修复键盘弹起时遮挡底部文本的问题

2026-07-13 21:30:10 +08:00
parent d4783d7438
commit 51fb757143
2 changed files with 66 additions and 0 deletions
@@ -30,6 +30,11 @@ class FormatNoteViewController: UIViewController {
        navigationItem.largeTitleDisplayMode = .never
        view.backgroundColor = .systemGroupedBackground
        setupUI()
+        setupKeyboardObservers()
+    }
+
+    deinit {
+        NotificationCenter.default.removeObserver(self)
    }

    private func setupUI() {
@@ -101,6 +106,34 @@ class FormatNoteViewController: UIViewController {
        textView.resignFirstResponder()
    }

+    private func setupKeyboardObservers() {
+        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: UIResponder.keyboardWillShowNotification, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: UIResponder.keyboardWillHideNotification, object: nil)
+    }
+
+    @objc private func keyboardWillShow(_ notification: Notification) {
+        guard let keyboardFrame = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect else { return }
+        let keyboardFrameInView = view.convert(keyboardFrame, from: nil)
+        let intersection = keyboardFrameInView.intersection(view.bounds)
+        let keyboardHeight = intersection.height
+
+        let duration = notification.userInfo?[UIResponder.keyboardAnimationDurationUserInfoKey] as? TimeInterval ?? 0.25
+
+        UIView.animate(withDuration: duration, delay: 0, options: .beginFromCurrentState) {
+            self.textView.contentInset.bottom = keyboardHeight
+            self.textView.verticalScrollIndicatorInsets.bottom = keyboardHeight
+        }
+    }
+
+    @objc private func keyboardWillHide(_ notification: Notification) {
+        let duration = notification.userInfo?[UIResponder.keyboardAnimationDurationUserInfoKey] as? TimeInterval ?? 0.25
+
+        UIView.animate(withDuration: duration, delay: 0, options: .beginFromCurrentState) {
+            self.textView.contentInset.bottom = 0
+            self.textView.verticalScrollIndicatorInsets.bottom = 0
+        }
+    }
+
    @objc private func didTapPasteButton() {
        if let string = UIPasteboard.general.string {
            textView.text = string