我正在尝试在pyqt5中创建一个刷新按钮.我正在构建一个桌面应用程序.我编写了扫描特定文件夹并将文件名及其路径保存为数组的代码.

数组值作为项目添加到QListWidget

self.sampleChoose_list.addItems(sample_directory[0])

我正在尝试制作一个刷新数组值并将其传递给QListWidget的函数.

像这样

self.refreshSamples.clicked.connect(self.refreshSample)

def refreshSample(self): 
    sample_directory = []
    sample_files = []
    for (dirpath, dirnames, filenames) in walk('./Samples'):
        filenames = [f for f in filenames if not f[0] == '.']
        sample_files.extend(filenames)
        break
    the_dir = "Samples"
    paths = [os.path.abspath(os.path.join(the_dir,filename)) for filename in os.listdir(the_dir) if not filename.startswith('.')]    

    sample_directory.append(sample_files)
    sample_directory.append(paths)

    self.sampleChoose_list.addItems(sample_directory[0])

我遇到的问题是：当我按下“刷新”按钮时,会添加新项,但不会删除旧项.如何从QListWidget删除项目？

解决方法:

使用QListWidget.clear()和它

Removes all items and selections in the view.

要获得更好的选择,您可以使用QListWidget.takeItem(index),它

Removes and returns the item from the given row in the list widget

Official Docs: clear()
Official Docs: takeItem()