I'm working on a new application that will hold a "main view" leading to another view when clicking on buttons in the main view.
I'm not sure which template to choose as a starting point: Window Based Application or View Based Application.
Can someone explain the differences between them?
What should I take into consideration when selecting between the two?
In your case, I would use the View Based Application. The difference between window and view is that the window template does not create a view controller class and related user interface file (.xib). It just gives you a blank window. In iOS there can only be 1 window, but multiple views can be presented on that window.
The View based template does everything that the window based template does PLUS it creates a view controller class and that class's xib file. In addition, it adds that first view controller to your window. In iOS, when you want to show another view, you'll almost certainly want another view controller class. View controller classes can add additional views on top of themselves with ease.
Since the Window template gives you 0 to start with and the View template gives you 1 to start with and you'll eventually need 2 for your two views, it'll be less work for you to start with the View template.
Related
I am producing an application written in swift in Xcode, I have reached a point in development in which I need to be capable of instancing views. Ideally I would alter the hierarchy of my program to contain a 'Main' or 'Parent' view, the main view would be responsible for displaying the views given to it.
Instancing other view controllers and passing the instance to the main view would be my goal, however, i am inexperienced with Xcode and swift, I am unsure how to go about including a main view without altering my entire storyboard hierarchy.
Here is an image to give a visual description of the current structure.
The intention is to alter the hierarchy to include a main/ parent / master view, the view would be an empty display item which will display all views as and when needed, ideally I would keep the tab control method.
Mainly and most importantly the view will allow instances of view controllers to be displayed, closed and refreshed without impacting other aspects of the app.
Code seems irrelevant here as my views are handled by the storyboard. Something which would be really helpful to me here would be a brief explanation of how I can handle instancing with the new hierarchy.
Thank you in advance for any help regarding this matter
A view controller can serve as a custom parent view controller of one or more child view controllers, displaying their views in any desired manner within its own view's interface.
You can instantiate a view controller in any desired manner. If you wish to pluck a view controller instance out of the storyboard (because you have already designed its view there), call:
https://developer.apple.com/documentation/uikit/uistoryboard/1616214-instantiateviewcontroller
Your view controller in the storyboard will need to have a storyboard ID string so that you can identify it.
After you've plucked a view controller from the storyboard in that way, to display its view in your interface, you must do the following dance:
The parent calls https://developer.apple.com/documentation/uikit/uiviewcontroller/1621394-addchild
The parent captures the view controller's view and sticks it into the interface as a subview of the parent's own view.
The parent calls https://developer.apple.com/documentation/uikit/uiviewcontroller/1621405-didmove
The two view controllers now stand in a legal parent-child relationship and both view controllers will work properly. They can even refer to one another.
If you wish to remove the child view controller's view from the interface, you must reverse the dance:
The parent calls https://developer.apple.com/documentation/uikit/uiviewcontroller/1621381-willmove with a nil parameter
The parent removes the child view controller's view from the interface
The parent calls https://developer.apple.com/documentation/uikit/uiviewcontroller/1621425-removefromparent
Please read "Implementing a Container View Controller" on the main view controller docs page:
https://developer.apple.com/documentation/uikit/uiviewcontroller
Does choosing any template while creating Xcode (Single View Application, Master Detail Application, Page Based Application, Tabbed Application) project means I can not change the application UI later?
Can I have Master Detail View + Page Based view inside a Single view Application?
Im new to iOS So please bear with me. Thanks.
You can make whatever changes you want. The original template you choose simply gives you an initial app with a storyboard setup with the minimum needed. The single view just gives you a single view controller. The master detail gives you a split view controller setup with a master view controller and a table view in a navigation controller for the detail view controller.
With that starting point you can add, edit, or completely replace that setup to meet your needs.
I am trying to create an app for iOS using Swift but running into problems with the very basics.
To keep it simple I just want the app to initially be a single view application with a button and some sort of list view on the page. I believe a TableView is what is recommended here. When I click the button, I just want it to populate the list/table view with some entries, that's it. To start with, I don't care if these entries are hard-coded, I just want to get something working.
I have been looking at different samples but I am getting confused. Some of them seem to suggest using a TableViewController others don't. When I use a tableview controller, the UI I had created seems to get completely replaced with just an empty tableview list and the button is gone.
I previously have developed apps in Windows phone and found it a lot easier. I'd just add a listview object and in the click method of button, add the items programmatically etc. But this is my first time trying to create an iOS app and it seems a lot more confusing. There are delegates, controllers, views all seemingly needed in order to do something very simple.
Can anyone give me some basic step by step instructions about how to add a tableview to an application and load some data into it through a button click?
Make sure you are clear about the difference between a view and a view controller.
iOS uses the MVC design pattern (Model View Controller).
A view object displays contents to the user and responds to user interaction.
A model object stores state data.
A controller object drives the app logic and mediates between the model and the view.
A UITableViewController is a special subclass of a UIViewController who's job is to manage a table view. It has some extra support in it that makes it a good choice for managing a table view, BUT... there is one annoying thing about it. It is designed so the ONLY view it can manage is a table view. You can't use a UITableViewController if you want to add buttons, labels, and other UI elements to your screen outside of the table view.
What I usually do is to create a create a table view controller, create a separate regular view controller, add a container view to the regular view controller, and then use an embed segue to embed the table view controller inside the view controller. (you just control-drag from the container view to the table view controller.) That way you get the best of both worlds. You may want to create a protocol that the table view controller would use to communicate with it's parent view controller.
You should be able to find a tutorial online on setting up a table view controller as a child of another view controller using container views and embed segues. It's quite easy.
I am creating an iOS article reading application which contain multiple headings,images and multiline text using platform Xcode(5.1) and chose template Empty application.
I'm in the middle of project to complete.
Now , Is it possible to change Empty application to Master Detail application.
I'm in the middle of project to complete. Now , Is it possible to
change Empty application to Master Detail application
You can achieve the Master Detail application template dynamically/while running your app using UISplitViewController.
The UISplitViewController class is a container view controller that manages the presentation of two side-by-side view controllers. You use this class to implement a master-detail interface, in which the left-side view controller presents a list of items and the right-side presents details of the selected item. Split view controllers are for use exclusively on iPad devices. Attempting to create one on other devices results in an exception.
By default, the split view controller displays both of its view controllers when in a landscape orientation. However, in a portrait orientation, the split view controller displays only the detail view controller by default.
No, you cannot change the template after creation of project in xcode. The only thing you have to change before the creation of project.
The template does not restrict what can and can't be done in your app. It just sets out a boilerplate set up of your initial app.
"Changing the template" makes no sense.
The master detail template just uses a uinavigationcontroller as the main navigation. You can just add this to your storyboard.
I am at the beginning of developing an iOS app I am having trouble understanding the MVC (Model-View-Controller) design pattern. I thought I had it down but the more I read the more confused I get. I don't know if this should be an iOS specific question or if the same goes for every use of MVC. I am not using storyboards btw, I want to do it all programmatically.
I believe I understand the basic relationship between Controllers and Models, it's the separation of Views and Controllers that I don't get. Let's say I want to create a UIButton and display it on the screen. Should I initiate the button in the Controller or the View? The controller is responsible for what should be displayed, correct? Wouldn't you just call on a View to display that and not worry about creating the button in the Controller? From what I understand, View Controllers are just Controllers and should therefore control the View, not be the View. It seems like most people do just about everything in the View Controllers. I guess my question boils down to what code goes where?
UIViewController is controller part in the MVC pattern of code.
M(Model)
C(ontroller)
V(View)
Controllers handle navigation between different views , etc.
From here you can get more idea : view and viewcontroller
A view is an object that is drawn to the screen. It may also contain other views (subviews) that are inside it and move with it. Views can get touch events and change their visual state in response. Views are dumb, and do not know about the structure of your application, and are simply told to display themselves in some state.
A view controller is not drawable to the screen directly, it manages a group of view objects. View controllers usually have a single view with many subviews. The view controller manages the state of these views. A view controller is smart, and has knowledge of your application's inner workings. It tells the dumb view objects what to do and how to show themselves.
A view controller is the glue between you overall application and the screen. It controls the views that it owns according to the logic of your application
About View Controllers
View controllers are a vital link between an app’s data and its visual appearance. Whenever an iOS app displays a user interface, the displayed content is managed by a view controller or a group of view controllers coordinating with each other. Therefore, view controllers provide the skeletal framework on which you build your apps.
iOS provides many built-in view controller classes to support standard user interface pieces, such as navigation and tab bars. As part of developing an app, you also implement one or more custom controllers to display the content specific to your app.
Not sure about any iOS specifics but from a PHP standpoint controllers are there to get any data that is needed for the view (via models) and then pass that data to the view.
The view is there to render things to the screen only and should have no logic in it.
So from a website point of view if you wanted to display a users name on the screen:
The controller would request the username from the model
The model would get the username and return it to the controller
The controller would then pass the username to the view
And the view would then render the username.
Hope that helps.
To be not specific, but on a upper layer, you can say as following :
You can put controller code in class extending UIViewControllers
You can put view code in class extending UIView
You can put model code in class extending NSObject