Swift 4.2 imagePickerController issue

问题

Trying to pass chat client from swift 4 to swift 4.2 and with picker i found trouble.

UIImagePickerControllerEditedImage Cannot subscript a value of type '[String : Any]' with an index of type 'UIImagePickerController.InfoKey'

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

    if let pickedImage = info[UIImagePickerControllerEditedImage] as? UIImage {
        self.userProfileImage.contentMode = .scaleAspectFit
        self.userProfileImage.image = pickedImage
    }

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

回答1:

The method signature has changed to

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])

You should see a warning message for the func name

Instance method 'imagePickerController(:didFinishPickingMediaWithInfo:)' nearly matches optional requirement 'imagePickerController(:didFinishPickingMediaWithInfo:)' of protocol 'UIImagePickerControllerDelegate'

Candidate has non-matching type '(UIImagePickerController, [String : Any]) -> ()'

Move 'imagePickerController(_:didFinishPickingMediaWithInfo:)' to another extension to silence this warning

Make 'imagePickerController(_:didFinishPickingMediaWithInfo:)' private to silence this warning

Requirement 'imagePickerController(_:didFinishPickingMediaWithInfo:)' declared here (UIKit.UIImagePickerControllerDelegate)

回答2:

In Swift 4.2 imagePickerController delegate methods has changed a bit. Kindly check out the below code.

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

    var selectedImage: UIImage?
    if let editedImage = info[.editedImage] as? UIImage {
        selectedImage = editedImage
        self.profileImage.image = selectedImage!
        picker.dismiss(animated: true, completion: nil)
    } else if let originalImage = info[.originalImage] as? UIImage {
        selectedImage = originalImage
        self.profileImage.image = selectedImage!
        picker.dismiss(animated: true, completion: nil)
    }

}

This will work for sure.

回答3:

like this

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

回答4:

Swift4.2

 //MARK:- ImagePicker Controller Delegate
 //MARK:-

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

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    if let chosenImage = info[.originalImage] as? UIImage {
        yourimage.contentMode = .scaleAspectFill
        yourimage.image = chosenImage

    } else{
        print("Something went wrong")
    }
}

回答5:

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

        if let pickedImage = info[UIImagePickerController.InfoKey.editedImage] as? UIImage {
            yourImage.image = pickedImage
        }else{
            print("Something went wrong!!")
        }
    }

回答6:

extension CameraViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if let chosenImage = info[.originalImage] as? UIImage {
            selectedImage = chosenImage
            photo.image = chosenImage
        }
        dismiss(animated: true, completion: nil)
    }
}

Above code solved the warning and image successfully uploaded

来源：https://stackoverflow.com/questions/51863259/swift-4-2-imagepickercontroller-issue

标签

swift

uiimagepickercontroller

swift4.2