由于目前SwiftUI还未实现这个组件，所以需要使用UIkit的组件包装后在Swiftui使用。
import UIKit
import SwiftUI
struct ImagePicker: UIViewControllerRepresentable {
@Environment(\.presentationMode)
private var presentationMode
let sourceType: UIImagePickerController.SourceType
let onImagePicked: (UIImage) -> Void
final class Coordinator: NSObject,
UINavigationControllerDelegate,
UIImagePickerControllerDelegate {
@Binding
private var presentationMode: PresentationMode
private let sourceType: UIImagePickerController.SourceType
private let onImagePicked: (UIImage) -> Void
init(presentationMode: Binding<PresentationMode>,
sourceType: UIImagePickerController.SourceType,
onImagePicked: @escaping (UIImage) -> Void) {
_presentationMode = presentationMode
self.sourceType = sourceType
self.onImagePicked = onImagePicked
}
func imagePickerController(_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
let uiImage = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
onImagePicked(uiImage)
presentationMode.dismiss()
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
presentationMode.dismiss()
}
}
func makeCoordinator() -> Coordinator {
return Coordinator(presentationMode: presentationMode,
sourceType: sourceType,
onImagePicked: onImagePicked)
}
func makeUIViewController(context: UIViewControllerRepresentableContext<ImagePicker>) -> UIImagePickerController {
let picker = UIImagePickerController()
picker.sourceType = sourceType
picker.delegate = context.coordinator
return picker
}
func updateUIViewController(_ uiViewController: UIImagePickerController,
context: UIViewControllerRepresentableContext<ImagePicker>) {
}
}
使用
在swift的布局里初始化两个变量，一个控制选择器状态，一个获取选择的图片
@State var showImagePicker: Bool = false
@State var image: Image? = nil
.sheet(isPresented: $showImagePicker) {
ImagePicker(sourceType: .photoLibrary) { image in
self.image = Image(uiImage: image)
}
}
现在swiftui还是不完善，希望能够尽快完善一下，不然我还要重头学习UIKit。
