如何让 PyQt5 窗口在 30 秒后自动关闭,并且仍然保持窗口响应交互?
我正在创建一个休眠 30 秒的线程,然后它调用close()
窗口的函数。现在,代码挂在self.close()
:
Exception in thread Thread-1:
Traceback (most recent call last):
File "C:\Users\fredrik\.conda\envs\pysidedev_py27\lib\threading.py", line 801, in __bootstrap_inner
self.run()
File "C:\Users\fredrik\.conda\envs\pysidedev_py27\lib\threading.py", line 754, in run
self.__target(*self.__args, **self.__kwargs)
File "C:\Users\fredrik\Desktop\timer.py", line 47, in <lambda>
my_win.execute_function_threaded(func=lambda: my_win.auto_close(n=3))
File "C:\Users\fredrik\Desktop\timer.py", line 36, in auto_close
self.close() # hangs
RuntimeError: Internal C++ object (MyWindow) already deleted.
我还尝试将线程移出窗口对象,但我仍然遇到挂起window.close()
。
我究竟做错了什么?
代码必须适用于 Python 2.7 和 3.5。
import sys
import time
from threading import Thread
try:
from PyQt5 import QtWidgets
except ImportError:
try:
from PySide2 import QtWidgets
except ImportError:
try:
from PyQt4 import QtGui as QtWidgets
except ImportError:
try:
from PySide import QtGui as QtWidgets
except ImportError:
print('giving up!')
class MyWindow(QtWidgets.QMainWindow):
"""Auto-closing window"""
def __init__(self, parent=None):
super(MyWindow, self).__init__(parent)
def closeEvent(self, event):
"""Delete object when closed"""
self.deleteLater()
def auto_close(self, n):
"""Close self in n seconds"""
print('going to sleep')
for i in range(n):
print('sleeping...')
time.sleep(1)
print('done sleeping!')
self.close() # hangs
def execute_function_threaded(self, func):
"""Run given function in thread"""
self.t = Thread(target=func)
self.t.start()
print('thread started')
app = QtWidgets.QApplication(sys.argv)
my_win = MyWindow()
my_win.show()
my_win.execute_function_threaded(func=lambda: my_win.auto_close(n=3))
sys.exit(app.exec_())
请注意,Qt 绑定导入就是这样完成的,以使此代码在您的端更容易运行;)