2024-07-25 16:05:06
浏览数 (3)
延时后一次执行
示例代码
代码语言：python
代码运行次数：0
复制import sys
from datetime import datetime
from PySide6.QtCore import Qt, QTimer
from PySide6.QtWidgets import QApplication, QLabel, QMainWindow, QPushButton, QVBoxLayout, QWidget
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.setGeometry(300, 300, 250, 150)
self.setWindowTitle('QTimer Example')
self.button = QPushButton('START SINGLE-SHOT')
self.button.clicked.connect(self.init_label)
self.label = QLabel(f'Hello, PySide6! {datetime.now().strftime("%Y-%m-%d %H:%M:%S")}')
self.label.setAlignment(Qt.AlignmentFlag.AlignHCenter | Qt.AlignmentFlag.AlignVCenter)
self.layout = QVBoxLayout()
self.layout.addWidget(self.button)
self.layout.addWidget(self.label)
container = QWidget()
container.setLayout(self.layout)
self.setCentralWidget(container)
self.trigger_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
self.delay_time = 2000
self.timer = QTimer(self)
self.timer.timeout.connect(self.update_time)
def update_time(self):
self.label.setText(f'Trigger@{self.trigger_time}nSingleShot@{datetime.now().strftime("%Y-%m-%d %H:%M:%S")}')
self.button.setCheckable(True)
self.button.setHidden(False)
def init_label(self):
self.label.setText(f'wait {self.delay_time} milli-seconds')
self.button.setCheckable(False)
self.button.setHidden(True)
self.trigger_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
# 设置延时时间与触发的槽函数
self.timer.singleShot(self.delay_time, self.update_time)
if __name__ == '__main__':
app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec())
运行效果
定时器延时一次执行定时器周期性执行
示例代码
代码语言：python
代码运行次数：0
复制import sys
from datetime import datetime
from PySide6.QtCore import Qt, QTimer
from PySide6.QtWidgets import QApplication, QLabel, QLineEdit, QMainWindow, QPushButton, QVBoxLayout, QWidget
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.setWindowTitle('QTimer Example')
self.input_line = QLineEdit()
self.input_line.setPlaceholderText('请输入定时器级间隔周期,单位为秒,如 1 代表每隔 1 秒运行一次')
self.input_line.returnPressed.connect(self.check_input)
self.push_button = QPushButton('停止定时器')
self.push_button.clicked.connect(self.end_timer)
self.label = QLabel('Hello, PySide6 QTimer!')
self.label.setAlignment(Qt.AlignmentFlag.AlignHCenter | Qt.AlignmentFlag.AlignVCenter)
self.wait_timer_label = QLabel('Wait To Start')
self.wait_timer_label.setAlignment(Qt.AlignmentFlag.AlignHCenter | Qt.AlignmentFlag.AlignVCenter)
self.layout = QVBoxLayout()
self.layout.addWidget(self.input_line)
self.layout.addWidget(self.push_button)
self.layout.addWidget(self.label)
self.layout.addWidget(self.wait_timer_label)
container = QWidget()
container.setLayout(self.layout)
self.trigger_count = 0
self.wait_second_count = 0
self.wait_timer = QTimer()
self.wait_timer.timeout.connect(self.wait_to_start)
self.wait_timer.setInterval(1000) # 默认每秒执行一次
self.setCentralWidget(container)
def wait_to_start(self):
self.wait_timer_label.setText(f'等待 {self.wait_second_count} 秒')
if self.wait_second_count <= 0:
self.update_time()
self.wait_second_count = int(self.input_line.text()) - 1
return
self.wait_second_count -= 1
def check_input(self):
input_interval = self.input_line.text()
if not str.isalnum(input_interval):
self.label.setText(f'非法的间隔周期：{input_interval}, 请输入整数')
else:
internal = int(input_interval)
if internal <= 0 or internal > 5:
self.label.setText(f'非法的间隔周期：{input_interval}, 合法范围：[1, 5]')
else:
self.input_line.setReadOnly(True)
self.input_line.setDisabled(True)
self.wait_second_count = int(self.input_line.text()) - 1
self.push_button.setEnabled(True)
self.wait_timer.start() # 等待定时器开始工作
# 定时器触发
def update_time(self):
self.trigger_count = 1
self.label.setText(f'定时器第{self.trigger_count}次触发@{datetime.now().strftime("%Y-%m-%d %H:%M:%S")}')
# 停止定时器
def end_timer(self):
self.wait_timer.stop()
self.wait_second_count = 0
self.input_line.setReadOnly(False)
self.input_line.setEnabled(True)
self.trigger_count = 0
self.label.setText(f'定时器停止时间@{datetime.now().strftime("%Y-%m-%d %H:%M:%S")}')
self.wait_timer_label.setText(f'Wait To Start')
self.push_button.setDisabled(True)
if __name__ == '__main__':
app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec())
运行效果
定时器周期性运行
