I would like to enable Popover controller, right on the launch of my application in the portrait mode. Kindly give me some points to note down, I'm a newbie.
Thanks,
After playing a lot with my code, i found this...
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
if (masterPopoverController != nil) {
[masterPopoverController presentPopoverFromRect:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUnknown animated:YES];
}
}
Related
I have main dashboard (UITableViewController) and once i sign in i need to show this page with a welcome message which am showing using a UIViewController.
How can i show this popup from my ViewDidAppear() method ?
Am using following code and its not working
-(void)viewDidAppear:(BOOL)animated{
popupObj= [self.storyboard instantiateViewControllerWithIdentifier:#"popup"];
[popupObj setModalPresentationStyle:UIModalPresentationCurrentContext];
}
please help me..
i saw couple of stackoverflow links
Update
When i change my code to this one
-(void)viewDidAppear:(BOOL)animated{
popupObj= [self.storyboard instantiateViewControllerWithIdentifier:#"popup"];
// [popupObj setModalPresentationStyle:UIModalPresentationCurrentContext];
popupObj.modalPresentationStyle = UIModalPresentationOverCurrentContext;
popupObj.modalTransitionStyle = UIModalPresentationPopover;
[self presentViewController:popupObj animated:YES completion:nil];
}
Now i can see my UIViewController coming as popup but now UIViewController
coming as full screen view.
But i need only this frame (320 , 320)
popupObj= [self.storyboard instantiateViewControllerWithIdentifier:#"popup"];
popupObj.view.frame = CGRectMake(20, 200, 280, 168);
[self.view addSubview:popupObj.view];
[self addChildViewController:popupObj];
You can add UIViewController as subview and set it's frame so it will look like popup.
Hope this will help you.
I have two way,maybe not good, but work at most of time.
First,when the second view controller appear, show a screen shot of the first view controller. like this:
- (void)setBackGround {
UIGraphicsBeginImageContextWithOptions(self.view.frame.size, NO, [UIScreen mainScreen].scale);
[self.presentingViewController.view drawViewHierarchyInRect:self.view.bounds afterScreenUpdates:NO];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
self.view.layer.contents = (__bridge id)(image.CGImage);
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
if (!_isShown) {
_isShown = YES;
[self setBackGround];
}
}
Do't forget set "_isShown = NO" when init.
Second: you can only init a view, and show it on a view controller with animation. code at ：http://blog.moemiku.com/?p=101
I have update a example on the blog. Direct download url
Your code creates the view controller and sets its presentation style, but doesn't actually present it. For that to happen you need this line after the two you have right now:
[self presentViewController:popupObj animated:true completion:nil];
Please set navigation controller on your rootviewcontroller :
-(void)viewDidAppear:(BOOL)animated
{
popupObj= [self.storyboard instantiateViewControllerWithIdentifier:#"popup"];
[self.navigationController presentViewController:popupObj animated:YES completion:nil];
}
Or
-(void)viewDidAppear:(BOOL)animated
{
popupObj= [self.storyboard instantiateViewControllerWithIdentifier:#"popup"];
[self.view addSubview:popupObj.view];
}
in my UITableViewControllers I have added navigation bars but the problem is that the Title of the navigation bar intersects with the status bar. Normally I would do "positionForBar" and return UIBarPositioningTopAttached but that only works with UIViewControllers. Thus, I used the "prefersStatusBarHidden" method an return YES. Obviously, this bears a cost to the user since they can't view the time and battery life while they're on those screens while using the app. So is there a way to keep the title navigation bar and the status bar from not overlapping, kinda like in iOS 6?
Here's what i'm talking about:
it doesn't look very clean and i'm trying to fix it
In storyboard click on your UITableViewController then simply click on edit -> embed -> navigation controller. You don't need to use it to navigate anywhere but it will setup your title bar correctly for you.
Try with the code
self.edgesForExtendedLayout = UIRectEdgeNone;
I had the same issue. this fixed it:
credit to: malcolmhall
Its just pushing the nav down but works
// in the .h
#property (strong) UINavigationBar* navigationBar;
//in the .m
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationItem.title = #"Title";
self.navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectZero];
[self.view addSubview:_navigationBar];
[self.navigationBar pushNavigationItem:self.navigationItem animated:NO];
}
-(void)layoutNavigationBar{
self.navigationBar.frame = CGRectMake(0, self.tableView.contentOffset.y, self.tableView.frame.size.width, self.topLayoutGuide.length + 44);
self.tableView.contentInset = UIEdgeInsetsMake(self.navigationBar.frame.size.height, 0, 0, 0);
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
//no need to call super
[self layoutNavigationBar];
}
-(void)viewDidLayoutSubviews{
[super viewDidLayoutSubviews];
[self layoutNavigationBar];
}
I'm writing an iPhone app and I start with a main view and when I click a button it switches to my second view using this code...
- (IBAction)addNewCourse
{
AddCourses *addCourseController = [[AddCourses alloc] initWithNibName:#"AddCourses" bundle:nil];
[self presentModalViewController:addCourseController animated:YES];
}
Now I am having problems switching BACK to the original view. I use this code...
- (IBAction) back
{
[self.parentViewController dismissViewControllerAnimated:YES completion:nil];
}
but it doesn't seem to work. Any help would be greatly appreciated. Thanks
Try this code:
[self dismissViewControllerAnimated:YES completion:nil];
I am trying to debug a really weird issue in the following code:
if(condition1) {
ImageViewController* imageViewer = [[ImageViewController alloc] initWithImageData:tappedItem];
[self presentViewController:imageViewer animated:YES completion:^{
[imageViewer loadImage];
}];
}
else if(condition2) {
DocumentViewController* docViewer = [[DocumentViewController alloc] init];
[self presentViewController:docViewer animated:YES completion:nil];
}
In other words, depending on the state of condition1 and condition2, one of two subclasses of UIViewController will be displayed modally to the user.
In the second case all is well, but in the first the view controller is not presented with the usual animation that shows it sliding in from the bottom of the screen. Instead, after a brief delay, it just shows up all of a sudden, covering the entire screen. Another oddity is that in the dismissal animation, the image view inside the view controller is transparent.
Removing the completion block has no effect. Replacing my view controller with an instance of UIViewController also has no effect, other than demonstrating that for some reason, animations don't work for UIViewController instances either.
Thinking that maybe I did something wrong in viewDidLoad etc, I tried commenting out the view load/appear methods but to no avail.
Pushing the view controller onto the nav stack is not an option because the app has a tab bar and I don't want to be visible.
update
Replacing my instance of ImageViewController with a DocumentViewController does result in an animation. The question now becomes: what could I have done in ImageViewController to mess up the animation?
I've found a solution but I still have no idea what the real cause was.
The fix was to set a background color for the view of the UIViewController being displayed modally in its viewDidload method e.g.
self.view.backgroundColor = [UIColor grayColor];
If I ever figure out what really happened, I will post here.
How about presenting the view controller on the tab bar controller:
if(condition1) {
ImageViewController* imageViewer = [[ImageViewController alloc] initWithImageData:tappedItem];
[self.tabBarController presentViewController:imageViewer animated:YES completion:^{
[imageViewer loadImage];
}];
}
else if(condition2) {
DocumentViewController* docViewer = [[DocumentViewController alloc] init];
[self.tabBarController presentViewController:docViewer animated:YES completion:nil];
}
It happened to me as well.. changing the background colour didn't really help.
I did the following - it turns up to be quite nice:
-(void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:NO];
self.view.userInteractionEnabled = FALSE;
self.view.hidden = TRUE;
self.navigationController.navigationBar.alpha = 0;
}
-(void) viewDidAppear:(BOOL)animated
{
[super viewDidAppear:NO];
float width = self.view.frame.size.width;
float height = self.view.frame.size.height;
self.view.frame = CGRectMake(0, height, width, height);
self.view.hidden = FALSE;
[UIView animateWithDuration:0.7f animations:^{
self.view.frame = CGRectMake(0, 0, width, height);
self.navigationController.navigationBar.alpha = 1;
} completion:^(BOOL finished){
self.view.userInteractionEnabled = TRUE;
}];
}
Setting the background color works for me in iOS 8.
Also uncheck the opaque setting in the Interface Builder works!
I have another orientation problem. But this one is very tricky.
My RootViewController is a normal NavigationController.
self.window.rootViewController = _naviController;
which has another ViewController inside, lets call it VC1.
VC1 has some buttons and labels. Its like an overview with folders.
If I press a button I come to the next ViewController with 3 ViewController (Page) and another bunch of buttons (like inside a folder looking at the pictures/thumbnails inside):
Archiv *archiv = [[Archiv alloc] init];
[self.navigationController pushViewController:archiv animated:YES];
[archiv release];
in loadView:
firstPage = [[Page alloc] initViewWithFrame:CGRectMake(0, 0, 768, 960)];
[firstPage setRootViewController:self];
secondPage = [[Page alloc] initViewWithFrame:CGRectMake(0, -960, 768, 960)];
[secondPage setRootViewController:self];
thirdPage = [[Page alloc] initViewWithFrame:CGRectMake(0, 960, 768, 960)];
[thirdPage setRootViewController:self];
If I now click again on a button the active Page push my third ViewController (image with resizing, dragging...):
Picture *pic = [[Picture alloc] initWithPicURLString:urlString];
[rootViewController.navigationController pushViewController:pic animated:YES];
[pic release];
With the BackButton of the NavigationController I can always come back to the previous view.
Some more informations:
Every ViewController supports all orientations
Every ViewController implements - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation with return YES;
Every ViewControler calls the [super init] in their init-methode
I already read Apple's Q&A: Why won't my UIViewController rotate with the device
Now the tricky problem:
If I switch from 2nd VC to the 3rd VC, change the orientation there from portrait to landscape and press the BackButton everything is working (shouldAutorotateToInterfaceOrientation is calling, frame size and origins changing ...).
BUT if I do it the other way around, I am in landscape mode, switch from 2nd VC to 3rd VC, rotate to portrait and come back to 2nd VC with BackButton, the status- and controllerBar are at the top but the shouldAutorotateToInterfaceOrientation wasn't called.
Please help me. $h#rky
Try this, it works for me:
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self shouldAutorotateToInterfaceOrientation:[[UIApplication sharedApplication] statusBarOrientation] ];
}
Today I got the idea that solved the problem without knowing the cause.
In my third VC I just created a pointer to the 2nd View and called the shouldAutorotateToInterfaceOrientation myself.
But the point is still the same: Why isn't shouldAutorotateToInterfaceOrientation not calling in the described situation?
Kind regards. $h#rky
shouldAutorotateToInterfaceOrientation only called when user rotate, so when you from landscape to portrait or otherwise then view controller still landscape, so this solve problem, you have to hack code, it's mean when you push to view controller from landscape to portrait presentViewController example:
ListCurrentViewController *list = [self.storyboard
instantiateViewControllerWithIdentifier:#"ListCurrentViewController"];
[self.navigationController presentViewController:list animated:NO completion:Nil];
[list dismissViewControllerAnimated:NO completion:Nil];
[self.navigationController pushViewController:list animated:YES];
in ListViewController function called:
(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation // iOS 6 autorotation fix { return UIInterfaceOrientationPortrait; }
and you have to create category for UINavigationController
(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
return [self.visibleViewController preferredInterfaceOrientationForPresentation];
}
I hope this solve will help you.