Custom thermometer control for iOS

I need custom thermometer with an option to start slide from outside of the control All there will be minimum value and maximum value that can be change (as shown in the image) return value will be between minimum and maximum values there need to be an option to gray out the control for disabled and an option to put custom color (need to be hot water (red color) and cold water (blue color)) also need to be custom indicator (image that we can change) and when sliding we need to see at the right the value in string format