I am using SwiftUI to program a research kit app for personal use and I was wondering how to interact with Modal View opened Research Kit survey task.
I am using this code at the moment to open the view:
struct SurveyView: UIViewControllerRepresentable {
typealias UIViewControllerType = ORKTaskViewController
func makeUIViewController(context: Context) -> ORKTaskViewController {
let taskViewController = ORKTaskViewController(task: SurveyTask, taskRun: nil)
taskViewController.view.tintColor = UIColor(red:0.64, green:0.15, blue:0.11, alpha:1.00)
return taskViewController
}
func updateUIViewController(_ taskViewController: ORKTaskViewController, context: Context) {
}
}
I am using a button to call it, however I can't make it close with the cancel or done button in research kit as I am in the dark as to where I should implement the didFinishWithReason reason: ORKTaskViewControllerFinishReason.
Any help would be very much appreciated.
I have managed to do it using Coordinators. If anyone is interested, here is the code.
struct SurveyView: UIViewControllerRepresentable {
func makeCoordinator() -> Coordinator {
Coordinator()
}
typealias UIViewControllerType = ORKTaskViewController
func makeUIViewController(context: Context) -> ORKTaskViewController {
let taskViewController = ORKTaskViewController(task: SurveyTask, taskRun: nil)
taskViewController.view.tintColor = UIColor(red:0.64, green:0.15, blue:0.11, alpha:1.00)
taskViewController.delegate = context.coordinator
return taskViewController
}
func updateUIViewController(_ taskViewController: ORKTaskViewController, context: Context) {
}
class Coordinator: NSObject, ORKTaskViewControllerDelegate {
func taskViewController(_ taskViewController: ORKTaskViewController, didFinishWith reason: ORKTaskViewControllerFinishReason, error: Error?) {
taskViewController.dismiss(animated: true, completion: nil)
}
}
}
Related
I'm using Pulley a maps drawer library which is written in UIKit in a SwiftUI project. I have a SwiftUI ListView that I'm using in the project via a UIHostingController but I want to disable scrolling when the drawers position is not open and to do that I'm pretty sure I need to use one of the delegate functions Pulley provides (drawerPositionDidChange) but I'm not sure how to use the delegate in the Coordinator or if I should even try to use the delegate, maybe I just need to use some type of state variable?
Delegate in the view controller
#objc public protocol PulleyDelegate: AnyObject {
/** This is called after size changes, so if you care about the bottomSafeArea property for custom UI layout, you can use this value.
* NOTE: It's not called *during* the transition between sizes (such as in an animation coordinator), but rather after the resize is complete.
*/
#objc optional func drawerPositionDidChange(drawer: PulleyViewController, bottomSafeArea: CGFloat)
}
This is the UIViewRepresentable where I'm trying to use the delegate.
import SwiftUI
struct DrawerPosition: UIViewControllerRepresentable {
#Binding var bottomSafeArea: CGFloat?
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
func makeUIViewController(context: Context) -> some UIViewController {
let vc = PulleyViewController()
vc.delegate = context.coordinator
return vc
}
func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) {
// Updates the state of the specified view controller with new information from SwiftUI.
}
class Coordinator: NSObject, PulleyDrawerViewControllerDelegate {
var parent: DrawerPosition
init (_ parent: DrawerPosition) {
self.parent = parent
}
func drawerPositionDidChange(drawer: PulleyViewController, bottomSafeArea: CGFloat){
self.parent.bottomSafeArea = bottomSafeArea
}
}
}
the ListView where I want to disable the scroll.
import SwiftUI
struct ListView: View {
#State private var bottomSafeArea: CGFloat?
var body: some View {
ScrollViewReader { proxy in
VStack {
Button("Jump to #50") {
proxy.scrollTo(50)
}
List(0..<100, id: \.self) { i in
Text("Example")
.id(i)
}.scrollDisabled(bottomSafeArea == 0 ? true : false)
}
}
}
}
class ListViewVHC: UIHostingController<ListView> {
required init?(coder: NSCoder) {
super.init (coder: coder, rootView: ListView())
}
}
struct ListView_Previews: PreviewProvider {
static var previews: some View {
ListView()
}
}
Here is the correct way to set up a Coordinator:
func makeCoordinator() -> Coordinator {
Coordinator()
}
func makeUIViewController(context: Context) -> PullyViewController {
context.coordinator.pullyViewController
}
func updateUIViewController(_ uiViewController: PullyViewController, context: Context) {
// Updates the state of the specified view controller with new information from SwiftUI.
context.coordinator.bottomSafeAreaChanged = { bottomSafeArea in
self.bottomSafeArea = bottomSafeArea
}
}
class Coordinator: NSObject, PulleyDrawerViewControllerDelegate {
lazy var pullyViewController: PulleyViewController = {
let vc = PulleyViewController()
vc.delegate = self
return vc
}()
var bottomSafeAreaChanged: ((CGFloat) -> Void)?
func drawerPositionDidChange(drawer: PulleyViewController, bottomSafeArea: CGFloat){
bottomSafeAreaChanged?(bottomSafeArea)
}
Im trying to open New Contact screen in my SwiftUI app but Im not getting Save\Done button.I haven't seen anybody doing this I really don't know answer why as it seems easy at first. This is my current code.
struct ContactsVC: UIViewControllerRepresentable{
typealias UIViewControllerType = CNContactViewController
func makeUIViewController(context: Context) -> CNContactViewController {
let store = CNContactStore()
let con = CNContact()
let vc = CNContactViewController(forNewContact: con)
vc.contactStore = store
vc.delegate = context.coordinator
return vc
}
func updateUIViewController(_ uiViewController: CNContactViewController, context: Context) {
}
class Coordinator: NSObject,CNContactViewControllerDelegate,UINavigationControllerDelegate{
var parent: ContactsVC
init(_ parent: ContactsVC) {
self.parent = parent
}
func contactViewController(_ viewController: CNContactViewController, didCompleteWith contact: CNContact?) {
}
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
}
I have requested authorisation when sending contact now I want to add it.
I want to complete the addition of new payment method that I implemented in this SO question. This save and reuse stripe tutorial shows that cardParams and billingDetails need to be passed to STPPaymentMethodParams. How to I get the cardParams and billingDetails from STPPaymentOptionsViewController?
This is the code that produce the STPPaymentOptionsViewController and then display the STPAddCardViewController when add card button is pressed.
import Foundation
import SwiftUI
import Stripe
struct PaymentOptionsView: UIViewControllerRepresentable {
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
class Coordinator: NSObject, STPPaymentOptionsViewControllerDelegate {
var control: PaymentOptionsView
init(_ control: PaymentOptionsView) {
self.control = control
}
// Implement required delegate methods here:
func paymentOptionsViewControllerDidCancel(_ paymentOptionsViewController: STPPaymentOptionsViewController) {
}
func paymentOptionsViewControllerDidFinish(_ paymentOptionsViewController: STPPaymentOptionsViewController) {
}
func paymentOptionsViewController(_ paymentOptionsViewController: STPPaymentOptionsViewController, didFailToLoadWithError error: Error) {
}
}
func makeUIViewController(context: UIViewControllerRepresentableContext<PaymentOptionsView>) -> STPPaymentOptionsViewController {
let config = STPPaymentConfiguration()
// config.requiredBillingAddressFields = .none
config.appleMerchantIdentifier = "dummy-merchant-id"
return STPPaymentOptionsViewController(configuration: config, theme: STPTheme(), apiAdapter: STPCustomerContext(keyProvider: MyAPIClient()), delegate: context.coordinator)
}
func updateUIViewController(_ uiViewController: STPPaymentOptionsViewController, context: UIViewControllerRepresentableContext<PaymentOptionsView>) { }
}
STPPaymentOptionsViewController by design only returns you a PaymentMethod and not the raw card details.
Since the STPPaymentOptionsViewControllerDelegate returns you a STPPaymentOption, you can cast it to a STPPaymentMethod and then get the billingDetails for that PaymentMethod.
In your didSelect() delegate method, you can cast it like:
if let paymentMethod = paymentOption as? STPPaymentMethod {
print(paymentMethod.stripeId)
}
https://stripe.dev/stripe-ios/docs/Classes/STPPaymentMethod.html#/c:#M#Stripe#objc(cs)STPPaymentMethod(py)billingDetails
.sheet(isPresented: $showSheet) {
STPPaymentOptionsViewController()
}
I run this code hoping to present the Stripe Payment Options View Controller in my content view and I get this error:
Instance method sheet(isPresented:onDismiss:content:) requires that STPAddCardViewController conform to View
I also tried to wrap the view into a UIViewRepresentable like so:
struct PaymentOptionsView: UIViewRepresentable {
func makeUIView(context: Context) -> STPPaymentOptionsViewController {
let config = STPPaymentConfiguration()
config.additionalPaymentOptions = .default
config.requiredBillingAddressFields = .none
config.appleMerchantIdentifier = "dummy-merchant-id"
return STPPaymentOptionsViewController(configuration: config, e: STPTheme(), customerContext: STPCustomerContext(), delegate: self as! STPPaymentOptionsViewControllerDelegate)
}
}
Then I get the error:
Type CheckOut.PaymentOptionsView does not conform to protocol UIViewRepresentable.
Considering that STPPaymentOptionsViewController inherits from ViewController you need to use UIViewControllerRepresentable instead.
You also need to implement the required delegate methods for the STPPaymentOptionsViewControllerDelegate.
struct PaymentOptionsView: UIViewControllerRepresentable {
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
class Coordinator: NSObject, STPPaymentOptionsViewControllerDelegate {
var control: PaymentOptionsView
init(_ control: PaymentOptionsView) {
self.control = control
}
// Implement required delegate methods here:
func paymentOptionsViewControllerDidCancel(_ paymentOptionsViewController: STPPaymentOptionsViewController) {
}
func paymentOptionsViewControllerDidFinish(_ paymentOptionsViewController: STPPaymentOptionsViewController) {
}
func paymentOptionsViewController(_ paymentOptionsViewController: STPPaymentOptionsViewController, didFailToLoadWithError error: Error) {
}
}
func makeUIViewController(context: UIViewControllerRepresentableContext<PaymentOptionsView>) -> STPPaymentOptionsViewController {
let config = STPPaymentConfiguration()
config.additionalPaymentOptions = .default
config.requiredBillingAddressFields = .none
config.appleMerchantIdentifier = "dummy-merchant-id"
return STPPaymentOptionsViewController(configuration: config, theme: STPTheme(), apiAdapter: STPCustomerContext(), delegate: context.coordinator)
}
func updateUIViewController(_ uiViewController: STPPaymentOptionsViewController, context: UIViewControllerRepresentableContext<PaymentOptionsView>) { }
}
Keep in mind you're also setting the delegate in the STPPaymentOptionsViewController incorrectly. You need to use context.coordinator rather than self as! STPPaymentOptionsViewControllerDelegate.
When using VisionKit's VNDocumentCameraViewController for scanning documents the camera hangs after some seconds. The scan is implemented in a ViewController, which is used in SwiftUI.
The implementation of a DocumentScannerViewController:
import UIKit
import VisionKit
import SwiftUI
final class DocumentScannerViewController: UIViewController, VNDocumentCameraViewControllerDelegate, UIViewControllerRepresentable {
public typealias UIViewControllerType = DocumentScannerViewController
public func makeUIViewController(context: UIViewControllerRepresentableContext<DocumentScannerViewController>) -> DocumentScannerViewController {
return DocumentScannerViewController()
}
public func updateUIViewController(_ uiViewController: DocumentScannerViewController, context: UIViewControllerRepresentableContext<DocumentScannerViewController>) {
}
override func viewDidLoad() {
super.viewDidLoad()
let scannerViewController = VNDocumentCameraViewController()
scannerViewController.delegate = self as VNDocumentCameraViewControllerDelegate
view.addSubview(scannerViewController.view)
}
func documentCameraViewController(_ controller: VNDocumentCameraViewController, didFinishWith scan: VNDocumentCameraScan) {
}
func documentCameraViewControllerDidCancel(_ controller: VNDocumentCameraViewController) {
}
func documentCameraViewController(_ controller: VNDocumentCameraViewController, didFailWithError error: Error) {
}
}
And the implementation of the ContentView:
import SwiftUI
struct ContentView: View {
var body: some View {
DocumentScannerViewController()
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
The document scan camera launches and works for a short period of time. Then camera just stops moving.
Any idea what causes this behavior?
Apple does provide a way to use ViewControllers inside SwiftUI view with UIViewControllerRepresentable which you have to implement this way.
First declare your View as follows:
import SwiftUI
import UIKit
import Vision
import VisionKit
struct ScanningVNDocumentView: UIViewControllerRepresentable {
// implement your custom init() in case ..
typealias UIViewControllerType = VNDocumentCameraViewController
func makeUIViewController(context: UIViewControllerRepresentableContext<ScanningVNDocumentView>) -> VNDocumentCameraViewController {
let viewController = VNDocumentCameraViewController()
viewController.delegate = context.coordinator
return viewController
}
func updateUIViewController(_ uiViewController: VNDocumentCameraViewController, context: UIViewControllerRepresentableContext<ScanningVNDocumentView>) {
}
func makeCoordinator() -> Coordinator {
//Coordinator is Apple bridge between SwiftUI and ViewController
return Coordinator() `// this basically call init of the UIViewControllerRepresentable above`
}
final class Coordinator: NSObject, VNDocumentCameraViewControllerDelegate {
#Environment(\.presentationMode) var presentationMode
init() {
}
// implement VNDocumentCameraViewControllerDelegate methods where you can dismiss the ViewController
func documentCameraViewController(_ controller: VNDocumentCameraViewController, didFinishWith scan: VNDocumentCameraScan) {
print("user did press save with scanned docs numbers \(scan.pageCount) ")
}
func documentCameraViewControllerDidCancel(_ controller: VNDocumentCameraViewController) {
print("Did press cancel")
}
func documentCameraViewController(_ controller: VNDocumentCameraViewController, didFailWithError error: Error) {
print("Document camera view controller did finish with error ", error)
}
}
}
You can now call your view this way:
var body: some View {
ScanningVNDocumentView()
}