If you want to delete all of those notifications that you do not bother to read it Notification Center with just a simple gesture, then you can try a free jailbreak app called the new Notification Killer. With this tool installed on your computer, you can click on any of the tab buttons at the top of the Notification Center to clear all notices unread.
Developer and indicates that the Notification Center in iOS 7 tab and signs iOS 8 is different; if you are running iOS 7, then you have tabs Today / All / Missed, whereas if you are running iOS 8, then you have tabs Today / Notifications. You can click on the contract and any of them to clear unread notifications.
Notification Killer app does not come with any options to configure, just install it and start using it. It’s as simple as that. The tool is compatible with all of iOS 7 and iOS 8, available for free in the Cydia BIGBOSS repo.