationBar.frame;
fram1 .origin.x =_parentView.frame.size.width;
app.navController.navigationBar.frame =fram1 ;
} completion:^(BOOL finished) {
}];
}
}
-(void)hideMenu
{
if(_parentView.frame.origin.x == 0)
{
[UIView animateWithDuration:0.3 animations:^{
CGRect frame = _parentView.frame;
frame.origin.x=-_parentView.frame.size.width;
_parentView.frame = frame;
CGRect fram=self.view.frame;
fram .origin.x=0;
self.view.frame =fram ;
CGRect fram1=app.navController.navigationBar.frame;
fram1 .origin.x =0;
app.navController.navigationBar.frame =fram1 ;
} completion:^(BOOL finished) {
[_rightView removeFromSuperview];
[_parentView removeFromSuperview];
}];
}
}
Thank you...!!!
PUSH FROM NORMAL VIEW CONTROLLER TO SW VIEW CONTROLLER
UIStoryboard*Storyboard=[AppDelegate storyBoardType];
SidebarViewController *sidebarmemu =(SidebarViewController*)[Storyboard instantiateViewControllerWithIdentifier:#"SidebarController"];
tbTBC*tabbarController=(tbTBC*)[Storyboard instantiateViewControllerWithIdentifier:#"tbTBCId"];
SWRevealViewController *revealController;
UINavigationController *frontNavigationController;
UINavigationController *rearNavigationController;
frontNavigationController =[[UINavigationController alloc]initWithRootViewController:tabbarController];
rearNavigationController =[[UINavigationController alloc]initWithRootViewController:sidebarmemu];
revealController = [[SWRevealViewController alloc] initWithRearViewController:rearNavigationController frontViewController:frontNavigationController];
revealController.delegate = self;
self.swcontroller =revealController;
self.view.window.rootViewController =self.swcontroller;
WITH THE HELP OF THIS CODE YOU CAN GET BOTH TAB BAR AS WELL AS SIDE BAR
I am in a weird scenario. I have created a nestedViewController in which clicking on a row in tableview launches a another nestedviewcontroller just below the header of the parent nestedview's section header by adjusting frames. Now, To add a different functionality to second nested view , I added a UIViewController (which has custom cells in a tableview) as childviewcontroller to it. Now , when I click on the cell of the viewController , somehow the TableView Delegate of first NestedViewController is getting called!!! However, the view that is present is the UIViewController that I added as childViewController to second NestedViewController.
The way I added UIViewController to Second NestedViewController is :
DRProductWriteRatingViewController *writeRatingVC = [[DRProductWriteRatingViewController alloc] initWithNibName:#"DRProductWriteRatingViewController" bundle:nil];
writeRatingVC.productDict = [productDict mutableCopy];
newVC = [[DRRatingNestedViewController alloc] initWithFrame:CGRectMake(0,0,320,[UIScreen mainScreen].applicationFrame.size.height- COLLAPSED_HEADER_HEIGHT*self.depth) andEntity:childEntity andListing:_listing];
newVC.category = self.category;
// self.depth = self.depth+1;
dispatch_async(dispatch_get_main_queue(), ^{
writeRatingVC.tableView.frame = CGRectMake(0,0,320,[UIScreen mainScreen].applicationFrame.size.height- COLLAPSED_HEADER_HEIGHT*self.depth-40);
[newVC.tableView removeFromSuperview];// removing tableview of nestedVC as it is irrelevant
[newVC addChildViewController:writeRatingVC];
[newVC.view addSubview:writeRatingVC.view];
[writeRatingVC didMoveToParentViewController:newVC];
});
Also the way I push second NestedViewController Over First one goes like this:
- (void)pushViewController:(UIViewController *)viewController {
//1. The current controller is going to be removed
// [self willMoveToParentViewController:nil];
[viewController willMoveToParentViewController:self];
//2. The new controller is a new child of the container
[self addChildViewController:viewController];
//3. Setup the new controller's frame depending on the animation you want to obtain
CGRect containerRect = CGRectMake(0, self.view.bounds.size.height ,
320.,
self.view.bounds.size.height - COLLAPSED_HEADER_HEIGHT*(self.depth));
viewController.view.frame = containerRect;
[self.view addSubview:viewController.view];
// viewController.view.alpha = 0;
//assume that the new view controller is positioned at the bottom of the screen
viewController.view.transform = CGAffineTransformIdentity;
// CGFloat travelDistance = self.view.bounds.size.height - COLLAPSED_HEADER_HEIGHT - NAVIGATION_BAR_HEIGHT;
CGFloat travelDistance = self.view.bounds.size.height - COLLAPSED_HEADER_HEIGHT - NAVIGATION_BAR_HEIGHT;
if(self.depth>1) {
travelDistance += NAVIGATION_BAR_HEIGHT;
}
travelDistance += NAVIGATION_BAR_HEIGHT;
if (self.depth >= 2) {
travelDistance -=NAVIGATION_BAR_HEIGHT;
}
if (self.depth == 5 ) {
travelDistance -=NAVIGATION_BAR_HEIGHT;
}
CGAffineTransform travel = CGAffineTransformMakeTranslation ( 0, -travelDistance);
[UIView animateWithDuration:1 delay:0 usingSpringWithDamping:kDamping initialSpringVelocity:kInitialSpringVelocity options:0x00 animations:^{
viewController.view.transform = travel;
viewController.view.alpha = 1;
} completion:^(BOOL finished) {
// self.view.transform = CGAffineTransformIdentity;
[viewController didMoveToParentViewController:self];
//mayanktest [self.tableView reloadData];
}];
}
The Depth here only decides the number of NestedVCs added.
First Nested VC: DRRatingNestedViewController: 0xd3a9520
Second Nested VC: DRRatingNestedViewController: 0xd0b4f50
Child View to Second Nested VC : DRProductWriteRatingViewController: 0xd0c15b0
So the tableViewDelegate with object 0xd3a9520 is called , which is my problem.
What should be the issue here?
The issue was with the childviewcontroller frame. Since the frame was smaller it was able to access the view behind. Hence,
Modifications had to be done in this:
CGRect containerRect = CGRectMake(0, self.view.bounds.size.height ,
320.,
self.view.bounds.size.height - COLLAPSED_HEADER_HEIGHT*(self.depth));
viewController.view.frame = containerRect;
[self.view addSubview:viewController.view];
I'm using the iOS 7 UIviewControllerAnimatedTransitioning protocol to present a modal ViewController with a custom animation. The animation works correctly, however, I want the newly presented ViewController to have a different status bar style than the presenting VC.
What I'm seeing is that -(UIStatusBarStyle)preferredStatusBarStyle gets called on the PRESENTING ViewController (several times in fact) and never on the newly presented ViewController. If I remove the custom animation everything with the status bar works as I'd expect.
Is there something special I need to do in my animateTransition function to update the root view controller or something? I've tried manually setting the statusBar with [UIApplication sharedApplication] setStatusBarStyle but it doesn't work (I think because I'm using the ios 7 view controller based status bar styling).
This is my code for animateTransition:
- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
UICollectionViewCell *activeCell;
if ([self.collectionView.visibleCells containsObject:self.cellForActiveIdeaVC]) {
activeCell = self.cellForActiveIdeaVC;
}
UIView *container = transitionContext.containerView;
UIViewController *fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
UIViewController *toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIView *fromView = fromVC.view;
UIView *toView = toVC.view;
CGRect beginFrame;
if (activeCell) {
beginFrame = [container convertRect:activeCell.bounds fromView:activeCell];
} else {
beginFrame = CGRectMake(container.width / 2, container.height / 2, 0, 0);
}
CGRect endFrame = [transitionContext initialFrameForViewController:fromVC];
UIView *move = nil;
if (toVC.isBeingPresented) {
toView.frame = endFrame;
move = [toView snapshotViewAfterScreenUpdates:YES];
move.frame = beginFrame;
} else {
if (activeCell) {
move = [activeCell snapshotViewAfterScreenUpdates:YES];
} else {
move = [fromView snapshotViewAfterScreenUpdates:YES];
}
move.frame = fromView.frame;
[fromView removeFromSuperview];
}
[container addSubview:move];
[UIView animateWithDuration:.5
delay:0
usingSpringWithDamping:700
initialSpringVelocity:15
options:0
animations:^{
move.frame = toVC.isBeingPresented ? endFrame : beginFrame;
}
completion:^(BOOL finished) {
[move removeFromSuperview];
if (toVC.isBeingPresented) {
toView.frame = endFrame;
[container addSubview:toView];
} else {
if (self.cellForActiveIdeaVC) {
self.cellForActiveIdeaVC = nil;
}
}
[transitionContext completeTransition:YES];
}];
}
Any pointers much appreciated!
With iOS 7 custom transitions, it's possible to present a view controller that isn't fullscreen and therefore wouldn't affect the statusbar appearance. You have to explicitly tell iOS that your custom presented view controller will, in fact, control the status bar's appearance.
UIViewController *controllerToPresent = [...]
controllerToPresent.modalPresentationStyle = UIModalPresentationStyleCustom;
controllerToPresent.modalPresentationCapturesStatusBarAppearance = YES;
[self presentViewController:controllerToPresent animated:YES completion:nil];
There's some more information here. Hope that helps!
This worked for me:
[UIView animateWithDuration:0.25
delay:0
options:UIViewAnimationOptionCurveEaseOut
animations:^{
_preferredBarStyle = UIStatusBarStyleLightContent;
[self setNeedsStatusBarAppearanceUpdate];
}];
And then you just have to return this value on the preferredStatusBarStyle method:
- (UIStatusBarStyle) preferredStatusBarStyle {
return _preferredBarStyle;
}
I hope it helps!
I'm trying to have something similar to a UINavigationController so I can customize the animations. To start, I'm just using Apple stock animations. Here's my containerViewController:
- (void)loadView {
// Set up content view
CGRect frame = [[UIScreen mainScreen] bounds];
_containerView = [[UIView alloc] initWithFrame:frame];
_containerView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
self.view = _containerView;
}
- (id)initWithInitialViewController:(UIViewController *)vc {
self = [super init];
if (self) {
_currentViewController = vc;
[self addChildViewController:_currentViewController];
[self.view addSubview:_currentViewController.view];
[self didMoveToParentViewController:self];
_subViewControllers = [[NSMutableArray alloc] initWithObjects:_currentViewController, nil];
}
return self;
}
- (void)pushChildViewController:(UIViewController *)vc animation:(UIViewAnimationOptions)animation {
vc.view.frame = _containerView.frame;
[self addChildViewController:vc];
[self transitionFromViewController:_currentViewController toViewController:vc duration:0.3 options:animation animations:^{
}completion:^(BOOL finished) {
[self.view addSubview:vc.view];
[vc didMoveToParentViewController:self];
[self.subViewControllers addObject:vc];
}];
}
- (void)popChildViewController:(UIViewController *)vc WithAnimation:(UIViewAnimationOptions)animation {
// Check that there is a view controller to pop to
if ([self.subViewControllers count] <= 0) {
return;
}
NSInteger idx = [self.subViewControllers count] - 1;
UIViewController *toViewController = [_subViewControllers objectAtIndex:idx];
[vc willMoveToParentViewController:nil];
[self transitionFromViewController:vc toViewController:toViewController duration:0.3 options:animation animations:^{
}completion:^(BOOL finished) {
[vc.view removeFromSuperview];
[vc removeFromParentViewController];
[self didMoveToParentViewController:toViewController];
[self.subViewControllers removeObjectAtIndex:idx];
}];
}
I have this ContainerViewcontroller as my rootViewController of the window. I can add my initial viewController and push a view controller. When I try to pop though, I get
ContainerViewController[65240:c07] Unbalanced calls to begin/end appearance transitions for <SecondViewController: 0x8072130>.
I'm wondering what I am doing wrong. I figured my initialViewController is still underneath the secondViewController. Any thoughts? Thanks!
I don't know if this is what's causing your problem, but shouldn't this:
[self didMoveToParentViewController:toViewController];
be:
[toViewController didMoveToParentViewController:self];
Also, I'm not sure what you're doing with the subViewControllers array. It seems to be a duplication of the childViewControllers array that is already a property of a UIViewController.
One other thing I'm not sure is right. In your pop method your toViewController is the last controller in the _subViewControllers array. Don't you want it to be the second to last? Shouldn't the last be the one you're popping? You're popping vc, which is a controller you're passing in to the method, I don't understand that.
This is the way I've made a navigation like controller. In its containment behavior, it acts like a navigation controller, but without a navigation bar, and allows for different transition animations:
#implementation ViewController
-(id)initWithRootViewController:(UIViewController *) rootVC {
if (self = [super init]) {
[self addChildViewController:rootVC];
rootVC.view.frame = self.view.bounds;
[self.view addSubview:rootVC.view];
}
return self;
}
-(void)pushViewController:(UIViewController *) vc animation:(UIViewAnimationOptions)animation {
vc.view.frame = self.view.bounds;
[self addChildViewController:vc];
[self transitionFromViewController:self.childViewControllers[self.childViewControllers.count -2] toViewController:vc duration:1 options:animation animations:nil
completion:^(BOOL finished) {
[vc didMoveToParentViewController:self];
NSLog(#"%#",self.childViewControllers);
}];
}
-(void)popViewControllerAnimation:(UIViewAnimationOptions)animation {
[self transitionFromViewController:self.childViewControllers.lastObject toViewController:self.childViewControllers[self.childViewControllers.count -2] duration:1 options:animation animations:nil
completion:^(BOOL finished) {
[self.childViewControllers.lastObject removeFromParentViewController];
NSLog(#"%#",self.childViewControllers);
}];
}
-(void)popToRootControllerAnimation:(UIViewAnimationOptions)animation {
[self transitionFromViewController:self.childViewControllers.lastObject toViewController:self.childViewControllers[0] duration:1 options:animation animations:nil
completion:^(BOOL finished) {
for (int i = self.childViewControllers.count -1; i>0; i--) {
[self.childViewControllers[i] removeFromParentViewController];
}
NSLog(#"%#",self.childViewControllers);
}];
}
After Edit: I was able to duplicate the back button function with this controller by adding a navigation bar to all my controllers in IB (including in the one that is the custom container controller). I added a bar button to any controllers that will be pushed, and set their titles to nil (I got some glitches if I left the title as "item"). Deleting that title makes the button disappear (in IB) but you can still make connections to it in the scene list. I added an IBOutlet to it, and added this code to get the function I wanted:
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
if (self.isMovingToParentViewController) {
self.backButton.title = [self.parentViewController.childViewControllers[self.parentViewController.childViewControllers.count -2] navigationItem].title;
}else{
self.backButton.title = [self.parentViewController.childViewControllers[self.parentViewController.childViewControllers.count -3] title];
}
}
I've shown two different ways that worked to access a title -- in IB you can set a title for the controller which I used in the else clause, or you can use the navigationItem title as I did in the if part of the clause. The "-3" in the else clause is necessary because at the time viewWillAppear is called, the controller that is being popped is still in the childViewControllers array.
addChildViewController should be called first
For adding / removing, you can refer to this great category and have no worry when to call it:
UIViewController + Container
- (void)containerAddChildViewController:(UIViewController *)childViewController {
[self addChildViewController:childViewController];
[self.view addSubview:childViewController.view];
[childViewController didMoveToParentViewController:self];
}
- (void)containerRemoveChildViewController:(UIViewController *)childViewController {
[childViewController willMoveToParentViewController:nil];
[childViewController.view removeFromSuperview];
[childViewController removeFromParentViewController];
}
In addition to rdelmar's answer you should not be calling addView/removeFromSuperview transitionFromViewController does this for you, from the documentation:
This method adds the second view controller’s view to the view
hierarchy and then performs the animations defined in your animations
block. After the animation completes, it removes the first view
controller’s view from the view hierarchy.
I have a requirement to show a status bar at certain times at the bottom of my application. I can easily put this at the bottom of my application's main view, but whenever I push a view controller on top of this (either modally or not) it hides this status bar.
Is there any way I can add a status bar like this, and have it be outside the bounds of my application itself? Ideally I'd like this to work like the call-in-progress status bar on the iPhone - when this bar appears, the app is pushed down, and a call to [[UIScreen mainScreen] applicationFrame] returns the correct size (i.e. it accounts for the presence of this status bar when calculating the height available for the app).
I wanted to do this, too, so I tried View Controller Containment. I'm still trying it out, so I'm not willing to give this a ringing endorsement, but it might be something you'd want to try playing around with yourself if you're in iOS5. But it appears to give you a status bar that will appear or disappear from the bottom of the screen.
This is a view controller that will open another view controller, but if there is status text to show, it pops up from the bottom of the screen and stays there until you get rid of it. I've only done a little testing so far, but it looks like this handles pushViewController/popViewController, but maybe not modal views.
My header looks like:
// StatusBarViewController.h
//
// Created by Robert Ryan on 7/8/12.
#import <UIKit/UIKit.h>
#interface StatusBarViewController : UIViewController
#property (strong, nonatomic) UIViewController *appController;
- (void)setStatus:(NSString *)text;
#end
My implementation file (this is ARC) looks like:
// StatusBarViewController.m
//
// Created by Robert Ryan on 7/8/12.
#import "StatusBarViewController.h"
#interface StatusBarViewController ()
{
BOOL _statusHidden;
UIView *_appView;
UILabel *_statusLabel;
}
#end
#implementation StatusBarViewController
#synthesize appController = _appController;
- (void)dealloc
{
_appView = nil;
_statusLabel = nil;
[self setAppController:nil]; // usually I don't like setters in dealloc, but this does some special stuff
}
- (void)createControlsWithStatusHidden
{
// create default app view that takes up whole screen
CGRect frame = self.view.frame;
frame.origin = CGPointMake(0.0, 0.0);
_appView = [[UIView alloc] initWithFrame:frame];
_appView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
_appView.clipsToBounds = YES;
[self.view addSubview:_appView];
// create status label that is just off screen below the app view
_statusLabel = [[UILabel alloc] init];
_statusLabel.font = [UIFont fontWithName:#"Helvetica-Bold" size:12.0];
_statusLabel.backgroundColor = [UIColor darkGrayColor];
_statusLabel.textColor = [UIColor whiteColor];
CGSize size = [#"Hey!" sizeWithFont:_statusLabel.font]; // test size of box with random text
_statusLabel.frame = CGRectMake(0.0, frame.size.height, frame.size.width, size.height);
_statusLabel.textAlignment = UITextAlignmentCenter;
_statusLabel.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth;
[self.view addSubview:_statusLabel];
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self createControlsWithStatusHidden];
_statusHidden = YES;
// I'm instantiating from storyboard. If you're using NIBs, just create your controller controller using initWithNib and then set our appController accordingly.
self.appController = [self.storyboard instantiateViewControllerWithIdentifier:#"MainNavigator"];
}
- (void)setAppController:(UIViewController *)controller
{
if (controller)
{
controller.view.frame = CGRectMake(0.0, 0.0, _appView.frame.size.width, _appView.frame.size.height);
[self addChildViewController:controller];
[controller didMoveToParentViewController:self];
if (self.appController)
{
// if we have both a new controller and and old one, then let's transition, cleaning up the old one upon completion
[self transitionFromViewController:self.appController
toViewController:controller
duration:0.5
options:UIViewAnimationOptionTransitionCrossDissolve | UIViewAnimationOptionCurveEaseInOut
animations:nil
completion:^(BOOL finished){
if (self.appController)
{
[self.appController willMoveToParentViewController:nil];
[self.appController removeFromParentViewController];
}
}];
}
else
{
// if we have no previous controller (i.e. this is our first rodeo), then just add it to the view
[_appView addSubview:controller.view];
}
}
else
{
// no new controller, so we're just removing any old on if it was there
if (self.appController)
{
// if there was an old controller, remove it's view, and remove it from the view controller hierarchy
[self.appController.view removeFromSuperview];
[self.appController willMoveToParentViewController:nil];
[self.appController removeFromParentViewController];
}
}
_appController = controller;
}
- (void)hideStatusWithCompletion:(void (^)(BOOL finished))completion
{
[UIView animateWithDuration:0.25
animations:^{
CGRect labelFrame = _statusLabel.frame;
labelFrame.origin.y += labelFrame.size.height;
_statusLabel.frame = labelFrame;
CGRect appFrame = _appView.frame;
appFrame.size.height += labelFrame.size.height;
_appView.frame = appFrame;
}
completion:completion];
}
- (void)unhideStatusWithCompletion:(void (^)(BOOL finished))completion
{
[UIView animateWithDuration:0.25
animations:^{
CGRect labelFrame = _statusLabel.frame;
labelFrame.origin.y -= labelFrame.size.height;
_statusLabel.frame = labelFrame;
CGRect appFrame = _appView.frame;
appFrame.size.height -= labelFrame.size.height;
_appView.frame = appFrame;
}
completion:completion];
}
- (void)setStatus:(NSString *)text
{
BOOL hasText = (text && [text length] > 0);
if (hasText)
{
if (!_statusHidden)
{
// if we have text, but status is already shown, then hide it and unhide it with new value
[self hideStatusWithCompletion:^(BOOL finished){
_statusLabel.text = text;
[self unhideStatusWithCompletion:nil];
}];
}
else
{
// if we have text, but no status is currently shown, then just unhide it
_statusLabel.text = text;
[self unhideStatusWithCompletion:nil];
}
_statusHidden = NO;
}
else
{
if (!_statusHidden)
{
// if we don't have text, but status bar is shown, then just hide it
[self hideStatusWithCompletion:^(BOOL finished){
_statusLabel.text = text;
}];
_statusHidden = YES;
}
}
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#end
And then, any view controller that wants to update the status message would use a method kind of like:
- (void)setStatus:(NSString *)text
{
UIViewController *controller = [UIApplication sharedApplication].delegate.window.rootViewController;
if ([controller isKindOfClass:[StatusBarViewController class]])
{
[(StatusBarViewController *)controller setStatus:text];
}
}