使用 PyQt5 QLabel.setPixmap 后出现分段错误

问题描述

我正在尝试使用 QPixmap 和 QLabel 显示 PIL 图像.但是当我运行代码时，我得到了 SIGSEGV.代码:

I'm trying to show a PIL image using QPixmap and QLabel. But when I run the code, I get SIGSEGV.Code:

import sys

from PIL import Image
from PIL.ImageQt import ImageQt
from PyQt5 import QtWidgets
from PyQt5.QtGui import QPixmap
from PyQt5.QtWidgets import QApplication, QMainWindow


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        # im = Image.new('RGB', (200, 200), (255, 255, 255))
        im = Image.new('RGB', (500, 500), (255, 255, 255))
        self.label.setPixmap(QPixmap.fromImage(ImageQt(im)))

    def setupUi(self, MainWindow):
        MainWindow.resize(767, 557)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.layout = QtWidgets.QGridLayout(self.centralwidget)
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.layout.addWidget(self.label, 0, 0, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MainWindow()
    ex.show()
    sys.exit(app.exec_())

当我将图像大小更改为 200x200 时，它不会引发分割错误，而是随机着色像素.

When I change image size to 200x200, it doesn't throw segmentation fault but has randomly colorized pixels.

如何将我的 PIL 图像正确放入窗口?

How do I put my PIL image into a window correctly?

推荐答案

试试RGBA格式:

import sys

from PIL import Image
from PIL.ImageQt import ImageQt
from PyQt5 import QtWidgets
from PyQt5.QtGui import QPixmap
from PyQt5.QtWidgets import QApplication, QMainWindow


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setupUi(self)

#        im = Image.new('RGB', (200, 200), (255, 255, 155))
#        im = Image.new('RGB', (500, 500), (255, 255, 255))

        im = Image.new("RGBA", (500, 500), (255, 155, 155, 255))           # <---

        self.label.setPixmap(QPixmap.fromImage(ImageQt(im)))

    def setupUi(self, MainWindow):
        MainWindow.resize(767, 557)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.layout = QtWidgets.QGridLayout(self.centralwidget)
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.layout.addWidget(self.label, 0, 0, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MainWindow()
    ex.show()
    sys.exit(app.exec_())

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