Python+PyQt6编写一个图片播放器

def showImage(self, imagePath):
    self.current_pixmap = QPixmap(imagePath)
    self.resizeImage()

def resizeImage(self):
    if self.current_pixmap:
        # 获取标签的大小
        label_size = self.lb.size()
        # 保持纵横比缩放图片以适应标签大小
        scaled_pixmap = self.current_pixmap.scaled(
            label_size.width(),
            label_size.height(),
            Qt.AspectRatioMode.KeepAspectRatio,
            Qt.TransformationMode.SmoothTransformation
        )
        self.lb.setPixmap(scaled_pixmap)

import sys
import os

from PyQt6.QtCore import Qt
from PyQt6.QtGui import QPixmap
from PyQt6.QtWidgets import QWidget, QVBoxLayout, QApplication, QLabel, QFileDialog, QPushButton, QHBoxLayout


class MyWidget(QWidget):
    def __init__(self, parent=None):
        super(MyWidget, self).__init__(parent)
        self.setWindowTitle("图片浏览器")
        self.resize(500, 350)

        # 修改 QLabel 的设置
        self.lb = QLabel()
        self.lb.setMinimumSize(200, 200)  # 设置最小尺寸
        self.lb.setAlignment(Qt.AlignmentFlag.AlignCenter)  # 居中对齐

        # 选择文件夹按钮
        self.selectFolderButton = QPushButton("选择文件夹")
        self.selectFolderButton.clicked.connect(self.selectFolder)

        # 上一张按钮
        self.prevButton = QPushButton("上一张")
        self.prevButton.clicked.connect(self.showPrevImage)

        # 下一张按钮
        self.nextButton = QPushButton("下一张")
        self.nextButton.clicked.connect(self.showNextImage)

        # 默认图片列表
        self.imageFiles = []
        self.currentIndex = -1
        self.current_pixmap = None  # 添加存储当前图片的变量

        # 布局设置
        layout = QVBoxLayout()

        # 图片标签占据主要空间
        layout.addWidget(self.lb, 1)  # 添加拉伸因子1

        # 按钮布局
        buttonLayout = QHBoxLayout()
        buttonLayout.addWidget(self.prevButton)
        buttonLayout.addWidget(self.selectFolderButton)
        buttonLayout.addWidget(self.nextButton)

        layout.addLayout(buttonLayout)
        self.setLayout(layout)

    def selectFolder(self):
        folderPath = QFileDialog.getExistingDirectory(self, "选择文件夹")
        if folderPath:
            self.imageFiles = [os.path.join(folderPath, f) for f in os.listdir(folderPath)
                               if f.lower().endswith(('.png', '.jpg', '.jpeg', '.bmp', '.gif'))]
            self.currentIndex = 0
            if self.imageFiles:
                self.showImage(self.imageFiles[self.currentIndex])

    def showImage(self, imagePath):
        self.current_pixmap = QPixmap(imagePath)
        self.resizeImage()

    def showPrevImage(self):
        if self.imageFiles and self.currentIndex > 0:
            self.currentIndex -= 1
            self.showImage(self.imageFiles[self.currentIndex])

    def showNextImage(self):
        if self.imageFiles and self.currentIndex < len(self.imageFiles) - 1:
            self.currentIndex += 1
            self.showImage(self.imageFiles[self.currentIndex])

    def resizeEvent(self, event):
        super().resizeEvent(event)
        self.resizeImage()

    def resizeImage(self):
        if self.current_pixmap:
            # 获取标签的大小
            label_size = self.lb.size()
            # 保持纵横比缩放图片以适应标签大小
            scaled_pixmap = self.current_pixmap.scaled(
                label_size.width(),
                label_size.height(),
                Qt.AspectRatioMode.KeepAspectRatio,
                Qt.TransformationMode.SmoothTransformation
            )
            self.lb.setPixmap(scaled_pixmap)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = MyWidget()
    w.show()
    sys.exit(app.exec())