Imen-ks / MazeA

Sample iOS application implementing the A* (A-star) search algorithm for maze solving and using FileManager + UserDefaults for maze storage

Maze A*

Xcode project relating to an iOS application for maze solving using A* pathfinding.

A* (pronounced 'A-star') is a path search algorithm used to find the shortest path from a starting point to a goal. With n being the next node on the path, A* selects the path that minimizes : $$f(n) = g(n) + h(n)$$

• $g(n)$ is the cost of the path from the start point to n
• $h(n)$ is a heuristic function that estimates the cost of the cheapest path from n to the goal

Note that the Manhattan distance is the heuristic function chosen for this project. In addition, the authorized movements on the maze are only vertical and horizontal ones.

Usage

Open the MazeA*.xcodeproj file with Xcode and build the application in the simulator or on a device.

Available features

• Add : create your own maze by defining the number of rows / columns & the position of start / goal
• Customize : add or remove walls from the maze
• Save : store your maze
• Load : retrieve your stored mazes
• Solve : watch A* in action solving your maze