iMessage is stuck on a blank screen

hard reset. press and hold the power button and the home button for 30 secs then once you see the apple lety them go

thank you so much because every time i open up my iMessage it is blank and i always wondered why, so I'm glad you gave me my answer that have be waiting to here.I did exactly what you said do and it worked thank you so much now i can sign in to iMessage.