格式化日志页面添加完成按钮

Note/FormatLogViewController.swift

@@ -11,6 +11,7 @@ class FormatLogViewController: UIViewController {
 
     private var textView: UITextView!
     private var formatButton: UIButton!
+    private var doneButton: UIBarButtonItem!
 
     override func viewDidLoad() {
         super.viewDidLoad()
@@ -27,8 +28,11 @@ class FormatLogViewController: UIViewController {
         textView.backgroundColor = .white
         textView.layer.cornerRadius = 12
         textView.textContainerInset = UIEdgeInsets(top: 12, left: 12, bottom: 12, right: 12)
+        textView.delegate = self
         view.addSubview(textView)
 
+        doneButton = UIBarButtonItem(title: "完成", style: .prominent, target: self, action: #selector(didTapDoneButton))
+
         formatButton = UIButton(type: .system)
         formatButton.translatesAutoresizingMaskIntoConstraints = false
         formatButton.setTitle("格式化", for: .normal)
@@ -50,4 +54,19 @@ class FormatLogViewController: UIViewController {
             formatButton.heightAnchor.constraint(equalToConstant: 52)
         ])
     }
+
+    @objc private func didTapDoneButton() {
+        textView.resignFirstResponder()
+    }
+}
+
+extension FormatLogViewController: UITextViewDelegate {
+
+    func textViewDidBeginEditing(_ textView: UITextView) {
+        navigationItem.rightBarButtonItem = doneButton
+    }
+
+    func textViewDidEndEditing(_ textView: UITextView) {
+        navigationItem.rightBarButtonItem = nil
+    }
 }