I tried this twice with two different apps and I get the same thing. I have a set up a UIImagePIckerController instance as follows:
- (IBAction)addImage:(UIBarButtonItem *)sender {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
NSArray *mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
if ([mediaTypes containsObject:(NSString *)kUTTypeImage]) {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeImage];
picker.allowsEditing = NO;
picker.showsCameraControls = NO;
[self presentViewController: picker animated:YES completion:NULL];
}
[..]
}
This was the second. In the first I set up a custom overlay to run the shutter and other functions. Everything runs fine but I keep getting an error on the console:
<Error>: CGAffineTransformInvert: singular matrix.
When I run the app, every time I rotate (or move about which signals a rotate) the device while the camera is up {something happens here}. I tried it on both my iPhone 4 and iPad Mini with the same results. After a lot of digging I found this only happen in the case where
picker.showsCameraControls = NO;
If I put
picker.showsCameraControls = YES;
Then I get no message (though my custom overlay is hidden too). Making sure it wasn't the custom overlay itself I tried leaving that out, and it still gives the error message.
Anybody got any ideas of what I should do about this?
I believe it to be largely benign as Apple's own PhotoPicker sample code generates this warning. Rotation has to do with matrices and while I'm not sure which matrix in particular is getting rotated, it is considered a mathematical violation to perform operations on matrices with a determinant of zero (similar to dividing by zero). Such a matrix is not invertible or 'singular':
http://en.wikipedia.org/wiki/Rotation_matrix
http://en.wikipedia.org/wiki/Determinant
http://en.wikipedia.org/wiki/Singular_matrix#singular
Related
I want my app to only use the front facing camera. So I've implemented the following code.
if ([UIImagePickerControllerisCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront]) {
self.imagePickerController.cameraDevice = UIImagePickerControllerCameraDeviceFront;
}
This works the first time I open up the camera (it is using the front facing camera). But if I cancel the photo and then re-enter into the camera it is using the rear facing camera.
With each cancel / re-enter into camera it switches between front and rear cameras...
Is there something I am missing?
Tr this code .I used this code and it is working fine .Use this code either in button action or viewwillappear or viewdidload and dismiss the camera view properly
imgPicker =[[UIImagePickerController alloc] init];
imgPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imgPicker.cameraDevice=UIImagePickerControllerCameraDeviceFront;
imgPicker.showsCameraControls = YES;
imgPicker.allowsEditing = YES;
imgPicker.delegate=self;
[self presentViewController:imgPicker
animated:NO completion:nil];
I was having the same problem and resolved the issue in my case by including autorelease on the call to allocate the UIImagePickerController as shown here
UIImagePickerController *cameraUI = [[[UIImagePickerController alloc] init] autorelease];
I have a UIImagePickerController (source type camera) that I use to take pictures. I have it put properly in my .h (added the #property) and .m (#synthesize). Here's what I use to show it:
if (thePicker == nil) {
thePicker = [[UIImagePickerController alloc] init];
thePicker.delegate = self;
thePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
thePicker.allowsEditing = NO;
}
[self presentModalViewController:thePicker animated:YES];
I'm having an odd problem. Every now and again, after closing/opening it a few times, the camera button OR the used button won't work (but the retake and cancel buttons work). I'm not getting any memory warnings and I have a dealloc and didReceiveMemoryWarnings void statement, but they don't get called.
ANyone else having this problem?
I have seen some apps cover it up with their overlay, but you can't remove it. AVCaptureSession really does sound more appropriate for your purposes. I see one example here:
http://www.musicalgeometry.com/?p=1273
Try this it may help u i guess Thanks!!
I am using the following function to activate either the device camera or the image picker depending on the result of a UIActionSheet. if fromCamera=YES then it works on both iPhone and iPad. if fromCamera=NO then it works on iPhone and the image picker appears. But it crashes on the iPad with the following error: UIStatusBarStyleBlackTranslucent is not available on this device. I already know that the iPad can't display the UIStatusBarStyleBlackTranslucent statusBar, but how do I avoid this crash?
-(void)addPhotoFromCamera:(BOOL)fromCamera{
if(fromCamera){
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
}
else{
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
}
[self presentModalViewController:picker animated:YES];
}
If you set the picker to UIImagePickerControllerSourceTypePhotoLibrary on the iPad, then you must(!) present it in a popoverview, otherwise you get exceptions. I do it like this, to atleast control the size of the popover (the standard size is too small in my opinion):
-(void)openPhotoPicker
{
imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagePicker.navigationBar.opaque = true;
//put the image picker in its own container controller, to control its size
UIViewController *containerController = [[UIViewController alloc] init];
containerController.contentSizeForViewInPopover = rightPane.frame.size;
[containerController.view addSubview:imagePicker.view];
//then, put the container controller in the popover
popover = [[UIPopoverController alloc] initWithContentViewController:containerController];
//Actually, I would like to do the following, but iOS doesn't let me:
//[rightPane addSubview:imagePicker.view];
//So, put the popover over my rightPane. You might want to change the parameters to suit your needs.
[popover presentPopoverFromRect:CGRectMake(0.0, 0.0, 10.0,0.0)
inView:rightPane
permittedArrowDirections:UIPopoverArrowDirectionLeft
animated:YES];
//There seems to be some nasty bug because of the added layer (the container controller), so you need to call this now and each time the view rotates (see below)
[imagePicker.view setFrame:containerController.view.frame];
}
I also have the following, to counter a rotation bug:
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
if(imagePicker!=nil && rightPane.frame.size.width>0)
[imagePicker.view setFrame:imagePicker.view.superview.frame];
}
It ain't perfect, but it is ok for my testing purposes at the moment. I consider writing my own Imagepicker, because I don't like being forced to use the popoverview... but well, that's a different story.
I suspect the UIImagePicker is inheriting the translucent status bar from your Info.plist file or from the currently displayed view controller.
What happens if you make the app not have a translucent status bar?
I was having a similar issue, take a look at my answer here:
https://stackoverflow.com/questions/7677058/uiimagepickercontroller-crash-in-ipad-ios5/7839969#7839969
Ok here is the code that I wrote to display the UIImagePickerController in the camera source. I just declared the myPhotopicker in the header for the property and retain it. Synthesized it in the main code file. Then calling the picker I wrote the code below:
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
if (myPhotopicker==nil) {
myPhotopicker = [[UIImagePickerController alloc] init];
myPhotopicker.delegate = self;
}// create once!
myPhotopicker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentModalViewController:myPhotopicker animated:NO];
}
Upon calling it, there are a few things that is weird happening to the app.
Sometimes, when there are many apps running in the background (iPhone4), the app would fail to load the camera and crash the app. Though it will load CameraRoll/PhotoAlbums without problem.
If the camera view is able to load (when there are less apps running in the background), tapping the Cancel button on the camera view results in the app rebooting itself (where the Default.png image is shown quickly, and back to the main page - like when we started the app).
I have been trying to figure out this problem, but not sure what to do... pls help.. Thanks.
here is the complete code of image pickercontrol try too find solu. here.
http://www.icodeblog.com/2009/07/28/getting-images-from-the-iphone-photo-library-or-camera-using-uiimagepickercontroller/
Regards,
Shyam Parmar
Rather than your 'create once' logic try creating and releasing each time.
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
myPhotopicker = [[UIImagePickerController alloc] init];
myPhotopicker.delegate = self;
myPhotopicker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentModalViewController:myPhotopicker animated:NO];
[myPhotopicker release];
}
You should also implement the delegate to remove the modal view controller from view when it is dismissed (if you haven't already).
You should also check that the current class conforms to the UINavigationConrollerDelegate protocol.
Can I programmatically turn on the camera flash on a new iPhone 4 device, before taking a picture with -takePicture?
I'm developing a photo taking app for iOS 4 and want to power on the flash light before the user takes a picture, so they can see the effect of the flash in advance.
The problem seems to be that for the flash light to stay on, you'll need to set the torchMode on and this is only possible in 'video mode' (UIImagePickerControllerCameraCaptureModeVideo), while you can only ask the UIImagePickerController to takePicture when it is on 'photo mode' (UIImagePickerControllerCameraCaptureModePhoto).
So, the following works, but only shows the flash light when taking a picture:
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.showsCameraControls = NO;
picker.navigationBarHidden = YES;
picker.toolbarHidden = YES;
picker.mediaTypes = [NSArray arrayWithObjects:#"public.image", nil];
picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
picker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn;
[self presentModalViewController:picker animated:YES];
And this also works (shows the torch the whole time), but then I cannot take a picture.
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.showsCameraControls = NO;
picker.navigationBarHidden = YES;
picker.toolbarHidden = YES;
picker.mediaTypes = [NSArray arrayWithObjects:(NSString *)kUTTypeMovie, nil];
picker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;
picker.cameraFlashMode = UIImagePickerControllerCameraFlashModeOn;
[self presentModalViewController:picker animated:YES];
When I try the toggleTorch code found here: Turn on torch/flash on iPhone there seems to not be any live video feed in the UIImagePickerController.
Are these UIImagePickerController and AVCaptureSession compatible with each other? or are you supposed to choose for either one or the other?
And does anybody know a workaround to get both the flash mode on (or torchMode) and to be able to takePicture?
Have a look at the WWDC 2010 sessions (specifically 409) where they go into functionality like the one you're looking for.
Essentially you need to move away from UIImagePickerController if you're looking to perform these custom camera functions and move towards AVFoundation classes.