Hi I have a Tab Bar controller that open a Table View Controller.
Then, clicking a row, I would like to open another ViewController with push method (I need to view new window from right... like an email).
But I receive always an error on push. I've also used the option. "Editor ->Embedded in -> navigartion controller" for table view, but without luck...
Any idea?
Related
I am using Firebase in my project, and want to retrieve the data from the database and show it in my Text View in my profile fragment which is a part of Bottom Navigation View. I tried the bundle but it throws error for some reason. So i wanted to know is there any easy way to transfer data from main activity to fragment, specifically one row of Firebase data in different element of the fragment.
Make an interface between the the main activity and the fragment when use click to show the fragment ,fire the interface and pass the sting or what you need
another solution you can use a viewModel between the activity and fragment and fire Live data between them
you can also use EventBus
I have 1 (rootViewController) view controller which is embedded in navigation controller. Then i pushed another view controller (secondViewController), which has search controller in title view. When i am trying search become first responder (Active) i got this in terminal:
Warning: Attempt to present
"AppName.CustomSearchViewController: 0x7face0c20eb0> on
whose view is
not in the window hierarchy!
This happens only in iOS lower than 11. When i embed this second view controller in navigation controller and present it modally all works good, but i need exactly pushing. How can i solve this?
I solved it! I need to make definesPresentationContext false in rootViewController to make it work on another one!
Generally we use UIImagePickerDelegate to get the selected image from user. I need the image after the user captured it without asking usephoto/ cancel. Is it possible?
Step 1 : Remove default camera controls by this method.
[pickerController setShowsCameraControls:NO];
Step 2 : Create an Overlay view and put one button on the overlay view to capture image.Set the view as picker controller's overlay view.
[pickerController setCameraOverlayView:camOverlay];
In the button action write this method:
[pickerController takePicture];
This automatically calls the delegate method and we will get the image directly with out use photo or cancel Step.
NOTE: Source type of picker controller should be camera to implement the above stuff.
pickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
set delegate to self.
Functionnaly :
On one of my components of my application, I have an editing/lock system. When a user starts editing, he locks the file so other users cannot edit it.
Problem scenario : When the user activates "edition mode" and leaves screen, I would like to show a alert with two options : save changes, or discard changes.
There are different ways to exit screen :
There is a List on the left side containing other possible editabel data. A click changes the data in my component.
There is a menubar on top leading to other screens.
The edition component is embedded in a Tab navigator. When changing tabs, the alert has to show.
Closing browser.
Do I have to catch all of these events and plug at all those places?
Is there any kind of focusout mecanism?
The answer to the first question is: YES.
You need to watch all possible exit events that could harm the currently edited data.
Well, the problem is now how to manage this properly. Using an MVC framework you would trigger the appropriate commands from your components:
CHANGE_LIST_ITEM (new item)
CHANGE_TAB (new tab)
CHANGE_SCREEN (new screen)
Each command then checks if the currently edited tab has been saved or not. If not, it displays the Alert. Else, if there are no changes, it allows the list, the screen chooser and the tab bar to continue.
So your components (list, screens, tabs) need to implement some kind of rollback or preventDefault mechanism. Generally, changing their state must be allowed by a central validator (in MVC the command).
In the case of the list: I would suggest that the list is not selectable by mouse click but only programmatically. You set a listener on the list item click event. If the command allows setting of a new item it will notify the list. In MVC usually by sending an async message that gets received by the list's mediator. [[And even more correct: The command would set some model properties (e.g. currentListItem) and the model than sends an async message.]]
Edit: For the browser close event, you need to call a JavaScript expert.
I'm using MonoTouch and my application setup looks something like this,
NavController
-TabBarController
-NavController
-View1
This works then I click on a tab and am directed to View1. The problem is that this was performed by the tabBarController and not the navigationController. So I get no Back button. Is there a way to capture a TabItemClicked event and manually use the NavigationController to push the View1 onto the stack? So I can get a back button.
I'm hiding the TabBar once I get to View1, so at the moment, there is no way back from View1.
Hope it may help you
http://21gingerman.wordpress.com/2009/04/06/tutorial-and-sample-code-for-iphone-app-with-tab-bar-and-nav-bar/