always returns nil in iPhone

Question

I am trying to apply Mike Chen's answer here , using SDK 3.0. In delegate.m file I implement;

[viewController.view addSubview:[[objc_getClass("PLCameraController") sharedInstance] previewView]];

and in viewcontroller.m I implement:

PLCameraController *cam = [objc_getClass("PLCameraController") sharedInstance];
CapturedImage = [cam _createPreviewImage];

but 'cam' is always nil. Any suggestions?

Answer 1

This won't work when running in the simulator or on an iPod Touch. Are you running this on a physical iPhone with a camera?

Also, if you've dumped the headers correctly, you shouldn't be using the objc_ runtime functions, but rather using the class names. Is the result of objc_getClass("PLCameraController") set to nil ?

On a side note: I hope you're not looking to publish your application through the App Store because this sort of private method calling is a great excuse for Apple to reject your application.

Answer 2

To use PLCameraController, you'll need to include the PhotoLibray private framework. The simplest way to do that is drag drop an Image Picker Controller (UIImagePickerController) into your main nib.