ios - 如何从 iCarousel 中删除视图并重新加载数据

Question

我对 IOS 开发比较陌生，我已经在我的一个 ViewController 中实现了 iCarousel。我正在通过字符串数组传递一些数据，当我单击 carouselView 上的按钮时，它应该打开照片库。从照片库中选择图像后，我想从数组中删除该值并删除 iCarousel 卡的该实例。

我环顾四周，只在 obj-c 中找到代码，但我使用的是 Swift。

我附上了一张 iCarousel 的图片。当我单击相机按钮时，它会将我带到照片库，但是一旦我选择了照片，我希望删除轮播卡的那个实例。 视图控制器图像

这是我目前在 ViewController 中用于 iCarousel 的代码

    class ChallengesViewController: UIViewController, TabItem, iCarouselDelegate, iCarouselDataSource {
    var tabImage: UIImage?
    
   
    var image:UIImage? =  imageLiteral(resourceName: "camera")

    var masterchallengeList = [String]()
    var masterSubtitles = [String]()
    var weeklySelect = [String]()
    var weeklySubtitleSelect = [String]()
    
    enum StorageType {
        case userDefaults
        case fileSystem
    }
    
    @IBOutlet weak var carouselView: iCarousel!
    
    
    override func awakeFromNib() {
        masterchallengeList = [“A “, “B”, “C”, “D”, “E”, F”, “G”]
        
        masterSubtitles = [“A “, “B”, “C”, “D”, “E”, F”, “G”]


        weeklySelect = ["","","","","","",""]
        weeklySubtitleSelect = ["","","","","","",""]

        
        for n in 0...(weeklySelect.count - 1){
            weeklySelect[n] = masterchallengeList[n]
        }
        for n in 0...(weeklySubtitleSelect.count - 1){
            weeklySubtitleSelect[n] = masterSubtitles[n]
         }
    }


    @objc func didTapCameraImage() {
        
        presentPhotoActionSheet()
        
    }


    override func viewDidLoad() {
        super.viewDidLoad()
        
        carouselView.type = .coverFlow
        
        navigationController?.navigationBar.largeTitleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
        navigationItem.titleView?.tintColor = UIColor.init(red: 3, green: 25, blue: 82, alpha: 1.0)
        navigationController?.navigationBar.prefersLargeTitles = true
        navigationItem.title = "Challenges"
        
        
   
    }
    

    func numberOfItems(in carousel: iCarousel) -> Int {
        return weeklySelect.count
    }
    
    
    
    func carousel(_ carousel: iCarousel, viewForItemAt index: Int, reusing view: UIView?) -> UIView {
         let tempView = UIView(frame: CGRect(x: 0, y: 0, width: 250, height: 350))
        
        
          let lightBlue = UIColor.init(red: 94, green: 122, blue: 255, alpha: 1.0)
        
        
           tempView.clipsToBounds  = true
           tempView.translatesAutoresizingMaskIntoConstraints = true
           tempView.layer.cornerRadius = 25.0

            

        
        let actionLabel = UILabel(frame: CGRect(x: 20, y: 0, width: 200, height: 150))
        actionLabel.numberOfLines = 0
        actionLabel.font = actionLabel.font.withSize(25.0)
        actionLabel.textColor = UIColor.white
        actionLabel.text = weeklySelect[index]
        tempView.addSubview(actionLabel)
        
        let subtitleLabel = UILabel(frame: CGRect(x: 20, y: -30, width: 200, height: 150))
        subtitleLabel.center.y = tempView.center.y
        subtitleLabel.numberOfLines = 0
        subtitleLabel.font = actionLabel.font.withSize(14)
        subtitleLabel.textColor = UIColor.white
        subtitleLabel.text = weeklySubtitleSelect[index]
        tempView.addSubview(subtitleLabel)

        
        let photoButton = UIButton(frame: CGRect(x: 0, y: 0, width: 30, height: 30))
        photoButton.center.x = tempView.center.x
        photoButton.center.y = tempView.center.y + 92.5
        photoButton.setImage(image, for: .normal)
        photoButton.setImage( imageLiteral(resourceName: "camera"), for: .normal)
        let gesture = UITapGestureRecognizer(target: self,
                                             action:#selector(didTapProfilePic))
        photoButton.addGestureRecognizer(gesture)
        
        tempView.addSubview(photoButton)
        
        return tempView

    }
    
       func carousel(_ carousel: iCarousel, valueFor option: iCarouselOption, withDefault value: CGFloat) -> CGFloat {
       
       if option == iCarouselOption.spacing{
        return value * 2
       }
       

       
       return value
      }
    
    

       }


    extension ChallengesViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate{
    

   
    func presentPhotoActionSheet() {
        let actionSheet = UIAlertController(title: "Profile Picture", message: "How would you like to select a profile picture", preferredStyle: .actionSheet)
        
        actionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
        actionSheet.addAction(UIAlertAction(title: "Take Photo", style: .default, handler: { [weak self] _ in
            self?.presentCamera()
        }))
        actionSheet.addAction(UIAlertAction(title: "Choose Photo", style: .default, handler: { [weak self] _ in
            self?.presentPhotoPicker()
        }))
        
        present(actionSheet, animated: true)
    }
    func presentCamera() {
        let vc = UIImagePickerController()
        vc.sourceType = .camera
        vc.delegate = self
        vc.allowsEditing = true
        present(vc, animated: true)
        
    }
    func presentPhotoPicker(){
        
        let vc = UIImagePickerController()
        vc.sourceType = .photoLibrary
        vc.delegate = self
        vc.allowsEditing = true
        present(vc, animated: true)
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        picker.dismiss(animated: true, completion: nil)
        
        guard let selectedImage =  info[UIImagePickerController.InfoKey.editedImage] as? UIImage else{
            return}
        image = selectedImage
      
        }
    

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        picker.dismiss(animated: true, completion: nil)
    }
    override func present(_ viewControllerToPresent: UIViewController,
                                   animated flag: Bool,
                                   completion: (() -> Void)? = nil) {
               viewControllerToPresent.modalPresentationStyle = .fullScreen
               super.present(viewControllerToPresent, animated: flag, completion: completion)
             }
    
    @objc func dismissAlert(){
        customAlert.dismissAlert()      }
}

标签： iosarraysswifticarousel

Answer 1

如果你只想隐藏它 iCarousel

carouselView.isHidden = true

但是，如果你想将其从其中删除，superView你必须这样做

carouselView.removeFromSuperView()

这条线从中删除carouselView它superView所以在这种情况下它self.view

也许你不想carouselView在删除之后使用superView. 在这种情况下，您可以选择；

carouselView = nil

所以用

carouselView.removeFromSuperView()
carouselView = nil



weeklySelect.remove(at: selectedRowIndex)