I am having an interesting little problem using the uiimagepickercontroller and was wondering if anyone has any insight as to what might be happening. Users can take pictures with the camera or pick from the photo library until the cows come home as many times in a row as they like. My issue lies in allowing users to revert back to the original image that shipped with the app. Here is the flow:
Users go the the tableview which shows a thumbnail of the image.
Users navigate to the detail view which shows a larger view of the image.
Users can tap on the image in the detail view to bring up a custom alertcontroller with options to a) use the camera to take a picture, b) use a picture from their library, or c) revert back to the original image.
Users choose either option 'a' or option 'b' to either take a picture or use a picture from the photo library. IF they IMMEDIATELY change their mind about using one of those choices and want to just go back to using the original image, nothing happens! They can snap another picture or choose another image right away, but cannot revert back to the original image right away.
Reverting back to the original image DOES work perfectly when the app has been closed and then opened again. Sometimes it will work if you navigate around to other views within the app and then come back to the detail view where they just added their own image. By why the delay? I've searched around for two weeks but have not found anything resembling my problem or any solutions that help in any way (like reloading the headerview where image is sitting). Any thoughts?
Also I have figured out how to save the image to iCloud by using the documentation but cannot figure out how to retrieve them so there is no code for that. That is entirely different question. The same thing seems to occur even without that code.
Thanks for taking the time to look at this!
Here is some code:
-(void)bookImageTapped:(UIGestureRecognizer *)gesture
{
URBAlertView *changeImageAlertView = [[URBAlertView alloc] initWithTitle:#"Add A New Book Cover Image" message:nil cancelButtonTitle:#"Cancel" otherButtonTitles:#"Use Camera", #"Open Gallery", #"Use Original Photo", nil];
[changeImageAlertView setHandlerBlock:^(NSInteger buttonIndex, URBAlertView *alertView) {
[self checkPermission];
if (PHAuthorizationStatusAuthorized)
{
if(buttonIndex == 0)
{
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
UIImagePickerController *pickerController = [[UIImagePickerController alloc] init];
pickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
pickerController.delegate = self;
pickerController.allowsEditing = NO;
pickerController.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
[self presentViewController:pickerController animated:YES completion:nil];
}];
[alertView hide];
}
else
{
NSLog(#"Camera not available");
[alertView hide];
}
}
else if (buttonIndex == 1)
{
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
UIImagePickerController *pickerController = [[UIImagePickerController alloc] init];
pickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
pickerController.delegate = self;
pickerController.allowsEditing = NO;
pickerController.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
[self presentViewController:pickerController animated:YES completion:nil];
}];
[alertView hide];
}
else if (buttonIndex == 2)
{
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[self restoreOriginalPhoto];
}];
[alertView hide];
}
else
{
NSLog(#"button 2 cancel");
[alertView hide];
}
}
}];
[changeImageAlertView show];
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(nonnull NSDictionary<NSString *,id> *)info
{
[picker dismissViewControllerAnimated:YES completion:nil];
_book.largeBookImage = [info objectForKey:UIImagePickerControllerOriginalImage];
_book.largeBookImage = [self scaleImage:_book.largeBookImage toSize:CGSizeMake(120, 168)];
_bookImageView.image = _book.largeBookImage;
_book.wasNewImageAdded = YES;
_book.originalImageUsed = NO;
NSString * documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
[self saveImage:_book.largeBookImage withFileName:_book.bookImageID ofType:#"jpg" inDirectory:documentsDirectory];
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[picker dismissViewControllerAnimated:YES completion:nil];
}
-(void)saveImage:(UIImage *)image withFileName:(NSString *)imageName ofType:(NSString *)extension inDirectory:(NSString *)directoryPath
{
if ([[extension lowercaseString] isEqualToString:#"png"])
{
[UIImagePNGRepresentation(image) writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.%#", imageName, #"png"]] options:NSAtomicWrite error:nil];
//Create a URL to the local file
NSURL *resourceURL = [NSURL fileURLWithPath:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.%#", imageName, #"png"]]];
if (resourceURL)
{
CKAsset *asset = [[CKAsset alloc] initWithFileURL:resourceURL];
//create a record object
CKRecord *bookCover = [[CKRecord alloc] initWithRecordType:#"Bookcover"];
//set the record's fields
bookCover[#"title"] = _book.title;
bookCover[#"bookImage"] = asset;
/* TO SAVE A RECORD */
//get the public database
CKContainer *appContainer = [CKContainer defaultContainer];
CKDatabase *publicDatabase = [appContainer publicCloudDatabase];
[publicDatabase saveRecord:bookCover completionHandler:^(CKRecord *bookCover, NSError *error) {
if (error)
{
//insert error handling
return;
}
//insert succesfully saved record code
NSLog(#"png record saved after using picker!");
}];
}
}
else if ([[extension lowercaseString] isEqualToString:#"jpg"] || [[extension lowercaseString] isEqualToString:#"jpeg"])
{
[UIImageJPEGRepresentation(image, 1.0) writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.%#", imageName, #"jpg"]] options:NSAtomicWrite error:nil];
//Create a URL to the local file
NSURL *resourceURL = [NSURL fileURLWithPath:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.%#", imageName, #"jpg"]]];
if (resourceURL)
{
CKAsset *asset = [[CKAsset alloc] initWithFileURL:resourceURL];
//create a record object
CKRecord *bookCover = [[CKRecord alloc] initWithRecordType:#"Bookcover"];
//set the record's fields
bookCover[#"title"] = _book.title;
bookCover[#"bookImage"] = asset;
/* TO SAVE A RECORD */
//get the public database
CKContainer *appContainer = [CKContainer defaultContainer];
CKDatabase *publicDatabase = [appContainer publicCloudDatabase];
[publicDatabase saveRecord:bookCover completionHandler:^(CKRecord *bookCover, NSError *error) {
if (error)
{
//insert error handling
return;
}
//insert succesfully saved record code
NSLog(#"jpg record saved after using picker!");
}];
}
}
else
{
NSLog(#"Image Save Failed\nExtension: (%#) is not recognized, use (PNG/JPG)", extension);
}
}
- (UIImage *) scaleImage:(UIImage*)image toSize:(CGSize)newSize
{
UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
[image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
-(void)restoreOriginalPhoto
{
NSLog(#"restore photo called");
_book.originalImageUsed = YES;
_book.wasNewImageAdded = NO;
_bookImageView.image = _book.largeBookImage;
NSString * documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
[self saveImage:_book.largeBookImage withFileName:_book.bookImageID ofType:#"jpg" inDirectory:documentsDirectory];
}
Here is the headerview with the imageview:
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
_headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, 26)];
_headerView.backgroundColor = [UIColor colorWithRed:8/255.0 green:46/255.0 blue:46/255.0 alpha:0.8];
if (section == 0)
{
_headerView.backgroundColor = [UIColor whiteColor];
_bookImageView = [[UIImageView alloc] initWithFrame:CGRectMake((tableView.frame.size.width - 120)/2, 6, 120, 168)];
_bookImageView.contentMode = UIViewContentModeScaleAspectFit;
if (_book.wasNewImageAdded)
{
NSString * documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
UIImage * image = [self loadImageWithFileName:_book.bookImageID ofType:#"jpg" inDirectory:documentsDirectory];
_bookImageView.image = image;
}
else
{
_bookImageView.image = _book.largeBookImage;
}
if(_book.originalImageUsed)
{
NSString * documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
UIImage * image = [self loadImageWithFileName:_book.bookImageID ofType:#"jpg" inDirectory:documentsDirectory];
_bookImageView.image = image;
}
UITapGestureRecognizer *bookImageTouched = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(bookImageTapped:)];
bookImageTouched.numberOfTapsRequired = 1;
[_bookImageView addGestureRecognizer:bookImageTouched];
_bookImageView.userInteractionEnabled = YES;
[_headerView addSubview:_bookImageView];
}
I finally figured it out! It seems that I was confusing xcode with my property names. The code ended up much simpler in the end.
In didFinishPickingMediaWithInfo I created a UIImage and then set it to the bookImageView.image. Later, when I wanted to be able to update the image back to the original image, then I could call the bundle asset, _book.largeBookImage. Voila! The image was able to update immediately.
The most pertinent code is posted below.
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(nonnull NSDictionary<NSString *,id> *)info
{
[picker dismissViewControllerAnimated:YES completion:nil];
_chosenImage = [[UIImage alloc] init];
_chosenImage = [info objectForKey:UIImagePickerControllerOriginalImage];
_bookImageView.image = _chosenImage;
_book.wasNewImageAdded = YES;
_book.originalImageUsed = NO;
NSString * documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
[self saveImage:_chosenImage withFileName:_book.bookImageID ofType:#"jpg" inDirectory:documentsDirectory];
}
-(void)saveImage:(UIImage *)image withFileName:(NSString *)imageName ofType:(NSString *)extension inDirectory:(NSString *)directoryPath
{
if ([[extension lowercaseString] isEqualToString:#"png"])
{
[UIImagePNGRepresentation(image) writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.%#", imageName, #"png"]] options:NSAtomicWrite error:nil];
[self.tableView reloadData];
}
else if ([[extension lowercaseString] isEqualToString:#"jpg"] || [[extension lowercaseString] isEqualToString:#"jpeg"])
{
[UIImageJPEGRepresentation(image, 1.0) writeToFile:[directoryPath stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.%#", imageName, #"jpg"]] options:NSAtomicWrite error:nil];
[self.tableView reloadData];
}
else
{
//NSLog(#"Image Save Failed\nExtension: (%#) is not recognized, use (PNG/JPG)", extension);
}
}
-(void)restoreOriginalPhoto
{
_book.originalImageUsed = YES;
_book.wasNewImageAdded = NO;
_bookImageView.image = _book.largeBookImage;
_backgroundImage.image = _book.largeBookImage;
}
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
if (section == 0)
{
_bookImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 120, 168)];
_bookImageView.contentMode = UIViewContentModeScaleAspectFit;
_bookImageView.clipsToBounds = YES;
_bookImageView.layer.cornerRadius = 10.0f;
if (_book.wasNewImageAdded)
{
NSString * documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
UIImage * image = [self loadImageWithFileName:_book.bookImageID ofType:#"jpg" inDirectory:documentsDirectory];
_bookImageView.image = image;
}
else
{
_bookImageView.image = _book.largeBookImage;
}
if(_book.originalImageUsed)
{
_bookImageView.image = _book.largeBookImage;
}
}
}
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
if(_book.originalImageUsed)
{
_bookImageView.image = _book.largeBookImage;
}
[self.tableView reloadData];
[self.tableView setContentOffset:CGPointZero animated:NO];
}
I use UIImagePickerController to edit video and cut it,
I create it like this:
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
[imagePicker setVideoQuality:UIImagePickerControllerQualityType640x480];
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagePicker.mediaTypes = #[(__bridge NSString *)kUTTypeMovie, (__bridge NSString *)kUTTypeVideo, (__bridge NSString *)kUTTypeMPEG4];
imagePicker.allowsEditing = YES;
[self.navigationController presentViewController:imagePicker animated:YES completion:nil];
but unfortunately in delegate method that is called I cant get start and end editing time - to save edited video:
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {
[picker dismissViewControllerAnimated:YES completion:^{
}];
NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
if ([type isEqualToString:(NSString *)kUTTypeVideo] ||
[type isEqualToString:(NSString *)kUTTypeMovie]) { // movie != video
NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
NSNumber *start = [info objectForKey:#"_UIImagePickerControllerVideoEditingStart"];
NSNumber *end = [info objectForKey:#"_UIImagePickerControllerVideoEditingEnd"];
}
in my case start and end is nil. I have no idea how to get this information. Could you please advice how to get it?
Thank you in advance for any help.
I just check your code and run and i found that _UIImagePickerControllerVideoEditingStart and _UIImagePickerControllerVideoEditingEnd return only captured video from camera but if you are select video from your PhotoLibrary you did not get this two key in info dictionary:
If you are using imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; then you will get following info dictionary log:
UIImagePickerControllerMediaType = "public.movie";
UIImagePickerControllerMediaURL = "file:///private/var/mobile/Containers/Data/Application/BCBE6A30-1A92-41BB-8734-BFF052E416DE/tmp/trim.59737F15-FC2A-4EB7-89AE-DF3831089657.MOV";
UIImagePickerControllerReferenceURL = "assets-library://asset/asset.MOV?id=87E3E50A-1DBF-449F-8BE3-AB36E718D82C&ext=MOV";
If you are using imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; then you will get following info dictionary log:
UIImagePickerControllerMediaType = "public.movie";
UIImagePickerControllerMediaURL = "file:///private/var/mobile/Containers/Data/Application/611D33A4-61F4-4CD0-934D-C0EFF82B75AC/tmp/capture/capturedvideo.MOV";
"_UIImagePickerControllerVideoEditingEnd" = "2.360877976190476";
"_UIImagePickerControllerVideoEditingStart" = "1.360505952380952";
So at the end with UIImagePickerControllerSourceTypePhotoLibrary UIImagePickerController wont provide a _UIImagePickerControllerVideoEditingStart and _UIImagePickerControllerVideoEditingEnd key. so you can get its duration by using AVURLAsset like following code that assume start Time is 0 and end time is full duration.
AVURLAsset *Asset = [AVURLAsset assetWithURL:videoURL];
CMTime duration = [Asset duration];
int fullduration = ceil(duration.value/duration.timescale);
Default ImagePicker crop area is square (like image)
But I want to set it to be a rectangle, and I can get a rectangle image to use
Is there a easy way to set it?
I know GKImagePicker is very powerful but I don't know why image that below the crop area can't be scroll up.
thanks in advance
======edit for code=====
- (BOOL)startMediaBrowserFromViewController: (UIViewController*) controller
usingDelegate: (id<UIImagePickerControllerDelegate,UINavigationControllerDelegate>) delegate
type: (int)type_{
if (([UIImagePickerController isSourceTypeAvailable:
UIImagePickerControllerSourceTypeSavedPhotosAlbum] == NO)
|| (delegate == nil)
|| (controller == nil))
return NO;
UIImagePickerController *mediaUI = [[UIImagePickerController alloc] init];
mediaUI.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeImage, nil];
if (type_ == 0)
{
mediaUI.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
}
else
{
mediaUI.sourceType = UIImagePickerControllerSourceTypeCamera;
}
mediaUI.allowsEditing = YES;
mediaUI.delegate = delegate;
[controller presentModalViewController: mediaUI animated: NO];
return YES;
}
if I can get rectangle image, I can resize it in
- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info{
NSLog(#"imagePickerControllerDone");
UIImage *image = (UIImage *) [info objectForKey:
UIImagePickerControllerEditedImage];
CGSize size = image.size;
image = [ImageManager reSizeImage:image toSize:CGSizeMake(1000, 370)];
[self dismissViewControllerAnimated:YES completion:^{
self.carPhoto.image = image;
photoFlag = YES;
}];
}
I am using a custom tableview cell that displays text in chat bubbles and its working fine.
But i want to display images in chat.
For that i am doing belowed steps:
TO choose and upload file:
- (IBAction)btnAttachments:(id)sender{
self.imagePicker = [[UIImagePickerController alloc] init];
self.imagePicker.allowsEditing = NO;
self.imagePicker.delegate = self;
self.imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:self.imagePicker animated:YES completion:nil];}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
UIImage *imgChosen = info[UIImagePickerControllerOriginalImage];
imgChat = imgChosen;
[picker dismissViewControllerAnimated:YES completion:NULL];
// Upload new avatar to Content module
NSData *avatar = [[NSData alloc] initWithData:UIImagePNGRepresentation(imgChat)];
//
//[QBContent TUploadFile:avatar fileName:#"MyAvatar" contentType:#"image/png" isPublic:NO delegate:self];
[QBContent TUploadFile:avatar fileName:#"userChat" contentType:#"image/png" isPublic:YES delegate:self];}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
[picker dismissViewControllerAnimated:YES completion:NULL];
}
in Completed with result:
if(result.success && [result isKindOfClass:[QBCFileUploadTaskResult class]])
{
QBCFileUploadTaskResult *res = (QBCFileUploadTaskResult *)result;
NSUInteger uploadedFileID = res.uploadedBlob.ID;
QBChatMessage *message = [[QBChatMessage alloc] init];
message.recipientID = self.opponent.ID;
NSMutableDictionary *msgDict = [[NSMutableDictionary alloc]init];
[msgDict setValue:[NSNumber numberWithInt:uploadedFileID] forKey:#"fileID"];
message.customParameters = msgDict;
[[QBChat instance] sendMessage:message];
}
To download file:
- (void)chatDidReceiveMessageNotification:(NSNotification *)notification{
QBChatMessage *message = notification.userInfo[kMessage];
if(message.customParameters != nil)
{
NSUInteger fileID = [message.customParameters[#"fileID"] integerValue];
// download file by ID
[QBContent TDownloadFileWithBlobID:fileID delegate:self];
}
in completed with result:
if(result.success && [result isKindOfClass:[QBCFileDownloadTaskResult class]])
{
QBCFileDownloadTaskResult *res = (QBCFileDownloadTaskResult *)result;
if ([res file])
{
UIImageView* imageView = [[UIImageView alloc] initWithImage:
[UIImage imageWithData:[res file]]];
[self.messages addObject:imageView];
[self.tblObj reloadData];
}
}
Now, How to display that downloaded image in my chat?
Instruct me about the custom cell which will be used for displaying images.
Iam trying to capture video using front camera in ios and convert that into sequence of images I am trying to use avassetimagegenerator for that . Iam new to AV Foundation please help me in this , thanks .
First present an UIImagePickerController
- (void)presentVideoPicker {
UIImagePickerController *anImagePicker = [[UIImagePickerController alloc] init];
anImagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
anImagePicker.cameraDevice = UIImagePickerControllerCameraDeviceFront;
anImagePicker.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *)kUTTypeMovie, nil];
anImagePicker.allowsEditing = YES;
anImagePicker.delegate = self;
UIPopoverController *aPopoverController = [[[UIPopoverController alloc] initWithContentViewController:anImagePicker] autorelease];
[aPopoverController presentPopoverFromRect:self.view.frame inView:[[self view] window]
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
Capture the Video in UIImagePickerControllerDelegate
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString *aMediaType = [info objectForKey:UIImagePickerControllerMediaType];
if ([aMediaType isEqualToString:(NSString *)kUTTypeMovie]) {
NSURL *aVideoURL = [info objectForKey:UIImagePickerControllerMediaURL];
[self readMovie:aVideoURL];
// If you want the Duration fo the Video, Use this
AVPlayerItem *aPlayerItem = [AVPlayerItem playerItemWithURL:aVideoURL];
CMTime aDuration = aPlayerItem.duration;
float anInSeconds = CMTimeGetSeconds(aDuration);
NSInteger aDuration = nearbyintf(anInSeconds);
}
}
Now code for the Method you called in the Delegate - (void) readMovie:(NSURL *)url
Refer this link:
http://www.7twenty7.com/blog/2010/11/video-processing-with-av-foundation
...
Once you generate the CVImageBuffer for an Image,
Refer
how to convert a CVImageBufferRef to UIImage
to convert it to UIImage