当爬虫遇到PyQt5：GUI界面实现百度图片爬取

Posted 2021-09-15 小泽yyds

目录

1 成品图

2 核心代码展示

3 如何获取完整代码

---

1 成品图

2 核心代码展示

爬取操作

url = 'https://image.baidu.com/search/flip?tn=baiduimage&ie=utf-8&word=' + reptileWord + '&pn='

num = 1

headers = {
        'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (Khtml, like Gecko) Chrome/80.0.3987.122 Safari/537.36'
    }

response = requests.Session()
response.headers = headers

html = response.get(url, timeout=10, allow_redirects=False)
pic_urls = re.findall('"objURL":"(.*?)",', html.text, re.S)

for pic_url in pic_urls:
    download_value = '正在下载第' + str(num) + '张图片，图片url：' + str(pic_url)
    string = savePath + r'\\\\' + reptileWord + '+' + str(num) + '.jpg'
    local_path = open(string, 'wb')
    photo = requests.get(pic_url, timeout=7)
    
    local_path.write(photo.content)
    local_path.close()
    num += 1

实现选择文件夹并返回文本框路径操作

def select_folder(self):
    self.directory = QtWidgets.QFileDialog.getExistingDirectory(None, "选取文件夹", "C:/")  # 起始路径
    directory = str(self.directory)
    self.le1.setText(directory)

若无任何填入点击“start”按钮出现弹窗

if self.le0.text()=='' or self.le1.text()=='':
    QMessageBox.information(self, "提示", "请输入有效字符！")

实现进度条

    def timerEvent(self, e):
        if self.step >= 100:
            self.step = 0
            self.pbar.setValue(self.step)
            self.timer.stop()
            return
        self.step = self.step+1
        self.pbar.setValue(self.step)

    def doAction(self, value):
        if self.timer.isActive():
            self.timer.stop()
        else:
            self.timer.start(100, self)

3 如何获取完整代码

请移步我的GitHub页面：https://github.com/zhao302014/PyQt5/tree/main/reptile