App wont begin to download.. Stuck on spinning circle ios7

When i go to download an app on my ipad air ios 7 it just gets stuck on the loading spinning circle thing (in the app store app) no app icon appears on my homescreen at all... Ive downloaded loads of apps on this device in the past with the same firmware just fine.... Also it does the same thing when i try to update apps.... Please tell me how to fix this