使用ORKTaskViewController以编程方式显示ResearchKit

Question

我从最新发布的ResearchKit下载了GitHub，并将框架嵌入到我的项目中。

使用雷·温德利希ResearchKit教程，我创建了一个调查任务：

import ResearchKit

public var SurveyTask: ORKOrderedTask {

    var steps = [ORKStep]()

    let instructionStep = ORKInstructionStep(identifier: "IntroStep")
    instructionStep.title = "The Questions Three"
    instructionStep.text = "Who would cross the Bridge of Death must answer me these questions three, ere the other side they see."
    steps += [instructionStep]

    let nameAnswerFormat = ORKTextAnswerFormat(maximumLength: 20)
    nameAnswerFormat.multipleLines = false
    let nameQuestionStepTitle = "What is your name?"
    let nameQuestionStep = ORKQuestionStep(identifier: "QuestionStep", title: nameQuestionStepTitle, question: "Hello?", answer: nameAnswerFormat)
    steps += [nameQuestionStep]

    let questQuestionStepTitle = "What is your quest?"
    let textChoices = [
      ORKTextChoice(text: "Create a ResearchKit App", value: 0 as NSNumber),
      ORKTextChoice(text: "Seek the Holy Grail", value: 1 as NSNumber),
      ORKTextChoice(text: "Find a shrubbery", value: 2 as NSNumber)
    ]
    let questAnswerFormat: ORKTextChoiceAnswerFormat = ORKAnswerFormat.choiceAnswerFormat(with: .singleChoice, textChoices: textChoices)
    let questQuestionStep = ORKQuestionStep(identifier: "TextChoiceQuestionStep", title: questQuestionStepTitle, question: "Hello?", answer: questAnswerFormat)
    steps += [questQuestionStep]

    let summaryStep = ORKCompletionStep(identifier: "SummaryStep")
    summaryStep.title = "Right. Off you go!"
    summaryStep.text = "That was easy!"
    steps += [summaryStep]

    return ORKOrderedTask(identifier: "SurveyTask", steps: steps)
}

我的ViewController中的委托设置如下：

extension ViewController: ORKTaskViewControllerDelegate {

    func taskViewController(_ taskViewController: ORKTaskViewController, didFinishWith reason: ORKTaskViewControllerFinishReason, error: Error?) {
        taskViewController.dismiss(animated: true, completion: nil)
    }

}

然后在那个ViewController里，我试着展示ORKTaskViewController

@objc func showSurvey() {
    let taskViewController = ORKTaskViewController(task: SurveyTask, taskRun: nil)
    taskViewController.delegate = self
    self.present(taskViewController, animated: true, completion: nil)
}

我一直得到libc++abi.dylib: terminating with uncaught exception of type NSException，但我不太清楚为什么。我不使用故事板，但我不明白为什么没有故事板我就不能使用ResearchKit。我已经尝试过寻找故事板的实现，但我能找到的最接近的是这，它仍然使用故事板。任何帮助都将不胜感激。

Answer 1

在添加了一个异常断点之后，我发现它与_appTintColor库中的ResearchKit有关。

ORKNavigationContainerView.m中的这一行代码

_appTintColor = [[UIApplication sharedApplication].delegate window].tintColor;

没有工作，我认为这是因为SceneDelegate.swift是在iOS 13中引入的，我在这里以编程方式设置窗口和根视图控制器(而不是在AppDelegate中这样做)。

如果您将其更改为这样的内容：

if (@available(iOS 13.0, *)) {
    _appTintColor = [self window] .tintColor;
    // not sure if it's this or [[self window].windowScene windows].firstObject .tintColor;
} else {
    _appTintColor = [[UIApplication sharedApplication].delegate window].tintColor;
}

那就应该管用了。我不熟悉Obj，但我试图获得实例化新视图控制器的视图窗口，它似乎可以工作(请随意编辑)。