IOS 10 UIImagePickerController Delegate Not Being Called - ios

I have setup the following to select an image whilst using an IPad. The problem is that the delegate never seems to get called. I've placed breakpoints in but they are never activated.
.H
#interface HomeViewController : UIViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate>
.M
- (IBAction)loadImage:(id)sender {
self.imagePickerController = [[UIImagePickerController alloc] init];
self.imagePickerController.modalPresentationStyle = UIModalPresentationCurrentContext;
self.imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
self.imagePickerController.allowsEditing = NO;
self.imagePickerController.delegate = self;
[self presentViewController:self.imagePickerController animated:YES completion:nil];
}
// This method is called when an image has been chosen from the library or taken from the camera.
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
//You can retrieve the actual UIImage
UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage];
//Or you can get the image url from AssetsLibrary
NSURL *path = [info valueForKey:UIImagePickerControllerReferenceURL];
[picker dismissViewControllerAnimated:YES completion:nil];
}
Can anyone see the issue?
Thanks

if you used Xcode8 to run the project, please check the project's info.plist, make sure there is a key for "Privacy Photo library usage".
your code is right, maybe the problem is the info.plist.

I had a similar issue and it turned out that the picker was being garbage collected as soon as the image was picked, so the delegate wasn't called.
I needed to ensure that a strong reference to the picker was made before presenting it.
Once that was done, it worked fine.

Related

Xcode 8 UIImagePickerController frozen

I just run into this problem. I can call UIImagePickerController as usual but when I pick an Image(taking a photo or photo library), the "use photo" button and "retake" button don't work, and the UI just freezes.
I have done some debugging and found the code won't get into the delegate method.
I didn't change any code about UIImagePickerController. Everything works just fine before. So I'm wondering why this happened and how to fix this bug?
Thanks a lot!
Here is the code :
UIImagePickerController * imgPicker = [[UIImagePickerController alloc] init];
[imgPicker setDelegate:self]
[imgPicker setAllowsEditing:YES];
[imgPicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
[self.navigationController presentViewController:imgPicker animated:YES completion:^{
}];
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo {
[self dismissViewControllerAnimated:YES completion:^{
}];
}
I figure this out.This is caused by using the wrong delegate method.the one I was using has been DEPRECATED.
We should use this one
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info;
and the image information is in the info dictionary.You can get the image in this way
UIImage *image = [info objectForKey:#"UIImagePickerControllerOriginalImage"];
From xcode 8 with ios 10 you have to add some key value to the info.plist for accessing the photos using UIImagepicker Controller
Key : Privacy - Photo Library Usage Description
Value : This app requires access to the photo library

how do i return an NSString or NSUrl from my didFinishPickingMediaWithInfo?

Good day, I am trying to implement the UIImagePickerController inside my selectFile function. (followed this tutorial in appcoda) but code below is a bit tweaked now based on what i want
#implementation FileBrowser
-(void)selectFile{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = NO;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:picker animated:YES completion:NULL];
}
#pragma mark - Image Picker Controller delegate methods
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSURL *refURL = [info valueForKey:UIImagePickerControllerReferenceURL];
NSString *myURL = [refURL absoluteString]; //not in tutorial, I'm trying to grab the url/path of the image here, with an intention of returning it to "callFileBrowser"
[picker dismissViewControllerAnimated:YES completion:NULL];
}
#end
Based on what i understood, my imagePickerController function is called when user selects an image. My question is how do i return(or get) the url instead? I have a C function on the same file (but outside #implemetation), this function calls my selectFile and is supposed to return the url/path of what the user has chosen.
char* callFileBrowser(){
[fileBrowser selectFile];
//return myURL here;
}
I hope i was able to explain everything properly. Any advice would greatly be appreciated. thanks.
I don't think it is possible with the current design. callFileBrowser() is called to pick a image, then immediately it is required to return a value. We don't know when user will be done picking, I suggest you to post a notification in didFinishPickingMediaWithInfo when the url is ready to notify other object who needs it.

Post more than one photo - two UIImagePickerController's

I'm having a slight issue here.
I have a basic view which has two UIButtons and two UIImageViews, I would like my users to be able to take two different photos, and these to be attached to their respective UIImageView.
Right now this works fine for the first UIButton/image, but not with a second.
.h
#interface ViewController : UIViewController <UIImagePickerControllerDelegate> {
// First button/imageview
UIImagePickerController *picker;
UIImage *image;
// Second button/imageview
UIImagePickerController *picker2;
UIImage *image2;
}
.m
-(IBAction)TakePhoto
{
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
[picker setSourceType:UIImagePickerControllerSourceTypeCamera];
[self presentViewController:picker animated:YES completion:NULL];
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
image2 = [info objectForKey:UIImagePickerControllerOriginalImage];
[imageField2 setImage:image2];
[self dismissViewControllerAnimated:YES completion:NULL];
}
This all works great but my question is how can I hook up the second picker to a new imagePickerController method so that my user can take two different photos on this view? I know that if I created a new action with the picker2 information it will still point to the one imagePickerController method, creating a second method and renaming this to suit does not work.
Any advice & help would be greatly appreciated.
Jamie
You don't need two UIImagePickerControllers to do it.
Take a look at takePicture method of UIImagePickerController which programatically initiates still image capture.
You can initiate additional captures after receiving imagePickerController:didFinishPickingMediaWithInfo: delegate callback.
PhotoPicker is a sample project from Apple which does exactly what you are trying to do.
Hope it helps.

Capture image with out saving on Device using UIImagePickerController

Hi is it possible to capture an Image with out saving to ios device .This is a question that is worrying me.
Can any please give me an idea how to achieve it.
Yes it is possible:
- (void)takePhoto
{
UIImagePickerController * pc = [[UIImagePickerController alloc] init];
pc.sourceType = UIImagePickerControllerSourceTypeCamera;
pc.delegate = self;
pc.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
pc.allowsEditing = YES;
[self presentViewController:pc animated:YES completion:^{
}];
}
#pragma mark - UIImagePickerController Delegate
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[picker dismissViewControllerAnimated:YES completion:^{
UIImage * image = [info valueForKey:#"UIImagePickerControllerOriginalImage"];
self.imageView.image = image;
}];
}
Edit:
If you want to save the image you can simply save it to the Caches directory (see the apple docs for NSFileManager for info on how to do this, or other stack overflow questions. This is preferred to NSUserDefaults although that would work too.
If you want to simply send it (via email, share, or API upload) you dont have to save it first. You can use the in-memory version that resides in the self.imageView.image property above.

iPad UIImagePicker Problem !

iam trying import an image from photos library but when i press the import button program crashes and received SGIBART !! but my code works fine on iPhone why ?
here is my code :
.h :
#interface CameraViewController : UIViewController <UIImagePickerControllerDelegate ,UINavigationControllerDelegate> {
UIImagePickerController *ipc;
UIImageView * image1;
#property (.......................;
}
.m :
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
image1.image = [[info objectForKey:UIImagePickerControllerOriginalImage]retain];
[[picker parentViewController]dismissModalViewControllerAnimated:YES];
[picker release];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[[picker parentViewController]dismissModalViewControllerAnimated:YES];
[picker release];
}
-(IBAction) importImage1 {
ipc = [[UIImagePickerController alloc]init];
ipc.delegate = self;
ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:ipc animated:YES];
}
You're crashing because you're releasing picker, but you didn't retain it. You should remove the calls to [picker release].
You should switch to using accessors for all of your ivars. Accessors and dealloc are generally the only places you should retain or release your ivars. picker is not your ivar and you didn't create it, so you shouldn't be releasing it at all.
You should spend some time with the Memory Management Programming Guide. You can get the short version at Three Magic Words.
On the iPad iOS 3.2 a UIImagePickerController must be presented in a popover, not as a modal view.
check this out :
http://www.cocos2d-iphone.org/forum/topic/6108

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