self.value_widget = QWidget(self) self.value_widget.setGeometry(500, 150, 200, 300) # self.value_widget.setStyleSheet(''' # background-color: #f2f2f2; # border-radius: 10px; # border: 2px solid #ccc; # padding: 10px; # ''') self.value_widget.setStyleSheet("QLCDNumber {background-color: white; color: black; border: 2px solid gray;" " border-radius: 5px; font-size: 48px; font-weight: bold;}") self.value_widget.setStyleSheet("QLabel {font-size: 100px; font-weight: bold;}") self.lcd_1 = QLCDNumber(self.value_widget) self.lcd_1.setFixedSize(400, 150) self.lcd_1.setSegmentStyle(QLCDNumber.Flat) self.lcd_1.setDigitCount(15) self.lcd_1.display('0 KG') self.value_widget.setStyleSheet("QLCDNumber {background-color: white; color: black; border: 2px solid gray;" " border-radius: 5px; font-size: 80px; font-weight: bold;}" # 修改QLCDNumber的样式 "QLabel {font-size: 100px; font-weight: bold;}") lcd_label = QLabel(self.value_widget) lcd_label.setText("称重信息：") lcd_label.setStyleSheet("QLabel {font-size: 36px; font-weight: bold;}") hbox_layout = QHBoxLayout(self.value_widget) hbox_layout.addStretch() hbox_layout.addWidget(self.lcd_1) hbox_layout.addWidget(lcd_label) hbox_layout.addStretch() hbox_layout.setContentsMargins(20, 0, 20, 0) hbox_layout.setSpacing(60)这段代码为什么信息显示不全

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class LoginWindow(QWidget): def init(self): super().init() self.initUI() def initUI(self): self.setFixedSize(800, 500) self.setWindowTitle('鸡爪称重系统') # 创建一个QStackedWidget控件 self.stacked_widget = QStackedWidget(self) self.stacked_widget.setGeometry(0, 0, 800, 500) # 创建Login界面 login_widget = QWidget() self.stacked_widget.addWidget(login_widget) # 在Login界面上创建一个按钮 button = QPushButton('开始称重', login_widget) button.move(100, 100) button.setGeometry(300, 200, 200, 50) button.clicked.connect(self.startWeighing) def startWeighing(self): # 创建一个新的QWidget info_widget = QWidget(self.stacked_widget) # 将info_widget添加到QStackedWidget中 self.stacked_widget.addWidget(info_widget) # 切换到新的QWidget self.stacked_widget.setCurrentWidget(info_widget) self.info_label = QLabel("员工信息", self) self.info_label.move(100, 50) self.info_label.setStyleSheet("font-size: 24px; color: black; background-color: #eee; border-radius: 10px;") self.id_label = QLabel("员工ID：", self) self.id_label.move(70, 100) self.id_label.setStyleSheet("font-size: 18px; color: black;") self.name_label = QLabel("姓名：", self) self.name_label.move(70, 150) self.name_label.setStyleSheet("font-size: 18px; color: black;") self.six_label = QLabel("性别：", self) self.six_label.move(70, 200) self.six_label.setStyleSheet("font-size: 18px; color: black;") self.sfz_label = QLabel("身份证：", self) self.sfz_label.move(70, 250) self.sfz_label.setStyleSheet("font-size: 18px; color: black;") self.tel_label = QLabel("电话：", self) self.tel_label.move(70, 300) self.tel_label.setStyleSheet("font-size: 18px; color: black;") self.setFixedSize(800, 500) self.setWindowTitle('员工信息') # 创建数字显示框和外框 value_widget = QWidget(self) value_widget.setGeometry(500, 100, 200, 100) self.lcd_1 = QLCDNumber(value_widget) self.lcd_1.setSegmentStyle(QLCDNumber.Flat) self.lcd_1.setDigitCount(10) self.lcd_1.display('0 KG') # self.thread = DataThread() # self.thread.valueUpdated.connect(self.lcd_1.display) # self.thread.start() hbox_layout = QHBoxLayout(value_widget) hbox_layout.addWidget(self.lcd_1) hbox_layout.setContentsMargins(0, 0, 0, 0) hbox_layout.setSpacing(0) value_widget.setStyleSheet(''' background-color: #eee; border-radius: 10px; border: 2px solid black; ''') # 创建返回按钮 back_button = QPushButton('返回', self) back_button.setGeometry(600, 400, 100, 50) back_button.clicked.connect(self.backToLoginWindow) # 设置窗口大小和标题 self.setFixedSize(800, 500) self.setWindowTitle('员工信息') def backToLoginWindow(self): self.stacked_widget.setCurrentIndex(0)没有显示label

value_widget.setGeometry(500, 100, 200, 100) self.lcd_1 = QLCDNumber(value_widget) self.lcd_1.setSegmentStyle(QLCDNumber.Flat) self.lcd_1.setDigitCount(10) self.lcd_1.display('0 KG') hbox_...

value_widget = QWidget(self) value_widget.setGeometry(500, 100, 200, 100) self.lcd_1 = QLCDNumber(value_widget) self.lcd_1.setSegmentStyle(QLCDNumber.Flat) self.lcd_1.setDigitCount(10) self.lcd_1.display(0.123456789) hbox_layout = QHBoxLayout(value_widget) hbox_layout.addWidget(self.lcd_1) hbox_layout.setContentsMargins(0, 0, 0, 0) hbox_layout.setSpacing(0) value_widget.setStyleSheet(''' background-color: #eee; border-radius: 10px; border: 2px solid black; ''') # 创建返回按钮 back_button = QPushButton('返回', self) back_button.setGeometry(600, 400, 100, 50) back_button.clicked.connect(self.backToLoginWindow) # 设置窗口大小和标题 self.setFixedSize(800, 500) self.setWindowTitle('员工信息') def backToLoginWindow(self): self.stacked_widget.setCurrentIndex(0) def get_data(self): ser = serial.Serial('COM3', 9600) data = ser.readline() if data: # 将字符串按空格分割，并取第三个元素作为数值 value_str = data.decode().strip().split()[1] value = float(value_str) ser.close() # 将数值设置给 QLCDNumber 控件 self.lcd_1.display(value)怎么设置默认显示0，当get_data返回数据时，显示

self.lcd_1 = QLCDNumber(value_widget) self.lcd_1.setSegmentStyle(QLCDNumber.Flat) self.lcd_1.setDigitCount(10) self.lcd_1.display(0) # 初始化时显示 0 然后在 get_data 函数中，将读取到的值设置给 ...

class EmployeeInfoWindow(QWidget): def init(self, user_id, stacked_widget): super().init() self.user_id = user_id self.stacked_widget = stacked_widget self.initUI() def initUI(self): # 连接数据库，获取员工信息 conn = pymysql.connect(host='39.99.214.172', user='root', password='Solotion.123', database='jj_tset') cursor = conn.cursor() cursor.execute("SELECT * FROM employee_table WHERE user_id='%s'" % self.user_id) result = cursor.fetchone() conn.close() # 创建用于显示员工信息的控件 info_label = QLabel("员工信息", self) info_label.move(100, 50) info_label.setStyleSheet("font-size: 24px; color: black; background-color: #eee; border-radius: 10px;") id_label = QLabel("员工ID：" + result[0], self) id_label.move(70, 100) id_label.setStyleSheet("font-size: 18px; color: black;") name_label = QLabel("姓名：" + str(result[1]), self) name_label.move(70, 150) name_label.setStyleSheet("font-size: 18px; color: black;") six_label = QLabel("性别：" + result[2], self) six_label.move(70, 200) six_label.setStyleSheet("font-size: 18px; color: black;") sfz_label = QLabel("身份证：" + str(result[3]), self) sfz_label.move(70, 250) sfz_label.setStyleSheet("font-size: 18px; color: black;") tel_label = QLabel("电话：" + result[4], self) tel_label.move(70, 300) tel_label.setStyleSheet("font-size: 18px; color: black;") # 创建数字显示框 self.value_label = QLabel(self) self.value_label.setGeometry(500, 100, 200, 50) self.value_label.setStyleSheet("font-size: 24px; color: black; background-color: #eee; border-radius: 10px;") self.lcd_1 = QLCDNumber(self) # 2 self.lcd_1.setSegmentStyle(QLCDNumber.Flat) # self.lcd_2.setSmallDecimalPoint(True) self.lcd_1.setDigitCount(10) self.lcd_1.display(0.123456789) self.v_layout = QVBoxLayout() self.v_layout.addWidget(self.lcd_1) self.setLayout(self.v_layout) # 创建返回按钮 back_button = QPushButton('返回', self) back_button.setGeometry(600, 400, 100, 50) back_button.clicked.connect(self.backToLoginWindow) # 设置窗口大小和标题 self.setFixedSize(800, 500) self.setWindowTitle('员工信息')调整lcd_1在右边，数字显示加外框

value_widget.setGeometry(500, 100, 200, 50) self.lcd_1 = QLCDNumber(value_widget) self.lcd_1.setSegmentStyle(QLCDNumber.Flat) self.lcd_1.setDigitCount(10) self.lcd_1.display(0.123456789) hbox_...

def startWeighing(self): next_widget = QWidget() self.stacked_widget.addWidget(next_widget) # 添加一个QLabel控件用于显示信息 self.info_label = QLabel("员工信息", next_widget) self.info_label.move(100, 50) self.info_label.setStyleSheet("font-size: 24px; color: black; background-color: #eee; border-radius: 10px;") self.id_label = QLabel("员工ID：", next_widget) self.id_label.move(70, 100) self.id_label.setStyleSheet("font-size: 18px; color: black;") self.name_label = QLabel("姓名：", next_widget) self.name_label.move(70, 150) self.name_label.setStyleSheet("font-size: 18px; color: black;") # 创建数字显示框和外框 value_widget = QWidget(next_widget) value_widget.setGeometry(500, 100, 200, 100) # self.stacked_widget.addWidget(value_widget) self.lcd_1 = QLCDNumber(value_widget) self.lcd_1.setSegmentStyle(QLCDNumber.Flat) self.lcd_1.setDigitCount(10) self.lcd_1.display('0 ') hbox_layout = QHBoxLayout(value_widget) hbox_layout.addWidget(self.lcd_1) hbox_layout.setContentsMargins(0, 0, 0, 0) hbox_layout.setSpacing(0) # 切换到下一个界面 self.stacked_widget.setCurrentWidget(next_widget)怎么将获取的到串口数据更新到数字框内

def update_lcd(self, value): self.lcd_1.display(value) 然后在串口数据接收函数中调用该方法即可： def serial_data_received(self): data = self.serial.readAll().data().decode() # 处理获取到的...

class EmployeeInfoWindow(QWidget): def init(self, user_id, stacked_widget): super().init() self.user_id = user_id self.stacked_widget = stacked_widget self.initUI() def initUI(self): # 连接数据库，获取员工信息 conn = pymysql.connect(host='39.99.214.172', user='root', password='Solotion.123', database='jj_tset') cursor = conn.cursor() cursor.execute("SELECT * FROM employee_table WHERE user_id='%s'" % self.user_id) result = cursor.fetchone() conn.close() # 创建用于显示员工信息的控件 info_label = QLabel("员工信息", self) info_label.move(100, 50) info_label.setStyleSheet("font-size: 24px; color: black; background-color: #eee; border-radius: 10px;") id_label = QLabel("员工ID：" + result[0], self) id_label.move(70, 100) id_label.setStyleSheet("font-size: 18px; color: black;") name_label = QLabel("姓名：" + str(result[1]), self) name_label.move(70, 150) name_label.setStyleSheet("font-size: 18px; color: black;") six_label = QLabel("性别：" + result[2], self) six_label.move(70, 200) six_label.setStyleSheet("font-size: 18px; color: black;") sfz_label = QLabel("身份证：" + str(result[3]), self) sfz_label.move(70, 250) sfz_label.setStyleSheet("font-size: 18px; color: black;") tel_label = QLabel("电话：" + result[4], self) tel_label.move(70, 300) tel_label.setStyleSheet("font-size: 18px; color: black;") # 创建数字显示框和外框 value_widget = QWidget(self) value_widget.setGeometry(500, 100, 200, 100) self.lcd_1 = QLCDNumber(value_widget) self.lcd_1.setSegmentStyle(QLCDNumber.Flat) self.lcd_1.setDigitCount(10) self.lcd_1.display(0.123456789) hbox_layout = QHBoxLayout(value_widget) hbox_layout.addWidget(self.lcd_1) hbox_layout.setContentsMargins(0, 0, 0, 0) hbox_layout.setSpacing(0) value_widget.setStyleSheet(''' background-color: #eee; border-radius: 10px; border: 2px solid black; ''') # 创建返回按钮 back_button = QPushButton('返回', self) back_button.setGeometry(600, 400, 100, 50) back_button.clicked.connect(self.backToLoginWindow) # 设置窗口大小和标题 self.setFixedSize(800, 500) self.setWindowTitle('员工信息')怎么让lcd_1显示def get_data(): ser = serial.Serial('COM3', 9600) data = ser.readline() if data: # 将字符串按空格分割，并取第三个元素作为数值 value_str = data.decode().strip().split()[1] value = float(value_str) ser.close() return value

self.stacked_widget = stacked_widget self.initUI() # 创建一个 QTimer 对象，每 500 毫秒触发一次 timeout 事件 self.timer = QTimer(self) self.timer.timeout.connect(self.update_lcd) self.timer.start...

怎么把class DataThread(QThread): valueUpdated = pyqtSignal(float) # 只获取一次串口数据 def run(self): ser = serial.Serial('COM3', 9600) data = ser.readline() if data: # 将字符串按空格分割，并取第三个元素作为数值 value_str = data.decode().strip().split()[1] value = float(value_str) self.valueUpdated.emit(value) ser.close()返回的数据更新到value_widget = QWidget(next_widget) value_widget.setGeometry(500, 100, 200, 100) # self.stacked_widget.addWidget(value_widget) self.lcd_1 = QLCDNumber(value_widget) self.lcd_1.setSegmentStyle(QLCDNumber.Flat) self.lcd_1.setDigitCount(10) self.lcd_1.display('0 ') hbox_layout = QHBoxLayout(value_widget) hbox_layout.addWidget(self.lcd_1) hbox_layout.setContentsMargins(0, 0, 0, 0) hbox_layout.setSpacing(0)数据库中

要将DataThread类中发射的信号valueUpdated连接到更新数据库的函数中，可以在主线程中使用以下代码： data_thread = DataThread() data_thread.valueUpdated.connect(update_database) data_thread.start() ...

# 创建数字显示框和外框 value_widget = QWidget(self) value_widget.setGeometry(500, 100, 200, 100) self.lcd_1 = QLCDNumber(value_widget) self.lcd_1.setSegmentStyle(QLCDNumber.Flat) self.lcd_1.setDigitCount(10) self.lcd_1.display(0.123456789) hbox_layout = QHBoxLayout(value_widget) hbox_layout.addWidget(self.lcd_1) hbox_layout.setContentsMargins(0, 0, 0, 0) hbox_layout.setSpacing(0) value_widget.setStyleSheet(''' background-color: #eee; border-radius: 10px; border: 2px solid black; ''') # 创建返回按钮 back_button = QPushButton('返回', self) back_button.setGeometry(600, 400, 100, 50) back_button.clicked.connect(self.backToLoginWindow) # 设置窗口大小和标题 self.setFixedSize(800, 500) self.setWindowTitle('员工信息') def backToLoginWindow(self): self.stacked_widget.setCurrentIndex(0) def get_data(self): ser = serial.Serial('COM3', 9600) data = ser.readline() if data: # 将字符串按空格分割，并取第三个元素作为数值 value_str = data.decode().strip().split()[1] value = float(value_str) ser.close() # 将数值设置给 QLabel 控件 self.value_label.setText("数值：" + str(value)) def update_lcd(self): value = self.get_data self.lcd_1.display(value)报错TypeError: arguments did not match any overloaded call: display(self, str: str): argument 1 has unexpected type 'method' display(self, num: float): argument 1 has unexpected type 'method' display(self, num: int): argument 1 has unexpected type 'method'

在 update_lcd 函数中，你调用了 get_data 函数，但是没有加上括号，导致返回的是函数本身而不是函数返回值。你需要修改 update_lcd 函数中的代码，将 get_... value = self.get_data() self.lcd_1.display(value)

class EmployeeInfoWindow(QWidget): def init(self, user_id, stacked_widget): super().init() self.user_id = user_id self.stacked_widget = stacked_widget self.initUI() def initUI(self): # 连接数据库，获取员工信息 conn = pymysql.connect(host='39.99.214.172', user='root', password='Solotion.123', database='jj_tset') cursor = conn.cursor() cursor.execute("SELECT * FROM employee_table WHERE user_id='%s'" % self.user_id) result = cursor.fetchone() conn.close() # 创建用于显示员工信息的控件 info_label = QLabel("员工信息", self) info_label.move(100, 50) info_label.setStyleSheet("font-size: 24px; color: black; background-color: #eee; border-radius: 10px;") id_label = QLabel("员工ID：" + result[0], self) id_label.move(70, 100) id_label.setStyleSheet("font-size: 18px; color: black;") name_label = QLabel("姓名：" + str(result[1]), self) name_label.move(70, 150) name_label.setStyleSheet("font-size: 18px; color: black;") six_label = QLabel("性别：" + result[2], self) six_label.move(70, 200) six_label.setStyleSheet("font-size: 18px; color: black;") sfz_label = QLabel("身份证：" + str(result[3]), self) sfz_label.move(70, 250) sfz_label.setStyleSheet("font-size: 18px; color: black;") tel_label = QLabel("电话：" + result[4], self) tel_label.move(70, 300) tel_label.setStyleSheet("font-size: 18px; color: black;") # 创建返回按钮 back_button = QPushButton('返回', self) back_button.setGeometry(600, 400, 100, 50) back_button.clicked.connect(self.backToLoginWindow) # 设置窗口大小和标题 self.setFixedSize(800, 500) self.setWindowTitle('员工信息') def backToLoginWindow(self): self.stacked_widget.setCurrentIndex(0)在员工信息界面右边设置数字显示框，接收显示def get_data(): ser = serial.Serial('COM3', 9600) data = ser.readline() if data: # 将字符串按空格分割，并取第三个元素作为数值 value_str = data.decode().strip().split()[1] value = float(value_str) ser.close() return value

self.value_label.setGeometry(500, 100, 200, 50) self.value_label.setStyleSheet("font-size: 24px; color: black; background-color: #eee; border-radius: 10px;") # 创建返回按钮 back_button = ...

pyqt5 读取sql3数据库database1，并将其中的数据库表history_data_table显示到QTableWidget中，并实现对数据库表的增删改查功能

value = self.table_widget.item(row, 2).text() # 创建对话框 dialog = QDialog(self) dialog.setWindowTitle("Update Data") # 创建文本框和按钮 line_edit_date = QLineEdit(date) line_edit_value = ...

用python设计一个gui界面，点击打开图片再点击相关按钮可以实现彩色转灰度图、调暗、调亮、直方图均衡化，图像平移、旋转、仿射、插值缩放、透视，加噪、去噪、图像分割、图像特征点匹配

self.setGeometry(100, 100, 800, 600) # menu bar menubar = self.menuBar() file_menu = menubar.addMenu('File') open_action = QAction('Open', self) open_action.triggered.connect(self.open_file) ...

用Python写一段长代码结合PyQt、matplotlib、numpy，可生成多种信号并显示出来，显示信号的频谱。 1、首先要有一个良好的用户交互界面 2、可生成正弦波、三角波、方波，可在界面调试信号的频率、幅度，使信号的波形发生变化并显示出来。 3、可显示信号的频谱。 4、与程序进行交互，选择信号的某个数据点后可显示该信息点的其他信号信息。 5、可以对几个信号进行同时显示并实现信号合成，最后显示合成的信号。

self.setGeometry(100, 100, 800, 600) self.initUI() def initUI(self): self.figure = plt.Figure() self.canvas = FigureCanvas(self.figure) self.ax_waveform = self.figure.add_subplot(211) self.ax...

pyqt5 实时画饼图

self.setGeometry(100, 100, 500, 500) self.centralwidget = QWidget(self) self.layout = QVBoxLayout(self.centralwidget) self.chart = QChart() self.chart_view = QChartView(self.chart) self.layout....

用python写一边录音一边播放一边显示FFT波形的三线程pyqt5程序

self.setGeometry(200, 200, 800, 600) self.widget = QWidget() self.setCentralWidget(self.widget) self.layout = QVBoxLayout() self.widget.setLayout(self.layout) self.spectrum = np.zeros(256) # ...

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