ios - Device token is not received from iphone -

pfinstallation *currentinstallation = [pfinstallation currentinstallation]; [currentinstallation setdevicetokenfromdata:newdevicetoken]; [currentinstallation saveinbackground]; 

i installed app in iphone, manually turned off notifications of app (in setting screen) , uninstalled app device... again installed app in device, notification automatically turned on device token not received.