OpenCV Java VS Objective C

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Hi, I am new into objective C. I have written an application in Java, and I need it to be "translated" to Objective-C, so my App can be developed to iOS. I have managed to do a good work so far, but I need to know some equivalent Classes of Java into Obj-C.

For example:

What is the equivalent in Objective-C for Java's MatOfPoint ? I need this kind of information for: MatOfPoint, Core, Imgproc, PortraitCameraBridgeViewBase.CvCameraViewListener2, PortraitCameraBridgeViewBase.CvCameraViewFrame .

Please, can anyone help?