Apple 7 turns on the camera to take a delayed picture.

This is because the mobile phone turns on time-lapse photography, so just turn it off. The method of turning off time-lapse photography for iPhone 7 mobile phone is as follows:

First click the "camera" icon on the phone desktop, as shown in the figure.

2. After entering the camera interface, click the symbol in the red box in the upper right corner of the page below to enter, as shown in the figure below.

3. After entering, click the symbol in the red box in the upper left corner of the page below to turn off time-lapse photography, as shown in the figure below.