Find path on image with A-Star algorithm

you can get more detail about a-star algothm form http://www.gamedev.net/page/resources/_/technical/artificial-intelligence/a-pathfinding-for-beginners-r2003

How to use

1.Tap on the screen at some place to create the start point

2.Tap on the Screen again at some place to create the end point

3.Press "search" button

use yourself map

you can use you map to replace the defaule map. it is better to use simple color map. you need make sure that the layout size of the image-map in view is the real size of image and make the simple drawing view has the same size as the image-map. please also make the simple drawing view cover the image map just right.

use yourself wall color to instead of the demo wall color

self.pathFinder=[[TXPathFinder alloc] initWithMap:self.imgMap.image wallColor:[UIColor redColor]];