Wenn Benutzer erlauben, Foto zu verwenden, kann ich keine Sache in swift sehen 3

Question

Ich habe Sammlungsansicht mit Bildern der Fotobibliothek Aber es gibt ein Problem nur zum ersten Mal, dass Benutzer die Verwendung von Fotos ermöglicht - wenn die App zum ersten Mal ausgeführt wird und Benutzer können Fotos um den Benutzer verwenden, kann nicht anyImages sehen und sollte diese Ansicht Controller entlassen und wieder kommen, um zu sehen, die Bilder

hier ist der Codes:

import UIKit 
import Photos 

class typeandtranslateViewController: UIViewController , UIImagePickerControllerDelegate , UINavigationControllerDelegate , UICollectionViewDelegate, UICollectionViewDataSource , UITextFieldDelegate { 


static var checkTextField = Bool() 

@IBOutlet var backgroundimg: UIImageView! 
@IBOutlet var frontimg: UIImageView! 
@IBOutlet weak var typeView: UIView! 

let arr_img = NSMutableArray() 
let arr_selected = NSMutableArray() 

@IBOutlet var collview: UICollectionView! 


@IBOutlet weak var sefareshTitleTextField: UITextField! 


@IBAction func caneraButton(_ sender: UIButton) { 

    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) 
    } 

    print("Camera!") 


} 
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 

    let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage 

    UIImageWriteToSavedPhotosAlbum(selectedImage,self,nil,nil) 

    dismiss(animated: true, completion: nil) 

    print("save Image ") 



} 
@IBOutlet weak var viewCamera: UIView! 
override func viewDidLoad() { 
    super.viewDidLoad() 



    print("Text Field Condition ") 

    if sefareshTitleTextField!.text! == "" { 

     typeandtranslateViewController.checkTextField = false 


     print("sefaresh title is nill") 
    } else if sefareshTitleTextField!.text! != "" { 


     typeandtranslateViewController.checkTextField = true 
     print("sefaresh title isnt nill") 

    } 

    self.sefareshTitleTextField.delegate = self 


    collview?.allowsMultipleSelection = true 

    let allPhotosOptions : PHFetchOptions = PHFetchOptions.init() 
    allPhotosOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: true)] 
    let allPhotosResult = PHAsset.fetchAssets(with: .image, options: allPhotosOptions) 
    allPhotosResult.enumerateObjects({ (asset, idx, stop) in 

     self.arr_img.add(asset) 

    }) 


    self.typeView.layer.cornerRadius = self.typeView.frame.size.height/50 
    self.typeView.layer.borderWidth = 1 
    self.typeView.layer.borderColor = UIColor.clear.cgColor 
    self.typeView.clipsToBounds = true 


    self.viewCamera.layer.cornerRadius = 5 
    self.viewCamera.layer.borderWidth = 1 
    self.viewCamera.layer.borderColor = UIColor.clear.cgColor 
    self.viewCamera.clipsToBounds = true 


    self.tabBarController?.tabBar.isHidden = true 
    self.navigationController?.isNavigationBarHidden = true 


    let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.light) 
    let blurView = UIVisualEffectView(effect: blurEffect) 

    blurView.frame = CGRect(x: self.backgroundimg.frame.origin.x, y: self.backgroundimg.frame.origin.y, width: self.backgroundimg.frame.size.width, height: self.backgroundimg.frame.size.height) 

    blurView.autoresizingMask = [.flexibleWidth, .flexibleHeight] 

    self.backgroundimg.addSubview(blurView) 

} 

func getAssetThumbnail(asset: PHAsset, size: CGFloat) -> UIImage { 
    let retinaScale = UIScreen.main.scale 
    let retinaSquare = CGSize(width: size * retinaScale, height: size * retinaScale)//CGSizeMake(size * retinaScale, size * retinaScale) 
    let cropSizeLength = min(asset.pixelWidth, asset.pixelHeight) 
    let square = CGRect(x: 0, y: 0, width: cropSizeLength, height: cropSizeLength)//CGRectMake(0, 0, CGFloat(cropSizeLength), CGFloat(cropSizeLength)) 
    let cropRect = square.applying(CGAffineTransform(scaleX: 1.0/CGFloat(asset.pixelWidth), y: 1.0/CGFloat(asset.pixelHeight))) 

    let manager = PHImageManager.default() 
    let options = PHImageRequestOptions() 
    var thumbnail = UIImage() 

    options.isSynchronous = true 
    options.deliveryMode = .highQualityFormat 
    options.resizeMode = .exact 
    options.normalizedCropRect = cropRect 

    manager.requestImage(for: asset, targetSize: retinaSquare, contentMode: .aspectFit, options: options, resultHandler: {(result, info)->Void in 
     thumbnail = result! 
    }) 


    return thumbnail 
} 
override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 


} 

func textFieldShouldReturn(_ textField: UITextField) -> Bool { 
    self.view.endEditing(true); 

    if sefareshTitleTextField!.text == "" { 

     typeandtranslateViewController.checkTextField = false 


     print("sefaresh title is nill") 
    } else if sefareshTitleTextField!.text! != "" { 


     typeandtranslateViewController.checkTextField = true 
     print("sefaresh title isnt nill") 

    } 



    return false; 



} 

func textFieldDidBeginEditing(_ textField: UITextField) { 

     if sefareshTitleTextField!.text! == "" { 

     typeandtranslateViewController.checkTextField = false 


     print("sefaresh title is nill") 
     } else if sefareshTitleTextField!.text! != "" { 


     typeandtranslateViewController.checkTextField = true 
     print("sefaresh title isnt nill") 

     } 

} 



//MARK: 
//MARK: Collectioview methods 


func collectionView(_ collectionView: UICollectionView, 
        numberOfItemsInSection section: Int) -> Int { 
    return arr_img.count 
} 
func collectionView(_ collectionView: UICollectionView, 
        cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { 
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "celll", 
                for: indexPath) 
    let imgview : UIImageView = cell.viewWithTag(20) as! UIImageView 
    imgview.image = self.getAssetThumbnail(asset: self.arr_img.object(at: indexPath.row) as! PHAsset, size: 150) 

    let selectView : UIImageView = cell.viewWithTag(22) as! UIImageView 
    if arr_selected.contains(indexPath.row){ 

     selectView.image = UIImage(named: "Select.png") 
    }else{ 

     selectView.image = UIImage(named: "radioCircleButton.png") 

    } 

    cell.layer.cornerRadius = 5 
    cell.layer.borderWidth = 1 
    cell.layer.borderColor = UIColor.clear.cgColor 
    cell.clipsToBounds = true 


    return cell 
} 

var selectedIndexes = [NSIndexPath]() { 
    didSet { 
     collview.reloadData() 
    } 
} 
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) 
{ 



    if arr_selected.contains(indexPath.row){ 
     arr_selected.remove(indexPath.row) 
    }else{ 
     arr_selected.add(indexPath.row) 
    } 

    self.collview.reloadData() 

} 



override func viewDidAppear(_ animated: Bool) { 

    let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.dark) 
    let blurView = UIVisualEffectView(effect: blurEffect) 
    blurView.frame = backgroundimg.bounds 
    backgroundimg.addSubview(blurView) 
    backgroundimg.frame = self.view.bounds 
} 

@IBAction func backToTheMainCustom(_ sender: UIButton) { 

    performSegue(withIdentifier: "backToTheMainCustom", sender: self) 

    sefareshTitleTextField!.text! = "" 

    typeandtranslateViewController.checkTextField = false 
} 

} 

Answer 1

Zuerst müssen Sie Benutzer fragen, für Berechtigungen für den Zugriff auf die Fotobibliothek. Wenn die Anfrage zum ersten Mal stattfindet, warten Sie auf seine Antwort und öffnen Sie den UIImagePickerController erneut. Bitte lesen Sie den folgenden Code ein:

let photosAccess = PHPhotoLibrary.authorizationStatus() 
switch photosAccess { 
case .notDetermined: 
    // First time here. Request the access 
    PHPhotoLibrary.requestAuthorization({status in 
     if status == .authorized{ 
      // Access was just granted 
      // Open library here 
     } 
    }) 

case .authorized: 
    // Open library here 

case .denied, .restricted: 
    // Photos access is not granted. 
    // Good place to take user to app settings. 
} 

Das gleiche über Kamera:

AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo) { response in 
    if response { 
     DispatchQueue.main.async { 
      // Show camera UI here 
     } 
    } else { 
     DispatchQueue.main.async { 
      // Access is restricred 
     } 
    } 
}