[英]Accessing the camera and photo library in swift 4
I'm trying to access both the camera and photo library in swift4 using the following code我正在尝试使用以下代码访问 swift4 中的相机和照片库
let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
let alert = UIAlertController(title: "", message: "", preferredStyle: .actionSheet)
alert.addAction(UIAlertAction(title: "Camera", style: .default, handler: {(action: UIAlertAction) in
imagePickerController.sourceType = .camera
print(1)
}))
alert.addAction(UIAlertAction(title: "Photo Album", style: .default, handler: {(action: UIAlertAction) in
imagePickerController.sourceType = .photoLibrary
}))
alert.addAction(UIAlertAction(title: "Cancel", style: .default, handler: nil))
self.present(alert, animated: true, completion: nil)
but it's not working.但它不起作用。 I'm not get an access authorization request even though I made sure that the plist has the camera and photo library authorization.即使我确保 plist 具有相机和照片库授权,我也没有收到访问授权请求。 I manipulate the code a bit to the following我对以下代码进行了一些操作
AVCaptureDevice.requestAccess(for: AVMediaType.video) { response in
}
let photos = PHPhotoLibrary.authorizationStatus()
if photos == .notDetermined {
PHPhotoLibrary.requestAuthorization({status in
})
}
let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
let alert = UIAlertController(title: "", message: "", preferredStyle: .actionSheet)
alert.addAction(UIAlertAction(title: "Camera", style: .default, handler: {(action: UIAlertAction) in
imagePickerController.sourceType = .camera
print(1)
}))
alert.addAction(UIAlertAction(title: "Photo Album", style: .default, handler: {(action: UIAlertAction) in
imagePickerController.sourceType = .photoLibrary
}))
alert.addAction(UIAlertAction(title: "Cancel", style: .default, handler: nil))
self.present(alert, animated: true, completion: nil)
Now I am getting the authorization request for both cameras and photo library and I can see the AlertView but when I press camera or Photo Album as shown in the picture nothing happens.现在我收到了相机和照片库的授权请求,我可以看到 AlertView,但是当我按下图片中所示的相机或相册时,没有任何反应。
I tried on a device and simulator for the camera.我尝试了相机的设备和模拟器。
Here is the code to load image from photos & camera in iOS.这是从 iOS 中的照片和相机加载图像的代码。
⁃ You need to create an outlet of your UIImageView ⁃ 您需要为您的 UIImageView 创建一个插座
⁃ Then add a tap gesture on to image view ⁃ 然后在图像视图上添加点击手势
⁃ Then connect tap gesture with the didTapOnImageView function. ⁃ 然后将点击手势与 didTapOnImageView 函数连接起来。
⁃ Then add the following extension to your view controller. ⁃ 然后将以下扩展添加到您的视图控制器中。
//MARK:- Image Picker
extension YourViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
//This is the tap gesture added on my UIImageView.
@IBAction func didTapOnImageView(sender: UITapGestureRecognizer) {
//call Alert function
self.showAlert()
}
//Show alert to selected the media source type.
private func showAlert() {
let alert = UIAlertController(title: "Image Selection", message: "From where you want to pick this image?", preferredStyle: .actionSheet)
alert.addAction(UIAlertAction(title: "Camera", style: .default, handler: {(action: UIAlertAction) in
self.getImage(fromSourceType: .camera)
}))
alert.addAction(UIAlertAction(title: "Photo Album", style: .default, handler: {(action: UIAlertAction) in
self.getImage(fromSourceType: .photoLibrary)
}))
alert.addAction(UIAlertAction(title: "Cancel", style: .destructive, handler: nil))
self.present(alert, animated: true, completion: nil)
}
//get image from source type
private func getImage(fromSourceType sourceType: UIImagePickerController.SourceType) {
//Check is source type available
if UIImagePickerController.isSourceTypeAvailable(sourceType) {
let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
imagePickerController.sourceType = sourceType
self.present(imagePickerController, animated: true, completion: nil)
}
}
//MARK:- UIImagePickerViewDelegate.
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
self.dismiss(animated: true) { [weak self] in
guard let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage else { return }
//Setting image to your image view
self?.profileImgView.image = image
}
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
picker.dismiss(animated: true, completion: nil)
}
}
Note: Don't forget to add the privacy settings in info.plist注意:不要忘记在 info.plist 中添加隐私设置
Privacy - Camera Usage Description隐私 - 相机使用说明
Privacy - Photo Library Usage Description隐私 - 照片库使用说明
First of all, you need to import these libraries:首先,您需要导入这些库:
import Photos
import UIKit
@IBOutlet weak var loadPhoto: UIButton!
And you need setup delegates:你需要设置代表:
class YourClass: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, UNUserNotificationCenterDelegate
func displayUploadImageDialog(btnSelected: UIButton) {
let picker = UIImagePickerController()
picker.delegate = self
picker.allowsEditing = true
let alertController = UIAlertController(title: "", message: "Upload profile photo?".localized(), preferredStyle: .actionSheet)
let cancelAction = UIAlertAction(title: NSLocalizedString("Cancel", comment: "Cancel action"), style: .cancel, handler: {(_ action: UIAlertAction) -> Void in
alertController.dismiss(animated: true) {() -> Void in }
})
alertController.addAction(cancelAction)
let cameraRollAction = UIAlertAction(title: NSLocalizedString("Open library".localized(), comment: "Open library action"), style: .default, handler: {(_ action: UIAlertAction) -> Void in
if UI_USER_INTERFACE_IDIOM() == .pad {
OperationQueue.main.addOperation({() -> Void in
picker.sourceType = .photoLibrary
self.present(picker, animated: true) {() -> Void in }
})
}
else {
picker.sourceType = .photoLibrary
self.present(picker, animated: true) {() -> Void in }
}
})
alertController.addAction(cameraRollAction)
alertController.view.tintColor = .black
present(alertController, animated: true) {() -> Void in }
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
let image = info[UIImagePickerControllerOriginalImage] as! UIImage
profileImage.image = image
let imageData = UIImageJPEGRepresentation(image, 0.05)
self.dismiss(animated: true, completion: nil)
}
func checkPermission() {
let authStatus = AVCaptureDevice.authorizationStatus(for: AVMediaType.video)
switch authStatus {
case .authorized:
self.displayUploadImageDialog(btnSelected: self.loadPhoto)
case .denied:
print("Error")
default:
break
}
}
func imagePickerControllerDidCancel(picker: UIImagePickerController) {
self.dismiss(animated: true, completion: nil)
}
func checkLibrary() {
let photos = PHPhotoLibrary.authorizationStatus()
if photos == .authorized {
switch photos {
case .authorized:
self.displayUploadImageDialog(btnSelected: self.loadPhoto)
case .denied:
print("Error")
default:
break
}
}
}
Setup action for button:按钮的设置动作:
@IBAction func loadPhotoTapped(_ sender: UIButton) {
let photos = PHPhotoLibrary.authorizationStatus()
if photos == .notDetermined {
PHPhotoLibrary.requestAuthorization({status in
if status == .authorized{
print("OKAY")
} else {
print("NOTOKAY")
}
})
}
checkLibrary()
checkPermission()
}
At the Info.plist setup the permissions:在 Info.plist 设置权限:
Privacy - Media Library Usage Description隐私 - 媒体库使用说明
Privacy - Photo Library Usage Description隐私 - 照片库使用说明
Privacy - Camera Usage Description隐私 - 相机使用说明
This should work.这应该有效。
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