I can't get the standard back button of iOS into a navigationBar because I can't find it in the Object Library, so can I do it with code or something else?
I just want the normal, standard, blue back button - you know which I mean.
To "automatically" have a back button you need first have a UINavigationController. Then you need to take a different UIViewController and add it as the root view controller in UINavigationController's init method:
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:someOtherViewController];
Be sure to also set a title for someOtherViewController, usually in it's viewDidLoad or initializer. I'll tell you why this is important in a second:
self.title = #"Some other VC";
Then take a second UIViewController and push it onto your navigation controller:
[navigationController pushViewController:anotherViewController animated:YES];
You now have two UIViewControllers on your navigation stack: someOtherViewController and anotherViewController.
Your view will now have a back button with "Some other VC" in it. This is the title of the view controller that was just moved out of view:
http://developer.apple.com/library/ios/#documentation/uikit/reference/UINavigationController_Class/Reference/Reference.html
http://simplecode.me/2011/09/04/an-introduction-to-uinavigationcontroller/
I would also suggest reading up on how UINavigationControllers work and searching this site a bit more for customizing the back button. There are plenty of threads about it.
You can't add the back button yourself. The back button is part of the Navigation controller. If you embed a Navigation controller into your view(s), the back button will appear and be populated by the name of the previous view.
If you're using storyboards select your view controller, then in top menu choose "editor" -> "embed in" -> "navigation controller".
Edit: Here is an exmaple.
I'm running Xcode 7.2. This was driving me crazy, but I figured it out. Here are all the pieces you need to make the Back button appear (make a test project to prove it):
1) You have to have a Navigation Controller and it has to be set to be the initial view controller. So add the Navigation Controller, you will import two tables. Click on the Navigation Controller and on the properties list, check the box that reads "Is Initial View Controller". You will now see and arrow pointing to this view.
2) In our case we want a ViewController and not the included / connected TableViewController, so delete the TableViewController (RootController) and add a new ViewController.
3) Connect the Navigation Controller to the new ViewController by clicking on the top bar of the Navigation controller and orange circle with the arrow pointing left. Hold the Control button on your keyboard down and click and drag from the orange circle to the ViewController and let go. When given the list of options on how to connect the two views, select 'root view controller'.
Done! Now you the functioning navigation bar and you automatically get the back arrow on all segues added. Test this. Add another ViewController and connect to it with a button on the existing ViewController. Use the Control-click-drag approach from the button to the newest ViewController. Select the 'show' option for the new segue you created.
Run it. You'll see the back option has automatically appeared when you click the button and moved to the newest ViewController.
This is all provided by the Navigation Controller, but only when you make another controller the RootController. Happy navigating!
Related
I am using Swift 3, Xcode 8.2, developing for iOS 10.
I've got a storyboard that looks like this.
The left view controller is one of three child view controllers part of a tab view controller. The right view controller is a view controller that reveals when "Continue" is clicked.
However, when clicked, the right view controller takes up the whole view and the tab bar at the bottom disappears. There is a "Back" button at the top which is good and I would like to keep that but how do I get the tab bar back?
The problem is not reproducible based on what you've said. On the contrary, when I set up a storyboard Tab Bar Controller -> Nav Controller -> VC1 -> (push) -> VC2, the tab bar is still there when I go to VC2. I can only conclude that there's some misconfiguration in your storyboard that you have not described accurately.
As shown from the diagram, I am trying to have two viewControllers connected to the viewController on the right that serves as a menu between the viewControllers.
When the app is first run, it will load the first view controller on top. A button will show the menu modally and depending on which button is pressed (I am planning to add more) the corresponding viewController will be shown. The FIRST time that VC2 is pressed, it will load the second viewController, but when the menu is called again and VC2 is pressed, I want it to unwind instead of reload the view controller.
I have managed to unwind to the first viewController but when trying to unwind to the second viewController, the action is ignored. Your help will be greatly appreciated. Thank you.
You cannot unwind to a viewcontroller that has not been previously presented, because the desired destination VC will not be held in the navigation controller stack. Unwind segues are designed to 'pop' several steps back in a navigation history. In your scenario, the only possible pop available is to VC1.
You might also want to review your 'menu' concept, considering that UINavigationController objects can provide this behaviour with little fuss. You also don't need two separate UINavigationController objects to achieve what you want.
To do this, simply connect your menu VC as the root view controller for the UINavigationController, then connect the menu buttons to VC1 & VC2. Then you'll be able to move between the three screens with ease (see below for example).
I currently have 3 tabs connected to a common UITabBarController. When one of the tabs is selected the user is taken to a UITableView with 3 cells which can be selected. When a cell is selected the user is taken to a new page with a UINavigationBar at the top. My understanding is that the UINavigationBar is supposed to include some sort of back button and I couldn't figure out how to enable it.
In place of the default back button, I dragged a UIButton to the corner and connected it to the 'Show Detail' property of the previous view but when I press the UIButton I am taken to the right UITableView but the tabs are missing for navigation. What am I doing wrong? My segues look like this:
The UINavigationController has the back functionality. How to go back one view in UINavigationController?.
Here is some old tutorial on how to combine that with a tabbarcontroller. should still be the same principles.
Is it possible to do navigation within the same window in a mac application ?(Like it is possible in ios apps).I want to show each view in the same window instead of opening different windows on a button click.
e.g When a user clicks a button then the next page should be loaded in the same window.(The next page will have nothing in common with the current page.)
You may use Tab View for easy switching between views on a same window.
UPDATE:
You may also customize your tab view , make it tabless (In the attributes inspector set style to tabless) and use your buttons to switch between views.
You may take help from the following link : http://devcry.heiho.net/2012/01/nstabview-tutorial.html
OR
You may add or remove subviews from your window on button clicks, using
[[yourWindow contentView] addSubview: yourSubview]; // Add subview to window
[yourSubview removeFromSuperview]; //Remove subview
UPDATE:
Steps to swap between views using a tabless tab view.
Drag a NSTabView to your xib.
Set the no. of tabs in attribute inspector to no. of views you want.
Design each view of the tab as per your requirement.
Now in the attribute inspector of tabview, set style to tabless.
Now drag the buttons you want to use for swapping between views. Suppose Button0 and Button1 are for 1st and 2nd view of your tab view.
Create a IBOutlet for your NSTabView in your .h file. Bind it to the referencing outlet of you tabview.
IBOutLet NSTabView* tabview;
Set a IBAction for both your buttons in your .h class file.
In the button action method for button1, use
- (IBAction)button1clicked:(id)sender
{
[tab selectTabViewItemAtIndex:0];
}
Similarly in button2 action method use:
[tab selectTabViewItemAtIndex:1];
In this way you can have any no. of views and you may select any view on button click using
[tab selectTabViewItemAtIndex:(index of the view you want to load)];
In general you want to google for view swapping.
There are tons of examples out there. Some from Apple and lots elsewhere.
Much of it is very similar to iOS.
You need to read the docs a bit too.
Understand NSView and how to load views from nibs, how to create view objects in code, how to add a subview and how to remove a view.
There are many approaches to having different views for different reasons. The right approach is a combination of style, experience and what your app actually needs to do.
Cocoa includes NSBox, NSTabView, and lots of others. Those two can be configured to not display any visual indication that they are containers.
You will also need to understand at least a little about NSWindow to understand its content view (the root container of other views generally)
Right-clicking the Exit icon yields an empty window. Can't Ctrl-drag a connection to any IB elements or corresponding source files. Docs give no love. Doesn't appear in nib files, only storyboards. My assumption is that it's a corollary to segues, but I don't see any new methods to back it up. Anyone?
I had a hard time following the accepted answer so here is more detail.
Given the photo below on view controller C you can "exit" back to any view controller in the segue path.
ViewController A you can write:
- (IBAction)done:(UIStoryboardSegue *)segue {
// Optional place to read data from closing controller
}
ViewController B you can write:
- (IBAction)back:(UIStoryboardSegue *)segue {
// Optional place to read data from closing controller
}
ViewController C you control drag from "back" button to the green exit option and select back:
ViewController C you control drag from "done" button to the green exit option and select done:
Note: Even though the methods are on other view controllers they show up for the ViewController C's exit. Control dragging and selecting a method defines which ViewController to unwind to.
There's a lot of information in the WWDC video "Session 407 - Adopting Storyboards in your App."
Say you have two view controllers linked by a segue. Implement the following exit action on the first view controller:
- (IBAction)done:(UIStoryboardSegue *)segue {
NSLog(#"Popping back to this view controller!");
// reset UI elements etc here
}
Then, on Storyboard scene for the second view controller, Ctrl-drag from a UI element, such as a button, to the exit icon at the bottom of this view controller. The done: action you added to the code of the first controller will appear as an option. Now, activating the button you Ctrl-dragged to the exit icon will pop back to the first view controller and maintain its original state (ie UI elements such as text input supposedly still intact).
As addition to Eric answer here is how it works with swift:
The function you add to the destination controller looks like:
#IBAction func backFromOtherController(segue: UIStoryboardSegue) {
NSLog("I'm back from other controller!")
}