打开文件改为跳转系统文件应用

Note/ViewController.swift

@@ -6,7 +6,6 @@
 //
 
 import UIKit
-import UniformTypeIdentifiers
 
 class ViewController: UIViewController {
 
@@ -97,48 +96,23 @@ extension ViewController: UITableViewDelegate {
             let viewController = FormatNoteViewController()
             navigationController?.pushViewController(viewController, animated: true)
         case "打开文件":
-            openFiles()
+            openFilesApp()
         default:
             break
         }
     }
 
     private func openSystemNotesApp() {
-        guard let url = URL(string: "mobilenotes://") else { return }
+        openURLIfPossible("mobilenotes://")
+    }
+
+    private func openFilesApp() {
+        openURLIfPossible("shareddocuments://")
+    }
+
+    private func openURLIfPossible(_ string: String) {
+        guard let url = URL(string: string) else { return }
         guard UIApplication.shared.canOpenURL(url) else { return }
         UIApplication.shared.open(url, options: [:], completionHandler: nil)
     }
-
-    private func openFiles() {
-        let documentPicker = UIDocumentPickerViewController(forOpeningContentTypes: [.item], asCopy: true)
-        documentPicker.delegate = self
-        documentPicker.allowsMultipleSelection = false
-        present(documentPicker, animated: true)
-    }
-}
-
-extension ViewController: UIDocumentPickerDelegate {
-
-    func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
-        guard let url = urls.first else { return }
-        let fileName = url.lastPathComponent
-
-        var message: String?
-        if let data = try? Data(contentsOf: url),
-           let text = String(data: data, encoding: .utf8),
-           !text.isEmpty {
-            message = text
-        } else {
-            let attributes = try? FileManager.default.attributesOfItem(atPath: url.path)
-            let size = attributes?[.size] as? Int64 ?? 0
-            message = "无法以文本预览\n大小: \(size) 字节"
-        }
-
-        let alert = UIAlertController(title: fileName, message: message, preferredStyle: .alert)
-        alert.addAction(UIAlertAction(title: "确定", style: .default))
-        present(alert, animated: true)
-    }
-
-    func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
-    }
 }