xcode - 类型 'ViewController' 不符合协议(protocol) 'UIDocumentPickerDelegate' swift 2

Question

类型“ViewController”不符合协议(protocol)“UIDocumentPickerDelegate”。我无法让 UIDocumentPickerDelegate 使其符合要求。有人可以帮助并解释我如何解决这个问题。 Swift 总是这样做。

import UIKit

class ViewController: UIViewController, UIDocumentPickerDelegate {

    @IBOutlet var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib. 
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func importFiles(sender: UIBarButtonItem) {

        var documentPicker: UIDocumentPickerViewController = UIDocumentPickerViewController(documentTypes: ["public.image"], inMode: UIDocumentPickerMode.Import)

        documentPicker.delgate = self

        documentPicker.modalPresentationStyle = UIModalPresentationStyle.FullScreen

        self.presentedViewController(documentPicker, animated: true, completion: nil)
    }

    func documentPicker(controller: UIDocumentPickerViewController, didPickDocumentAtUrl url: NSURL){

        if (controller.documentPickerMode == UIDocumentPickerMode.Import){

            self.imageView.image = UIImage(contentsOfFile: url.path!)
        }
    }
}

Answer 1

当我的部署目标是 iOS 7.1 时，我遇到了同样的编译错误。您收到此错误的原因可能是因为 UIDocumentPickerDelegate 仅适用于 iOS 8 及更高版本。您还拼错了委托(delegate)属性分配和 self.presentedViewController(documentPicker, animated: true, completion: nil)