经过一定时间后，如何在swift2中的xcode上关闭相机界面并打开其他视图控制器？

Question

So I have a button in the initial control view which takes the user to the camera interface. The user goes back to the initial view controller after taking a photo but how do I make the app close the camera and return to the initial page or a different page after a certain time period if the user doesn't take a picture.

import UIKit

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {


@IBOutlet weak var CameraButton: UIButton!

@IBOutlet weak var photoLibrary: UIButton!

@IBOutlet weak var imageView: UIImageView!


@IBAction func cameraAction(sender: UIButton) {

    let picker = UIImagePickerController()
    picker.delegate = self
    picker.sourceType = .Camera

    presentViewController(picker, animated: true, completion: nil)

}


@IBAction func photoLibraryAction(sender: AnyObject) {

    let picker = UIImagePickerController()
    picker.delegate = self
    picker.sourceType = .PhotoLibrary

    presentViewController(picker, animated: true, completion: nil)
}


func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    imageView.image = info [UIImagePickerControllerOriginalImage] as? UIImage;
    dismissViewControllerAnimated(true, completion: nil)
}




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.
}

}

Answer 1

1. Create a NSTimer that gets started when you present the image picker. Set your desired waiting time.

2. Then, in timer fire method dismiss the image picker.

3. If user dismisses the image picker before the timer fires, invalidate the timer in didFinishPickingMediaWithInfo