I have used demo example of avcapture ,i wanna display image in imagview in viewcontroller after take photo i have use code
{
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
NSInteger numberOfAssets = [group numberOfAssets];
if (numberOfAssets > 0) {
NSInteger lastIndex = numberOfAssets-1;
[group enumerateAssetsAtIndexes:[NSIndexSet indexSetWithIndex:lastIndex] options:0 usingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) {
UIImage *thumbnail = [UIImage imageWithCGImage:[result thumbnail]];
if (thumbnail && thumbnail.size.width > 0) {
imagviewlastimage.image = thumbnail;
*stop = YES;
}
}];
}
} failureBlock:^(NSError *error) {
NSLog(#"error: %#", error);
}];
to get last image from photo library but i am gatting second last image
and to redirect viewController after pick image i have wrote in
captureManagerStillImageCaptured:(AVCamCaptureManager *)captureManager delegate
ViewController *temp=[[ViewController alloc]init];
temp.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentModalViewController:temp animated:YES];
use as this , how to resolve this ? ya pause screen after take photo
Related
I am working on an iPhone application. I have an option to select existing photos from Album. There should be an option for quick access for some images as it is in iMessage. Please check the attached screenshot for more information.
Any idea ?
I found the solution for my question:
First I am reading maximum 20 recent images from Photo Album using below code. Then I am adding all the images into UIScrollView. The last one is More. If user click on it, it will show iPhone default "UIImagePickerController" to choose other images.
If anybody found a better solution, please post it.
Code
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
[group setAssetsFilter:[ALAssetsFilter allPhotos]];
[group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *asset, NSUInteger index, BOOL *innerStop) {
if (asset) {
if ([self.stackForImages count] >= 20) {
// Stop the enumerations
*stop = YES;
*innerStop = YES;
[self initializeMedia];
} else {
ALAssetRepresentation *representation = [asset defaultRepresentation];
NSMutableDictionary *workingDictionary = [[NSMutableDictionary alloc] init];
[workingDictionary setObject:[asset valueForProperty:ALAssetPropertyType] forKey:UIImagePickerControllerMediaType];
[workingDictionary setObject:[UIImage imageWithCGImage:[asset thumbnail]] forKey:UIImagePickerControllerEditedImage];
[workingDictionary setObject:[UIImage imageWithCGImage:[representation fullScreenImage]] forKey:UIImagePickerControllerOriginalImage];
[workingDictionary setObject:[[asset valueForProperty:ALAssetPropertyURLs] valueForKey:[[[asset valueForProperty:ALAssetPropertyURLs] allKeys] objectAtIndex:0]] forKey:UIImagePickerControllerReferenceURL];
[self.stackForImages addObject:workingDictionary];
}
}
}];
if ([self.stackForImages count] > 0) {
[self initializeMedia];
}
} failureBlock: ^(NSError *error) {
}];
What is a fast way to load 10-20 fullscreen images from a camera roll, saved photos?
I'm using this code, but to load 10 photos I need to wait about 5-10 seconds. I'm using iPhone 4S.
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
if(_savedPhotos.count>=11) *stop = YES;
[group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *result, NSUInteger index, BOOL *needToStop) {
NSLog(#"%d",index);
if(_savedPhotos.count<11)
{
UIImage *image = [UIImage imageWithCGImage:result.defaultRepresentation.fullScreenImage];
[_savedPhotos addObject:image];
}
else
{
*needToStop = YES;
}
}];
} failureBlock:^(NSError *error) {
NSLog(#"%#",error.description);
}];
The ALAssetsLibrary library will run on a separate thread. So it may take time to communicate with the UI related and other stuff.
So use -performSelectorOnMainThread:withObject:waitUntilDone: inside the ALAssetsLibrary block.
Change your code as below
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
[group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *result, NSUInteger index, BOOL *needToStop) {
NSLog(#"%d",index);
UIImage *image = [UIImage imageWithCGImage:result.defaultRepresentation.fullScreenImage];
[self performSelectorOnMainThread:#selector(usePhotolibraryimage:) withObject:image waitUntilDone:NO];
}];
}
failureBlock:^(NSError *error) {
NSLog(#"%#",error.description);
}];
- (void)usePhotolibraryimage:(UiImage *)myImage{
//Do your all UI related and all stuff here
}
Note:Look on this issue too.
I want to get all of the pictures from photoLibrary. I would prefer a method or example that I can use directly.
//View Controller header(.h) file..
#import <UIKit/UIKit.h>
#include <AssetsLibrary/AssetsLibrary.h>
#interface getPhotoLibViewController : UIViewController
{
ALAssetsLibrary *library;
NSArray *imageArray;
NSMutableArray *mutableArray;
}
-(void)allPhotosCollected:(NSArray*)imgArray;
#end
//implementation file
declare global count variable as
static int count=0;
#implementation getPhotoLibViewController
-(void)getAllPictures
{
imageArray=[[NSArray alloc] init];
mutableArray =[[NSMutableArray alloc]init];
NSMutableArray* assetURLDictionaries = [[NSMutableArray alloc] init];
library = [[ALAssetsLibrary alloc] init];
void (^assetEnumerator)( ALAsset *, NSUInteger, BOOL *) = ^(ALAsset *result, NSUInteger index, BOOL *stop) {
if(result != nil) {
if([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]) {
[assetURLDictionaries addObject:[result valueForProperty:ALAssetPropertyURLs]];
NSURL *url= (NSURL*) [[result defaultRepresentation]url];
[library assetForURL:url
resultBlock:^(ALAsset *asset) {
[mutableArray addObject:[UIImage imageWithCGImage:[[asset defaultRepresentation] fullScreenImage]]];
if ([mutableArray count]==count)
{
imageArray=[[NSArray alloc] initWithArray:mutableArray];
[self allPhotosCollected:imageArray];
}
}
failureBlock:^(NSError *error){ NSLog(#"operation was not successfull!"); } ];
}
}
};
NSMutableArray *assetGroups = [[NSMutableArray alloc] init];
void (^ assetGroupEnumerator) ( ALAssetsGroup *, BOOL *)= ^(ALAssetsGroup *group, BOOL *stop) {
if(group != nil) {
[group enumerateAssetsUsingBlock:assetEnumerator];
[assetGroups addObject:group];
count=[group numberOfAssets];
}
};
assetGroups = [[NSMutableArray alloc] init];
[library enumerateGroupsWithTypes:ALAssetsGroupAll
usingBlock:assetGroupEnumerator
failureBlock:^(NSError *error) {NSLog(#"There is an error");}];
}
-(void)allPhotosCollected:(NSArray*)imgArray
{
//write your code here after getting all the photos from library...
NSLog(#"all pictures are %#",imgArray);
}
#end
Use getAllPicture method to get photos from photo library.
OR You can have a look at this blog http://mutiselectimagepicker.blogspot.in/2014/08/imageselect-to-allow-multiple-selection.html
Since ALAssetsLibrary is deprecated now and Photo Framework is new one. I made my own function in Objective C to get all photos from Camera Roll and store in NSArray and displayed in my Collectionview
NSArray *imageArray;
NSMutableArray *mutableArray;
-(void)getAllPhotosFromCamera
{
imageArray=[[NSArray alloc] init];
mutableArray =[[NSMutableArray alloc]init];
PHImageRequestOptions *requestOptions = [[PHImageRequestOptions alloc] init];
requestOptions.resizeMode = PHImageRequestOptionsResizeModeExact;
requestOptions.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
requestOptions.synchronous = true;
PHFetchResult *result = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:nil];
NSLog(#"%d",(int)result.count);
PHImageManager *manager = [PHImageManager defaultManager];
NSMutableArray *images = [NSMutableArray arrayWithCapacity:[result count]];
// assets contains PHAsset objects.
__block UIImage *ima;
for (PHAsset *asset in result) {
// Do something with the asset
[manager requestImageForAsset:asset
targetSize:PHImageManagerMaximumSize
contentMode:PHImageContentModeDefault
options:requestOptions
resultHandler:^void(UIImage *image, NSDictionary *info) {
ima = image;
[images addObject:ima];
}];
}
imageArray = [images copy]; // You can direct use NSMutuable Array images
}
-(void)getFromGallery:(BOOL )IsImages
{
if(self.csCollectionsArray != nil)
[self.csCollectionsArray removeAllObjects];
__block NSMutableDictionary *date = [[NSMutableDictionary alloc] init];
ALAssetsLibrary *csAssetsLibrary = [[ALAssetsLibrary alloc] init];
NSUInteger groupTypes = ALAssetsGroupAlbum | ALAssetsGroupEvent | ALAssetsGroupFaces | ALAssetsGroupSavedPhotos;
[csAssetsLibrary enumerateGroupsWithTypes:groupTypes usingBlock:^(ALAssetsGroup *group, BOOL *stop)
{
if([group numberOfAssets] > 0)
{
if(IsImages)
[group setAssetsFilter:[ALAssetsFilter allPhotos]];
else
[group setAssetsFilter:[ALAssetsFilter allVideos]];
[group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *asset, NSUInteger index, BOOL *stop)
{
if(asset)
{ //1.fetching all assets from device library
//2.Add all fetched assests from library
[date setObject:asset forKey:[asset valueForProperty:ALAssetPropertyDate]];
}
}];
}
else
{ NSLog(#"---> load table -------->");
if(date != nil && date.count > 0)
{ //3.Sort using date by ascending order and moved to dictionary to array
NSArray *sortedKeys = [[date allKeys] sortedArrayUsingSelector: #selector(compare:)];
for (NSString *key in sortedKeys)
[self.csCollectionsArray addObject: [date objectForKey:key]];
//4.Load images into collection view after fetching all datas
[self reloadCollectionView];
if(self.csCollectionView != nil)
[self.csCollectionView scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:([self.csCollectionsArray count] - 1) inSection:0] atScrollPosition:UICollectionViewScrollPositionBottom animated:YES];
}
date = nil;
}
}failureBlock:^(NSError *error)
{
if((csCollectionsArray == nil || [csCollectionsArray count] == 0))
{
ALAuthorizationStatus status = [ALAssetsLibrary authorizationStatus]; if(status != ALAuthorizationStatusAuthorized)
{
[self showAlertAndCloseUploaderView:#"You can just go to \"Settings\" app (General -> Reset -> Reset Location & Privacy) then come again and click ok when the alert dialog is showing for enable the permission to access the photo library"];
}
}
}];
}
You can use this below method to fetch all images or videos from assets library in ios.
Use this assetslibrary framework(must)
NOTE:- #import
-(void)getFromGallery:(BOOL )IsImages
{
if(self.csCollectionsArray != nil)
[self.csCollectionsArray removeAllObjects];
__block NSMutableDictionary *date = [[NSMutableDictionary alloc] init];
ALAssetsLibrary *csAssetsLibrary = [[ALAssetsLibrary alloc] init];
NSUInteger groupTypes = ALAssetsGroupAlbum | ALAssetsGroupEvent | ALAssetsGroupFaces | ALAssetsGroupSavedPhotos;
[csAssetsLibrary enumerateGroupsWithTypes:groupTypes usingBlock:^(ALAssetsGroup *group, BOOL *stop)
{
if([group numberOfAssets] > 0)
{
if(IsImages)
[group setAssetsFilter:[ALAssetsFilter allPhotos]];
else
[group setAssetsFilter:[ALAssetsFilter allVideos]];
[group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *asset, NSUInteger index, BOOL *stop)
{
if(asset)
{ //1.fetching all assets from device library
//2.Add all fetched assests from library
[date setObject:asset forKey:[asset valueForProperty:ALAssetPropertyDate]];
}
}];
}
else
{ NSLog(#"---> load table -------->");
if(date != nil && date.count > 0)
{ //3.Sort using date by ascending order and moved to dictionary to array
NSArray *sortedKeys = [[date allKeys] sortedArrayUsingSelector: #selector(compare:)];
for (NSString *key in sortedKeys)
[self.csCollectionsArray addObject: [date objectForKey:key]];
//4.Load images into collection view after fetching all datas
[self reloadCollectionView];
if(self.csCollectionView != nil)
[self.csCollectionView scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:([self.csCollectionsArray count] - 1) inSection:0] atScrollPosition:UICollectionViewScrollPositionBottom animated:YES];
}
date = nil;
}
}failureBlock:^(NSError *error)
{
if((csCollectionsArray == nil || [csCollectionsArray count] == 0))
{
ALAuthorizationStatus status = [ALAssetsLibrary authorizationStatus]; if(status != ALAuthorizationStatusAuthorized)
{
[self showAlertAndCloseUploaderView:#"You can just go to \"Settings\" app (General -> Reset -> Reset Location & Privacy) then come again and click ok when the alert dialog is showing for enable the permission to access the photo library"];
}
}
}];
}
i want to get the count of photos in photoLibrary. Currently, i'am able to get the photoes from photoLibrary and add to myApp's Document directry ONE BY ONE. But what i want is, save all the photos from photoLibrary to Document directry of myApp ALL AT ONCE. Thats why i need the count of photoes in photoLibrary. I've used UIImagePickerControllerSourceTypePhotoLibrary to retrieve the photoes from iPhone photoLibrary.
Any help would be appreaciated..
thanks in advance....
Use ALAssetsLibrary for this:
int imgCount = 0;
self.assetsLibrary = [[ALAssetsLibrary alloc] init];
dispatch_queue_t dispatchQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(dispatchQueue, ^(void) {
[self.assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
[group enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index,
__block BOOL foundThePhoto = NO;
if (foundThePhoto){ *stop = YES;
}
BOOL *stop) {
/* Get the asset type */
NSString *assetType = [result valueForProperty:ALAssetPropertyType];
if ([assetType isEqualToString:ALAssetTypePhoto]){ NSLog(#"This is a photo asset");
foundThePhoto = YES; *stop = YES;
/* Get the asset's representation object */
ALAssetRepresentation *assetRepresentation = [result defaultRepresentation];
/* We need the scale and orientation to be able to construct a properly oriented and scaled UIImage out of the representation object */
CGFloat imageScale = [assetRepresentation scale];
UIImageOrientation imageOrientation = (UIImageOrientation)[assetRepresentation orientation];
dispatch_async(dispatch_get_main_queue(), ^(void) {
CGImageRef imageReference = [assetRepresentation fullResolutionImage];
/* Construct the image now */
UIImage *image = [[UIImage alloc] initWithCGImage:imageReference
scale:imageScale orientation:imageOrientation];
//Write image to doument directory
imgCount ++;
}
});
} failureBlock:^(NSError *error) {
} }];
NSLog(#"Failed to enumerate the asset groups."); }];
})
NSLog(#"Total Image Count %d",imgCount);
The code block below counts all videos and photos:
__block int videoCount = 0;
__block int photoCount = 0;
ALAssetsLibrary *assetLibrary = [[ALAssetsLibrary alloc]init];
[assetLibrary
enumerateGroupsWithTypes:ALAssetsGroupAll
usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
if (group == nil) {
// enumeration complete
return;
}
int total = group.numberOfAssets;
[group setAssetsFilter:[ALAssetsFilter allVideos]];
int groupVideoCount = group.numberOfAssets;
videoCount += groupVideoCount;
photoCount += total - groupVideoCount;
}
failureBlock:^(NSError *error) {
// Handle error
}];
I am trying fetch the picture which is captured by the camera in the iPhone, programmatically. Now, the issue is I am using AVCaptureInput, and other AVFoundation headers and accessing the camera of iPhone instead of simple UIImagePickerViewController because, the program needs a small view inside the main view showing the camera footage. So Now, the issue is I need to fetch the last image I captured. It is being stored in camera roll folder inside library. I need to show it as a preview of last image captured - exactly as how the iPhone's camera does.
You can use the AssetsLibrary framework to access photos in the camera roll.
Something like this should work for getting the last image as a thumbnail:
- (void)updateLastPhotoThumbnail
{
[assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
NSInteger numberOfAssets = [group numberOfAssets];
if (numberOfAssets > 0) {
NSInteger lastIndex = numberOfAssets - 1;
[group enumerateAssetsAtIndexes:[NSIndexSet indexSetWithIndex:lastIndex] options:0 usingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) {
UIImage *thumbnail = [UIImage imageWithCGImage:[result thumbnail]];
if (thumbnail && thumbnail.size.width > 0) {
photoThumbnailView.image = thumbnail;
*stop = YES;
}
}];
}
} failureBlock:^(NSError *error) {
NSLog(#"error: %#", error);
}];
}
This is assuming that you have assetsLibrary initialized as an instance variable. You can then also observe the notification that is posted when the library changes (could also happen outside of your app):
assetsLibrary = [[ALAssetsLibrary alloc] init];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(updateLastPhotoThumbnail) name:ALAssetsLibraryChangedNotification object:nil];
For some reasons above answer is not working for me.
I got it working by using this code.
galleryButton is an instance variable for a uibutton.
- (void)createGalleryButton
{
NSMutableArray *assets = [[NSMutableArray alloc] init];
void (^assetEnumerator)(ALAsset *, NSUInteger, BOOL *) = ^(ALAsset *result, NSUInteger
index, BOOL *stop) {
if(result != nil) {
UIImage *thumbnail = [UIImage imageWithCGImage:[result thumbnail]];
[assets addObject:thumbnail];
}
};
void (^assetGroupEnumerator)(ALAssetsGroup *, BOOL *) = ^(ALAssetsGroup *group, BOOL *stop) {
if(group != nil) {
[group setAssetsFilter:[ALAssetsFilter allPhotos]];
[group enumerateAssetsUsingBlock:assetEnumerator];
}
if(assets.count!=0)
{
UIImage *lastImage = (UIImage *)[assets lastObject];
[self.galleryButton setImage:lastImage forState:UIControlStateNormal];
}
else
{
[self.galleryButton setImage:[UIImage imageNamed:#"camera.bundle/camera-library.png"] forState:UIControlStateNormal];
}
};
[self.assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupAll
usingBlock:assetGroupEnumerator
failureBlock: ^(NSError *error) {
NSLog(#"Failure");
}];
}
to use it
self.galleryButton = [UIButton buttonWithType:UIButtonTypeCustom];
[self.galleryButton setFrame:CGRectMake(260, self.view.frame.size.height - 60, 50, 50)];
[self.galleryButton setImage:[UIImage imageNamed:#"camera.bundle/camera-library.png"] forState:UIControlStateNormal];
// assetsLibrary will take time getting all your images at this point. So performItWithDelay
[self performSelector:#selector(createGalleryButton) withObject:nil afterDelay:0.1];
[self.galleryButton addTarget:self action:#selector(showGallery:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:self.galleryButton];