Open Camera in another View in iOS - ios

Question

How can I call this method from my MainController.m class and pass the Image to my MainController
CameraController.m
- (void) openCamera {
UIImagePickerController *picker = [[UIImagePickerController alloc]init];
picker.delegate = self;
picker.sourcetype = UIImagePickerContrllerSourceTypeCamera;
[self presentViewContrller:picker animated:YES completion:nil];
}
I'm still a newbie in iOS development and is it possible to use a delegate?
Edit:CameraController doesn't have a nib.

Answer 1

In CameraController.h add these lines:
#protocol CameraControllerDelegate <NSObject>
- (void)didFinishCapturingImage:(UIImage*)image;
#end
and add a property in CameraController class (in CameraController.h)
#property (nonatomic, strong) id<CameraControllerDelegate> delegate;
In MainController.h, add protocol in interface implementation; like this:
#interface MainController : NSObject <CameraControllerDelegate>
before you present/push CameraController from your MainController.m add this line:
cameraController.delegate = self;
In MainController.m implement didFinishCapturingImage method.
- (void)didFinishCapturingImage:(UIImage*)image {
//your logic
}
in Image Picker Controller Delegate, add this line:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
[picker dismissViewControllerAnimated:YES completion: Nil];
UIImage *image = [info objectForKey:#"UIImagePickerControllerOriginalImage"];
//this will send delegate callback to MainController
[self.delegate didFinishCapturingImage:image];
}
EDIT: Second Solution:
Make a property in CameraController.h to keep instance of MainController object:
#property (nonatomic, strong) MainController *mainController;
Assign self to CameraController's instance's property mainController where you use CameraController:
cameraController.mainController = self;
Edit you openCamera method:
- (void) openCamera {
UIImagePickerController *picker = [[UIImagePickerController alloc]init];
picker.delegate = self.mainController; //important line
picker.sourcetype = UIImagePickerContrllerSourceTypeCamera;
[self.mainController presentViewContrller:picker animated:YES completion:nil];
}
and implement following method in MainController.m
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
//your logic
}
Don't forget to include UIImagePickerControllerDelegate in MainController.h.
No need to create protocols and implement protocol methods..