Requiring consent before proceeding with survey in ResearchKit - ios

Question

I'm currently creating a program that wants to utilize ResearchKit. Before getting into survey questions, I will need to require consent. I am using the Ray Wenderlich (https://www.raywenderlich.com/1820-researchkit-tutorial-with-swift-getting-started) tutorial and have this code set up. I've already tried to go on with the survey part of my program, and I can access it without even going through consent.
import ResearchKit
public var ConsentTask: ORKOrderedTask {
var ctr = 0
let Document = ORKConsentDocument()
Document.title = "Consent"
//section types
let sectionTypes: [ORKConsentSectionType] = [
.overview,
.dataGathering,
.privacy
]
let consentSections: [ORKConsentSection] = sectionTypes.map { contentSectionType in
let consentSection = ORKConsentSection(type: contentSectionType)
if ctr < sectionTypes.count {
if ctr == 0 {
consentSection.summary = "Summary"
consentSection.content = "Content"
}
else if ctr == 1 { //Data Gathering
consentSection.summary = "Summary"
consentSection.content = "Content"
}
else if ctr == 2 { //Privacy
consentSection.summary = "Summary"
consentSection.content = "Content"
}
ctr = ctr + 1
}
return consentSection
}
Document.sections = consentSections
Document.addSignature(ORKConsentSignature(forPersonWithTitle: nil, dateFormatString: nil, identifier: "UserSignature"))
var steps = [ORKStep]()
let visualConsentStep = ORKVisualConsentStep(identifier: "VisualConsent", document: Document)
steps += [visualConsentStep]
let signature = Document.signatures!.first! as ORKConsentSignature
let reviewConsentStep = ORKConsentReviewStep(identifier: "Review", signature: signature, in: Document)
reviewConsentStep.text = "Review the consent"
reviewConsentStep.reasonForConsent = "I agree"
steps += [reviewConsentStep]
//Completion
let completionStep = ORKCompletionStep(identifier: "CompletionStep")
completionStep.title = "Welcome"
completionStep.text = "Thank you for helping!"
steps += [completionStep]
return ORKOrderedTask(identifier: "ConsentTask", steps: steps)
}
And in my view controller, I have
#IBAction func consentTask(_ sender: Any) {
if consentDone == false {
let taskViewController = ORKTaskViewController(task: ConsentTask, taskRun: nil)
taskViewController.delegate = self
present(taskViewController, animated: true, completion: nil)
}
else if consentDone == true {
//would they like to leave the study
}
}
With my efforts of putting a consentDone flag here.
func taskViewController(_ taskViewController: ORKTaskViewController, didFinishWith reason: ORKTaskViewControllerFinishReason, error: Error?) {
taskViewController.dismiss(animated: true, completion: {() in self.consentDone = true})
print(consentDone)
}
However, what happens is that if the user presses cancel on the top right or done at the very end of the consent, it will trigger this always. Is there a way to be able to make sure that a block of code is executed only after everything is finished? Ideally, after this, I would like to make this a flag that the user has already finished the consent. I will redirect the user to a different page every time afterwards until the user leaves the study.

Answer 1

After some trial and error, I found the answer here: https://github.com/ResearchKit/ResearchKit/issues/919
By knowing that the signature of the user means that the user has finished the form, we can do
if result.identifier == "UserSignature"{
print(result)
let consentDoneAnswerResult = result as! ORKConsentSignatureResult
let consentDone = consentDoneAnswerResult.consented
print(consentDone)
}
And this gives consentDone as true when the form is done, not canceled.