为什么 PyQt5 QPixmap 会导致 python 崩溃?
问题描述
当我尝试将此字符串列表转换为像素图时，python 会崩溃.有什么建议可以解决这个问题?
When I try and convert this list of strings to a pixmap it crashes python. Any suggestions to pix this?
openIcon = [
'16 13 5 1',
'. c #040404',
'# c #808304',
'a c None',
'b c #f3f704',
'c c #f3f7f3',
'aaaaaaaaa...aaaa',
'aaaaaaaa.aaa.a.a',
'aaaaaaaaaaaaa..a',
'a...aaaaaaaa...a',
'.bcb.......aaaaa',
'.cbcbcbcbc.aaaaa',
'.bcbcbcbcb.aaaaa',
'.cbcb...........',
'.bcb.#########.a',
'.cb.#########.aa',
'.b.#########.aaa',
'..#########.aaaa',
'...........aaaaa'
]
if __name__ == "__main__":
from PyQt5.QtGui import QPixmap
openIcon_p = QPixmap(openIcon)
openIcon_p.save("openIcon.png")
使用:
Win32 上的 Python 3.7.4(tags/v3.7.4:e09359112e，2019 年 7 月 8 日，20:34:20)[MSC v.1916 64 位 (AMD64)]
Python 3.7.4 (tags/v3.7.4:e09359112e, Jul 8 2019, 20:34:20) [MSC v.1916 64 bit (AMD64)] on win32
PyQt5==5.13.0
PyQt5==5.13.0
解决方案
从控制台运行代码以查看错误消息.你需要一个 QApplication 在 QPixmap 之前:
run the code from console to see the error messages.
You need a QApplication before QPixmap:
from PyQt5 import QtWidgets, QtGui
import sys
openIcon = [
'16 13 5 1',
'. c #040404',
'# c #808304',
'a c None',
'b c #f3f704',
'c c #f3f7f3',
'aaaaaaaaa...aaaa',
'aaaaaaaa.aaa.a.a',
'aaaaaaaaaaaaa..a',
'a...aaaaaaaa...a',
'.bcb.......aaaaa',
'.cbcbcbcbc.aaaaa',
'.bcbcbcbcb.aaaaa',
'.cbcb...........',
'.bcb.#########.a',
'.cb.#########.aa',
'.b.#########.aaa',
'..#########.aaaa',
'...........aaaaa'
]
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
openIcon_p = QtGui.QPixmap(openIcon)
openIcon_p.save("openIcon.png")
如果没有添加的行，代码会给出以下错误消息:
without the added line the code gives the following error message:
QPixmap::fromImageInPlace: QPixmap cannot be created without a QGuiApplication
QPixmap: Must construct a QGuiApplication before a QPixmap
有关说明，请参阅 Qt-Documentation.还有一个描述何时使用 QtWidgets.QApplication 以及何时使用 eyllanesc 评论的 QtGui.QGuiApplication
for explanation see Qt-Documentation. there is also a description when to use QtWidgets.QApplication and when QtGui.QGuiApplication as commented by eyllanesc
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