How does Apple 7 delete photos in batches?

First of all, for the photos in the mobile phone

1, first open the photo album, you can see all the photo albums, find the photo album where you want to delete, and open it.

2. Click the "Edit" button in the upper right corner of the phone.

3. At this point, the delete option will appear. Select the photos you want to delete, and then click Delete Selected Photos below.

Second, for photos synced by iTunes,

1. Connect your computer to the iphone, open iTunes, and navigate to the folder where the synchronized photos are located through Explorer (double-click the "My Computer" icon under Windows).

2. Delete or move the photos in the folder corresponding to the photos to be deleted in the mobile phone to other places. If you need to delete them all at once, just click "Cancel Picture Synchronization".