draw line between two points in iphone?

Question

The above picture indicate the redpoint, i like to join those points.

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Answer 1

Create your UIImageView subclass, add some methods which will allow to add point's on user touch (will draw them in drawRect: and also place into C-array) and one method to "commit" line. Commit line will simply go through C-array and draw them in context with CG methods.