Use this if you need to replicate iOS's Reminder App like geofence UI. This is easy to use component, I have used gestures, MKCircle and a little bit of CoreGraphics to achieve the desired layout design.
Before starting to develop this component I looked over the internet, StackOverflow and other sites when I could not find any suitable code that I could use, I was bound to create my own resizable geofence component.
This is our final output.
Note, this was developed on specific requirements for one of my projects.