1. First, open Settings on your Apple phone.
2. Select "Privacy".
3. Click on "Exercise and Health".
4. Finally, just open the slide button behind WeChat.
Precautions:
"Sports and Health" allows applications to access sensor data, including physical activity, number of steps, number of floors climbed, and so on. If it is turned off, the program using sensor data on the mobile phone software will be invalid.