I have a container view controller that consists of a navigation view at top, and a content view for the remainder of the screen. The navigation menu consists of several buttons, some of which present a popover with UITableView for secondary navigation. This all worked until I assigned a child view controller and set it's view as subview of the content view. Now, the popover appears, but has nothing inside it (no tableview, just black).
Why is this?
Here's the code I added for the child vc in container view:
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
ContentWebViewController *initialVC = [[ContentWebViewController alloc] init];
[self addChildViewController:initialVC];
initialVC.view.frame = self.view.bounds;
[self.containerView addSubview:initialVC.view];
self.currentController = initial;
}
See the screenshot below. I added a vc with a simple webview showing google (just as a placeholder for now). The popover was working fine before I assigned the child VC.
Maybe it will help other in other cases -
If you are using size classes (probably you are since you are developing this to iPad) -
Design your popover view controller in Any-Any size and it should be OK - after that you can return to your wanted size.
(You can also uninstall the size classes of any object in that view controller instead of redesign the VC)
I somehow (don't ask me how) changed the class that my table view controller was inheriting from. It should have been (obviously) UITableViewController, but was UITableViewController, so initWithStyle was not being called....
Related
I have a UINavigationController, containing a UIViewController that is parent to two UITableViewController controllers.
When the user taps on a segmented control in the UIToolbar of the navigation controller, the current child table controller is swapped out with the new one. This includes removing the old controller from the parent hierarchy and removing its view as a subview of the parent view controller.
The first view controller that is displayed when the navigation view controller first presents it has its contentInset correctly configured by automaticallyAdjustsScrollViewInsets, however, when I pull that one out and insert the view from the second table view controller, that does not.
Furthermore, if I rotate the device (Which shrinks the UINavigationBar) and then swap back to the first view controller, its contentInset is now incorrect and it doesn't scroll properly. The second controller, however, does have its contentInset property properly set as a result of the device rotation.
Is there a way to manually force a UIViewController to redo its automaticallyAdjustsScrollViewInsets operation when I need it?
It's not an absolutely amazing one, but I found a solution that works.
Inserting a new child view controller isn't enough to trigger UINavigationController to automatically work out the appropriate contentInset values for any scroll views in the new child. BUT! You can force it to perform that calculation by doing something that would have required it anyway. For example, hiding and showing the navigation bar or toolbar.
- (void)insertViewController:(UIViewController *)viewController
{
// Add the view to our view
viewController.view.frame = self.view.bounds;
[self.view addSubview:viewController.view];
// Add the new controller as a child
[self addChildViewController:viewController];
[viewController didMoveToParentViewController:self];
// Show and hide the toolbar to force the content inset calculation
self.navigationController.toolbarHidden = YES;
self.navigationController.toolbarHidden = NO;
}
I've tested it, and there appear to be no visual glitches by rapidly hiding either the navigation bar or toolbar, so this solution seems to be acceptable.
I have a UINavigationController with a UIViewController set as it's rootController, it contains a background on its UIView using an image set just under the navBar. I then push onto the navigation controller a new UIViewController and when the back button is pushed, the previous controller looks different. Using the visual debugger I can see that the self.view has moved entirely down below the navBar where previously it was at the top. I have no idea and been racking my brains as to why this might be happening
-(void)pushIPhoneMessagingContactsController:(MessageContactsViewController *)contactsController{
self.selectorView.hidden = YES;
[self.navigationController pushViewController:contactsController animated:YES];
}
On the RootViewController (iPhoneMessagingNotificationsController)
-(void)viewWillAppear:(BOOL)animated{
self.selectorView.hidden = NO;
[[[self navigationItem] leftBarButtonItem] setTintColor:[UIColor blackColor]];
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];
if ([_displayType intValue] == MESSAGES_SHOWING) {
[self.notificationsViewController.view removeFromSuperview];
[self.contentView addSubview:_messagesViewController.view];
} else {
[self.messagesViewController.view removeFromSuperview];
[self.contentView addSubview:_notificationsViewController.view];
}
}
It seems the offending line was in the viewWillAppear method of the pushed UIViewController
self.navigationController.navigationBar.translucent = YES;
Somewhere else this navigationBar gets set as translucent:
[self.navigationController.navigationBar setBackgroundImage:[UIImage new]
forBarMetrics:UIBarMetricsDefault];
self.navigationController.navigationBar.shadowImage = [UIImage new];
self.navigationController.navigationBar.translucent = YES;
and to make it solid colour again:
self.navigationController.navigationBar.shadowImage = nil;
self.navigationController.navigationBar.translucent = NO;
but this code seems to mess with the layout so perhaps there is another way to change the opacity of the navBar and statusBar without affecting the layout?
What you're currently trying to do is hide or show a selectorView which really only should appear for one specific view controller.
Here's an encapsulated way to solve this that makes your selectorView a part of the root view controller, removing the connection from other view controllers. They no longer have to know about it or hide it.
Add your selectorView to your rootViewController's navigation bar titleView. (You can do this in code, or drop it in Storyboard and add an IBOutlet for it.)
self.navigationItem.titleView = selectorView;
Now when you push another view controller, its title will replace your rootViewController's selectorView title (view). Your other view controllers don't need to know anything about that view.
This is a good design approach in general. Anytime you have a control that should only appear on one view controller's navigation bar, you want to make it a part of that view controller's navigationItem (titleView, or left/right bar button items.) iOS will display the control when it presents that view controller, and hide the control when that view controller is no longer the top view controller in the navigation controller stack.
As for the 64-pixel height issue, it's likely related to some complexity in the rootViewController hierarchy that shouldn't be there.
In iOS 7/8, a view's content, by default, appears under a translucent navigation bar. Apple freely managed this for you, by insetting the first view of the view hierarchy.
From your code, it appears that you're trying to "hide" or "show" the (un)selected viewController's view.
Each view controller should have a view it controls. A view controller shouldn't be trying to control other view controller's views, or adding other view controller's views to its own view hierarchy.
Here's Apple's recommended way to approach this. Use a containerView in your rootViewController. The whole purpose of a container view is to encapsulate a view controller within a view. As your selectorView changes which view to show, you have your container view transition from one view controller to the other. (If you're not familiar with how to do that, check out this answer.)
Pin the containerView to the rootViewController's view, so Auto Layout can size it for you.
Your view hierarchy now looks like view -> containerView, instead of view -> hidden view of unselected view controller, shown view of selected view controller. Apple can adjust the first view's inset, and nothing gets incorrectly offset (by the height of the navigation control).
Update:
This question talks about scrollViewInsets and how they can be set on a view-controller-by-view-controller basis. If you do have a view controller, and you don't want its content to appear under a bar, uncheck that box.
But the best way to handle this is to "standardize" your UI, so it isn't varying from view to view. Either make the bar always be translucent, or not always be translucent. This makes transitions less "jarring" for the users.
I'm trying to add this custom control below my tableview in a TableViewController:
https://github.com/zogieosagie/RMEIdeasPullToSortControl
In the example the creator gives, the control is implemented using a ViewController and an added tableview, but I want to use it in a TableViewController. I have created and initialized it as shown in the example but I cannot get it to show up behind the table. Any ideas?
Here is a screenshot of the control above my tableview: https://www.dropbox.com/s/ojfpacxelcy9cqm/Photo%20May%2028%2C%208%2057%2035%20PM.png
Here is my code in the viewDidLoad method:
[self.tableView setBackgroundColor:[UIColor clearColor]];
self.rmeideasPullDownControl = [[RMEIdeasPullDownControl alloc] initWithDataSource:self delegate:self clientScrollView:self.tableView];
self.sortTitlesArray = [[NSArray alloc] initWithObjects:#"Listed from A - Z", #"Listed from Z - A", #"Brand value: HIGHEST - LOWEST", #"Brand value: LOWEST - HIGHEST", #"Founded: OLDEST - NEWEST", #"Founded: NEWEST - OLDEST", nil];
CGRect originalFrame = self.rmeideasPullDownControl.frame;
self.rmeideasPullDownControl.frame = CGRectMake(0.0, 45.0, originalFrame.size.width, originalFrame.size.height);
//It is recommended that the control is placed behind the client scrollView. Remember to make its background transparent.
//[self.view insertSubview:self.rmeideasPullDownControl belowSubview:self.tableView];
[self.tableView addSubview:self.rmeideasPullDownControl];
[self.tableView sendSubviewToBack:self.rmeideasPullDownControl];
Table view controllers do not lend themselves to managing anything other than a table view. In a table view controller the content view of the view controller is the table view.
You should not try to add other views as subviews of a table view.
Those 2 things combined mean that you can't do what you are trying to do.
Instead, you should create a regular UIViewController. In your storyboard, add a container view to the view controller's content view. Create a UITableViewController as a separate scene, and then control-drag from the container view onto the table view controller. That will set up an embed segue, so your table view controller becomes a child view of the regular view controller. Now you can do whatever you want to the main view controller's content view, including adding other views behind the table view.
Do you mean that you are using a Table View Controller on the storyboard? Or do you mean that your backing code is a subclass of UITableViewController?
I haven't used this project before but I'm guessing you are using a Table View Controller on the storyboard, in which case there is no backing view for the RMEIdeasPulldownControl to attach to (the top-level view is a UITableViewController). If you look in the example it needs to be attached to a scrollview (like a table view) but it needs to be inserted into a view (like a UIView)
If you meant the second one then I'm not sure, UITableViewControllers are subclassed from UIViewControllers and are really very similar, so I can't imagine any trouble arising from that.
It isn't possible directly, but you can create UIViewControllerClass with relevant storyboard UIViewController
add a MyUIView in hierarchy then UITableView next to MyUIView
attach datasource and delegates for UITableView and use MyUIView as per your requirement.
I have presented a tableview controller on a view controller.That tableview comes as full screen on view controller but I do not want to present the tableview on full screen.Is there any way to manage the size of presented vie controller. And the second problem is that i want to present a vie controller which have some label , some text boxes and a table view. Please help
IF you are using iphone device then the viewcontroller will occupy
the full screen .
If the device is iPad,then u can use modalPresentStyle.
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:yourVC];
navController.modalPresentationStyle = UIModalPresentationPageSheet;
[self presentViewController:navController animated:YES completion:nil];
For iPhone ,add the views like UILabel,UITableview to the mainView and present it.
The UITableViewController is used when the table view is the main view of the controller.
In your case it seems more appropriate to use a normal (subclass of) UIViewController and add a UITableView as one of its sub views.
Then you can resize it as you prefer and add other elements (labels...) as additional subviews.
Usually in this configuration you may want to set the view controller as the delegate and dataSource of the table view.
Does this answer also your first question?
You could not change the size of the presented view controller. Another way to do it is by adding it as childViewController by:
[self.view addSubview:tableViewController.view];
[self addChildViewController:tableView];
Then you can change the size of the tableViewController as you wish.
Since there is no complete, definitive answer to this common recurring question, I'll ask and answer it here.
Often we need to present a UIViewController such that it doesn't cover full screen, as in the picture below.
Apple provides several similar UIViewController, such as UIAlertView, Twitter or Facebook share view controller, etc..
How can we achieve this effect for a custom controller?
NOTE : This solution is broken in iOS 8. I will post new solution ASAP.
I am going to answer here using storyboard but it is also possible without storyboard.
Init: Create two UIViewController in storyboard.
lets say FirstViewController which is normal and SecondViewController which will be the popup.
Modal Segue: Put UIButton in FirstViewController and create a segue on this UIButton to SecondViewController as modal segue.
Make Transparent: Now select UIView (UIView Which is created by default with UIViewController) of SecondViewController and change its background color to clear color.
Make background Dim: Add an UIImageView in SecondViewController which covers whole screen and sets its image to some dimmed semi transparent image. You can get a sample from here : UIAlertView Background Image
Display Design: Now add an UIView and make any kind of design you want to show. Here is a screenshot of my storyboard
Here I have add segue on login button which open SecondViewController as popup to ask username and password
Important: Now that main step. We want that SecondViewController doesn't hide FirstViewController completely. We have set clear color but this is not enough. By default it adds black behind model presentation so we have to add one line of code in viewDidLoad of FirstViewController. You can add it at another place also but it should run before segue.
[self setModalPresentationStyle:UIModalPresentationCurrentContext];
Dismiss: When to dismiss depends on your use case. This is a modal presentation so to dismiss we do what we do for modal presentation:
[self dismissViewControllerAnimated:YES completion:Nil];
Thats all.....
Any kind of suggestion and comment are welcome.
Demo :
You can get demo source project from Here : Popup Demo
NEW : Someone have done very nice job on this concept : MZFormSheetController
New : I found one more code to get this kind of function : KLCPopup
iOS 8 Update : I made this method to work with both iOS 7 and iOS 8
+ (void)setPresentationStyleForSelfController:(UIViewController *)selfController presentingController:(UIViewController *)presentingController
{
if (iOSVersion >= 8.0)
{
presentingController.providesPresentationContextTransitionStyle = YES;
presentingController.definesPresentationContext = YES;
[presentingController setModalPresentationStyle:UIModalPresentationOverCurrentContext];
}
else
{
[selfController setModalPresentationStyle:UIModalPresentationCurrentContext];
[selfController.navigationController setModalPresentationStyle:UIModalPresentationCurrentContext];
}
}
Can use this method inside prepareForSegue deligate like this
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
PopUpViewController *popup = segue.destinationViewController;
[self setPresentationStyleForSelfController:self presentingController:popup]
}
Modal Popups in Interface Builder (Storyboards)
Step 1
On the ViewController you want as your modal popup, make the background color of the root UIView clear.
Tip: Do not use the root UIView as your popup. Add a new UIView that is smaller to be your popup.
Step 2
Create a Segue to the ViewController that has your popup. Select "Present Modally".
Two Methods To Create Popup From Here
Method One - Using the Segue
Select the Segue and change Presentation to "Over Current Context":
Method Two - Using the View Controller
Select the ViewController Scene that is your popup. In Attributes Inspector, under View Controller section, set Presentation to "Over Current Context":
Either method will work. That should do it!
You can do this in Interface Builder.
For the view you wish to present modally set its outermost view background to transparent
Control + click and drag from the host view controller to the modal view controller
Select present modally
Click on the newly created segue and in the Attribute Inspector (on the right) set "Presentation" to "Over Current Context"
Feel free to use my form sheet controller MZFormSheetControllerfor iPhone, in example project there are many examples on how to present modal view controller which will not cover full window and has many presentation/transition styles.
You can also try newest version of MZFormSheetController which is called MZFormSheetPresentationController and have a lot of more features.
You can use EzPopup (https://github.com/huynguyencong/EzPopup), it is a Swift pod and very easy to use:
// init YourViewController
let contentVC = ...
// Init popup view controller with content is your content view controller
let popupVC = PopupViewController(contentController: contentVC, popupWidth: 100, popupHeight: 200)
// show it by call present(_ , animated:) method from a current UIViewController
present(popupVC, animated: true)
Imao put UIImageView on background is not the best idea . In my case i added on controller view other 2 views . First view has [UIColor clearColor] on background, second - color which u want to be transparent (grey in my case).Note that order is important.Then for second view set alpha 0.5(alpha >=0 <=1).Added this to lines in prepareForSegue
infoVC.providesPresentationContextTransitionStyle = YES;
infoVC.definesPresentationContext = YES;
And thats all.
Swift 4:
To add an overlay, or the popup view
You can also use the Container View with which you get a free View Controller ( you get the Container View from the usual object palette/library)
Steps:
Have a View (ViewForContainer in the pic) that holds this Container View, to dim it when the contents of Container View are displayed. Connect the outlet inside the first View Controller
Hide this View when 1st VC loads
Unhide when Button is clicked
To dim this View when the Container View content is displayed, set the Views Background to Black and opacity to 30%
You will get this effect when you click on the Button
You can do this to add any other subview to the view controller.
First set the status bar to None for the ViewController which you want to add as subview so that you can resize to whatever you want. Then create a button in Present View controller and a method for button click. In the method:
- (IBAction)btnLogin:(id)sender {
SubView *sub = [[SubView alloc] initWithNibName:#"SubView" bundle:nil];
sub.view.frame = CGRectMake(20, 100, sub.view.frame.size.width, sub.view.frame.size.height);
[self.view addSubview:sub.view];
}
Hope this helps, feel free to ask if any queries...