UIImagePickerController does not show edit screen - iphone

Question

I'm playing around with a cameraOverLayView and encountered a weird behavior. Before presenting the UIImagePickerController, I set allowsEditing to YES. After the capture screen comes up, I tap on a button that triggers takePicture(). Instead of presenting the editing screen, the delegate method didFinishPickingMediaWithInfo() gets called right away. Can anyone help me figure out what I could be doing wrong? I pasted some of my code below...
Thanks!
- (BOOL)shouldStartCameraController {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO) {
return NO;
}
CGSize screenSize = [[UIScreen mainScreen] bounds].size;
float overlayOffset = 0;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
if (screenSize.height > 480.0f) {
overlayOffset = 195;
} else {
overlayOffset = 103;
}
} else {
/*Do iPad stuff here.*/
}
UIImagePickerController *cameraUI = [[UIImagePickerController alloc] init];
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]
&& [[UIImagePickerController availableMediaTypesForSourceType:
UIImagePickerControllerSourceTypeCamera] containsObject:(NSString *)kUTTypeImage]) {
cameraUI.mediaTypes = [NSArray arrayWithObject:(NSString *) kUTTypeImage];
cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;
if ([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear]) {
cameraUI.cameraDevice = UIImagePickerControllerCameraDeviceRear;
} else if ([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront]) {
cameraUI.cameraDevice = UIImagePickerControllerCameraDeviceFront;
}
} else {
return NO;
}
UIView *cameraOverlayView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, cameraUI.view.frame.size.width, cameraUI.view.frame.size.height)];
UIImageView *cameraOverlayImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"iphone5_camera_overlay.png"]];
cameraOverlayImageView.frame = CGRectMake(0, 0, cameraUI.view.frame.size.width, cameraUI.view.frame.size.height);
[cameraOverlayView addSubview:cameraOverlayImageView];
UILabel *cameraLabel = [[UILabel alloc] initWithFrame:CGRectMake( 0.0f, self.view.bounds.size.height-overlayOffset, self.view.bounds.size.width, 50.0f)];
[cameraLabel setTextAlignment:NSTextAlignmentCenter];
[cameraLabel setBackgroundColor:[UIColor clearColor]];
[cameraLabel setTextColor:[UIColor whiteColor]];
[cameraLabel setShadowColor:[UIColor colorWithWhite:0.0f alpha:0.300f]];
[cameraLabel setShadowOffset:CGSizeMake( 0.0f, -1.0f)];
[cameraLabel setFont:[UIFont boldSystemFontOfSize:18.0f]];
[cameraOverlayView addSubview:cameraLabel];
UIButton *cancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
[cancelButton addTarget:self action:#selector(cancelButtonPressed:) forControlEvents:UIControlEventTouchDown];
[cancelButton setFrame:CGRectMake(10, cameraOverlayView.frame.size.height-60, 50, 50)];
[cancelButton setBackgroundColor:[[UIColor whiteColor] colorWithAlphaComponent:0.5f]];
[cameraOverlayView addSubview:cancelButton];
UIButton *snapButton = [UIButton buttonWithType:UIButtonTypeCustom];
[snapButton addTarget:self action:#selector(takePictureButtonPressed:) forControlEvents:UIControlEventTouchDown];
[snapButton setFrame:CGRectMake(110, cameraOverlayView.frame.size.height-60, 100, 50)];
[snapButton setBackgroundColor:[[UIColor whiteColor] colorWithAlphaComponent:0.5f]];
[cameraOverlayView addSubview:snapButton];
cameraUI.allowsEditing = YES;
cameraUI.showsCameraControls = NO;
cameraUI.delegate = self;
self.imagePickerController = cameraUI;
[self presentModalViewController:cameraUI animated:YES];
return YES;
}
- (void)handleGesture:(UIGestureRecognizer *)gestureRecognizer {
[self shouldPresentPhotoCaptureController];
}
#pragma mark - UIBarButton Selectors
- (void)takePictureButtonPressed:(id)sender {
NSLog(#"takePictureButtonPressed...");
// TODO: take picture!
[self.imagePickerController takePicture];
}

Answer 1

Possible dublicate: How do I use [camera takePhoto] and edit using UIImagePicker - UIImagePickerController.allowsEditing = YES
According to takePicture: method in Apple documentation:
Use this method in conjunction with a custom overlay view to initiate the programmatic capture of a still image. This supports taking more than one picture without leaving the interface, but requires that you hide the default image picker controls.
Calling this method while an image is being captured has no effect. You must wait until the associated delegate object receives an imagePickerController:didFinishPickingMediaWithInfo: message before you can capture another picture.
It seems that this approach (custom overlay) it is configured in order to be managed by yourself. Even if "allowsEditing = YES" the taken picture will be directly sent to imagePickerController:didFinishPickingMediaWithInfo:.
Based on that if we want to edit the taken picture using our custom user interface we should create an according custom edit screen for that purpose.