ipad - Draw a line when user touch the Uiimageview -

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i working on project in have added uiimageview show image selected user. requirement if user want crop images can touch image according crop requirement. when user cropping image line should draw @ place user has touched. know uitouch class use it. unable it.

a couple of possible solutions.

1) create custom uiview contains uiimageview it's subview. make uiimageview same size custom uiview. add code detect touches on custom uiview , draw lines on top of uiimageview subview.

2) create custom clone of uiimageview draws image first 'background' , detects touches , draws lines on top of image.

also make sure have userinteractioneabled set yes on view receiving touches.


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