Programmatically take X amount of pictures - ios

I am trying to implement a feature of taking X amount of pictures programmatically after entering a UIViewController for both the iPhone and iPad. I looked into UIImagePickerController but I do not want to present the camera controls and have the user hit a button to capture only one photo. Is there a way to capture X amount of photos once entering a UIViewController and storing all the photos in the end for future reference in one go?
Edit:
-(void)viewDidAppear:(BOOL)animated
{
// Create image picker controller
picker = [[UIImagePickerController alloc] init];
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
[picker setSourceType:UIImagePickerControllerSourceTypeCamera];
}
else
{
[picker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
}
// Set source to the camera
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
// Delegate is self
picker.delegate = self;
// Allow editing of image ?
picker.allowsEditing = NO;
//picker.showsCameraControls = NO;
// Show image picker
[picker animated:YES completion:nil];
}

straight away with takePicture you can not take multiple snaps, for that you have to use some video recording and get snap out of it for particular frame or time, for you more reference you can use this apple documentation for bulk snaps AVFoundation Programming Guide

You can try something like this:
int numberOfPhotos = 3; // Number of photos you want to take.
for ( int i = 0; i < numberOhPhotos; i++ )
{
// Note that you should use some sort of a pause in between each photo.
[picker takePicture];
}

Related

How to set allowsEditing for UIImagePickerController only for videos selected from photo library in iOS?

I'm using UIImagePickerController in my applicaiton.
I'm showing the following alert in button action.
My code looks like the following in alertview delegate method:
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if ([alertView.title isEqualToString:#"Choose"]) {
if (buttonIndex == 1) { //Camera
[self presentImagePickerControllerWithCamera:YES];
}
else if(buttonIndex == 2) { //Library
[self presentImagePickerControllerWithCamera:NO];
}
}
}
and the content of the method 'presentImagePickerControllerWithCamera' is:
- (void)presentImagePickerControllerWithCamera:(BOOL)isCamera {
CFStringRef mTypes[2] = { kUTTypeImage, kUTTypeMovie };
CFArrayRef mTypesArray = CFArrayCreate(CFAllocatorGetDefault(), (const void**)mTypes, 2, &kCFTypeArrayCallBacks);
imagePickerController.mediaTypes = (__bridge NSArray*)mTypesArray;
imagePickerController.videoMaximumDuration = 60.0f;
CFRelease(mTypesArray);
if (isCamera) { // Showing the camera (Both Camera and video)
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.videoQuality = UIImagePickerControllerQualityTypeMedium;
imagePickerController.allowsEditing = NO;
}
else { // Showing library (Both Pictures and videos)
imagePickerController.allowsEditing = YES;
imagePickerController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
}
[self presentViewController:imagePickerController animated:YES completion:nil];
}
Here i need to limit the video to 1 min when user is selecting video from library, so i wrote
imagePickerController.videoMaximumDuration = 60.0f;
and
imagePickerController.allowsEditing = YES;
it's working fine. But When the user selects a picture from library i don't want editing(the square box on picture).
Is there any way to achieve it?
Any suggestions would be appreciated.
Thanks in advance.
This isn't possible with your current code.
You've assigned both the media types together. That will show you both image& video in to photo gallery. Once UIImagePickerController will show you'll not have access to it, I mean you can't know what user will select (an image or a video) before delegate get call.
So to achieve this with your case, you've to set each media type at once. And based on that media type, have to set allowsEditing property.

iOS 7 UIImagePicker preview black screen

When i try to load camera from my code, camera preview is black. If I wait for 10-20 seconds it will show real camera preview. I found several questions and some of them suggest that running some other code in background should be the reason for this. However I don't have any code running in background.
How should I fix this?
This is my code where I run camera
UIImagePickerController *photoPicker = [[UIImagePickerController alloc] init];
photoPicker.delegate = self;
photoPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:photoPicker animated:YES completion:NULL];
About 5 months ago my team discovered a memory leak with UIImageViewController in iOS7. Each instantiation slowed down the app exponentially (i.e. first alloc-init had a 1 second delay, second had a 2 second delay, third had a 5 second delay). Eventually, we were having 30-60 delays (similar to what you're experiencing).
We resolved the issue by subclassing UIImagePickerController and making it a Singleton. That way it was only ever initialized once. Now our delay is minimal and we avoid the leak. If subclassing isn't an option, try a class property in your viewController and just lazy load it like so.
-(UIImagePickerController *)imagePicker{
if(!_imagePicker){
_imagePicker = [[UIImagePickerController alloc]init];
_imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
}
return _imagePicker;
}
Then you can just call it later like:
[self presentViewController:self.imagePicker animated:YES completion:nil];
Had this myself - it happens if something is running on the main dispatch thread - are you resizing images by any chance?
It puts the preview onto the main thread and if something is using it, you get a black screen. It's a bug and the workaround is to either take over the main thread or to disable the photo picker until the queue is free
This Should work for you:
- (void)cameraViewPickerController:(UIImagePickerController *)picker
{
[self startCameraControllerFromViewController: picker
usingDelegate: self];
}
- (BOOL) startCameraControllerFromViewController: (UIViewController*) controller
usingDelegate: (id <UIImagePickerControllerDelegate,
UINavigationControllerDelegate>) delegate {
if (([UIImagePickerController isSourceTypeAvailable:
UIImagePickerControllerSourceTypeCamera] == NO)
|| (delegate == nil)
|| (controller == nil))
return NO;
UIImagePickerController *cameraUI = [[UIImagePickerController alloc] init];
cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;
// Displays a control that allows the user to choose movie capture
cameraUI.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeImage, (NSString *) kUTTypeMovie,nil];
// Hides the controls for moving & scaling pictures, or for
// trimming movies. To instead show the controls, use YES.
cameraUI.allowsEditing = NO;
cameraUI.delegate = delegate;
[controller presentViewController:cameraUI animated:YES completion:nil];
return YES;
}

UiImagePickerController - more than one photo

Iphone app, IOS 5 and up.
There are similar questions to this one on SO but I haven't encountered this exact scenario so I'll ask. I'm editing an existing app that allows lets you take a photo which it resizes and sends to a web service.
I need to add the ability to take 3 photos, resize each and send to the same service. I thought it would be just a matter of repeating what was already in the app but it uses the UIImagePickerController which apparently only allows one photo per use.
So the way it works is that there's a 'Take Photo' button which calls the method below. Once that photo is taken another button appears that says 'Take another photo' (I added this button) and I have it calling the same method but it is just copying over the previous photo, which is to be expected really. How should I best alter this to accommodate 3 photos?
This is the takephoto method that I'm calling.
- (IBAction)takePhoto:(id)sender
{
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.delegate = self;
[self presentViewController:imagePickerController animated:YES completion:NULL];
}
check this https://developer.apple.com/library/ios/samplecode/photopicker/Introduction/Intro.html
, check the take photo part of this demo project.
Eventually figured out how to do this. I added a tag to the button calling the method, through IB.
Then in the takephoto method I assigned the imagePickerController a tag based on the tag of the button that tapped. Like this:
- (IBAction)takePhoto:(id)sender
{
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
if([sender tag] == 2)
{
imagePickerController.view.tag = 2;
}
//And so on...
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.delegate = self;
[self presentViewController:imagePickerController animated:YES completion:NULL];
}
Then in the ImagePickerController didFinishedPickingMediaWithInfo method:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
if(picker.view.tag == 2)
{
//Do stuff here
}
}
So, I'll probably have to create three different buttons for each of the three possible photos, I'm sure there's a better way than that but it should work.

How do I load an image from the photo roll and add other images from the roll on top of it, possibly sort it, and save the final product?

I'm trying to make some composite images from currently existing ones in the photo rolls.
I have code that seems to work that loads an image from the photo roll onto a UIImageView and displays it to the user; (here's the Action that does that:)
- (IBAction)grabImage:(id)sender
{
if ([_myPopoverController isPopoverVisible])
[_myPopoverController dismissPopoverAnimated:YES];
else
{
if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeSavedPhotosAlbum])
{
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagePicker.mediaTypes = [NSArray arrayWithObjects: (NSString *) kUTTypeImage, nil];
imagePicker.allowsEditing = NO;
_myPopoverController = [[UIPopoverController alloc] initWithContentViewController:imagePicker];
_myPopoverController.delegate = self;
[_myPopoverController presentPopoverFromRect: [sender frame] inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES ];
_newMedia = NO;
}
}
}
next I want to be able to select more photos, but instead of replacing the current one I want them to be layered one on top of another. Finally, when the user is done layering images, I want them to be able to save the final product to the photo roll.
How do I implement this? Not sure where to start...
thanks in advance,
marina
It turns out that all that was needed to do this is just add CALayers to an UIImageView with various degrees of alpha; instead of wiping out the previous image and replacing it with a new one, I simply add differently alpha's layers of images. Works like a charm!

How to detect UIImagePickerController Preview state?

I use standart image picker to make some camera photo.
When user makes photo image picker shows him the Preview screen with 2 buttons "Retake" and "Use".
How to detect that Preview screen is active now or "Retake" button pressed? Is it possible ? Are the useful properties or events? Something like when image source is library the is property - allows editing, which shows similar screen .
UIImagePickerController * imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
A bit after the fact, but maybe someone is still seeking this answer like I was. If you want continue using the native camera controls, you can check the subviews of the ImagePickerController to determine if the post-record view is showing.
BOOL videoTaken = NO;
for (UIView *aView in self.imagePickerController.view.subviews[0].subviews[0].subviews[0].subviews)
{
if ([aView isKindOfClass:NSClassFromString(#"PLTileContainerView")])
{
videoTaken = YES;
break;
}
}
The "PLTileContainerView" is the subview that contains the editing slider that lets you view your video frame by frame, so if it's present, that means your video has already recorded.
For use:
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[picker dismissModalViewControllerAnimated:NO];
NSString *type = [info objectForKey:#"UIImagePickerControllerMediaType"];
if ([type isEqualToString:#"public.movie"]) {
} else {
UIImage *image = [info objectForKey:#"UIImagePickerControllerOriginalImage"];
}
}
For Cancel you don't have a way of detecting it (other than subclassing UIImagePickerController, which may be prohibited, or other way that I'm not aware), but for sure the second cancel is detectable :
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[picker dismissModalViewControllerAnimated:YES];
}

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