iOS: UIImagePickerController - using toolbar property?

Question

Given the following code, The buttons does not show up on the toolbar. Is there something wrong?

UIImagePickerController* cameraPickerController = [[UIImagePickerController alloc] init];
cameraPickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
cameraPickerController.delegate =self;
cameraPickerController.showsCameraControls = NO;
cameraPickerController.toolbarHidden = NO;

UIBarButtonItem *cancelBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target: self action: @selector(cancel)];
UIBarButtonItem *flexibleBarSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
flexibleBarSpace.width = 1000;
UIBarButtonItem *cameraBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:cameraPickerController action:@selector(takePicture)];
UIBarButtonItem *faceBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"Show facemask" style:UIBarButtonItemStyleBordered target: self action: @selector(showFacemask)];
cameraPickerController.toolbar.items = [NSArray arrayWithObjects:cancelBarButtonItem,flexibleBarSpace,cameraBarButtonItem,flexibleBarSpace,faceBarButtonItem,nil];

[self presentModalViewController:cameraPickerController animated:YES];

Those cancelBarButtons and other should in theory show up on the toolbar. However, it does not in this case. Please advise.

Answer 1

You can not add items to the toolbar because it has not been presented yet by the UIImagePickerController (I think.) Instead try this:

UIImagePickerController* cameraPickerController = [[UIImagePickerController alloc] init];
cameraPickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
cameraPickerController.delegate =self;
cameraPickerController.showsCameraControls = NO;

UIToolbar *theToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 436, 320, 44)];

UIBarButtonItem *cancelBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target: self action: @selector(cancel)];
UIBarButtonItem *flexibleBarSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
flexibleBarSpace.width = 1000;
UIBarButtonItem *cameraBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:cameraPickerController action:@selector(takePicture)];
UIBarButtonItem *faceBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"Show facemask" style:UIBarButtonItemStyleBordered target: self action: @selector(showFacemask)];

theToolbar.items = [NSArray arrayWithObjects:cancelBarButtonItem, flexibleBarSpace, cameraBarButtonItem, faceBarButtonItem, nil];

[cameraPickerController setCameraOverlayView:theToolbar];

[self presentModalViewController:cameraPickerController animated:YES];

Basically I just created a new toolbar and set it up as the cameraOverlayView.

Cheers!