creating multiple objects of UIImagePickerController

Question

I want to give zoom effect to the iPhone camera image while capturing the photo. The zoom effect should be for particular part of the current image. This effect should be before capturing the image.

For the sample I create the two objects of UIImagePickerController, the code is below

.h

UIImagePickerController *imagePicker_obj1,imagePicker_obj2;

UIScrollView *scrollView_obj1,*scrollView_obj;

.m

imagePicker_obj1 = [[UIImagePickerController alloc]init];

imagePicker_obj2 = [[UIImagePickerController alloc]init];

imagePicker_obj1.delegate = self;

imagePicker_obj2.delegate = self;

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { imagePicker_obj1.sourceType = UIImagePickerControllerSourceTypeCamera; imagePicker_obj2.sourceType = UIImagePickerControllerSourceTypeCamera; } else exit(1);

scrollView_obj1 = [[UIScrollView alloc]initWithFrame:CGRectMake(50.0, 250.0, 200.0, 200.0)];

[window addSubview:scrollView_obj1];

scrollView_obj1.contentSize = CGSizeMake(imagePicker_obj1.view.frame.size.width, imagePicker_obj1.view.frame.size.height);

scrollView_obj1.maximumZoomScale = 4.0;
scrollView_obj1.minimumZoomScale = 0.75;
scrollView_obj1.clipsToBounds = YES;
scrollView_obj1.delegate = self;
[scrollView_obj1 addSubview:imagePicker_obj1.view];

scrollView_obj = [[UIScrollView alloc]initWithFrame:CGRectMake(50.0, 0.0, 200.0, 200.0)];

[window addSubview:scrollView_obj];
[scrollView_obj setBackgroundColor:[UIColor clearColor]];
scrollView_obj.contentSize = CGSizeMake(imagePicker_obj2.view.frame.size.width, imagePicker_obj2.view.frame.size.height);
scrollView_obj.maximumZoomScale = 4.0;
scrollView_obj.minimumZoomScale = 0.75;
scrollView_obj.clipsToBounds = YES;
scrollView_obj.delegate = self;
   [scrollView_obj addSubview:imagePicker_obj2.view];

after this I expect that the two different objects of UIImagePickerController gives me same output and the content of two scroll views will be same. But I got the output from only one object of UIImagePickerController and other is blank. can someone will explain me what's going wrong?

Answer 1

Since you only have one camera, I would expect only one UIImagePickerController to work in this case.

Answer 2

The second UIImagePickerController wasn't able to grab the camera because the first had an exclusive lock on it.