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On the camera workflow, the photo is captured and on the next screen, let's call it choose-screen, you can choose if you want to use this photo or retake it.
How do I know, when the camera enteres the preview view?
My issue is that I have added a button to access the camera roll, which works fine. The obstacle is, when taking a photo and entering the preview view (2. Camera View), the button hides the "use photo" option. So I cannot select it. I want to hide the button when entering the preview view or just avoid the preview view.
Below my code
#import <UIKit/UIKit.h>
#import "CameraViewController.h"
#import <AssetsLibrary/AssetsLibrary.h>
@interface CamViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate>
@property (nonatomic, strong) UIImage *image;
@property (nonatomic, strong) UIImage *lastTakenImage;
- (IBAction)takePhoto:(id)sender;
- (IBAction)selectPhoto:(id)sender;
@end
#import "CamViewController.h"
@interface CamViewController ()
@end
@implementation CamViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
int isAction = 0; // Photo, 1: CameraRoll, 2: Cancel
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Error"
message:@"Device has no camera"
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles: nil];
[myAlertView show];
}
isAction = 0;
[self cameraRoll];
}
-(void)viewDidAppear:(BOOL)animated {
// isAction = 0 Photo, 1: CameraRoll, 2: Cancel
DLog(@"###### isAction> %d", isAction);
switch (isAction) {
case 1:
[self selectPhoto:nil];
break;
case 2:
[self dismissViewControllerAnimated:NO completion:nil];
break;
default:
[self takePhoto:nil];
break;
}
}
- (IBAction)takePhoto:(id)sender {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = NO;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.cameraOverlayView = [self addCameraRollButton]; // suggestion from omz
// [self addCameraRollButton:picker.view];
[self presentViewController:picker animated:YES completion:NULL];
}
-(void)prepareCameraRoll {
isAction = 1;
[self dismissViewControllerAnimated:NO completion:nil];
}
- (IBAction)selectPhoto:(id)sender {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:picker animated:YES completion:NULL];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
UIImage *chosenImage = info[UIImagePickerControllerEditedImage];
self.image = chosenImage;
isAction = 0;
[picker dismissViewControllerAnimated:YES completion:NULL];
[self performSegueWithIdentifier:@"toCameraView" sender:info];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
isAction = 2; // Cancel
[picker dismissViewControllerAnimated:YES completion:NULL];
}
# pragma mark - for the cameraOverlayView // suggestion from omz
- (UIView *)addCameraRollButton {
float startY = ([[UIScreen mainScreen] bounds].size.height == 568.0) ? 500.0 : 410.0;
UIButton *rollButton = [UIButton buttonWithType:UIButtonTypeCustom];
rollButton.frame = CGRectMake(230.0, startY, 60.0, 60.0);
rollButton.backgroundColor = [UIColor clearColor];
[rollButton setImage:self.lastTakenImage forState:UIControlStateNormal];
rollButton.imageView.contentMode = UIViewContentModeScaleAspectFill;
[rollButton addTarget:self action:@selector(prepareCameraRoll) forControlEvents:UIControlEventTouchUpInside];
return rollButton;
}
# pragma mark - CameraRoll function and presentation
- (void)addCameraRollButton:(UIView *)picker {
float startY = ([[UIScreen mainScreen] bounds].size.height == 568.0) ? 500.0 : 410.0;
UIButton *rollButton = [UIButton buttonWithType:UIButtonTypeCustom];
rollButton.frame = CGRectMake(230.0, startY, 60.0, 60.0);
rollButton.backgroundColor = [UIColor clearColor];
[rollButton setImage:self.lastTakenImage forState:UIControlStateNormal];
rollButton.imageView.contentMode = UIViewContentModeScaleAspectFill;
[rollButton addTarget:self action:@selector(prepareCameraRoll) forControlEvents:UIControlEventTouchUpInside];
[picker addSubview:rollButton];
}
-(void)cameraRoll {
ALAssetsLibrary *assetsLibrary = [[ALAssetsLibrary alloc] init];
[assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos
usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
if (nil != group) {
// be sure to filter the group so you only get photos
[group setAssetsFilter:[ALAssetsFilter allPhotos]];
[group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *asset, NSUInteger index, BOOL *stop) {
if (asset) {
ALAssetRepresentation *repr = [asset defaultRepresentation];
// UIImage *img = [UIImage imageWithCGImage:[repr fullResolutionImage]];
UIImage *img = [UIImage imageWithCGImage:[repr fullScreenImage]];
[self setLastTakenImage:img];
*stop = YES;
}
}];
}
*stop = NO;
} failureBlock:^(NSError *error) {
NSLog(@"error: %@", error);
}];
}
#pragma mark - Navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
CameraViewController *cvc = [segue destinationViewController];
cvc.image = self.image;
DLog(@"%@, cvcimage", cvc.image);
}
@end
832
On iPhone 11 models, iPhone 12 models, iPhone 13 models, and iPhone 14 models, the camera preview displays content outside the frame to show you what can be captured by using another lens in the camera system with a wider field of view.
On iPhone 11 models, iPhone 12 models, and iPhone 13 models, the camera preview displays content outside the frame to show you what can be captured by using another lens in the camera system with a wider field of view. To turn off this display, go to Settings > Camera, then turn off View Outside the Frame.
Well, here is how to preserve iPhone camera settings. Once done, you no longer will have to change the camera setting every time. First, launch the Settings app on your iPhone. Go to Camera settings. There you will see the option “ Preserve Settings ” option. Tap on it.
Learn about advanced iPhone camera features that let you capture photos faster, apply tailored and enhanced looks to your photos, and view content outside the camera frame.
This allows me to use my iphone like an external web camera, connected via USB-C, which looks much better than the icam native to my MacBook Pro. Note: Notifications from other apps may still come on screen and show in the view. Disable notifications before going live. Show activity on this post.
Found a solution. Was hard to find, but finally got it. The solution is described at UIImagePicker cameraOverlayView appears on Retake screen. Additionally I add my working code for others who have the same problem.
The use of the NSNotificationCenter with @"_UIImagePickerControllerUserDidCaptureItem" and @"_UIImagePickerControllerUserDidRejectItem" is the key!
#import <UIKit/UIKit.h>
#import "CameraViewController.h"
#import <AssetsLibrary/AssetsLibrary.h>
@interface CamViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate>
@property (nonatomic, strong) UIImage *image;
@property (nonatomic, strong) UIImage *lastTakenImage;
@property (nonatomic, strong) UIImagePickerController *picker;
- (IBAction)takePhoto:(id)sender;
- (IBAction)selectPhoto:(id)sender;
@end
#import "CamViewController.h"
@interface CamViewController ()
@end
@implementation CamViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
int isAction = 0; // Photo, 1: CameraRoll, 2: Cancel
- (void)viewDidLoad
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNotification:) name:@"_UIImagePickerControllerUserDidCaptureItem" object:nil ];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNotification:) name:@"_UIImagePickerControllerUserDidRejectItem" object:nil ];
[super viewDidLoad];
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Error"
message:@"Device has no camera"
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles: nil];
[myAlertView show];
}
isAction = 0;
[self cameraRoll];
}
-(void)handleNotification:(NSNotification *)message {
if ([[message name] isEqualToString:@"_UIImagePickerControllerUserDidCaptureItem"]) {
// Remove overlay, so that it is not available on the preview view;
self.picker.cameraOverlayView = nil;
}
if ([[message name] isEqualToString:@"_UIImagePickerControllerUserDidRejectItem"]) {
// Retake button pressed on preview. Add overlay, so that is available on the camera again
self.picker.cameraOverlayView = [self addCameraRollButton];
}
}
-(void)viewDidAppear:(BOOL)animated {
// isAction = 0: Photo, 1: CameraRoll, 2: Cancel
DLog(@"###### isAction> %d", isAction);
switch (isAction) {
case 1:
[self selectPhoto:nil];
break;
case 2:
[self dismissViewControllerAnimated:NO completion:nil];
break;
default:
[self takePhoto:nil];
break;
}
}
- (IBAction)takePhoto:(id)sender {
self.picker = [[UIImagePickerController alloc] init];
self.picker.delegate = self;
self.picker.allowsEditing = YES; // if this is NO or missing, the image the image will not be in info[UIImagePickerControllerEditedImage]
self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
self.picker.cameraOverlayView = [self addCameraRollButton];
[self presentViewController:self.picker animated:YES completion:NULL];
}
-(void)prepareCameraRoll {
isAction = 1;
[self dismissViewControllerAnimated:NO completion:nil];
}
- (IBAction)selectPhoto:(id)sender {
self.picker = [[UIImagePickerController alloc] init];
self.picker.delegate = self;
self.picker.allowsEditing = YES;
self.picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:self.picker animated:YES completion:NULL];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
self.image = info[UIImagePickerControllerEditedImage];
isAction = 0;
[picker dismissViewControllerAnimated:YES completion:NULL];
[self performSegueWithIdentifier:@"toCameraView" sender:info];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
isAction = 2; // Cancel
[picker dismissViewControllerAnimated:YES completion:NULL];
}
# pragma mark - CameraRoll function and presentation
- (UIView *)addCameraRollButton {
float startY = ([[UIScreen mainScreen] bounds].size.height == 568.0) ? 500.0 : 410.0;
UIButton *rollButton = [UIButton buttonWithType:UIButtonTypeCustom];
rollButton.frame = CGRectMake(230.0, startY, 60.0, 60.0);
rollButton.backgroundColor = [UIColor clearColor];
[rollButton setImage:self.lastTakenImage forState:UIControlStateNormal];
rollButton.imageView.contentMode = UIViewContentModeScaleAspectFill;
[rollButton addTarget:self action:@selector(prepareCameraRoll) forControlEvents:UIControlEventTouchUpInside];
return rollButton;
}
-(void)cameraRoll {
// have to import assetlibrary framework!!!
ALAssetsLibrary *assetsLibrary = [[ALAssetsLibrary alloc] init];
[assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos
usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
if (nil != group) {
// be sure to filter the group so you only get photos
[group setAssetsFilter:[ALAssetsFilter allPhotos]];
[group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *asset, NSUInteger index, BOOL *stop) {
if (asset) {
ALAssetRepresentation *repr = [asset defaultRepresentation];
// UIImage *img = [UIImage imageWithCGImage:[repr fullResolutionImage]];
UIImage *img = [UIImage imageWithCGImage:[repr fullScreenImage]];
[self setLastTakenImage:img];
*stop = YES;
}
}];
}
*stop = NO;
} failureBlock:^(NSError *error) {
NSLog(@"error: %@", error);
}];
}
#pragma mark - Navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
CameraViewController *cvc = [segue destinationViewController];
cvc.image = self.image;
DLog(@"%@, cvcimage", cvc.image);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
@end
In swift 4 for future references. I'm using isHidden because I had problems to show it back when the user select Retake.
NotificationCenter.default.addObserver(forName: Notification.Name("_UIImagePickerControllerUserDidCaptureItem"),
object: nil,
queue: nil)
{
_ in
overlayView.isHidden = true
overlayView.isUserInteractionEnabled = false
}
NotificationCenter.default.addObserver(forName: Notification.Name("_UIImagePickerControllerUserDidRejectItem"),
object: nil,
queue: nil)
{
_ in
overlayView.isHidden = false
overlayView.isUserInteractionEnabled = true
}
Just posting here for future Swift references, if anyone needs it.
I've been having the same issue, and after a day of research, with a lot of trail and error, I found a way that removes the cameraOverlayView from the image preview.
When you take a photo the "_UIImagePickerControllerUserDidCaptureItem" triggers. Luckily we can utilize this by creating an observer with a closure. Inside the closure we can set the cameraOverlayView to nil, and thereby removing your custom view before entering preview.
This works in Xcode Version 8.1 (8B62), with Swift 3.
I have added the code snippet for you to utilize if needed.
NotificationCenter.default.addObserver(forName: NSNotification.Name(rawValue: "_UIImagePickerControllerUserDidCaptureItem"), object:nil, queue:nil, using: { note in
self.imagePicker.cameraOverlayView = nil
)}
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