使用for循環將UIImage附加到數組中

Question

我目前正在研究一個允許用戶拍攝多個圖像的應用程序，並將它顯示在iCarousel上。我不是很強大，所以我不知道該怎麼做。我的問題是，「如何在用戶拍照後添加並顯示圖像？」我只允許最多3張照片。這裏是我下面的代碼：

var imageArray : NSMutableArray = NSMutableArray() 

@IBOutlet weak var displayView: iCarousel! 

override func viewDidLoad() { 
    super.viewDidLoad() 

    imageArray = ["1.jpg", "2.jpg", "3.jpg"] 

    displayView.type = iCarouselType.coverFlow2 

    displayView.reloadData() 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 

} 


func carousel(_ carousel: iCarousel, viewForItemAt index: Int, reusing view: UIView?) -> UIView { 

    var imgView : UIImageView! 

    let tapGesture = UITapGestureRecognizer(target: self, action: #selector(imageTapped)) 

    //let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.imageTapped(_:))) 

    if view == nil { 
     imgView = UIImageView(frame: CGRect(x: 0, y:0, width: 250, height: 250)) 
     imgView.contentMode = .scaleAspectFit 
    } 
    else 
    { 
     imgView = view as! UIImageView 
    } 

    imgView.image = UIImage(named:"\(imageArray.object(at: index))") 

    imgView.addGestureRecognizer(tapGesture) 

    tapGesture.numberOfTapsRequired = 1 

    imgView.isUserInteractionEnabled = true 

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
     if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage { 
      imgView.contentMode = .scaleToFill 
      imgView.image = pickedImage 
     } 
     picker.dismiss(animated: true, completion: nil) 
    } 

    return imgView 
} 

func carousel(_ carousel: iCarousel, valueFor option: iCarouselOption, withDefault value: CGFloat) -> CGFloat { 

    if (option == .spacing) 
    { 
     return value * 1.8 
    } 
    return value 
} 

func numberOfItems(in carousel: iCarousel) -> Int { 
    return imageArray.count 
} 

func imageTapped(_ sender: UITapGestureRecognizer) 
{ 
    let alert = UIAlertController(title: "Pick Image Source", message: "", preferredStyle: .alert) 

    let takePhotoBtn = UIAlertAction(title: "Take Photo", style: .default, handler: {(_ action: UIAlertAction) -> Void in 

     if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera) { 
      let imagePicker = UIImagePickerController() 
      imagePicker.delegate = self 
      imagePicker.sourceType = UIImagePickerControllerSourceType.camera 
      imagePicker.allowsEditing = false 
      self.present(imagePicker, animated: true, completion: nil) 
     } 
    }) 

    let galleryBtn = UIAlertAction(title: "Select from Gallery", style: .default, handler: {(_ action: UIAlertAction) -> Void in 

     if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary) 
     { 
      let imagePicker = UIImagePickerController() 
      imagePicker.delegate = self 
      imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary 
      imagePicker.allowsEditing = false 
      self.present(imagePicker, animated: true, completion: nil) 
      imagePicker.mediaTypes = ["public.image", "public.movie"] //Remove public.movie later 
     } 
    }) 

    let cancelBtn = UIAlertAction(title: "Cancel", style: .default, handler: {(_ action: UIAlertAction) -> Void in 
     // print("Cancel") 
    }) 

    alert.addAction(takePhotoBtn) 
    alert.addAction(galleryBtn) 
    alert.addAction(cancelBtn) 

    present(alert, animated: true, completion: { _ in }) 
} 

Answer 1

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
if imageArray.count == 3{ 
    return //you can jump to Show the Carousel here 
} 
    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage { 
     imgView.contentMode = .scaleToFill 
     imgView.image = pickedImage 
     // Add image to Array Here 
     imageArray.add(image) 

    } 
    // you can also show refresh carousel from here so new image is availabe in carousel 
    picker.dismiss(animated: true, completion: nil) 

} 

如果您允許最多3幅圖像，那麼你也可以寫檢查條件imageTapped功能。

Answer 2

請檢查下面的代碼：

class ViewController: UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate,iCarouselDelegate,iCarouselDataSource { 

    var imageArray : NSMutableArray = NSMutableArray() 
    var selectedImageView : UIImageView! = nil 

    @IBOutlet weak var displayView: iCarousel! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     for i in 1...3 
     { 
      var imgView : UIImageView! 
      imgView = UIImageView(frame: CGRect(x: 0, y:0, width: 250, height: 250)) 
      imgView.contentMode = .scaleAspectFit 
      imgView.tag = i 
      imgView.image = UIImage(named: "\(i).png") 
      imgView.backgroundColor = UIColor.gray 
      imageArray.add(imgView) 
     } 

     displayView.type = iCarouselType.coverFlow2 
     displayView.reloadData() 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 

    } 


    func carousel(_ carousel: iCarousel, viewForItemAt index: Int, reusing view: UIView?) -> UIView { 

     var imgView : UIImageView! 

     let tapGesture = UITapGestureRecognizer(target: self, action: #selector(imageTapped)) 


     imgView = imageArray.object(at: index) as? UIImageView 

     imgView.addGestureRecognizer(tapGesture) 

     tapGesture.numberOfTapsRequired = 1 

     imgView.isUserInteractionEnabled = true 

     func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
      if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage { 
       imgView.contentMode = .scaleToFill 
       imgView.image = pickedImage 
      } 
      picker.dismiss(animated: true, completion: nil) 
     } 

     return imgView 
    } 

    func carousel(_ carousel: iCarousel, valueFor option: iCarouselOption, withDefault value: CGFloat) -> CGFloat { 

     if (option == .spacing) 
     { 
      return value * 1.8 
     } 
     return value 
    } 

    func numberOfItems(in carousel: iCarousel) -> Int { 
     return imageArray.count 
    } 

    func imageTapped(_ sender: UITapGestureRecognizer) 
    { 

     self.selectedImageView = sender.view as? UIImageView 

     let alert = UIAlertController(title: "Pick Image Source", message: "", preferredStyle: .alert) 

     let takePhotoBtn = UIAlertAction(title: "Take Photo", style: .default, handler: {(_ action: UIAlertAction) -> Void in 

      if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera) { 
       let imagePicker = UIImagePickerController() 
       imagePicker.delegate = self 
       imagePicker.sourceType = UIImagePickerControllerSourceType.camera 
       imagePicker.allowsEditing = false 
       self.present(imagePicker, animated: true, completion: nil) 
      } 
     }) 

     let galleryBtn = UIAlertAction(title: "Select from Gallery", style: .default, handler: {(_ action: UIAlertAction) -> Void in 

      if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary) 
      { 
       let imagePicker = UIImagePickerController() 
       imagePicker.delegate = self 
       imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary 
       imagePicker.allowsEditing = false 
       self.present(imagePicker, animated: true, completion: nil) 
      } 
     }) 

     let cancelBtn = UIAlertAction(title: "Cancel", style: .default, handler: {(_ action: UIAlertAction) -> Void in 
      // print("Cancel") 
     }) 

     alert.addAction(takePhotoBtn) 
     alert.addAction(galleryBtn) 
     alert.addAction(cancelBtn) 

     present(alert, animated: true, completion: { _ in }) 
    } 

    public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) 
    { 
     let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage 

     self.selectedImageView.image = chosenImage 

     imageArray.replaceObject(at: self.selectedImageView.tag-1, with: self.selectedImageView) 


     displayView.reloadData() 

     dismiss(animated:true, completion: nil) 
    } 

}