I'm upgrading an existing app with some swift views. Now I'm getting the warning:
Instance method 'imagePickerController(:didFinishPickingMediaWithInfo:)' nearly matches optional requirement 'imagePickerController(:didFinishPickingMediaWithInfo:)' of protocol 'UIImagePickerControllerDelegate'
at the function:
public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
if let image = info[.originalImage] as? UIImage {
self.onImagePicked(image)
}
self.onDismiss()
}
Additionally I get the error message:
Cannot infer contextual base in reference to member 'originalImage'
The funny thing is, if I copy the code in a new project everything is fine (no warning, no error). In order to check whether I may have some effects from other views/methods within the existing project, I copied my existing project and deleted all other files, except the one with the imagepicker - still the warning and the error.
Is there any setup or other issue which might be the reason? Any help is more than appreciated - working on that the third day now ....
The whole code is:
import SwiftUI
public struct ImagePickerView: UIViewControllerRepresentable {
private let sourceType: UIImagePickerController.SourceType
private let onImagePicked: (UIImage) -> Void
#Environment(\.presentationMode) private var presentationMode
public init(sourceType: UIImagePickerController.SourceType, onImagePicked: #escaping (UIImage) -> Void) {
self.sourceType = sourceType
self.onImagePicked = onImagePicked
}
public func makeUIViewController(context: Context) -> UIImagePickerController {
let picker = UIImagePickerController()
picker.sourceType = self.sourceType
picker.delegate = context.coordinator
return picker
}
public func updateUIViewController(_ uiViewController: UIImagePickerController, context: Context) {}
public func makeCoordinator() -> Coordinator {
Coordinator(
onDismiss: { self.presentationMode.wrappedValue.dismiss() },
onImagePicked: self.onImagePicked
)
}
public class Coordinator: NSObject, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
private let onDismiss: () -> Void
private let onImagePicked: (UIImage) -> Void
init(onDismiss: #escaping () -> Void, onImagePicked: #escaping (UIImage) -> Void) {
self.onDismiss = onDismiss
self.onImagePicked = onImagePicked
}
public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
if let image = info[.originalImage] as? UIImage {
self.onImagePicked(image)
}
print("vor dismiss")
self.onDismiss()
}
public func imagePickerControllerDidCancel(_: UIImagePickerController) {
self.onDismiss()
}
}
}
The project Format is Xcode 12.0-compatible, iOS Deployment Target is 14.0,
The project includes originally also watch
Got the answer, can't explain but instead of
public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
it works fine with
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
The problem is solved, however, if anyone could explain - more than welcome
Related
Is there a way to make the PhotosUI PhotosPicker in SwiftUI source the photos directly from the Camera? I'm trying to change the PhotosPickers in my app to use the camera instead of forcing the user to select images from their image library. Is there a way to dictate the source of PhotosPicker images like you can with ImagePicker?
I did an online search and a lot of articles talked about PhotoPicker, but none of the examples had a way to make it use the camera. Should I just bite the bullet and switch everything to image picker or is there a way to make PhotoPicker use the camera?
Thanks.
step 1 : Create a dialogue to select the option for a camera of the photo
step 2 : Create a action sheet for for image picker
struct BaseView: View {
#State var showSelection: Bool = false
#State var showPicker: Bool = false
#State var type: UIImagePickerController.SourceType = .photoLibrary
var body: some View {
Zstack {
YourView()
}
.confirmationDialog(Lables.selectImage,
isPresented: $showSelection,
titleVisibility: .hidden) {
Button(ButtonName.camera) {
showPicker = true
type = .camera
}
Button(ButtonName.photos) {
showPicker = true
type = .photoLibrary
}
}
.fullScreenCover(isPresented: $showPicker) {
ImagePickerView(sourceType: profileImageVM.pickerType) { image in
// image your image
}
}
}
}
step 3: Create Image Picker
struct ImagePickerView: UIViewControllerRepresentable {
private var sourceType: UIImagePickerController.SourceType
private let onImagePicked: (UIImage) -> Void
#Environment(\.presentationMode) private var presentationMode
public init(sourceType: UIImagePickerController.SourceType, onImagePicked: #escaping (UIImage) -> Void) {
self.sourceType = sourceType
self.onImagePicked = onImagePicked
}
public func makeUIViewController(context: Context) -> UIImagePickerController {
let picker = UIImagePickerController()
picker.sourceType = self.sourceType
picker.delegate = context.coordinator
return picker
}
public func updateUIViewController(_ uiViewController: UIImagePickerController, context: Context) {}
public func makeCoordinator() -> Coordinator {
Coordinator(
onDismiss: { self.presentationMode.wrappedValue.dismiss() },
onImagePicked: self.onImagePicked
)
}
final public class Coordinator: NSObject, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
private let onDismiss: () -> Void
private let onImagePicked: (UIImage) -> Void
init(onDismiss: #escaping () -> Void, onImagePicked: #escaping (UIImage) -> Void) {
self.onDismiss = onDismiss
self.onImagePicked = onImagePicked
}
public func imagePickerController(_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
if let image = info[.originalImage] as? UIImage {
self.onImagePicked(image)
}
self.onDismiss()
}
public func imagePickerControllerDidCancel(_: UIImagePickerController) {
self.onDismiss()
}
}
}
I'm working on a camera app and I've got a problem.
I've never used UIKit to build an app, but a lot of the reference code does.
So I tried to convert it using swiftUI but I failed.
There is UIKit code which I want to convert to SwiftUI.
static func startMediaBrowser(
delegate: UIViewController & UINavigationControllerDelegate & UIImagePickerControllerDelegate,
sourceType: UIImagePickerController.SourceType
) {
guard UIImagePickerController.isSourceTypeAvailable(sourceType)
else { return }
let mediaUI = UIImagePickerController()
mediaUI.sourceType = sourceType
mediaUI.mediaTypes = [kUTTypeMovie as String]
mediaUI.allowsEditing = true
mediaUI.delegate = delegate
delegate.present(mediaUI, animated: true, completion: nil)
}
import AVKit
import MobileCoreServices
import UIKit
class PlayVideoViewController: UIViewController {
#IBAction func playVideo(_ sender: AnyObject) {
VideoHelper.startMediaBrowser(delegate: self, sourceType: .savedPhotosAlbum)
}
}
// MARK: - UIImagePickerControllerDelegate
extension PlayVideoViewController: UIImagePickerControllerDelegate {
func imagePickerController(
_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]
) {
guard
let mediaType = info[UIImagePickerController.InfoKey.mediaType] as? String,
mediaType == (kUTTypeMovie as String),
let url = info[UIImagePickerController.InfoKey.mediaURL] as? URL
else { return }
dismiss(animated: true) {
let player = AVPlayer(url: url)
let vcPlayer = AVPlayerViewController()
vcPlayer.player = player
self.present(vcPlayer, animated: true, completion: nil)
}
}
}
// MARK: - UINavigationControllerDelegate
extension PlayVideoViewController: UINavigationControllerDelegate {
}
Here's what I've tried, and the compilation passes, but it only does UIImagePickerController() , and the delegate function I wrote doesn't work.
import SwiftUI
import AVKit
import MobileCoreServices
import UIKit
struct ContentView: View {
#State private var isShowVideoLibrary = false
#State private var image = UIImage()
#State private var isShowCamara = false
var body: some View {
VStack {
HStack{
Button {
isShowVideoLibrary.toggle()
} label: {
Text("Play video")
}
}
}
.sheet(isPresented: $isShowVideoLibrary) {
VideoPicker(sourceType: .photoLibrary)
}
}
struct VideoPicker: UIViewControllerRepresentable {
var sourceType: UIImagePickerController.SourceType = .photoLibrary
#Environment(\.presentationMode) private var presentationMode
func makeUIViewController(context: UIViewControllerRepresentableContext<VideoPicker>) -> UIViewController {
let mediaUI = UIImagePickerController()
mediaUI.sourceType = sourceType
mediaUI.mediaTypes = [kUTTypeMovie as String]
mediaUI.allowsEditing = true
mediaUI.delegate = context.coordinator
return mediaUI
}
func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) {
}
final class Coordinator : NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate{
var parent: VideoPicker
init(_ parent: VideoPicker) {
self.parent = parent
}
private func imagePickerController(
_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) -> UIViewController {
guard
let mediaType = info[UIImagePickerController.InfoKey.mediaType] as? String,
mediaType == (kUTTypeMovie as String),
let url = info[UIImagePickerController.InfoKey.mediaURL] as? URL
else { return AVPlayerViewController()}
// 2
parent.presentationMode.wrappedValue.dismiss()
//3
let player = AVPlayer(url: url)
let vcPlayer = AVPlayerViewController()
vcPlayer.player = player
return vcPlayer
}
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
}
The problem you have is that you haven't implemented the correct UIImagePickerControllerDelegate function signature.
Your Coordinator has:
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) -> UIViewController
while the correct method is:
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
The method won't get called unless the signature matches exactly.
A solution
The UIImagePickerController is just used to select the image or video, you'll need additional cod to play the selected video. Luckily SwiftUI has a VideoPlayer that makes it easy:
import UniformTypeIdentifiers
struct ContentView: View {
#State private var isShowVideoLibrary = false
#State private var url: URL?
var body: some View {
Group {
if let url {
VideoPlayer(player: AVPlayer(url: url))
} else {
VStack {
HStack{
Button {
isShowVideoLibrary.toggle()
} label: {
Text("Play video")
}
}
}
}
}
.sheet(isPresented: $isShowVideoLibrary) {
VideoPicker(sourceType: .photoLibrary) { url in
self.url = url
isShowVideoLibrary = false
}
}
}
}
struct VideoPicker: UIViewControllerRepresentable {
var sourceType: UIImagePickerController.SourceType = .photoLibrary
let didFinish: (URL?) -> Void
func makeUIViewController(context: UIViewControllerRepresentableContext<VideoPicker>) -> UIViewController {
let mediaUI = UIImagePickerController()
mediaUI.sourceType = sourceType
mediaUI.mediaTypes = [UTType.movie.identifier]
mediaUI.allowsEditing = true
mediaUI.delegate = context.coordinator
return mediaUI
}
func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) {
}
final class Coordinator : NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate{
let didFinish: (URL?) -> Void
init(didFinish: #escaping (URL?) -> Void) {
self.didFinish = didFinish
}
// This func passes the URL back to the calling View
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
guard
let mediaType = info[UIImagePickerController.InfoKey.mediaType] as? String,
mediaType == UTType.movie.identifier,
let url = info[UIImagePickerController.InfoKey.mediaURL] as? URL
else {
didFinish(nil)
return
}
didFinish(url)
}
}
func makeCoordinator() -> Coordinator {
Coordinator(didFinish: didFinish)
}
}
In my camera app, I click a photo and press the use photo button. When the user presses the "Use Photo" button after clicking the photo, the photo gets saved in the photo library(if the user allows the app to) but the CameraView completely freezes. Here are parts of the code that might help:
ContentView:
struct ContentView: View {
var body: some View {
CameraView()
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
Part of the CameraView:
extension CameraView {
class Coordinator : NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var parent: CameraView
init(_ parent: CameraView) {
self.parent = parent
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
fatalError("Cancel button pressed!")
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)
CustomizeView()
}
}
}
}
This is the block of code where Use Photo is controlled
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil) //Where the CameraView freezes after this.
}
I am trying for the first time to use an external library, WDImagePicker. Below is the WDImagePicker code relevant to my problem.
#objc public protocol WDImagePickerDelegate {
#objc optional func imagePicker(imagePicker: WDImagePicker, pickedImage: UIImage)
#objc optional func imagePickerDidCancel(imagePicker: WDImagePicker)
}
#objc public class WDImagePicker: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate, WDImageCropControllerDelegate {
public var delegate: WDImagePickerDelegate?
private var _imagePickerController: UIImagePickerController!
public var imagePickerController: UIImagePickerController {
return _imagePickerController
}
override public init() {
super.init()
self.cropSize = CGSize(width: 320, height: 320)
_imagePickerController = UIImagePickerController()
_imagePickerController.delegate = self
_imagePickerController.sourceType = .photoLibrary
}
public func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
print("this line never runs\n\n")
}
}
In the controller I wrote myself, I have this method, which presents cropImagePicker's imagePickerContoller; however even though the delegate of this controller is cropImagePicker, cropImagePicker's ImagePickerControllerDelegate methods never get called (I tested all of them).
#IBAction func cameraButtonPressed() {
let cropImagePicker = WDImagePicker()
cropImagePicker.cropSize = CGSize(width: 50, height: 50)
cropImagePicker.delegate = self
cropImagePicker.resizableCropArea = false
cropImagePicker.imagePickerController.delegate = cropImagePicker
self.present(cropImagePicker.imagePickerController, animated: true, completion: nil)
}
Why is this happening? Could it be because of the swift 3 changes I had to make to the library? And most importantly, how can I get around this? All input is appreciated.
I'm having difficulty with the use of ZBar library as soon as I opened the project in Swift 2.2 with Xcode 8. I've always used a bridge to run this library but on xcode I immediately a red extension of ZbarSymbolSet.
Use of undeclared type 'ZbarSymbolSet'
//Extension for Zbar
extension ZBarSymbolSet: SequenceType {
public func generate() -> NSFastGenerator {
return NSFastGenerator(self)
}
}
for Swift 3:
extension ZBarSymbolSet: Sequence {
public func makeIterator() -> NSFastEnumerationIterator {
return NSFastEnumerationIterator(self)
}
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
// ADD: get the decode results
let results: NSFastEnumeration = info[ZBarReaderControllerResults] as! NSFastEnumeration
var symbolFound : ZBarSymbol?
for symbol in results as! ZBarSymbolSet {
symbolFound = symbol as? ZBarSymbol
break
}
let resultString = symbolFound!.data
print(resultString)
}