I want to launch camera when my view controller loads. I tried calling takePhoto method in viewdidload but nothing happens, what did I do wrong? I am getting the following error msg:
"Attempt to present on whose view is not in the window hierarchy!"
When I inspect element UIImagePickerController, it is nil... Interestingly, I can place a button that calls this method and when I tap the button it works fine, but not when I call it in view did load...
- (IBAction)takePhoto {
UIImagePickerController *uiipc=[[UIImagePickerController alloc]init];
uiipc.delegate=self;
uiipc.mediaTypes=#[(NSString *)kUTTypeImage];
uiipc.sourceType=UIImagePickerControllerSourceTypeCamera|UIImagePickerControllerSourceTypePhotoLibrary;
uiipc.allowsEditing=YES;
[self presentViewController:uiipc animated:YES completion:NULL];
}
Try this: Call the camera from the view did appear method:
// makeCameraOff= YES; call this in didFinishPickingMediaWithInfo method
-(void)viewDidAppear:(BOOL)animated{
if (makeCameraOff==NO){
[self performSelector:#selector(takePic) withObject:nil afterDelay:0];
}
}
-(void)takePic{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate =self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:picker animated:YES completion:nil];
}
Related
I pushed modally to a new view controller using:
[self presentViewController:picker];
and then from within that new view controller I did;
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil];
But the camera won't even show, why?
I had the same problem on iPad and below code worked for me...
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
//present your view controller here...
}];
Good Luck !! :)
This might be due to couple of reasons:
1) Create a method of Camera Opening code:
-(void) openCamera {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil]; }
And call it like this Wherever you want,
[self performSelector:#selector(openCamera) withObject:nil afterDelay:0.1];
OR
2) Write code inside this method,
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
//... Camera Code ....
}];
I'm calling [picker dismissViewControllerAnimated:YES completion:NULL]; when user either chooses a picture from the library or cancels.
I'm also setting delegate to nil just to be sure but that doesn't help either.
Am I missing something?
-(void)callImagePickerDelegate:(CameraView *)sender{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
[self presentViewController:picker animated:YES completion:NULL];
self.imageFromLibrary.frame = CGRectMake(0, self.imageFromLibrary.frame.origin.y, self.imageFromLibrary.frame.size.width, self.imageFromLibrary.frame.size.width);}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[picker dismissViewControllerAnimated:YES completion:NULL];
[self.cameraView.session startRunning];
picker.delegate = nil;}
I think you have declared your picker as strong property that is why it is not releasing it's memory.
Declare your picker as weak property and then try .
Hope it helps.
You nil only delegate of picker not actual picker object. so set picker = nil, if you have't used ARC then also write picker = nil;[picker release];
On iOS 7 only, the navigation bar in my app does not respond to any touches after a UIImagePickerController is used and then dismissed (whether a pic has been selected or not). The screen below the navigation bar functions as normal, but it is now impossible to navigate Back in the app; the user is stuck on this screen.
I am launching the UIImagePickerController from code, though the rest of the app is laid out in storyboards.
UIImagePickerController *mediaUI = [[UIImagePickerController alloc] init];
mediaUI.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
mediaUI.mediaTypes = [NSArray arrayWithObject:(NSString *) kUTTypeImage];
mediaUI.allowsEditing = NO;
mediaUI.delegate = self;
[controller presentModalViewController: mediaUI animated: YES];
Thanks in advance for any help.
I hope you are performing these steps correctly!
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
[picker dismissViewControllerAnimated:YES completion:NULL];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[picker dismissViewControllerAnimated:YES completion:NULL];
}
And when you are calling
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:picker animated:YES completion:NULL];
Cheers!
I noticed that the log was showing "Unbalanced calls to begin/end appearance transitions for" the launching controller. I was launching the image picker controller immediately from another controller when it appeared. This works OK on iOS 8 but there needs to be a delay on iOS 7. I fixed it by calling my method after a brief delay:
[self performSelector:#selector(takePicture) withObject:nil afterDelay:.1];
I am writing an iOS app where, in a view there is a button. Clicking on that button gets an action sheet which has options to pick image from camera or gallery. After the image is picked, it should be passed on to another view by manually calling a segue. The image picker appears and the prepare for segue code is executed, but the segue doesnt appear. There are no errors and I have checked all identifiers etc. Here is the code:
-(IBAction)showButtonClicked:(id)sender {
UIActionSheet *photoActionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:#"Cancel" destructiveButtonTitle:nil otherButtonTitles:#"Take Photo", #"Choose from Library", nil];
photoActionSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent;
[photoActionSheet showInView:self.tabBarController.tabBar];
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
switch (buttonIndex) {
case 0:
{
[self dismissModalViewControllerAnimated:YES];
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentModalViewController:picker animated:YES];
break;
}
case 1:
{
[self dismissModalViewControllerAnimated:YES];
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
break;
}
default:
break;
}
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"goToPhotoDetails"]){
FostoPhotoDetailsViewController *photoDetails = (FostoPhotoDetailsViewController *)segue.destinationViewController;
photoDetails.imageView.image = self.buttonImage1;
}
}
- (void) imagePickerController:(UIImagePickerController *)picker
didFinishPickingImage:(UIImage *)image
editingInfo:(NSDictionary *)editingInfo
{
self.buttonImage1 = image;
//FostoPhotoDetailsViewController *photoDetails = [[FostoPhotoDetailsViewController alloc] init];
//photoDetails.imageView.image = image;
[self dismissModalViewControllerAnimated:NO];
NSLog(#"Test");
[self performSegueWithIdentifier:#"goToPhotoDetails" sender:self];
}
Sounds like you are executing a segue with style push without being inside a UINavigationController.
When you call performSegueWithIdentifier:sender: it first correctly calls prepareForSegue:sender: then it tries to retrieve the current navigation controller and push the destination controller doing something like
[self.navigationController pushViewController:destinationController animated:YES];
But since you are not inside a UINavigationController the property navigationController is set to nil, causing the above call to fail silently.
Either change the display style of your segue to something other than push (for instance modal) or embed you controller in a UINavigationController.
Here is the set up of my view:
When the UIBarButtonItem is clicked, it should bring up a UIImagePickerController. I have to do this using a UIPopoverController, which is invoked by clicking on the "reset" button, because it is necessary on the iPad. Here is my code:
-(IBAction) btnReset:(id)sender {
[self chooseImage];
}
-(void) chooseImage {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
imagepicker = [[UIImagePickerController alloc] init];
imagepicker.allowsEditing = NO;
imagepicker.delegate = self;
imagepicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagepicker.navigationBar.opaque = true;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
popoverController = [[UIPopoverController alloc] initWithContentViewController:imagepicker];
[popoverController presentPopoverFromBarButtonItem:reset permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];
} else {
[self presentModalViewController:imagepicker animated:YES];
}
}
}
However, when this is called, the view crashes with the error:
'NSInvalidArgumentException', reason: '-[UIPopoverController presentPopoverFromRect:inView:permittedArrowDirections:animated:]: Popovers cannot be presented from a view which does not have a window.'
What am I doing wrong? Thank you in advance.
It looks like you are trying to create a popover on an item which is not on the view hierarchy. If this method is being invoked by your button then change the method header to -(void) chooseImage:(id)sender and try presenting the popover from the UIBarButton you have on your toolbar.
Also if you are using ARC (which it looks like you are) you have to hold on to your UIPopover otherwise it will be released when it is still required see this stack overflow post. You may already be doing this but I thought I would raise it as a I can't see if/how you have specified your popoverController.