Which is the best approach in order to create a Top Navigation Bar like this one on Instagram?
I have a Tab Bar controller which has 5 views but I do not understand how to create another navigation bar inside one of this views. Should I create two labels and connect each of them with another view or is there something better to achieve this?
Your approach is good, would be nice to see some screenshots or code to fully understand it.
If you want to put navigation bar inside those tab bar views you need to put a container view that connects to a navigation controller.
I created a simple project to show you how I achieved this.
Using a scrollview to contain another two view containers embedded with some navigation controllers:
The view containers allows you to embed any type of view / controller:
Apple docs has a nice reference of how to do this, in your case you just need to change ViewController to NavigationController.
And if you don't mind to use third party code, well there are plenty of options for you to choose:
PolioPager
import PolioPager
class ViewController: MainContainerViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
override func tabItems()-> [TabItem] {
return [TabItem(title: "One"),TabItem(title: "Two")]
}
override func viewControllers()-> [UIViewController]
{
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController1 = storyboard.instantiateViewController(withIdentifier: "cont1")
let viewController2 = storyboard.instantiateViewController(withIdentifier: "cont2")
return [viewController1, viewController2]
}
}
In above example you can use PolioPager to instantiate 2 different navigation view controllers, identified by storyboard identifier cont1 cont2 for example.
Other trip party libraries:
https://github.com/XuYanci/GLViewPagerController
https://github.com/rechsteiner/Parchment
Related
I have a navigation controller and several view controllers. When I click on a table cell in the Stocks View Controller, I open the Stock Chart View Controller. In it I have 3 buttons "Chart", "Summary", "News". I want to click on "Summary" to move to the Stock Summary View Controller, but an error occurs for several dozen lines. How can I implement transitions in such a menu?
And how do I click on" back" in Stock Chart View Controller and Stock Summary View Controller to return to Stocks View Controller?
Code for switching from the Stock Chart View Controller to the Stock Summary View Controller:
#IBAction func onSummaryButtonTapped(_ sender: Any) {
let storyboard = UIStoryboard(name: "Main", bundle: .main)
let viewController = storyboard.instantiateViewController(identifier: "StockSummaryViewController") as! StockSummaryViewController
navigationController?.pushViewController(viewController, animated: true)
}
Storyboard:
enter image description here
Your App:
NavigationVC > StocksVC (tapping on a cell) ➡ StockChartVC > StockSummaryVC > etc.
➡ is important here, how do you navigate from StocksVC to StockChartVC? Do you push StockChartVC or present modally? Since you do segues programmatically, it can't bee seen in the image.
I can provide the following info to help you:
The push-style navigation automatically contains/adds controls for backward navigation because it adds all ViewControllers to its navigation stack; all ViewControllers will be embedded in the same NavigationController
In case of presenting scenes modally, these ViewControllers have to have their own NavigationController. thus, your StockChartVC has to be embedded in its own NavigationController
I believe you do the push-style segue from StocksVC to StockChartVC and also pushing from StockChartVC to StockSummaryVC; in that case, there should be no problem at all. Moreover (as I wrote), all they VCs will be added controls for backward navigation. Everything will be working just fine!
So pay attention how you are segueing and according to that, implement the right navigation.
I am having one view controller which should be hide and show from everywhere in the app without initializing it again. So I just want to know that how can I achieve this. Like by adding that view controller as childView or by presenting it to navigation controller or anything else.
The idea is that the view controller can be shown or hide from any screen of the app.
You can make a view controller as a cocoa touch class... and you can add a xib to it.. once you design the interface for the view controller..
You can make a singleton class and keep the shared instance like this:
class YourViewController: UIViewController {
static let sharedInstance = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "yourStoryBoardId")
}
To show this just do :
func someFunc() {
show(YourViewController.sharedInstance, sender: self)
}
I once did something like this in one of my apps.. i think its a standard approach.
You could also see this for more info and source
I have been scratching my head trying to figure out how to do this. If anyone has some insight it would be greatly appreciated. I've attempted to do this using segues and push/presentViewController methods. With pushViewController nothing happens.
Scenario: Split view controller has two navigation controllers connected (one as master, one as detail). The master's navigation controller has a form with various cells that should control what is being displayed in the right hand side detail view when in landscape mode on the iPad. The navigation controller connected to the detail view has storyboard references connected to it (3 of them).
What I want to do: From the master view controller (which is the app menu), I would like to control what is being displayed in the detail view while maintaining navigation bar.
Attempt 1:
let detailVC = self.splitViewController!.viewControllers[1]
let newVC = UIStoryboard(name: "D", bundle: nil).instantiateViewControllerWithIdentifier("P")
detailVC.self.navigationController?.pushViewController(newVC, animated: true)
Attempt 2:
let detailVC = self.splitViewController!.viewControllers[1]
let newVC = UIStoryboard(name: "D", bundle: nil).instantiateViewControllerWithIdentifier("P")
detailVC.performSegueWithIdentifier("navP", sender: self)
One other related question I had...if a user does many hops between several of the menu options, how can one "reset" the back button's history in the navigation bar to prevent a case where clicking back will cycle you through the same several views?
You shouldn't be pushing the view controller or performing a segue but calling showViewController.
Do you definitely need to maintain the navigation bar or can you show different UINavigationBars (via showing your view controller embedded in an UINavigationViewController potentially)?
Alternatively just show a single view controller and use the logic you add in your view controller to change the content under the control of your master view controller.
After some experimenting with the best approach I solved this. :) Solution below for all devices (iPhone/iPad).
Define extension for UISplitViewController:
Modified version based off https://stackoverflow.com/users/4418308/santiago-bendavid
extension UISplitViewController {
func toggleMasterView() {
if UIScreen.mainScreen().bounds.height > UIScreen.mainScreen().bounds.width {
var nextDisplayMode: UISplitViewControllerDisplayMode
switch(self.preferredDisplayMode){
case .PrimaryHidden:
nextDisplayMode = .AllVisible
default:
nextDisplayMode = .PrimaryHidden
}
UIView.animateWithDuration(0.2) { () -> Void in
self.preferredDisplayMode = nextDisplayMode
}
} else {
// do nothing
}
}
}
Code in master navigation controller's root view controller:
let newVC = UIStoryboard(name: "some_storyboard_id", bundle: nil).instantiateInitialViewController()
if self.splitViewController!.viewControllers.count == 2 {
let detailVC = self.splitViewController!.viewControllers[self.splitViewController!.viewControllers.endIndex - 1]
if detailVC.childViewControllers[detailVC.childViewControllers.count - 1].restorationIdentifier! != "some_id_here" {
detailVC.childViewControllers[0].navigationController?.pushViewController(newVC!, animated: true)
}
self.splitViewController!.toggleMasterView()
self.navigationController?.splitViewController!.preferredDisplayMode = .Automatic
} else {
self.navigationController?.pushViewController(newVC!, animated: true)
}
This code works on regular iPhone (non-Plus) where the master view controller is the sole controller used for navigation. On iPads and iPhone 6/6s+ models (which behave same as an iPad) I check whether the current view is already present using the restoration ID property, and then present the new view if it's not the same as the one already rendered on screen and dismiss the master view controller if we're in portrait mode. If in landscape, we keep it on screen (default behavior).
I want to add Layer SDK to my application (using Swift).
All view controllers here are created programmatically. Therefore I can't segue to them. I have 4 tabs in my application (UITabBarController). One of them is chat. In the chat tab I created a segue to UINavigationController. Now I want to load conversationListViewController in this UINavigationController. For that I created a class for this UINavigationController i.e. ConversationListViewController and added the following code:
class ChatNavigationViewController: UINavigationController {
var conversationListViewController: ConversationListViewController!
var layerClient: LYRClient!
override func viewDidLoad() {
let appDelegate = UIApplication.sharedApplication().delegate as!AppDelegate
self.layerClient = appDelegate.layerClient
self.conversationListViewController = ConversationListViewController(layerClient: appDelegate.layerClient)
self.conversationListViewController.displaysAvatarItem = true
self.navigationController!.pushViewController(self.conversationListViewController, animated: true)
}
}
But this is not working. And giving this kind of effect: the ConversationViewController is not loaded in UINavigationController. I am not sure if I am doing it the correct way. I'm searching for the correct way, but unable to find.
I Solved it. I dragged new NavigationViewController and added ConversationListViewController to rootviewController.I think i should try this first. Anyways thanks guys for your help.
Because you want to do this programatically:
You need to manually initialize the controller before stacking it up on the Navigation Controller. Try this:
navigationController?.pushViewController(self.conversationListViewController.init(), animated: true)
I have 1 tab bar controller in storyboard and 1 UIViewController associated with it. I would like to re-use the same UIViewController in order to create second item in tab bar. When I am creating second relation from tab bar to view controller I need to specify 2 different items names. How can I re-use same view controller and set different items names from storyboard? If not possible to do it in storyboard, then do I have to rename each in tab bar controller class or there is better way?
I was going to provide different data to view controller in prepareforsegue.
UPDATE:
little more details and clarification
In above screenshot marked VC at the moment is reachable a) directly from tab, b) through 3 transitions. I want to add another DIRECT relation to initial tab bar, just like in case of "a".
I can give you a little tweak for that and at least that worked for me.
Drag a tabbarcontroller and associated tab item view controllers to
your storyboard. Name them as you like.
Create an extra view controller that you want to reuse from your storyboard.
Add container views to each tab item view controllers and remove their default embedded view controllers.
Create embed segue from each tab item controller to your re-usuable view controller.
The configuration looks something like the following:
Thus you can use the same embedded VC for different tabbar item. Obviously if you need the reference of the tabbarcontroller, you need to use self.parentViewController.tabBarController instead of self.tabBarController directly. But it solves the issue of reusing a VC right from the storyboard.
I've found much simpler solution using storyboard only.
Setup your storyboard like this:
Then in your Navigation Controller Identity Inspector set Restoration ID like this:
And in your ViewController class file put the following code:
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.navigationItem.title = parent?.restorationIdentifier
label.text = parent?.restorationIdentifier
}
or do what you like based on parent?.restorationIdentifier value
If you don't want the Navigation TopBar to appear on the ViewController just set it to None in Attributes Inspector of the desired Navigation Controller like this:
That's it! Hope it helps.
Yes you can.
All you need to do is to create a new View Controller in StoryBoard as if there is going to be a different View Controller for tab 2. Then Select the 2nd view controller and simply add its class name the same classname of view controller 1
Things to note:
When you are sharing the same view controller class (.m ad .h) files, each tab will create a NEW instance of that class.
Edit:
This works as long as you have either a "custom" cell scenario (i.e. reusing two table view controllers) OR, have all your views inside a "container view" (i.e. reusing UIView).
I needed slightly different solution than the accepted answer. I needed to use same Table View Controller with the different data source for different tab bar items. So in the storyboard, i created two Navigation Controllers with same classes like this;
I also give different "Restoration ID" to each of them.
For the first one, I gave "navCont1" and "navCont2" for the second one.
In subclass("GeneralNavCont") of these Navigation Controllers; I override init method and check restoration id of self. Then i initiate my TableViewController and set its data source based on ids like this;
class GeneralNavCont: UINavigationController {
var dataSource1 = [Countries]()
var dataSource2 = [Cities]()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
initiateTableVCBasedOnId()
}
func initiateTableVCBasedOnId() {
let storyBoard = UIStoryboard(name: "Main", bundle: nil)
let tableVC = storyBoard.instantiateViewController(withIdentifier: "tableVC") as! MyTableViewController
if self.restorationIdentifier == "navCont1" {
tableVC.dataSource = self.dataSource1
self.viewControllers = [tableVC]
}
else if self.restorationIdentifier == "navCont2" {
tableVC.dataSource = self.dataSource2
self.viewControllers = [tableVC]
}
}
}
Hope it helps someone. Cheers.