PyQt4 - 来自外部网站的setWindowIcon [英] PyQt4 - setWindowIcon from external website

问题描述

我目前正在PyQt4中开发我的第一个应用程序，我现在想做的是从网站上的图像源设置应用程序的窗口图标。

Im currently developing my first application in PyQt4, and what i would like to do now is to set my application's window icon from an image source on a website.

我认为这样的事情会起作用，但事实并非如此：
self。

I thought something like this would work, but that is not the case: self.

# Sets the application icon
def set_app_icon(self, icon_url):
    self.setWindowIcon(QIcon(QUrl(icon_url)))

self.set_app_icon('http://web.page/icon.png')

我如何实现这一目标？提前谢谢。

How can i achieve this? Thank you in advance.

推荐答案

QIcon 无法从中获取数据网页。您需要自己下载并将其提供给 QIcon 。这样的事情：

QIcon cannot go and fetch data from web. You need to download it yourself and give it to QIcon. Something like this:

import sys
from PyQt4 import QtGui, QtCore, QtNetwork

class Main(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(Main, self).__init__(parent)

    def loadIconFromUrl(self, url):
        manager = QtNetwork.QNetworkAccessManager(self)
        manager.finished.connect(self._setIconFromReply)
        manager.get(QtNetwork.QNetworkRequest(QtCore.QUrl(url)))

    def _setIconFromReply(self, reply):
        p = QtGui.QPixmap()
        p.loadFromData(reply.readAll(), format="ico")
        self.setWindowIcon(QtGui.QIcon(p))

app = QtGui.QApplication(sys.argv)
main = Main()
main.loadIconFromUrl("http://en.wikipedia.org/favicon.ico")
main.show()
sys.exit(app.exec_())

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