ios - ViewController 中的 Swift 错误 "Use of undeclared type"

Question

我正在开发一款在 Xcode 上使用 ResearchKit 和 Swift 的应用程序。 ResearchKit 软件相对简单，但 View Controller 中的这段代码有以下信息:

"Use of undeclared type"

对于所有三种 ORKTaskViewControllerXXX 类型，我不确定如何修复它。这是我的代码:

import UIKit

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

extension ViewController : ORKTaskViewControllerDelegate {
    func taskViewController(taskViewController: ORKTaskViewController, didFinishWithReason reason: ORKTaskViewControllerFinishReason, error: NSError?) {
        //Handle results with taskViewController.result
        taskViewController.dismissViewControllerAnimated(true, completion: nil)
    }
}

Answer 1

尝试在您调用ResearchKit 相关内容的 View Controller 中添加import ResearchKit。

import UIKit
import ResearchKit