How can i create a searchbar like safari
Just like the photos I posted
That the searchbar becomes small or hidden when the screen is scrolled
...
PHOTOS
It would be great if you could tell, what you've tried before.
That way we can help you better.
In order to do that, you need a view of type UIScrollView (UITableView, UICollectionView, etc.).
Implement this delegate method and it should do the trick.
Adjust the swipeThreshold variable to fit your needs.
func scrollViewDidScroll(_ scrollView: UIScrollView) {
let swipeThreshold: CGFloat = 10
let y = scrollView.panGestureRecognizer.translation(in: scrollView).y
if y != 0 && swipeThreshold > y {
navigationController?.setNavigationBarHidden(true, animated: true)
} else {
navigationController?.setNavigationBarHidden(false, animated: true)
}
}
Old answer as reference:
Here is one way to do it — by using SFSafariViewController using SafariServices.
import UIKit
import SafariServices
class MainViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
// Call this method when you want to show the browser
func doSomething() {
let url = URL(string: "https://www.google.com")!
let safariViewController = SFSafariViewController(url: url)
present(safariViewController, animated: true, completion: nil)
}
}
Related
while using a MockTableView this code still not calling reloadData() from the mock,
please i wanna know what is wrong here.
following this book: Test-Driven IOS Development with Swift 4 - Third Edition
page 164, i was as an exercise
full code repo - on github
ItemListViewController.swift
import UIKit
class ItemListViewController: UIViewController, ItemManagerSettable {
#IBOutlet var tableView: UITableView!
#IBOutlet var dataProvider: (UITableViewDataSource & UITableViewDelegate &
ItemManagerSettable)!
var itemManager: ItemManager?
override func viewDidLoad() {
super.viewDidLoad()
itemManager = ItemManager()
dataProvider.itemManager = itemManager
tableView.dataSource = dataProvider
tableView.delegate = dataProvider
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
tableView.reloadData()
}
#IBAction func addItem(_ sender: UIBarButtonItem) {
if let nextViewController =
storyboard?.instantiateViewController(
withIdentifier: "InputViewController")
as? InputViewController {
nextViewController.itemManager = itemManager
present(nextViewController, animated: true, completion: nil)
}
}
}
ItemListViewControllerTest.swift
import XCTest
#testable import ToDo
class ItemListViewControllerTest: XCTestCase {
var sut: ItemListViewController!
var addButton: UIBarButtonItem!
var action: Selector!
override func setUpWithError() throws {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier:
"ItemListViewController")
sut = vc as? ItemListViewController
addButton = sut.navigationItem.rightBarButtonItem
action = addButton.action
UIApplication.shared.keyWindow?.rootViewController = sut
sut.loadViewIfNeeded()
}
override func tearDownWithError() throws {}
func testItemListVC_ReloadTableViewWhenAddNewTodoItem() {
let mockTableView = MocktableView()
sut.tableView = mockTableView
guard let addButton = sut.navigationItem.rightBarButtonItem else{
XCTFail()
return
}
guard let action = addButton.action else{
XCTFail()
return
}
sut.performSelector(onMainThread: action, with: addButton, waitUntilDone: true)
guard let inputViewController = sut.presentedViewController as?
InputViewController else{
XCTFail()
return
}
inputViewController.titleTextField.text = "Test Title"
inputViewController.save()
XCTAssertTrue(mockTableView.calledReloadData)
}
}
extension ItemListViewControllerTest{
class MocktableView: UITableView{
var calledReloadData: Bool = false
override func reloadData() {
calledReloadData = true
super.reloadData()
}
}
}
You inject a MockTableview Then you call loadViewIfNeeded(). But because this view controller is storyboard-based and the table view is an outlet, the actual table view is loaded at this time. This replaces your MockTableview.
One solution is:
Call loadViewIfNeeded() first
Inject the MockTableview to replace the actual table view
Call viewDidLoad() directly. Even though loadViewIfNeeded() already called it, we need to repeat it now that we have a different tableview in place.
Another possible solution:
Avoid MockTableview completely. Continue to use a real table view. You can test whether it reloads data by checking whether the number of rows matches the changed data.
Yet another solution:
Avoid storyboards. You can do this with plain XIBs (but these lack table view prototype cells) or programmatically.
By the way, I see all your tearDownWithError() implementations are empty. Be sure to tear down everything you set up. Otherwise you will end up with multiple instances of your system under test alive at the same time. I explain there here: https://qualitycoding.org/xctestcase-teardown/
Good day everyone,
I have root view controller set up as my HomeViewController, in this project i am using token based authentication ( which i am storing in user defaults ) and i am using token for all my API calls.
I have a check in my viewWillAppear method to check if there is access token present and then i make the api call in viewDidAppear to populate the collection view, and this works perfectly fine at all times except the first time.
If I log in for the first time it hits the viewWillAppear, viewDidAppear and then login screen pops up and once i authenticate the user and save it in the UserDefaults, dismiss the login screen and in the HomeViewController all i get is a spinner ( which means that viewDidAppear is also been called ) but if i close the app and open it again it all works fine.
What can i change in my code to make it work in the first time please and thank you!!
class HomeViewController: UIViewController {
// MARK: - Properties
let refreshControl = UIRefreshControl()
var publishedReportList: [ReportListDetail] = []
private let reportsCollectionView: UICollectionView = {
let viewLayout = UICollectionViewFlowLayout()
let collectionView = UICollectionView(frame: .zero, collectionViewLayout: viewLayout)
collectionView.register(ReportsCollectionViewCell.self, forCellWithReuseIdentifier: ReportsCollectionViewCell.identifier)
collectionView.backgroundColor = .systemBackground
return collectionView
}()
// MARK: - Initialisation
override func viewDidLoad() {
super.viewDidLoad()
reportsCollectionView.delegate = self
reportsCollectionView.dataSource = self
print(publishedReportList.count)
refreshControl.tintColor = .blue
refreshControl.addTarget(self, action: #selector(pullToRefresh), for: .valueChanged)
reportsCollectionView.addSubview(refreshControl)
reportsCollectionView.alwaysBounceVertical = true
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// check auth status
handleNotAuthenticated()
}
override func viewDidAppear(_ animated: Bool) {
// call for reports
getReportUserLayout()
}
// MARK: - Handlers
#objc func pullToRefresh() {
// Code to refresh table view
getReportUserLayout()
}
fileprivate func getReportUserLayout() {
// publishedReportList.removeAll()
whySuchEmptyLabel.isHidden = true
spinner.show(in: view)
spinner.textLabel.text = "Loading Reports.."
DispatchQueue.main.async {
ReportsManager.shared.getReportData { [weak self] (listOfReports) in
guard let strongSelf = self else { return }
strongSelf.publishedReportList = listOfReports
if listOfReports.count == 0 {
strongSelf.whySuchEmptyLabel.isHidden = false
}
strongSelf.reportsCollectionView.reloadData()
strongSelf.spinner.dismiss()
strongSelf.refreshControl.endRefreshing()
}
}
}
private func handleNotAuthenticated() {
if UserDefaults.standard.string(forKey: "accessToken") == nil {
// show login view controller
let loginVC = LoginViewController()
loginVC.modalPresentationStyle = .overCurrentContext
present(loginVC, animated: false)
}
}
}
You are in the HomeViewController and presenting loginVC, so it will not trigger viewDidAppear or viewWillAppear because it is not disappeared from the app. You have to use closure or delegate or notification to communicate back to the HomeViewController. You can also use the Combine framework and save the state. Here is an example of using delegate.
// Add protocol
protocol ViewControllerDelegate {
func loggedIn()
}
class HomeViewController: UIViewController, ViewControllerDelegate {
private func handleNotAuthenticated() {
if UserDefaults.standard.string(forKey: "accessToken") == nil {
let loginVC = LoginViewController()
loginVC.modalPresentationStyle = .overCurrentContext
loginVC.viewDelegate = self
present(loginVC, animated: false)
}
}
}
class LoginViewController: UIViewController {
var viewDelegate: ViewControllerDelegate? = nil
func userLoggedIn() {
self.viewDelegate?.loggedIn()
}
}
My project has a few views before it call a ARview with a reality composer project. I enabled the coaching view in it using the demo code that apple provides. My problem is. If I make a button to go back from that view and call it again, the camera starts to flick from second to second. If I do it again, the flick increases until that, if I do it again, the program crashes. How can I make that view completely new, like the first time I loaded it? I’ve tried removing the anchor from the view.session. Tried pausing the ar session. Could anyone help me with that?
This is my code
import UIKit
import RealityKit
import ARKit
class ARHomeViewController: UIViewController {
#IBOutlet var arView: ARView!
#IBOutlet weak var coachingOverlay: ARCoachingOverlayView!
override func viewDidLoad()
{
super.viewDidLoad()
presentCoachingOverlay()
addScene()
}
/// Begins the coaching process that instructs the user's movement during
/// ARKit's session initialization.
func presentCoachingOverlay() {
coachingOverlay.session = arView.session
coachingOverlay.delegate = self
coachingOverlay.goal = .horizontalPlane
coachingOverlay.activatesAutomatically = false
self.coachingOverlay.setActive(true, animated: true)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
// Prevent the screen from being dimmed to avoid interuppting the AR experience.
UIApplication.shared.isIdleTimerDisabled = true
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
arView?.session.pause()
}
func addScene()
{
guard let anchor = try? ExperienciaCasa.loadMenu() else { return }
anchor.generateCollisionShapes(recursive: true)
arView.scene.addAnchor(anchor)
}
}
I am using PopupDialog which is a subclass of UIViewController and would like to force the rotation of just this view upon popup.
here is an example of what I would like to do:
import UIKit
import PopupDialog
class TestViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
func presentpopup() {
let popup = PopupDialog(title: "Title", message: "My message", image: nil)
let buttonOne = CancelButton(title: "cancel") {}
let buttonTwo = DefaultButton(title: "go to settings", dismissOnTap: false){
print("pressed")
}
//****** Here is where I would like to rotate the entire view***/////
popup.addButtons([buttonOne, buttonTwo])
self.present(popup, animated: true, completion: nil)
}
}
What I would like is something along the line of popup.rotate(.pi/2). Is this possible? I can't Seem to figure out how.
popup.view.transform = CGAffineTransform(rotationAngle: -.pi/2)
This rotates the view 90 degrees. it can be applied to any view.
I have a main view controller and pop up controller.Please refer screen shots.
Code :
#IBAction func show(sender: AnyObject) {
var popView = popupviewcontroller(nibName:"popview",bundle:nil)
var popController = UIPopoverController(contentViewController: popView)
popController.popoverContentSize = CGSize(width: 450, height: 450)
popController.presentPopoverFromRect(sender.frame, inView: self.view, permittedArrowDirections: UIPopoverArrowDirection.Down, animated: true)
}
For the popupViewcontoller i used .xib.
When press save button data saved to core data.
Lets come to my problem, in my mainViewController i fetched data and fill them in dynamically created lables.That occurred when view load.I want to reload mainViewController when close button form popViewController pressed.
I tried within the close button my code are here, i just tried to reload the mainVc :
var mainVC = mainviewcontroller()
#IBAction func close(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
//mainVc.viewDidLoad()
mainVC.reloadInputViews()
}
Does not give output.
Conclusion : I want a way to refresh view controller from another view in swift.
Thanks in advance.
Using UITableView only we can reload the data!,So we have to use table view custom cell textfield or Label. Now we can able to reload our custom textfield data.
Does your main ViewController use a UITableView?
You can use viewWillAppear and get the data again and use tableView.reloadData() to reload the data.
EDIT:
with var mainVC = mainviewcontroller() you're just making a new instance of your MainViewController. If you want to use reloadInputViews(), you can put it in viewWillLoad.
You should use protocol for it. You can read more about protocols here https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/Protocols.html
You can make protocol in PopViewController
protocol PopViewControllerProtocol {
static var valuesChanged()
}
Later you should implement this protocol in MainViewController and refresh data.
Example:
File UIPopoverController.swift
protocol UIPopoverControllerDelegate{
func valuesChanged(changedValue:String)
}
class UIPopoverController: UIViewController {
var delegate: UIPopoverControllerDelegate! = nil
#IBAction func close(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
//mainVc.viewDidLoad()
mainVC.valuesChanged("some value")
}}
File MainViewController.swift
class MainViewController: UIViewController, UIPopoverControllerDelegate
{
func valuesChanged(changedValue:String) {
//this will be called when popuviewcontroller call valueschanged on delegate object
}
#IBAction func show(sender: AnyObject) {
var popView = popupviewcontroller(nibName:"popview",bundle:nil)
var popController = UIPopoverController(contentViewController: popView)
popController.delegate = self;
popController.popoverContentSize = CGSize(width: 450, height: 450)
popController.presentPopoverFromRect(sender.frame, inView: self.view, permittedArrowDirections: UIPopoverArrowDirection.Down, animated: true)
}
}
With God Grace i found a solution that is , just create a Global variable
Var fetchedArray = Nsarray()
Then Write the following code in the popovoer controller save button
func save(){
// Write codes for saving data
let request = NSFetchRequest(entityName: "Enitity name")
request.returnsObjectsAsFaults = false
let Total = try? context.executeFetchRequest(request)
if let wrapResults = Total {
fetchedArray = wrapResults
}
}
Then fill the Labels by using fetchedArray.
Thanks
Swift 2, try
func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle
viewDidLoad()
return.None
Works for me