PyQt 窗口打开后立即关闭

问题描述

我在尝试打开 PyQt 窗口时遇到问题.

I am getting an issue when trying to open a PyQt window.

下面的代码是我的原始代码的一个例子.当我在 import Test 中导入模块并运行 test.Start() 时，出现以下错误:

The code below is an example of my original code. When I imported the module in import Test and ran test.Start(), I got the following error:

QCoreApplication::exec:事件循环已经在运行

经过一番研究，我发现是因为我已经做了一个QApplication.

After some research, I found out it was because I had already already made a QApplication.

test.py....
import sys

def Start():
    app = QApplication(sys.argv)
    m = myWindow()
    m.show()
    app.exec_()

class myWindow():....

if __name__ == "__main__":
    Start()

然后我读到我可以像这样重写我的代码，它会修复错误:

So then I read that I could rewrite my code like this and it would fix the error:

test.py....

def Start():
    m = myWindow()
    m.show()


class myWindow():....

if __name__ == "__main__":
    import sys
    app = QApplication(sys.argv)
    Start()
    app.exec_()

现在我不再收到 QCoreApplication::exec: The event loop already running 错误，但我的窗口在打开后几乎立即关闭.

Now I no longer get the QCoreApplication::exec: The event loop is already running error, but my window closes almost immediately after opening.

推荐答案

你需要保留对打开的窗口的引用，否则它会超出范围并被垃圾收集，这也会破坏底层的 C++ 对象.试试:

You need to keep a reference to the opened window, otherwise it goes out of scope and is garbage collected, which will destroy the underlying C++ object also. Try:

def Start():
    m = myWindow()
    m.show()
    return m


class myWindow():....

if __name__ == "__main__":
    import sys
    app = QApplication(sys.argv)
    window = Start()
    app.exec_()

这篇关于PyQt 窗口打开后立即关闭的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！