Q: I cant pair my Bluetooth shutter in ios 8. Fix the Bluetooth connectivity.

What is it that you are trying to pair? What is a Bluetooth shutter? The iPhone only supports a portion of the Bluetooth stack. See what is supported here. iOS: Supported Bluetooth profiles - Apple Support

Since I don't know what a Bluetooth shutter is, I cannot say what profile it uses.

Talk to the manufacturer of your "Bluetooth shutter". Did they tell you it was compatible with the iPhone?