使用场景：点击扫码组件弹出微信订阅的弹窗，点击弹窗上的确认后（如下图），触发照片上传。代码实现如下，但是最终没有上传图片

image_name = "detail_page.png"  # 运行这个case时需要在本目录下有名为test.png的图片
with open(image_name, "rb") as fd:
    c = fd.read()
    image_b64data = base64.b64encode(c).decode("utf8")
self.app.mock_choose_image(image_name, image_b64data)
# qr = "th-view >>> bottomnavigator >>> th-view >>> th-view >>> th-image >>> image"
qr = "th-view >>> bottomnavigator >>> th-view >>> th-view >>> th-view >>> view"
elements = self.page.get_elements(qr)
print("elements size is " + str(len(elements)))
# 这个element class属性中有scan的标志
elements[11].click()
self.native.allow_send_subscribe_message(True)