How iOS is in the center of the camera viewfinder view

Title, the center point of the iOS camera's viewfinder, does not coincide with the center point of the current app view. What do you do if you want to add a view to the center?

Viewfinder's frame is cgrect theoverlayframe = cgrectmake( 260 ); So the center point coordinates should be (160,255).

< Span class= "Crayon-o" > < Span class= "crayon-h" > don't ask me how I know, I read it from this article

http://www.xiaoyaoli.com/?p=964

How iOS is in the center of the camera viewfinder view