There is a way to post text without a photo on WeChat.  Follow these steps. Wechat post without a photo

  1. Go to the “Social” tab.
  2. Click on “Moments” on the top part of screen.
  3. Press or hold the camera button for a while (a new window appears to write text).
  4. You can then write text and click the “Send” button.

That’s all to it.