具有多个 imageView 输出的 iOS 相机

Question

在我的 FirstVC 中，我了解如何使用 UIImagePickerController、加载相机、拍照、在 1 个 imageView 内显示它(仍在 FirstVC 内)，然后通过prepareForSegue 将该图像传递到 SecondVC 内的 imageView 进行显示那边。

我需要帮助的是在 FirstVC 中有多个 imageView，这样一旦用户拍摄第一张图片，它就会加载到第一个 imageView，然后第二张图片加载到第二个 imageView，第三张图片加载到第三个 imageView，第四张图片加载到第四个 imageView。之后会出现一条警告，提示用户无法再拍摄照片，并且用户可以按 nextSceneButton 进入 SecondVC，SecondVC 将显示他们刚刚拍摄的 4 张选定图像。

我一直使用 UIImagePickerController，但我刚刚熟悉 AVFoundation。我应该使用 AVFoundation 还是 UIImagePicker 来完成此任务？

这是我的 UIImagePickerController 代码，FirstVC 中只有一个 imageView:

import UIKit

class FirstViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var nextSceneButton: UIButton!
//nextSceneButton is connected in StoryBoards and triggers the segue to the SecondVC


let imagePicker = UIImagePickerController()

var image: UIImage?



  //MARK:- Custom Function
func noCamera(){
        let alertVC = UIAlertController(title: "No Camera", message: "Sorry, this device has no camera", preferredStyle: .Alert)
        let okAction = UIAlertAction(title: "OK", style:.Default, handler: nil)
        alertVC.addAction(okAction)
        presentViewController(alertVC, animated: true, completion: nil)
    }


override func viewDidLoad() {
        super.viewDidLoad()
        imagePicker.delegate = self      
    }


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

  //MARK:- Buttons

@IBAction func libraryButtonPressed(sender: UIButton) {
        imagePicker.allowsEditing = false
        imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
        presentViewController(imagePicker, animated: true, completion: nil)
    }


@IBAction func photoButtonPressed(sender: UIButton) {

    if (UIImagePickerController.availableCaptureModesForCameraDevice(UIImagePickerControllerCameraDevice.Rear) != nil){
            imagePicker.allowsEditing = false
            imagePicker.sourceType = UIImagePickerControllerSourceType.Camera
            imagePicker.cameraCaptureMode = UIImagePickerControllerCameraCaptureMode.Photo
            imagePicker.cameraDevice = UIImagePickerControllerCameraDevice.Rear
            presentViewController(imagePicker, animated: true, completion: nil)
        }else{
                noCamera()
    }
     }


  //MARK:- ImagePickerController Delegates

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


func imagePickerControllerDidCancel(picker: UIImagePickerController) {
            picker.dismissViewControllerAnimated(true, completion: nil)
     }


  //MARK:- Segue

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == “fromPhotoVcToSecondVC” {
        let secondVC = segue.destinationViewController as! SecondViewController
        secondVC.image = self.image
        }
     }

}//end class

Answer 1

您可以添加一个计数属性并将图像保存在一个数组中:

var count = 0
var imageViews:[UIImageView]

每次你拍照并调用委托(delegate)时加载相应的 ImageView :

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
        let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
        self.imageViews[count].image = chosenImage
        count +=1
        dismissViewControllerAnimated(true, completion: nil)
 }

然后，如果所有照片都已拍摄，则提醒用户:

@IBAction func photoButtonPressed(sender: UIButton) {
      if count < imageViews.count {
          //present UiimagePicker
      } else {
          // alert no more pictures allowed
      }
}