[swift] シェア画面を追加

ActivityView.swift
L Anyは任意の値を表すデータ型、どんな型でもOK

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
import SwiftUI
 
struct ActivityView: UIViewControllerRepresentable {
     
    let shareItems: [Any]
     
    func makeUIViewController(context: Context) ->
    UIActivityViewController {
         
    let controller = UIActivityViewController(
        activityItems: shareItems,
        applicationActivities: nil)
         
        return controller
    }
     
    func uupdateUIViewController(
        _ uiViewController: UIActivityViewController,
        context: UIViewControllerRepresentableContext<ActivityView>){
             
        }
}

ContentView.swift
　L 写真がないこともある変数をオプショナル変数という　アンラップ処理をする

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
    Button(action: {
        if let _ = captureImage{
            isShowActivity = true
        }
    }){
        Text("SNSに投稿する")
            .frame(maxWidth: .infinity)
            .frame(height: 50)
            .multilineTextAlignment(.center)
            .background(Color.blue)
            .foregroundColor(Color.white)
    }
    .padding()
    .sheet(isPresented: $isShowActivity){
        ActivityView(shareItems: [captureImage!])
    }
}

###　フォトライブラリから写真を取り込めるようにする
PHPickerViewControllerはPhotoKitで提供されている機能
coordinatorを使用する

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
struct PHPickerView: UIViewControllerRepresentable {
     
    @Binding var isShowSheet: Bool
    @Binding var captureImage: UIImage?
     
    class Coordinator: NSObject,
                       PHPickerViewControllerDelegate {
        var parent: PHPickerView
         
        init(parent: PHPickerView){
            self.parent = parent
        }
         
        func picker(
            _ picker: PHPickerViewController,
            didFinishPicking results: [PHPickerResult]){
                 
                if let result = results.first {
                    result.itemProvider.loadObject(ofClass: UIImage.self){
                        (image, error) in
                         
                        if let unwrapImage = image as? UIImage {
                            self.parent.captureImage = unwrapImage
                        } else {
                            print("使用できる写真がないです")
                        }
                    }
                } else {
                    print("選択された写真はないです")
                }
                parent.isShowSheet = false
            }
    }
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
func makeCoordinator() -> Coordinator {
    Coordinator(parent: self)
}
 
func makeUIViewController(
    context:UIViewControllerRepresentableContext<PHPickerView>)
-> PHPickerViewController {
    var configuration = PHPickerConfiguration()
    configuration.filter = .images
    configuration.selectionLimit = 1
    let picker = PHPickerViewController(configuration: configuration)
    picker.delegate = context.coordinator
    return picker
}
 
func updateUIViewController(
    _ uiViewController: PHPickerViewController,
    context: UIViewControllerRepresentableContext<PHPickerView>){
         
    }

### カメラとフォトライブラリーの選択画面

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
.actionSheet(isPresented: $isShowAction){
    ActionSheet(title: Text("確認"),
                message: Text("選択してください"),
                buttons: [
                    .default(Text("カメラ"), action: {
                        isPhotolibrary = false
                         
                        if UIImagePickerController.isSourceTypeAvailable(.camera){
                            print("カメラは利用できます")
                            isShowSheet = true
                        } else {
                            print("カメラは利用できません")
                        }
                    }),
                    .default(Text("フォトライブラリー"), action: {
                        isPhotolibrary = true
                        isShowSheet = true
                    }),
                    .cancel()
                ])
}

なるほど、カメラを使えると中々面白い