Detect if the application in background or foreground in swift

[UIApplication sharedApplication].applicationState will return current state of applications such as:

• UIApplicationStateActive
• UIApplicationStateInactive
• UIApplicationStateBackground

or if you want to access via notification see UIApplicationDidBecomeActiveNotification

Swift 3+

let state = UIApplication.shared.applicationStateif state == .background || state == .inactive {    // background} else if state == .active {    // foreground}switch UIApplication.shared.applicationState {    case .background, .inactive:        // background    case .active:        // foreground    default:        break}

Objective C

UIApplicationState state = [[UIApplication sharedApplication] applicationState];if (state == UIApplicationStateBackground || state == UIApplicationStateInactive) {    // background} else if (state == UIApplicationStateActive) {    // foreground}

Swift 3

  let state: UIApplicationState = UIApplication.shared.applicationState            if state == .background {                // background            }            else if state == .active {                // foreground            }

Swift 4

let state = UIApplication.shared.applicationState        if state == .background {            print("App in Background")        }else if state == .active {            print("App in Foreground or Active")        }