ios - 在ViewController中实现ResearchKit进行调查

编辑：不确定这是否可能是我问题的根源，但是应用程序委托中的这段代码是否会导致此问题不起作用？

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.
    let navigationController = self.window!.rootViewController as! UINavigationController
    let controller = navigationController.topViewController as! HomeViewController
    controller.managedObjectContext = self.managedObjectContext
    return true

}

我正在尝试将调查功能添加到带有ResearchKit集成的应用程序中。我已经完成了安装指南和Ray Wenderlich的其他一些教程。但是，当我过渡到一个应用程序时，我想开发我会遇到一些困难。

我被抛出错误：Cannot assign value of type 'HomeviewController to type 'ORKTaskViewControllerDelegate?'

这是我正在使用的代码：

class HomeViewController: UIViewController {
var managedObjectContext: NSManagedObjectContext?

@IBAction func surveyTapped(sender: AnyObject) {

    let taskViewController = ORKTaskViewController(task: SurveyTask, taskRunUUID: nil)
    taskViewController.delegate = self
    presentViewController(taskViewController, animated: true, completion: nil)

}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.destinationViewController.isKindOfClass(NewRideViewController) {
        if let newRideViewController = segue.destinationViewController as? NewRideViewController {
            newRideViewController.managedObjectContext = managedObjectContext
        }
    }
}
}

基于与此错误语法相关的类似问题，用户添加了另一个控制器类，但是哪一个超出了我。非常感谢您的帮助，谢谢StackExchange！

最佳答案

看起来您尚未扩展视图控制器以实现ORKTaskViewController的委托，该委托是ORKTaskViewControllerDelegate，并且您的VC代码应如下所示-

import ResearchKit

class HomeVC: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    @IBAction func surveyTapped(sender: AnyObject) {
        let taskViewController = ORKTaskViewController(task: SurveyTask, taskRunUUID: nil)
        taskViewController.delegate = self
        presentViewController(taskViewController, animated: true, completion: nil)
    }

}

extension HomeVC: ORKTaskViewControllerDelegate {

    func taskViewController(taskViewController: ORKTaskViewController, didFinishWithReason reason: ORKTaskViewControllerFinishReason, error: NSError?) {

    }

}

关于ios - 在ViewController中实现ResearchKit进行调查，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/35591974/