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MTImageView is a simple UIImageView written entirely in CoreGraphics and GCD to handle touches on complex polygon maps.
It is able to display very complex polygon maps such as US states, and accurately tell which one is touched. You do not need whole array of buttons to take input on complicated polygon maps. Just a single drop-in of MTImageMapView at IB or your code and that is it.
All mappings and memory allocations are handled by the component at runtime. This control is tested from 4.3 to 6.0 on devices, supports MRC/ARC, and is packed in two files only.