diff --git a/日记应用开发.py b/日记应用开发.py
new file mode 100644
index 0000000..1f08b95
--- /dev/null
+++ b/日记应用开发.py
@@ -0,0 +1,185 @@
+import sys
+import os
+from PyQt5.QtWidgets import (QApplication, QMainWindow, QWidget, QLabel, QLineEdit, QTextEdit, QPushButton, QMessageBox,
+                             QVBoxLayout, QHBoxLayout, QListWidget, QStackedWidget)
+from PyQt5.QtCore import Qt
+from datetime import datetime
+
+class MainApp(QMainWindow):
+    def __init__(self):
+        super().__init__()
+        self.setWindowTitle("日记应用")
+        self.setGeometry(100, 100, 600, 400)
+
+        self.initUI()
+
+    def initUI(self):
+        # 创建主窗口的小部件
+        self.central_widget = QWidget()
+        self.setCentralWidget(self.central_widget)
+
+        # 创建顶部的功能按钮
+        self.button_write = QPushButton("写日记")
+        self.button_view = QPushButton("查看日记")
+        self.button_delete = QPushButton("删除日记")
+
+        self.button_write.clicked.connect(self.show_write_diary)
+        self.button_view.clicked.connect(self.show_view_diary)
+        self.button_delete.clicked.connect(self.show_delete_diary)
+
+        # 布局顶部的按钮
+        top_layout = QHBoxLayout()
+        top_layout.addWidget(self.button_write)
+        top_layout.addWidget(self.button_view)
+        top_layout.addWidget(self.button_delete)
+
+        # 创建堆叠小部件
+        self.stacked_widget = QStackedWidget()
+        self.stacked_widget.addWidget(self.create_write_diary_widget())
+        self.stacked_widget.addWidget(self.create_view_diary_widget())
+        self.stacked_widget.addWidget(self.create_delete_diary_widget())
+
+        # 设置主布局
+        main_layout = QVBoxLayout()
+        main_layout.addLayout(top_layout)
+        main_layout.addWidget(self.stacked_widget)
+        self.central_widget.setLayout(main_layout)
+
+    #写日记
+    def create_write_diary_widget(self):
+        widget = QWidget()
+
+        label_date = QLabel("日期：")
+        self.entry_date = QLineEdit()
+
+        label_title = QLabel("标题：")
+        self.entry_title = QLineEdit()
+
+        label_content = QLabel("内容：")
+        self.text_content = QTextEdit()
+
+        label_mood = QLabel("心情：")
+        self.entry_mood = QLineEdit()
+
+        button_save = QPushButton("保存")
+        button_save.clicked.connect(self.save_diary)
+
+        button_clear = QPushButton("清空")
+        button_clear.clicked.connect(self.clear_entries)
+
+        layout = QVBoxLayout()
+        layout.addWidget(label_date)
+        layout.addWidget(self.entry_date)
+        layout.addWidget(label_title)
+        layout.addWidget(self.entry_title)
+        layout.addWidget(label_content)
+        layout.addWidget(self.text_content)
+        layout.addWidget(label_mood)
+        layout.addWidget(self.entry_mood)
+        layout.addWidget(button_save)
+        layout.addWidget(button_clear)
+
+        widget.setLayout(layout)
+        return widget
+
+
+    #查看日记
+    def create_view_diary_widget(self):
+        widget = QWidget()
+
+        self.diary_list = QListWidget()
+        self.diary_list.itemClicked.connect(self.display_diary)
+
+        self.diary_display = QTextEdit()
+        self.diary_display.setReadOnly(True)
+
+        layout = QHBoxLayout()
+        layout.addWidget(self.diary_list, 1)
+        layout.addWidget(self.diary_display, 2)
+
+        widget.setLayout(layout)
+        return widget
+
+    #删除日记
+    def create_delete_diary_widget(self):
+        widget = QWidget()
+
+        self.delete_diary_list = QListWidget()
+        self.delete_diary_list.itemClicked.connect(self.confirm_delete_diary)
+
+        layout = QVBoxLayout()
+        layout.addWidget(self.delete_diary_list)
+
+        widget.setLayout(layout)
+        return widget
+
+    def show_write_diary(self):
+        self.stacked_widget.setCurrentIndex(0)
+
+    def show_view_diary(self):
+        self.update_diary_list()
+        self.stacked_widget.setCurrentIndex(1)
+
+    def show_delete_diary(self):
+        self.update_delete_diary_list()
+        self.stacked_widget.setCurrentIndex(2)
+
+    def save_diary(self):
+        date = self.entry_date.text()
+        title = self.entry_title.text()
+        content = self.text_content.toPlainText()
+        mood = self.entry_mood.text()
+        if not date or not title or not content:
+            QMessageBox.warning(self, "错误", "日期、标题和内容不能为空")
+            return
+
+        current_time = datetime.now().strftime("%Y-%m-%d-%H-%M-%S")
+        file_name = f"{current_time}.txt"
+
+        with open(file_name, "w") as f:
+            f.write(f"日期：{date}\n")
+            f.write(f"标题：{title}\n")
+            f.write(f"内容：{content}\n")
+            f.write(f"心情：{mood}\n\n")
+
+        reply = QMessageBox.question(self, "提示", f"日记保存成功：{file_name}\n是否继续写日记？",
+                                      QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
+        if reply == QMessageBox.Yes:
+            self.clear_entries()
+        else:
+            self.close()
+
+    def clear_entries(self):
+        self.entry_date.clear()
+        self.entry_title.clear()
+        self.text_content.clear()
+        self.entry_mood.clear()
+
+    def update_diary_list(self):
+        self.diary_list.clear()
+        for file_name in os.listdir():
+            if file_name.endswith(".txt"):
+                self.diary_list.addItem(file_name)
+
+    def display_diary(self, item):
+        with open(item.text(), "r") as f:
+            content = f.read()
+        self.diary_display.setText(content)
+
+    def update_delete_diary_list(self):
+        self.delete_diary_list.clear()
+        for file_name in os.listdir():
+            if file_name.endswith(".txt"):
+                self.delete_diary_list.addItem(file_name)
+
+    def confirm_delete_diary(self, item):
+        reply = QMessageBox.question(self, "确认", f"确定要删除日记：{item.text()}?", QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
+        if reply == QMessageBox.Yes:
+            os.remove(item.text())
+            self.update_delete_diary_list()
+
+if __name__ == "__main__":
+    app = QApplication(sys.argv)
+    window = MainApp()
+    window.show()
+    sys.exit(app.exec_())