1 1 What is the black screen?

Taking iPhone 1 1 and IOS 13 systems as examples, the reasons why Apple's mobile phones take pictures are black:

1, permission problem: Apple's mobile phone camera is a common problem. Most of the reasons are improper permission setting, which leads to confusion of permissions. Users can solve problems in the settings. First, open the Apple phone, open the settings on the phone desktop, and then select Privacy in the settings. Choose a camera in privacy settings, and open the camera permissions of commonly used software such as Weibo, WeChat and QQ to solve the confusion of camera permissions.

2. The camera is broken: it may be stuck. At this time, you can try to restart the Apple phone. If it still doesn't work, you can go to the maintenance point for repair, because the black screen of the camera is usually caused by the damage of the front camera. Just replace the cable of the front camera.

How to forcibly restart Apple's mobile phone;

Just press and hold the power off button and the home button 10 second. If it is an Apple 6 and 6s series or below, press and hold the power off button and the volume down button 10 second if it is an Apple 7 series. If it is Apple 8, X, 1 1 series, you can press the Volume+key first, then the Volume-key, and then immediately press and hold the power button on the right side until the Apple icon appears.

This answer applies to most of Apple's mobile phone models.