The default camera picker behavior available with the methods below is as follows: after the user presses the shutter button they are presented with a preview, and two buttons, Retake and Use.
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
I want instead to mimic the behavior of the iOS default camera tool, that is as soon as an image is taken I'd like it saved and then the shutter becomes available again immediately.
Is this simple to do or do I need to write a custom toolbar using the cameraOverlayView property and a custom method that fires the shutter?
picker.cameraOverlayView = [[UIView alloc] init];
[picker.cameraOverlayView addSubview:bottomToolBar];
Seems that what I needed to do was create an instance of UIView as below and it works.
picker.cameraOverlayView = [[UIView alloc] initWithFrame:CGRectMake(
0, 0, 640, 960)];
for my experiment I just created a UIButton that targets a method called takePicture. takePicture calls [picker takePicture];which in turn calls imagePickerController:didFinishPickingImage:editingInfo: via delegation, which calls UIImageWriteToSavedPhotosAlbum(image,nil,nil,nil);. The picker is not dismissed so I can continue taking pictures.
Related
I am having a great deal of trouble displaying at small, live camera image in a viewController.
I would have expected the following code to show camera display to appear in a 100x 100 window, but it keeps appearing full screen!
Help appreciated.
camera = [[UIImagePickerController alloc] init];
UIView *cameraHUD = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
cameraHUD.userInteractionEnabled = YES;
[camera setSourceType:UIImagePickerControllerSourceTypeCamera];
camera.showsCameraControls = NO;
camera.navigationBarHidden = YES;
camera.toolbarHidden = YES;
camera.cameraOverlayView = cameraHUD;
[self presentModalViewController:camera animated:YES];
[self.view bringSubviewToFront:cameraHUD];
You are present a new view instead of your actual view, so by default a new UIView has contentmode= scale to fill.
You have to add for example something like:
[camera setContentMode:UIViewContentModeTopLeft];
But if you want do something cool you have to add your Camera View as subview.
I hope it can help you
bye ;)
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
How do you create a custom camera view, instead of UIImagePickerViewController?
Many image sharing apps available today from the App Store use a custom camera instead of the standard camera picker provided by Apple.
Does anyone know any tutorials or tips for creating a custom camera?
Yes, create a UIImagePickerController from code, adjust its properties, add an overlay onto it, and with you controller, control whatever you want on that overlay : custom controls, overlaying images, etc...
That gives something like this :
self.picker = [[UIImagePickerController alloc] init];
self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
self.picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
self.picker.cameraDevice = UIImagePickerControllerCameraDeviceRear;
self.picker.showsCameraControls = NO;
self.picker.navigationBarHidden = YES;
self.picker.toolbarHidden = YES;
self.picker.wantsFullScreenLayout = YES;
// Insert the overlay
self.overlay = [[OverlayViewController alloc] initWithNibName:#"Overlay" bundle:nil];
self.overlay.pickerReference = self.picker;
self.picker.cameraOverlayView = self.overlay.view;
self.picker.delegate = self.overlay;
[self presentModalViewController:self.picker animated:NO];
OverlayViewController is the controller that you must write to control everything you add onto the overlay.
pickerReference is a property you can keep to send orders to the camera. For example, you could call the following from an IBAction coming from a UIButton placed onto the overlay :
[self.pickerReference takePicture];
For image processing (regarding our discuss in the comments), you could take a look at this :
http://code.google.com/p/simple-iphone-image-processing/
http://sourceforge.net/projects/photoshopframew/
https://github.com/esilverberg/ios-image-filters
http://developer.apple.com/library/ios/#samplecode/QuartzDemo/Introduction/Intro.html
http://cocoawithlove.com/2011/01/advanced-drawing-using-appkit.html
I am programmatically building a UINavigationContoller for iOS and am having problems making it fully accessible. In loadView I create the main UIView and set it as NOT accessible:
- (void)loadView
{
CGRect viewRect = [[UIScreen mainScreen] applicationFrame];
UIView *tmp = [[UIView alloc] initWithFrame:viewRect];
[tmp setIsAccessibilityElement:NO];
I then add additional UIViews that contain just background images and also set those as not accessible. All views and controls are added onto the "tmp" UIView created above. Here is a "background" view example:
UIImage* microphone = [UIImage imageNamed:#"microphone.jpg"];
UIView* microphoneView = [[[UIView alloc] initWithFrame: CGRectMake(0,0,viewRect.size.width, microphone.size.height)] autorelease];
[microphoneView setBackgroundColor:[UIColor colorWithPatternImage:microphone]];
[microphoneView setIsAccessibilityElement:NO];
[tmp addSubview:microphoneView];
Finally I add a UIButton, UILabel and UIButtonBarItem. I add these last so they are on the top of the view hierarchy. I add accessibility labels and traits to them. Here is the UIButton:
self.recordImage = [UIImage imageNamed: #"record_button.png"];
self.stopRecordImage = [UIImage imageNamed: #"stop_button.png"];
self.recordButton.accessibilityTraits |= UIAccessibilityTraitStartsMediaSession;
self.recordButton = [[UIButton alloc ] initWithFrame: CGRectMake((viewRect.size.width - recordImage.size.width)/2 , (microphone.size.height + (grayBkg.size.height - recordImage.size.height)/2), recordImage.size.width, recordImage.size.height)];
[self.recordButton setIsAccessibilityElement:YES];
[self.recordButton setAccessibilityLabel: #"toggle recording start"];
[self.recordButton setImage: recordImage forState:UIControlStateNormal];
[self.recordButton addTarget: self action:#selector(processButton:) forControlEvents:UIControlEventTouchUpInside];
[tmp addSubview:recordButton];
finally
....
[self setView:tmp];
[tmp release];
I did call UIAccessibilityPostNotification(UIAccessibilityScreenChangedNotification, nil); when I push this view onto the stack.
With voiceover on, when the view is displayed I can swipe and give each of my elements (the UIButtonBarItem, UILabel, and UIButton) focus and I can activate them with double tap. However, VoiceOver speaks no information about the elements. Testing in the simulator with the Accessibility Inspector shows the labels I have set via aControl.accessibilityLabel = #"the label";
This view is used to record audio. If I activate the buttons and record the audio and stop recording, VoiceOver will now speak the labels for the elements when I focus them? Why is VoiceOver not speaking the information when the view first loads? Any clues appreciated!
I am testing on an iPad 2 with iOS 4.3.3.
If you'd like your view to not be accessible, use:
[microphoneView setUserInteractionEnabled:NO];
This view is being used for audio recording. The problem was that I was setting the AVSession Category to AVAudioSessionCategoryRecord in the viewDidLoad method. This was causing VoiceOver not to speak the view information. I modified the code to set the category to AVAudioSessionCategoryRecord only when the record button is pushed. And I set it to AVAudioSessionCategoryPlayAndRecord when recording is finished. Here is the thread that explains it fully: http://lists.apple.com/archives/accessibility-dev/2011/Jul/msg00002.html
I created a simple application using UIImagePickerViewController for capturing from the camera, but I'd like to customize the interface for grabbing from the camera, such as adding some buttons.
UIImagePickerViewController doesn't allow this directly, so how would you create a custom view that allows for displaying the live camera feed and capturing from it?
The easy way is to continue to use UIImagePickerViewController but set showsCameraControls to NO and provide your own user interface using cameraOverlayView.
The more difficult (but more flexible) way is to use the AVFoundation classes (particularly AVCaptureVideoPreviewLayer and AVCaptureStillImageOutput) to construct your own camera.
Yes, create a UIImagePickerController from code, adjust its properties, add an overlay onto it, and with you controller, control whatever you want on that overlay : custom controls, overlaying images, etc...
That gives something like this :
self.picker = [[UIImagePickerController alloc] init];
self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
self.picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
self.picker.cameraDevice = UIImagePickerControllerCameraDeviceRear;
self.picker.showsCameraControls = NO;
self.picker.navigationBarHidden = YES;
self.picker.toolbarHidden = YES;
self.picker.wantsFullScreenLayout = YES;
// Insert the overlay
self.overlay = [[OverlayViewController alloc] initWithNibName:#"Overlay" bundle:nil];
self.overlay.pickerReference = self.picker;
self.picker.cameraOverlayView = self.overlay.view;
self.picker.delegate = self.overlay;
[self presentModalViewController:self.picker animated:NO];
OverlayViewController is the controller that you must write to control everything you add onto the overlay.
pickerReference is a property you can keep to send orders to the camera. For example, you could call the following from an IBAction coming from a UIButton placed onto the overlay :
[self.pickerReference takePicture];
You need to set the value of showCameraControls to NO and provide your own custom overlay view using the cameraOverlayView.
I'm developing an app that needs to take two pictures in a row. I'm currently using the iPhone camera but :
I would like to NOT have the cancel
button on the bottom left
I would like to NOT have the preview of my picture (with the blue
button "use").
What should I do ? Should I make my own camera ? I couldn't find an easy tutorial for a custom camera with only a "take picture" button...
Create a UIImagePickerController from code, adjust its properties, add an overlay onto it, and with you controller, control whatever you want on that overlay: custom controls, overlaying images, etc...
That gives something like this :
self.picker = [[UIImagePickerController alloc] init];
self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
self.picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
self.picker.cameraDevice = UIImagePickerControllerCameraDeviceRear;
self.picker.showsCameraControls = NO;
self.picker.navigationBarHidden = YES;
self.picker.toolbarHidden = YES;
self.picker.wantsFullScreenLayout = YES;
// Insert the overlay
self.overlay = [[OverlayViewController alloc] initWithNibName:#"Overlay" bundle:nil];
self.overlay.pickerReference = self.picker;
self.picker.cameraOverlayView = self.overlay.view;
self.picker.delegate = self.overlay;
[self presentModalViewController:self.picker animated:NO];
OverlayViewController is the controller that you must write to control everything you add onto the overlay.
pickerReference is a property you can keep to send orders to the camera. For example, you could call the following from an IBAction coming from a UIButton placed onto the overlay:
[self.pickerReference takePicture];
The easiest way to do it is to use UIImagePickerController with showsCameraControls set to NO and a custom view set in cameraOverlayView; this view can have whatever buttons you need on it. When touched, the button should call takePicture on the image picker, and when you're done just use dismissModalViewControllerAnimated: to dismiss the picker.