Question

我将如何选择多张图像并使用共享选项调出视图或将其从收藏夹视图中删除？我对编程还比较陌生，如果有人有解决方案或知道一种更好的方法来进行编程，请回答，因为这样做会大大有益。谢谢。

class ViewController: UICollectionViewController, UIImagePickerControllerDelehye5gate, UINavigationControllerDelegate, UICollectionViewDelegateFlowLayout {
    @IBOutlet weak var imageViewTwo: UIImageView!

    var imageArray = [UIImage]()

    override func viewDidLoad() {
        super.viewDidLoad()
        imageViewTwo.isHidden = true
    }

    @IBAction func chooseImage(_ sender: UIBarButtonItem) {
        let imagePickerController = UIImagePickerController()
        imagePickerController.delegate = self

        let actionSheet = UIAlertController(title: "Photo Source", message: "Choose a Source", preferredStyle: .actionSheet)

        actionSheet.addAction(UIAlertAction(title: "Camera", style: .default, handler: { (action: UIAlertAction) in
            if UIImagePickerController.isSourceTypeAvailable(.camera) {
                imagePickerController.sourceType = .camera
                self.present(imagePickerController, animated: true, completion: nil)
            } else {
                print("Camera is not available.")
            }
        }))

        actionSheet.addAction(UIAlertAction(title: "Photo Library", style: .default, handler: { (action: UIAlertAction) in
            imagePickerController.sourceType = .photoLibrary
            self.present(imagePickerController, animated: true, completion: nil)
        }))

        actionSheet.addAction(UIAlertAction(title: "Cancel", style: .default, handler: nil))

        self.present(actionSheet, animated: true, completion: nil)
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage

        imageViewTwo.image = image
        imageArray.append(imageViewTwo.image!)
        collectionView.reloadData()

        picker.dismiss(animated: true, completion: nil)
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        picker.dismiss(animated: true, completion: nil)
    }

    override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return imageArray.count
    }

    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath)

        let imageView = cell.viewWithTag(1) as! UIImageView
        imageView.image = imageArray[indexPath.row]
        return cell
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let width = collectionView.frame.width / 3 - 1

        return CGSize(width: width, height: width)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        return 1.0
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
        return 1.0
    }
}

Answer 1

在您的cellForItemAt

override func collectionView(_ collectionView: UICollectionView, cellForItemAt 
    indexPath: IndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath)

    let imageView = cell.viewWithTag(1) as! UIImageView
    imageArray.append(imageViewTwo.image!)
    imageView.image = imageArray[indexPath.row]
    return cell
}

您有这行

imageArray.append(imageViewTwo.image!)

这会将多余的图像添加到数组中，您已经通过didFinishPickingMediaWithInfo方法将图像添加到了该数组中，这导致了重复。

在收藏夹视图中选择和删除图像

1 个答案: