所以我有一个UI,它加载了很多按钮,都有图像,问题是,它需要很长的时间,所以我试着把它放到一个QThread
中,我让它工作,但没有速度差异,所以我尝试了不同的解决方案,但现在线程无法启动
代码:
import sys
import os
from PyQt5 import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui, QtPrintSupport, QtWidgets, uic
# I've tried using a QThread for this, but it still took the same amount of time.
class LoadImageThumbnailshread(QThread):
def __init__(self, listButtons, listPaths):
QThread.__init__(self)
self.listButtons = listButtons
self.listPaths = listPaths
def run(self):
self.process_images_Thread()
def process_images_Thread(self):
for i, j in enumerate(self.listButtons):
j.setIcon(QIcon(self.listPaths[i]))
j.setIconSize(QSize(150-6, 60-6))
class App(QDialog):
def __init__(self):
super().__init__()
self.title = 'PyQt5 layout - pythonspot.com'
self.left = 10
self.top = 10
self.width = 320
self.height = 100
self.images_path = []
self.button_images = []
self.initUI()
def initUI(self):
self.setWindowTitle(self.title)
self.setGeometry(self.left, self.top, self.width, self.height)
self.createGridLayout()
windowLayout = QVBoxLayout()
windowLayout.addWidget(self.horizontalGroupBox)
self.setLayout(windowLayout)
self.show()
def createGridLayout(self):
self.horizontalGroupBox = QGroupBox("Grid")
layout = QGridLayout()
layout.setColumnStretch(1, 4)
layout.setColumnStretch(2, 4)
for i in range(100):
self.btnImage = QPushButton()
self.btnImage.setObjectName('btnImage')
self.images_path.append(os.path.dirname(
os.path.abspath(__file__)) + 'view.png')
# ! I have also tried using Pixmaps with Clickable labels, but it made no diffrence.
# pixmap = QPixmap(os.path.dirname(os.path.abspath(__file__)) + image_locations[i])
# pixmap = pixmap.scaled(60, 300, Qt.KeepAspectRatio, Qt.FastTransformation)
# self.btnImage.setPixmap(pixmap)
# ! Enableing this loads the images, but very slowly
# self.btnImage.setIcon(QIcon(os.path.dirname(os.path.abspath(__file__)) + '/view.png'))
# self.btnImage.setIconSize(QSize(150-6, 60-6))
self.button_images.append(self.btnImage)
layout.addWidget(self.btnImage, i, 0)
# ! This starts the QThread
converter = LoadImageThumbnailshread(
self.button_images, self.images_path)
converter.start()
self.horizontalGroupBox.setLayout(layout)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = App()
sys.exit(app.exec_())
为了解释更多我想要的内容,我想在UI加载后启动一个QThread
,该QThread
将所有图像加载到每个按钮上。问题是:它现在不起作用
我遇到的另一个问题是,当我得到QThread
时,UI等待它完成,然后突然出现了所有东西。我希望QThread
是完全独立的,如果你愿意的话,可以看到一个接一个地加载所有图像
线程不会加速任何任务但执行不阻止任何线程的任务。鉴于上述情况,如果我有n个“任务”,并且每个任务都在“n”个线程中执行,那么总执行时间将是1个任务,也就是说,没有任务被加速,但任务被重新分配。总之:如果您想加速任务,那么线程不是默认选项,因为它取决于应用程序
另一方面,映像的加载不消耗时间,但有许多任务消耗的时间很少,总的来说相当于消耗大量时间的任务,不幸的是,该任务无法在另一个线程或进程中执行,因为GUI的元素不是线程安全的
一种解决方法是,负载是每T秒由一小群n个元素组成的,因此总任务将被分配,用户将不会观察到任何滞后效应
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