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//
// ContentView.swift
// PhotoPicker2
//
// Created by Ray Fix on 10/31/20.
//
import SwiftUI
import PhotosUI
import UIKit
import Combine
class MyViewController: UIViewController {
var viewModel: ViewModel = ViewModel()
var subscriptions: Set<AnyCancellable> = []
@IBOutlet weak var countLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
viewModel.$images
.sink { [weak self] images in
self?.countLabel.text = String(images.count)
}
// .sink { [countLabel] images in
// DispatchQueue.global(qos: .userInitiated).async {
// let text = String(images.count)
// DispatchQueue.main.async {
// countLabel?.text = text
// }
// }
// }
// .receive(on: DispatchQueue.global(qos: .userInitiated))
// .map(\.count)
// .map(String.init)
// .receive(on: DispatchQueue.main)
// .assign(to: \.text, on: countLabel)
.store(in: &subscriptions)
}
@IBAction func showContentViewTapped() {
let vc = UIHostingController(rootView: ContentView(viewModel: viewModel))
present(vc, animated: true)
}
}
final class ViewModel: ObservableObject {
@Published var images: [UIImage] = []
@Published var showingImagePicker = false
}
struct Spinner: UIViewRepresentable {
let isAnimating: Bool
func makeUIView(context: Context) -> UIActivityIndicatorView {
let activity = UIActivityIndicatorView(style: .large)
activity.hidesWhenStopped = false
return activity
}
func updateUIView(_ uiView: UIActivityIndicatorView, context: Context) {
isAnimating ? uiView.startAnimating() : uiView.stopAnimating()
}
}
struct ImagePicker: UIViewControllerRepresentable {
@Binding var isShowingPicker: Bool
@Binding var images: [UIImage]
final class MyCoordinator: PHPickerViewControllerDelegate {
var parent: ImagePicker
init(_ parent: ImagePicker) {
self.parent = parent
}
func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
print("finished")
parent.isShowingPicker = false
parent.images = []
for result in results where result.itemProvider.canLoadObject(ofClass: UIImage.self) {
result.itemProvider.loadObject(ofClass: UIImage.self) { (image, error) in
if let image = image {
DispatchQueue.main.async {
if let img = image as? UIImage {
self.parent.images.append(img)
}
}
}
}
}
}
}
func makeCoordinator() -> MyCoordinator {
MyCoordinator(self)
}
func makeUIViewController(context: Context) -> PHPickerViewController {
var configuration = PHPickerConfiguration()
configuration.filter = .images
configuration.selectionLimit = 10
let picker = PHPickerViewController(configuration: configuration)
picker.delegate = context.coordinator
return picker
}
func updateUIViewController(_ uiViewController: PHPickerViewController, context: Context) {
}
}
struct ContentView: View {
@ObservedObject var viewModel: ViewModel
var body: some View {
VStack {
ScrollView {
VStack {
ForEach(Array(viewModel.images.enumerated()), id: \.offset ) { offset, image in
Image(uiImage: image)
.resizable()
.scaledToFit()
}
}
}
Button("Select Image") {
viewModel.showingImagePicker = true
}.padding()
}.sheet(isPresented: $viewModel.showingImagePicker) {
ImagePicker(isShowingPicker: $viewModel.showingImagePicker, images: $viewModel.images)
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView(viewModel: ViewModel())
}
}
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