如果这在 iOS 的最后几个版本上工作，但在 14 上无法正常工作，我在过去的 5 天里一直在谷歌上搜索。
每当我从图库中添加图像时，选择图像的弹出窗口都是空白的。
我已经尝试过 UIImagePickerController（在 iOS13 及以下版本中运行良好）和新的 PHPickerViewController。
在 iOS14 之前一直在工作的是用户单击条形按钮以“添加图像”并且弹出窗口要求从图库中选择，然后在您的图库中向选择器显示图像。
我已经为 UIImagePickerController 设置了 Info.plist “隐私 - 照片库使用说明”，我知道 PHPickerViewController 不需要烫发，因为它会为您处理获取图像。
我也经常看到这些紫色警告说“xxxx 必须仅从主线程使用”，直到新的 Xcode 之前从未见过。
任何帮助将非常感激。运行 Xcode 12.0.1 (12A7300)，模拟器运行 iOS14。
亚当
class AddCustomExerciseViewController: UIViewController, UITextViewDelegate, UINavigationControllerDelegate, GADBannerViewDelegate, UIImagePickerControllerDelegate, PHPickerViewControllerDelegate{
let alert = UIAlertController(title: "Choose Image", message: nil, preferredStyle: .actionSheet)
alert.addAction(UIAlertAction(title: "Gallery", style: .default, handler: { _ in self.openGallery() }))
alert.addAction(UIAlertAction.init(title: "Cancel", style: .cancel, handler: nil))
self.present(alert, animated: true, completion: nil)
func openGallery()
{
let photoAuthorizationStatus = PHPhotoLibrary.authorizationStatus()
switch photoAuthorizationStatus {
case .authorized:
self.showGallery()
print("Access is granted by user")
case .notDetermined:
PHPhotoLibrary.requestAuthorization({
(newStatus) in
print("status is \(newStatus)")
if newStatus == PHAuthorizationStatus.authorized {
self.showGallery()
print("success")
}
})
print("It is not determined until now")
case .restricted:
// same same
print("User do not have access to photo album.")
case .denied:
// same same
print("User has denied the permission.")
case .limited:
// same same
print("User has denied the permission.")
}
}
func showGallery()
{
if #available(iOS 14, *)
{
var configuration = PHPickerConfiguration()
configuration.filter = .images
configuration.selectionLimit = 0
let picker = PHPickerViewController(configuration: configuration)
picker.delegate = self
self.present(picker, animated: true, completion: nil)
}
else
{
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerController.SourceType.photoLibrary){
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.allowsEditing = false
imagePicker.sourceType = UIImagePickerController.SourceType.photoLibrary
self.present(imagePicker, animated: true, completion: nil)
}
else
{
let alert = UIAlertController(title: "Warning", message: "You don't have permission to access gallery.", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(alert, animated: true, completion: nil)
}
}
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
//get the file url
if let fileUrl = info[UIImagePickerControllerImageURL] as? URL {
print(fileUrl)
print(fileUrl.lastPathComponent)
let filePath = fileUrl.lastPathComponent
if(filePath.hasSuffix("GIF")||filePath.hasSuffix("gif"))
{
//to change later to support gifs
gifView.image = pickedImage
}
else
{
//to show the static image to users
gifView.image = pickedImage
}
//for saving the file name to retrieve in local parse datastore
imageNameToSave = fileUrl.lastPathComponent
}
//for saving the selected image
imageToSave = pickedImage
}
picker.dismiss(animated: true, completion: nil)
}
@available(iOS 14, *)
func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult])
{
picker.dismiss(animated: true, completion: nil)
for result in results
{
result.itemProvider.loadObject(ofClass: UIImage.self, completionHandler: { (object, error) in
if let image = object as? UIImage {
DispatchQueue.main.async {
// Use UIImage
print("Selected image: \(image)")
}
}
})
}
} }