【PyQT5】自定义控件 显示网络图片

原理：使用 requests 获取图片，加载图片内容到控件中即可。

import sys  
import requests  
from PyQt5.QtWidgets import QApplication  
from PyQt5.QtWidgets import (QWidget,  QLabel, QVBoxLayout)  
from PyQt5.QtGui import  QPixmap

class Picture(QWidget):

    def __init__(self, parent=None, url=None):
        super().__init__(parent)
        self.url = url
        self.ui()

    def ui(self):
        # Get Pictures
        req = requests.get(self.url)
        photo = QPixmap()
        photo.loadFromData(req.content)

        label= QLabel()
        label.setPixmap(photo)

        layout =QVBoxLayout()
        layout.addWidget(label)
        self.setLayout(layout)


if __name__ == '__main__':  
    app = QApplication(sys.argv)
    url='https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=415293130,2419074865&fm=27&gp=0.jpg'

    pic = Picture(url=url)
    pic.show()
    sys.exit(app.exec_())

req = requests.get(self.url) 这一步会造成UI阻塞，建议使用twisted之类的库异步获取图片。