View appears with modal view animation instead of show (push) animation - ios

I've recently updated my app from iOS 8.3 to iOS 9.
After fixing the various errors with the code, I managed to compile the app and run it, when I noticed the following problem.
When I perform a segue clicking, for example, an UIButton, the view loaded with the segue appear with the animation of a modal view (sliding from bottom until it reaches top), but in the storyboard the segue is Show (e.g. Push). In addition, the back button from the navigation controller doesn't appear anymore.
The console print this when I perform a segue:
Attempting to load the view of a view controller while it is deallocating is not allowed and may result in undefined behavior (<UISearchController: 0x7ffde14866b0>)
The problem seems to be present only in a view, when loading other views, I tried to set other views as Initial View Controller and all works.

After taking a look at the Storyboard in the project, I discovered that the problem was due to extra navigation controllers after each Push segue. That is, in addition to the initial (root) navigation controller, the Storyboard contained a UINavigationController as the destination for the problematic Push segues. Removing these extra navigation controllers (but keeping the root navigation controller) solved the problem.

Related

Navigation Controller segue is presented modally

I tried to build a simple segue. Therefor I embedded a Navigation Controller and set it as the initial View Controller. I then created the segue (kind: show) to a different ViewController.
Storyboard
Even the storyboard looks right and I can run the app without any Errors or Warnings.
But when I open the app in the simulator and press on the button to switch screens the new view pops up like a modal presentation.
Simulator
None of this is done programmatically. To solve this issue I tried different segue kinds after that I rebuild the Navigation Controller and segue entirely but it changed nothing.
I just created two view controllers, embedded a nav controller and then connected a button in the first view controller to the second. In the simulator, pressing the button showed the second view controller with a nav bar on top. Try deleting the current segue and nav controller, and then embed in the nav controller and create the segue again.
Storyboard
First page
Second page

'Show' segue in Xcode 6 presents the viewcontroller as a modal in iOS 7

I have two view controllers in my iPhone application (built with swift) built with Xcode 6.1 and uses storyboards.
The first view controller is embedded in a navigation controller in the storyboard and the segue for the second view controller is a 'Show' segue.
When the application is run, it properly shows the transition as a push in iOS 8.x, but in iOS 7.x it appears as a modal without the navigation bar.
My application requirement is to show the transition as a push regardless of whether it's iOS 7 or iOS 8. Any ideas to get this working as push in both versions of the iOS?
I saw a related post where this issue is mentioned, but could not find a solution to the problem: Adaptive segue in storyboard Xcode 6. Is push deprecated?
Any help is appreciated...
Thanks
This solution is different from the others in the following ways:
It includes a method to examine and verify the issue
The cause of the issue is traced to the source (a change in the segue type)
The solution is very simple (delete and recreate a new segue)
Please note the requirements in the text
I just gave a very detailed SO answer that fully explains what is happening and why, but the simple solution is you can delete the Segue that is not pushing and then recreate it on the storyboard. The reason is that there is likely a broken bit of xml in the segue (see extended answer for example/instructions how to confirm this issue).
After you confirm that you have at least one UINavigationController within the view hierarchy, be sure that the segue is NOT a manual segue and does NOT have an action associated with it (by viewing the segue in the storyboard as Source Code). Delete the existing segue and then Ctrl-drag from a UIView/UIControl to the target view controller and if custom action is needed intercept the call to destination controller in prepareForSegue.
Also to confirm that this solution works for you please do the
following:
Verify that your initial view controller (with the arrow on it) is a
UINavigationController and that it has a normal content view
controller as it's root view controller. (or that you embed your
initial view controller inside of a UINavigationController)
Read my extended comments on an earlier response to a very similar question (linked above).
It's possible that you have assigned the Initial View Controller to your UIViewController instead of the UINavigationController. Also, select your UIViewController and check that the "Is Initial View Controller" option is unchecked.
Here is the workaround for that. It looks like a bug in Xcode for iOS 7. You need to create a dummy UINavigationController and link all your free UIViewControllers to this navigation controller. Worked for me.
For me, my storyboard lacked a navigation controller. I am creating the navigation controller programmatically, which works fine in iOS8, but not iOS7.
SOLUTION
In your storyboard, select the main view controller and in the Xcode menu, choose Editor > Embed In > Navigation Controller.
Select the new navigation controller, and in the attributes inspector on the right, under View Controller, make sure Is Initial View Controller is checked.
Run the app. Should be fixed now.
I believe this is a bug in Xcode 7.2. In order to workaround, you can create a "Push (deprecated)" segue and then in the Storyboard editor, select the segue and change it to Show(e.g. Push)
I have had this exact issue with "Show (eg. Push)" for ages and I have just figured it out whilst trying to push a view controller onto a navigation controller that is in a Popover. It seems that the context of the called View Controller is the problem. So this is how I resolved it:
On the View Controller performing the Segue, check the "Defines Context" property in the Storyboard.
In the called View Controller, set the Presentation property to "Current Context".
I ran into this problem and the only solution I found that works for me is to use the deprecated 'Push' segue.
I am using XCode 9 with Swift 4. Note this version came out yesterday (September 20th).
For me this was just a caching bug. I had to choose "Present Modally", run the app and then choose "Show (e.g. Push)". Now everything works fine.
Basically the answer of Jomafer is partly correct. The controller which you are pushing needs to be preceded by a UINavigationController. You dont really need to push the UINavigationController at all. As long the storyboard knows its within a UINavigationController, all is well.
When a "Show" segue comes up as a modal segue in testing it is usually one of two problems:
The first view controller is not inside a navigation controller.
The storyboard XML is corrupted.
The solution to #2 is usually to remove and replace the segue, and it should correct itself. Sometimes just switching to some other presentation style, running, and switching back to "Show" fixes it.
This can also happen to "Show Detail" segues, and it can be more insidious.
Example:
I have a series of view controllers arranged in a UISplitViewController. They have segues Show->Show->Show->Show Detail. The last segue kept coming up modal. I tried everything to fix that last segue. The problem was that the upstream Show segue had been corrupted into a Show Detail segue (even though the storyboard still said it was a Show segue). I had been testing on iPhone, and I did not discover the real problem until I ran it on the iPad simulator. The segues were now Show->Show->Show Detail->Show Detail. On the iPhone the third segue looked just like a Show because it collapsed onto the navigation controller. However, it is still the detail view controller, and you cannot have a Show Detail from a detail view controller, so the OS does what it can to get your view controller on screen and displays it modally.
Lesson 1: Always test your UISplitViewController on iPad to make sure the segues are doing what you think.
Lesson 2: If your segue is coming up modal unexpectedly, check the upstream segues for corruption as well as the segue in question.
Problem in my case was that I created Show (e.g. Push) segue before putting ViewController as rootViewController of UINavigationController. In other words I didn't have UINavigationController.
Then I deleted seque, added UINavigationController and added seque again and it worked. Tested on Xcode 9.0.1 / iOS 11.0.3.

The TabBarItem disappear when I push in other view

I have a TabBarApplication with four views in the main TabBarItem. The problem comes when I go to any of these views and click in any button to go to another view and when I go back by a button linked to the main view, the TabBarItem of the app disappear!!
For example, one view of the app is a tableView in which each element of the list is linked to his external view and it has a back button that should return to the tableView. All the segues are by modal, not push because push segue crash the application and by modal it runs correctly but the problem comes when I returned by clicking the back button of the NavigationItem in the header of the view to his main view and the TabBarItem of the app is not there, is empty.
Each tab should have the view controller set to a navigation controller, with the view controller you want set as the root view controller of the navigation controller. Now you can use push segues and the standard back button that will be added for you. This will bypass the issue (and work much better for you and users).
You current issue is likely related to not really ever going back. Instead, just always presenting new modal view controllers which replace any existing content on screen.

Modal view gets moved to the back when autorotating with MGSplitViewController in iOS 5.x

I've successfully implemented MGSplitViewController in my application and it seems to work pretty well but in iOS 5.x, it has this weird issue.
I start my app with its MGSplitViewController as the root view controller in Portrait.
Trigger my full screen modal view controller that gets displayed over top successfully.
Rotate device to Landscape and the view disappears but there's a piece of it still showing through the split view slider.
Has anyone seen this and/or fixed it? It works just fine in iOS 6.
If I rotate the view back or try to open other modal views, nothing happens. It's like that modal view is stuck behind.
Note: This is how I setup my MGSplitViewController: Known effort to update MGSplitViewController for iOS5 and Storyboards?
Ok well I figured out what the problem was.
I was presenting my modal views (and segues) from the tab Controller or the detail view controller and the modal views (and global modal segues) needed to be presented from the MGSplitViewController instead.
When I was using UISplitviewController, I had been able to present the modal views/segues from that controller but when I switched to MGSplitViewController, it was not represented in the storyboard so I tried setting global modal segues (such as login) to the tab bar controller which is the master controller. This seemed to cause the issue.
For modal views, I ended up presenting them from the MGSplitViewController and I had to remove the segue I had and simply present any modal view controllers I had previously segued directly from the MGSplitViewController instead.

iOS - NavigationBar Title overlapped by previous viewController

we have the issue, that if we pop back from a VC, the current ViewController's navigationBar title is overlapped by the just popped VC navBar title.
But it occurs only sometimes, so i assume it's maybe just a UI refresh bug. Did someone have this problem before, if yes.., how to fix it?
regards ..
I've run into this a few times in the app I maintain. In every case the problem was caused by people doing silly things with navigation controllers.
For example, when wishing to navigate to a new view, a view controller that was already part of a navigation controller's view stack would instantiate a new navigation controller and push its root view controller onto the first navigation controller's view stack.
Then, in the new view controller (the one contained in the second nav controller's view stack), they would try to pop to a previous view. This would cause funny animation bugs and random titles to show on the navigation bar.
The solution was to remove the second navigation controller from the flow (it didn't serve any particular purpose).

Resources