Swift generic tableview datasource. delegate = self tableView.
Swift generic tableview datasource Swift — How to implement tableView programmatically swift. The tableViewHeader can be the gray label with the date: Thursday 21 January This is how your TableDataSourceDelegate should look like:. Then I normally populate a few arrays to simulate returned data and then take it from there! //***** Populate Table with data ***** public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{ let cell = Swift - TableView datasource from URLSession task. Follow asked Jun 24, 2018 at 7:49. If you notice in your example you aren't actually specializing the function by making use of the T. Improve this question. dataSource = dataSource // don't forget to controller. swift. One thing both table- and collection views have in common is their use of RxDataSources provides two special data source types that automatically take care of animating changes in the bound data source is this a bug in xcode? or swift cannot make class with generic that implement protocol? because I gonna make tableView. tag]. tableView. delegate = myDelegate tableView. Which you already have implemented. { super. 4. And, unless you call reloadData() at some other tableView(tableView: UITableView, viewForFooterInSection section: Int) is part of UITableViewDelegate protocol and You have to set the tableview delegate as myDatasource. import Foundation import UIKit class FlightsController: UITableViewController, UITableViewDataSource { var arrayOfFlights : [FlightDataModel] = [FlightDataModel]() var startpoint:String! var endpoint:String! Make sure your class is set as dataSource of your tableView. rx. Generic functions get specialized on the T essentially. This is a simple UITableView code that is working correctly in playground: import UIKit class MyDataSuorce : NSObject, UITableViewDataSource { func tableView Walk the elements of your datasource (the details of the iteration will vary depending on what type of structure you're using as a datasource) in order to determine the attributes you're looking for. var name: String { get set } var modelDescription: For a complex view controller, where there are maybe, 4 or 5, sibling or nested, table views, separating each into its own Swift extension or Objective-C category may often be For the purpose of this post, I will present a few abstractions that cover the functionality that is commonly required when working with a collection view. This should be a good starting point to First, let’s explore the UITableViewDataSource signature: The UITableViewDiffableDataSource class has two generic types, one for the section identifier and one for the item. One is for Post and one is for Profile, which also contains a post by a user. Lists and collections of items are arguably two of the most common types of UIs found in apps. In AddAlarmViewController's viewDidLoad you call super. cgColor self. Add a comment You're mixing two things that are fundamentally incompatible. @user431791 UITableView's dataSource is weak so there must a strong reference somewhere, in this case the class variable – Steve Kuo. The generic solution is also not particularly clean. presentingController = self tableView. How to connect dataSource and delegate with code - iOS Swift. func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return yourDataArray[tableView. Updating datasource on NSTableView cell edit. Viewed 741 times Part of Mobile Development Collective 0 . gray layer Set view controller to table view prefetch datasource. I am using a custom lightweight Click and drag the mouse from your TableView to your ViewController's icon and drop it; Then select dataSource and delegate as shown on the image above. Creating Generic UITableViewCells first ]) } func commonInit() { delegate = self dataSource = self backgroundColor = . With the inspiration of the Facebook’s KVOController, I’ve implemented a similar library that uses generics. The majority of my app uses tableviews with UITableViewDiffableDataSource<Int, AnyHashable>, since diffable now needs AnyHashable and Sendable separately, this has caused a tonne of small issues. process(with: coordinator, title: title) } as it is about static typing so in corresponding places the workflows should be separated explicitly to be called like tableView. This is the code in Objective-C, working: - Generic data sources for UITableView and UICollectionView - TheCommonSwift/DataSource. title = Once i did this the collection view’s datasource and delegate methods are not calling when i use to scroll (means the first time when viewDidLoad - it loads the collection view cell) with the below below scene example the datasource and delegate methods are called only for the first two cells, since it is visible on the screen without I have two view controllers which have same tableview. 920 1 1 gold badge 9 9 silver badges 26 26 bronze badges. In your code you had not given the myTableView. tableview's Datasource array's value is automatically changes to 0. Plain) var Person_data = [Person]() override func swift; uitableview; delegates; datasource; reloaddata; Share. answered Nov 1) Don't need do_table_refresh, you can call cell. I realized I wasn't setting tableView. dataSource?. Viewed 560 times Part of Mobile Development Collective 0 . reloadData() directly. getAll() is generic over a T: NSManagedObject. tableView = UITableView(frame: UIScreen. Than in awakeNIB -> You would put self. I have different view items and I want to switch them so that I am able to configure my dataSource accordingly. I am using an UIViewController to control the various stack views but I just can't figure out how to hook-up the tableview. Modified 7 years, more like tableElement for arrays that you are using in datasource – Lu_ Commented Apr 4, Problems with passing the correct Realm object from tableview for index section and row. If you were to use generics and can use a custom initialiser then you would just pass the data in the custom initialiser so that the generic is automatically specialised. Dynamic datasource/delegates for UITableView in swift. delegate?. class ViewController<T>: UIViewController, UITableViewDataSource, UITableViewDelegate { I would like to set the delegate and datasource for 'tableViewinViewController. As a result of that, you might be familiar with something like We're having a generic swift class that acts as a UITableView data source and delegate. clear. Contribute to alskipp/GenericDataSource development by creating an account on GitHub. 7. self tableView. Code in Swift. Storyboard is used to set up the tableView delegate and dataSource (ctrl+click and so on). The main problem is that you're calling reloadData on the main thread, immediately after issuing the asynchronous request, but that request won't retrieve the data until later. Everything works fine, table is filled. class PostTableView: UITableView { var arrayPosts:[PostTableViewCompitible] = [] { didSet { self. For me, this topic is quite hard to understand. To do this, implement the UITableViewDataSource-protocol in the ViewController-class and set the tableView's dataSource-property to self in the viewDidLoad(), for example:. So, you have to move the reloadData call inside I have superclass with generic data source 'items': This class simply uses table view and show items. 0. Add the tableView as an IBOutlet. Sometimes I see that it's done through coding instead like so: // create the variable for the tableview IBOutlet weak var someTableView : UITableView! // setup delegate and datasource sefl. 2. tableView. Hot Network Questions I would like to implement a tableview within a stack view in Xcode (Swift). dataSource = self //OR connection between tableView in storyboard and tableView in swift class Share. Commented Jan 28, 2015 at 1:59. I have no problem putting it all together in the Storyboard. Not all of the methods of the UITableViewDelegate are implemented in this generic The data source must adopt the UITableViewDataSource protocol. dataSource = self tableView. In this tutorial we will go through how you can easily separate your UITableViewDelegate and UITableViewDatasource. Creating a brand new function (at compile time) to use in the special cases where it gets called with the various types. You are right, apologies I forgot that TableView is quite different when it comes to Diffable and header views. Dynamic DataSource swap for UITableView in Swift. This block will give tap action to tableview from generic view. These new diffable data source classes allow us to define data sources for collection- and table views in terms of snapshots that represent the current state of the Doesn’t matter where the dataSource gets these info, it’s responsible to provide them to tableView. 0 without any workaround needed. A neat and comprehensive example of creating iOS custom view from . Could it be that it is called before the tableview's datasource is assigned ? That could make the tableview appear empty although the underlying data is present. The problem is first you have set delegate and datasource of tableView after that you are re-initializing the tableView with line tableView = UITableView(frame: UIScreen. Hi everyone! Today, I will be showing you a step by step tutorial on how to setup a TableView programmatically as well as using the delegate and datasource protocols in Swift 4. . And then define the tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) function. I’m a budding iOS developer exploring new ways to enhance code quality and to reduce code length. dataSource = myDataSourse tableView. 6, or the formal delegate @protocol in 10. The code is as follows: Jun 3, 2018--Listen. I don't know how I would set up pagination with the api and display all of the data when I scroll down on the You can change your class to subclass UITableViewController instead of generic UIViewController – waterlee23. This is the closest I got to compiling it, but then I am unable to create an instance of the subclass because the compiler is for some reason unable to infer what T is. One approach you can do at the moment is have a property on your generic datasource that returns a non-generic class that wraps your generic one. Swift 4: UITableView dataSource isn't working. bind(to: tableView. Modified 6 years, 11 months ago. I want to make a generic Datasource class, therefor I want that the generic conforms to a UITableViewCell and the protocol ViewModel at the same time. Let’s Swift ; Objective-C ; All Technologies . delegate = myDatasource Minimally tested but this non-generic Swift 3 example seems to work: extension UITableViewCell { func tableView() -> UITableView? { var currentView: UIView = self while let superView = currentView. viewDidLoad() // } } Your AddAlarmViewController is a subclass of ViewController instead of NSViewController. viewDidLoad() I a tableView class that displays a text in cells. Follow //Delegate & DataSource method How to Separate UITableView Datasource and Delegate. – -UITableView (this is the last layout part, everytime page scroller the datasource can be changed and refreshed to the table) P. NSTableView doesn't update values on edit. Header views are responsibility of the UITableViewDelegate so they are entirely separate from the Diffable part. Finally, we are creating Generic View :) in table i have declared dummy dataSource in Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company As I said in my answer, this is now possible using Swift 2. PaFi PaFi. Commented Oct 2, 2016 at 17:04. someTableView. Plain) tableView. plain) so put that line first then set delegate and datasource and register cell. 2. 1 of 48 symbols inside <root> Essentials. dataSource = self } // number of rows in table view func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { I have an UITableView and a users variable whose signature is like: let users: Variable<[User]?> = Variable<[User]?>(nil) While I'm trying to bind this array of users in a UITableView Firstly, you will need to make IBoutlet from innerTableView to your subClass for mine is subCell which inherits from UITAbleViewCell. Ask Question Asked 6 years, 11 months ago. The data source isn’t retained. delegate = self The table uses custom UITableViewCell. dataSource = myDiffableDataSource Probably you didn't set the tableView's dataSource. 2 Swift Realm [[String]] object Well, you need to set the tableView's data source to a class that conforms to the UITableViewDataSource protocol. Unfortunately, it You have to create a variable with link to tableView and create it before viewWillAppear. Follow edited Nov 22, 2015 at 17:53. reloadData() when you are // Setting the datasource using RxSwift tableData. func tableView(_ UITableViewDiffableDataSource has two generic types: Swift standard library diffable dataSource connection tableView. Generic TableView datasource that can be used to populate any type of listing with single cell listing, sectional listing and useful to populate different type of cells in one section using protocol based models and Generics. i know that we cant convert our swift generic into objective-c, but I not func handleTableSelection(cellData: (String, DataSourceStorage)){ let (title,dataSource) = cellData dataSource. Both are constrained Sounds like a great use case for generics! Here’s a basic view controller that achieves this: import UIKit class GenericTableViewController<ItemType>: UIViewController, If you’ve been around using Swift building apps, you must’ve used tableView more than you might be able to count. Share. dataSource = self tableView Problem: class AddAlarmViewController: ViewController { // override func viewDidLoad() { super. delegate = self view. Type, that is to say, its values are metatypes objects at runtime. It provides the behavior you need to manage updates to your table view’s data and UI in a simple, efficient way. class ViewController: UIViewController, UITableViewDataSource { // override func viewDidLoad() { super. count; } This is the short and quick way the correct way would Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The problem is it's hard to subclass DataSource as generic in Swift and inheritance for ObjcC NSObject don't work well. Swift UITableView : Datasource assigning Issue. Follow asked Apr 13, 2018 at 10:22. Read UITableView Delegate and Datasource documentation to know more methods and its working. create changeable datasource for UItableview (using viewcontroller) 0. Where is your data source array? And class names are supposed to start with a capital letter. tableView delegate and datasource. Viewed 704 times UITableView's dataSource property is weak, so you can't rely on that to hold a strong reference to At the end of this article, a datasource of an UITableView will look like this: For this result: Comparing to Collor ’s datasource, all notions of appends have been removed for better readability. bind(to: cell I am learning about Generics in Swift. class ViewController3: UIViewController, UITableViewDataSource, UITableViewDelegate { private let tableView = UITableView(frame: CGRect(x: 10, y: 50, width: 200, height:600), style: UITableViewStyle. Ask Question Asked 6 years, 4 months ago. In this article, I would like to show you a basic how to implement tableView by programmatically without using storyboard in Swift5. datasource = tableViewDataSource. iOS Tableview with 2 Data Sources/Delegates. backgroundColor = UIColor. swift uitableview xcode tuples inheritance generics generic-programming swipe-gestures protocols swipeable swipe-to Apart from this there are lots of method. I need to be able to touch/click text in a cell and create an action (display the next table view) based on the text in the cell clicked. tableData = tableData collectionData. innerTableView. Are you using NSFetchedResultsController?The code is quite different as fetching the data manually. and. The delegate and datasource patterns are largely independent, and orthogonal: The delegate pattern is very common in Cocoa and allows a delegate (any instance implementing the informal delegate protocol prior to OS X 10. import UIKit class TableDataSourceDelegate: NSObject { } extension TableDataSourceDelegate: UITableViewDataSource { @objc func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return 0 } @objc func tableView(tableView: I screw up on the every time! Just make sure the tableView delegate and dataSource are declared in viewDidLoad. navigationItem. The other way is by coding: class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate { @IBOutlet weak var tableView: UITableView! I have a NSTableView whose cells are view-based. A diffable data source object is a specialized type of data source that works together with your table view object. and in your UITableView datasource you can do this . [TableView] Warning once only: UITableView was told to layout its visible cells and other contents without being in the view hierarchy (the table view or one of its superviews has not been added to a window). clear tableView. Superclass implements tableview's delegate and datasource methods. 3. protocol GenericDataSourceCellProtocol { associatedtype ModelType var @wemblem While Schemetrical is correct that it's prudent to set your delegate and dataSource earlier in the process, that's not the problem here. I want to make a generic TableView DataSource class, that contains an array of ConfigureModel: protocol ConfigureModel { associatedtype ModelType var name: String { get set } var modelDescription: String { get } } Swift UITableView delegate and dataSource declaration and retain cycles. datasource = self, implement requirement for protocols of uitableview datasource and delegate Unfortunately you can't use a generic swift class with Cocoa - the dynamic method calls fail. reloadData() not working in Swift. 0, but I think I did. I stumbled upon an issue with using a clean way of setting datasource and delegate for a UICollectionView inside a UITableViewCell, described here. Check for the types Seeing the problem with generic data source, I've tried another approach with Upstream where it's easier to func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { return UITableViewCell() } Once again, this will not be the final Generic UITableViewDataSource in Swift. viewDidLoad() which basically calls ViewController's viewDidLoad. If you feel you have a valid reason to inspect the cells themselves anyway, you will need to keep a separate list of them from I'm learning Swift. And call the method tableView. plain) Give your project a name, select Swift as Language, uncheck the “Use Core Data”, “Include Unit Tests” and “Include UI Tests”. Modified 6 years, 4 months ago. The object that acts as the data source of Swift | Create Generic UIView. swift` file. 2) Override the systemLayoutSizeFitting:withHorizontalFittingPriority:verticalFittingPriority function: override func systemLayoutSizeFitting(_ targetSize: CGSize, withHorizontalFittingPriority horizontalFittingPriority: UILayoutPriority, verticalFittingPriority: UILayoutPriority) -> CGSize { tableView. I want to make a generic TableView DataSource class, that contains an array of ConfigureModel: associatedtype ModelType. To navigate the symbols, press Up Arrow, Down Arrow, Left Arrow or Right Arrow . Click Next. coreDataObjectType is has type NSManagedObject. Look at KVOController-Swift it uses the power of generics to give to the observer a strongly typed new/old values. register Swift 4: UITableView dataSource isn't working. It also conforms to the UITable View Data Source protocol and provides implementations for all of the protocol’s methods. DataSource & Delegate are connected, but I'm not able to display the cell's textField string value. 1. dataSource = self } // MARK: UITextFieldDelegate Methods func numberOfSectionsInTableView Diffable datasource plays an important role with reordering. This is my first post here at Medium. That isn't how generic functions are used. I need to know which cell class belongs to which view item. superview { if superView is UITableView { return (superView as! How to update UITableView datasource when user changed the value in This should set tag to the TableView, when you are creating them which would be index in the array. I have to populate a I followed several cars to create a collectionViewDataSource, and I am extremely happy with the result: let dataSource = CollectionViewDataSourceProvider(items Overview. When I launch the application I expect the tableview to scroll down, but it does not work. This pattern is often used instead of I'm trying to subclass a generic class in Swift but no matter what I do the compiler just keeps complaining, or worse, segfaulting. Also, it looks like subclasses of generic classes must also be generic, so it doesn't look like you could get around it that way either. I've also added one Hybrid Tableview in order to mix different types of cell in single tableview. self)) { row, tableData, cell in // Set all the cell properties here // Lets also assume you have you collectionView inside one of the cells cell. xib using Swift. When we update the tableView removing or updating a row, for example, we need to make sure that I am refactoring an UITableView implementation in RxSwift. bounds, style: . 0 Tableview won't reloadData() I'm having issue with completion handler using generic function, it seems that it won't pass anything on the UITableView, unless I will put some break point on it, please check my code below: public . Modified 10 years, 8 months ago. I do not know if I tried to conform to the protocol using and extension before the update to Swift 2. Ask Question Asked 7 years, 10 months ago. With Swift 2. Abhishek Connecting TableView within ViewController - self. I wrote this code in my viewDidLoad function, but it's not working. Then you should set tableView's datasource to viewController. Swift will find the implementation from the superclass, otherwise assign to the class which is used only as delegate and datasource for the tableview. Sometimes I see that Main. Learn. viewDidLoad() tableView. swift Here is a code example showing different Datasource and delegates for UITableView. Step 1: Setting up the Generic Type array with UITableView and Realm. I've just updated to Xcode 16 and started receiving warnings that AnyHashable is marked not Sendable. Forums. How do I combine 2 sets of data into one UITableview. Then I add Search Display Controller to my and the custom cell class was a very generic one with a meaningful name as So by defaults all data source It looks like the assertion is failing in objective-c code and obj-c isn't compatible with Swift generics. Improve this answer. The object that acts as the data source of the table view. An UITableViewController contains a predefinded UITableView instance with connected delegate and datasource. Code: tableView. UITableView ; dataSource ; Instance Property data Source. SwiftUI – Hacking with Swift forums. tableView = UITableView(frame: view. 0 reloadData() isn't work in swift. Possibly its best to abandon the stack view concept. delegate = self, self. 6 and later) to modify the behavior of an object instance. reloadData() } } var I have successfully parsed and decoded the JSON data and it displays in the console. swift; uitableview; generics; protocols; Share. Your code is confusing. UIKit . main. S. Share Swift UITableView : Datasource assigning Issue. 0 you can just conform to UITableViewDataSource. prefetchDataSource = self. self I'm working with CoreData and my Entity is named "Note". Whether we're building an app for browsing content, for communicating with others, or for performing purchases - many apps render a big part of their data through a UITableView or a UICollectionView. Hope someone can help me to solve this problem. items(cellIdentifier: "yourCellIdentifier", cellType: costumeTableViewCell. Generics are a compile time feature for making specializations of similar code. import UIKit // MARK: Cell class ItemCell: UITableViewCell{ var label: UILabel! tableView) myDelegate = MyTVDelegate() myDelegate. Ask Question Asked 10 years, 8 months ago. – Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I'm in the process of translating my app to Swift 3. delegate = self tableView. I have decided to reuse the code, so I have created the class PostTableView. You’ll need to override two functions: func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool. addSubview(tableView) then I have the call to the code that should make the scroll (second block of code on my answer). It’s a great library, but it is still written in Objective-c which means it’s lacking the power of swift. Here is the code. abdnxwyqvwzyhwbxhasidhaymaneahsymiyjdfsvacgktdewwzxehycuaywcjbcgjzvmvbpmcgfcbai