417 lines
18 KiB
Mathematica
417 lines
18 KiB
Mathematica
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//
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// GMAlbumsViewController.m
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// GMPhotoPicker
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//
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// Created by Guillermo Muntaner Perelló on 19/09/14.
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// Copyright (c) 2014 Guillermo Muntaner Perelló. All rights reserved.
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//
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#import "GMImagePickerController.h"
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#import "GMAlbumsViewController.h"
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#import "GMGridViewCell.h"
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#import "GMGridViewController.h"
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#import "GMAlbumsViewCell.h"
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#include <Photos/Photos.h>
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@interface GMAlbumsViewController() <PHPhotoLibraryChangeObserver>
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@property (strong,nonatomic) NSArray *collectionsFetchResults;
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@property (strong,nonatomic) NSArray *collectionsLocalizedTitles;
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@property (strong,nonatomic) NSArray *collectionsFetchResultsAssets;
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@property (strong,nonatomic) NSArray *collectionsFetchResultsTitles;
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@property (nonatomic, weak) GMImagePickerController *picker;
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@property (strong,nonatomic) PHCachingImageManager *imageManager;
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@end
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@implementation GMAlbumsViewController
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- (id)init
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{
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if (self = [super initWithStyle:UITableViewStylePlain]) {
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self.preferredContentSize = kPopoverContentSize;
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}
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return self;
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}
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static NSString *const AllPhotosReuseIdentifier = @"AllPhotosCell";
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static NSString *const CollectionCellReuseIdentifier = @"CollectionCell";
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- (void)viewDidLoad
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{
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[super viewDidLoad];
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self.view.backgroundColor = [self.picker pickerBackgroundColor];
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// Navigation bar customization
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if (self.picker.customNavigationBarPrompt) {
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self.navigationItem.prompt = self.picker.customNavigationBarPrompt;
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}
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self.imageManager = [[PHCachingImageManager alloc] init];
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// Table view aspect
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self.tableView.rowHeight = kAlbumRowHeight;
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self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
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// Buttons
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NSDictionary *barButtonItemAttributes = @{NSFontAttributeName: [UIFont fontWithName:self.picker.pickerFontName size:self.picker.pickerFontHeaderSize]};
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NSString *cancelTitle = self.picker.customCancelButtonTitle ? self.picker.customCancelButtonTitle : NSLocalizedStringFromTableInBundle(@"picker.navigation.cancel-button", @"GMImagePicker", [NSBundle bundleForClass:GMImagePickerController.class], @"Cancel");
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self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:cancelTitle
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style:UIBarButtonItemStylePlain
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target:self.picker
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action:@selector(dismiss:)];
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if (self.picker.useCustomFontForNavigationBar) {
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[self.navigationItem.leftBarButtonItem setTitleTextAttributes:barButtonItemAttributes forState:UIControlStateNormal];
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[self.navigationItem.leftBarButtonItem setTitleTextAttributes:barButtonItemAttributes forState:UIControlStateSelected];
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}
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if (self.picker.allowsMultipleSelection) {
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NSString *doneTitle = self.picker.customDoneButtonTitle ? self.picker.customDoneButtonTitle : NSLocalizedStringFromTableInBundle(@"picker.navigation.done-button", @"GMImagePicker", [NSBundle bundleForClass:GMImagePickerController.class], @"Done");
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self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:doneTitle
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style:UIBarButtonItemStyleDone
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target:self.picker
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action:@selector(finishPickingAssets:)];
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if (self.picker.useCustomFontForNavigationBar) {
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[self.navigationItem.rightBarButtonItem setTitleTextAttributes:barButtonItemAttributes forState:UIControlStateNormal];
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[self.navigationItem.rightBarButtonItem setTitleTextAttributes:barButtonItemAttributes forState:UIControlStateSelected];
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}
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self.navigationItem.rightBarButtonItem.enabled = (self.picker.autoDisableDoneButton ? self.picker.selectedAssets.count > 0 : TRUE);
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}
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// Bottom toolbar
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self.toolbarItems = self.picker.toolbarItems;
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// Title
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if (!self.picker.title) {
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self.title = NSLocalizedStringFromTableInBundle(@"picker.navigation.title", @"GMImagePicker", [NSBundle bundleForClass:GMImagePickerController.class], @"Navigation bar default title");
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} else {
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self.title = self.picker.title;
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}
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// Fetch PHAssetCollections:
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PHFetchResult *topLevelUserCollections = [PHCollectionList fetchTopLevelUserCollectionsWithOptions:nil];
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PHFetchResult *smartAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];
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self.collectionsFetchResults = @[topLevelUserCollections, smartAlbums];
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self.collectionsLocalizedTitles = @[NSLocalizedStringFromTableInBundle(@"picker.table.smart-albums-header", @"GMImagePicker", [NSBundle bundleForClass:GMImagePickerController.class], @"Smart Albums"),NSLocalizedStringFromTableInBundle(@"picker.table.user-albums-header", @"GMImagePicker", [NSBundle bundleForClass:GMImagePickerController.class], @"Albums")];
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[self updateFetchResults];
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// Register for changes
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[[PHPhotoLibrary sharedPhotoLibrary] registerChangeObserver:self];
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if ([self respondsToSelector:@selector(setEdgesForExtendedLayout:)])
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{
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self.edgesForExtendedLayout = UIRectEdgeNone;
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}
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}
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- (void)dealloc
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{
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[[PHPhotoLibrary sharedPhotoLibrary] unregisterChangeObserver:self];
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}
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- (UIStatusBarStyle)preferredStatusBarStyle {
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return self.picker.pickerStatusBarStyle;
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}
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- (void)selectAllAlbumsCell {
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NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
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[self tableView:self.tableView didSelectRowAtIndexPath:indexPath];
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}
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-(void)updateFetchResults
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{
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//What I do here is fetch both the albums list and the assets of each album.
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//This way I have acces to the number of items in each album, I can load the 3
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//thumbnails directly and I can pass the fetched result to the gridViewController.
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self.collectionsFetchResultsAssets=nil;
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self.collectionsFetchResultsTitles=nil;
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//Fetch PHAssetCollections:
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PHFetchResult *topLevelUserCollections = [self.collectionsFetchResults objectAtIndex:0];
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PHFetchResult *smartAlbums = [self.collectionsFetchResults objectAtIndex:1];
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//All album: Sorted by descending creation date.
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NSMutableArray *allFetchResultArray = [[NSMutableArray alloc] init];
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NSMutableArray *allFetchResultLabel = [[NSMutableArray alloc] init];
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{
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PHFetchOptions *options = [[PHFetchOptions alloc] init];
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options.predicate = [NSPredicate predicateWithFormat:@"mediaType in %@", self.picker.mediaTypes];
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options.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:NO]];
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PHFetchResult *assetsFetchResult = [PHAsset fetchAssetsWithOptions:options];
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[allFetchResultArray addObject:assetsFetchResult];
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[allFetchResultLabel addObject:NSLocalizedStringFromTableInBundle(@"picker.table.all-photos-label", @"GMImagePicker", [NSBundle bundleForClass:GMImagePickerController.class], @"All photos")];
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}
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//User albums:
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NSMutableArray *userFetchResultArray = [[NSMutableArray alloc] init];
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NSMutableArray *userFetchResultLabel = [[NSMutableArray alloc] init];
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for(PHCollection *collection in topLevelUserCollections)
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{
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if ([collection isKindOfClass:[PHAssetCollection class]])
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{
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PHFetchOptions *options = [[PHFetchOptions alloc] init];
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options.predicate = [NSPredicate predicateWithFormat:@"mediaType in %@", self.picker.mediaTypes];
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PHAssetCollection *assetCollection = (PHAssetCollection *)collection;
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//Albums collections are allways PHAssetCollectionType=1 & PHAssetCollectionSubtype=2
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PHFetchResult *assetsFetchResult = [PHAsset fetchAssetsInAssetCollection:assetCollection options:options];
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[userFetchResultArray addObject:assetsFetchResult];
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[userFetchResultLabel addObject:collection.localizedTitle];
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}
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}
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//Smart albums: Sorted by descending creation date.
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NSMutableArray *smartFetchResultArray = [[NSMutableArray alloc] init];
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NSMutableArray *smartFetchResultLabel = [[NSMutableArray alloc] init];
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for(PHCollection *collection in smartAlbums)
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{
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if ([collection isKindOfClass:[PHAssetCollection class]])
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{
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PHAssetCollection *assetCollection = (PHAssetCollection *)collection;
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//Smart collections are PHAssetCollectionType=2;
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if(self.picker.customSmartCollections && [self.picker.customSmartCollections containsObject:@(assetCollection.assetCollectionSubtype)])
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{
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PHFetchOptions *options = [[PHFetchOptions alloc] init];
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options.predicate = [NSPredicate predicateWithFormat:@"mediaType in %@", self.picker.mediaTypes];
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options.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:NO]];
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PHFetchResult *assetsFetchResult = [PHAsset fetchAssetsInAssetCollection:assetCollection options:options];
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if(assetsFetchResult.count>0)
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{
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[smartFetchResultArray addObject:assetsFetchResult];
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[smartFetchResultLabel addObject:collection.localizedTitle];
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}
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}
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}
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}
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self.collectionsFetchResultsAssets= @[allFetchResultArray,smartFetchResultArray,userFetchResultArray];
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self.collectionsFetchResultsTitles= @[allFetchResultLabel,smartFetchResultLabel,userFetchResultLabel];
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}
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#pragma mark - Accessors
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- (GMImagePickerController *)picker
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{
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return (GMImagePickerController *)self.navigationController.parentViewController;
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}
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#pragma mark - Rotation
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- (BOOL)shouldAutorotate
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{
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return YES;
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}
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- (UIInterfaceOrientationMask)supportedInterfaceOrientations
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{
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return UIInterfaceOrientationMaskAllButUpsideDown;
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}
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#pragma mark - UITableViewDataSource
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- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
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{
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return (NSInteger)self.collectionsFetchResultsAssets.count;
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}
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- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
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{
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PHFetchResult *fetchResult = self.collectionsFetchResultsAssets[(NSUInteger)section];
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return (NSInteger)fetchResult.count;
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}
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- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
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{
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static NSString *CellIdentifier = @"Cell";
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GMAlbumsViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
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if (cell == nil) {
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cell = [[GMAlbumsViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
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cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
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}
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// Increment the cell's tag
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NSInteger currentTag = cell.tag + 1;
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cell.tag = currentTag;
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// Set the label
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cell.textLabel.font = [UIFont fontWithName:self.picker.pickerFontName size:self.picker.pickerFontHeaderSize];
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cell.textLabel.text = (self.collectionsFetchResultsTitles[(NSUInteger)indexPath.section])[(NSUInteger)indexPath.row];
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cell.textLabel.textColor = self.picker.pickerTextColor;
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// Retrieve the pre-fetched assets for this album:
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PHFetchResult *assetsFetchResult = (self.collectionsFetchResultsAssets[(NSUInteger)indexPath.section])[(NSUInteger)indexPath.row];
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// Display the number of assets
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if (self.picker.displayAlbumsNumberOfAssets) {
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cell.detailTextLabel.font = [UIFont fontWithName:self.picker.pickerFontName size:self.picker.pickerFontNormalSize];
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cell.detailTextLabel.text = [self tableCellSubtitle:assetsFetchResult];
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cell.detailTextLabel.textColor = self.picker.pickerTextColor;
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}
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// Set the 3 images (if exists):
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if ([assetsFetchResult count] > 0) {
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CGFloat scale = [UIScreen mainScreen].scale;
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//Compute the thumbnail pixel size:
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CGSize tableCellThumbnailSize1 = CGSizeMake(kAlbumThumbnailSize1.width*scale, kAlbumThumbnailSize1.height*scale);
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PHAsset *asset = assetsFetchResult[0];
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[cell setVideoLayout:(asset.mediaType==PHAssetMediaTypeVideo)];
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[self.imageManager requestImageForAsset:asset
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targetSize:tableCellThumbnailSize1
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contentMode:PHImageContentModeAspectFill
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options:nil
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resultHandler:^(UIImage *result, NSDictionary *info) {
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if (cell.tag == currentTag) {
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cell.imageView1.image = result;
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}
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}];
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// Second & third images:
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// TODO: Only preload the 3pixels height visible frame!
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if ([assetsFetchResult count] > 1) {
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//Compute the thumbnail pixel size:
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CGSize tableCellThumbnailSize2 = CGSizeMake(kAlbumThumbnailSize2.width*scale, kAlbumThumbnailSize2.height*scale);
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PHAsset *asset = assetsFetchResult[1];
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[self.imageManager requestImageForAsset:asset
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targetSize:tableCellThumbnailSize2
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contentMode:PHImageContentModeAspectFill
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options:nil
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resultHandler:^(UIImage *result, NSDictionary *info) {
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if (cell.tag == currentTag) {
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cell.imageView2.image = result;
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}
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}];
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} else {
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cell.imageView2.image = nil;
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}
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if ([assetsFetchResult count] > 2) {
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CGSize tableCellThumbnailSize3 = CGSizeMake(kAlbumThumbnailSize3.width*scale, kAlbumThumbnailSize3.height*scale);
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PHAsset *asset = assetsFetchResult[2];
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[self.imageManager requestImageForAsset:asset
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targetSize:tableCellThumbnailSize3
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contentMode:PHImageContentModeAspectFill
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options:nil
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resultHandler:^(UIImage *result, NSDictionary *info) {
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if (cell.tag == currentTag) {
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cell.imageView3.image = result;
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}
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}];
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} else {
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cell.imageView3.image = nil;
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}
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} else {
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[cell setVideoLayout:NO];
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cell.imageView3.image = [UIImage imageNamed:@"GMEmptyFolder"];
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cell.imageView2.image = [UIImage imageNamed:@"GMEmptyFolder"];
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cell.imageView1.image = [UIImage imageNamed:@"GMEmptyFolder"];
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}
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return cell;
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}
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#pragma mark - UITableViewDelegate
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- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
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{
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UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
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// Init the GMGridViewController
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GMGridViewController *gridViewController = [[GMGridViewController alloc] initWithPicker:[self picker]];
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// Set the title
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gridViewController.title = cell.textLabel.text;
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// Use the prefetched assets!
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gridViewController.assetsFetchResults = [[_collectionsFetchResultsAssets objectAtIndex:(NSUInteger)indexPath.section] objectAtIndex:(NSUInteger)indexPath.row];
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// Remove selection so it looks better on slide in
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[tableView deselectRowAtIndexPath:indexPath animated:true];
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// Push GMGridViewController
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[self.navigationController pushViewController:gridViewController animated:YES];
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}
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|
||
|
|
-(void)tableView:(UITableView *)tableView willDisplayHeaderView:(UIView *)view forSection:(NSInteger)section
|
||
|
|
{
|
||
|
|
UITableViewHeaderFooterView *header = (UITableViewHeaderFooterView *)view;
|
||
|
|
// header.contentView.backgroundColor = [UIColor clearColor];
|
||
|
|
// header.backgroundView.backgroundColor = [UIColor clearColor];
|
||
|
|
|
||
|
|
// Default is a bold font, but keep this styled as a normal font
|
||
|
|
header.textLabel.font = [UIFont fontWithName:self.picker.pickerFontName size:self.picker.pickerFontNormalSize];
|
||
|
|
header.textLabel.textColor = self.picker.pickerTextColor;
|
||
|
|
}
|
||
|
|
|
||
|
|
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
|
||
|
|
{
|
||
|
|
//Tip: Returning nil hides the section header!
|
||
|
|
|
||
|
|
NSString *title = nil;
|
||
|
|
if (section > 0) {
|
||
|
|
// Only show title for non-empty sections:
|
||
|
|
PHFetchResult *fetchResult = self.collectionsFetchResultsAssets[(NSUInteger)section];
|
||
|
|
if (fetchResult.count > 0) {
|
||
|
|
title = self.collectionsLocalizedTitles[(NSUInteger)(section - 1)];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return title;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#pragma mark - PHPhotoLibraryChangeObserver
|
||
|
|
|
||
|
|
- (void)photoLibraryDidChange:(PHChange *)changeInstance
|
||
|
|
{
|
||
|
|
// Call might come on any background queue. Re-dispatch to the main queue to handle it.
|
||
|
|
dispatch_async(dispatch_get_main_queue(), ^{
|
||
|
|
|
||
|
|
NSMutableArray *updatedCollectionsFetchResults = nil;
|
||
|
|
|
||
|
|
for (PHFetchResult *collectionsFetchResult in self.collectionsFetchResults) {
|
||
|
|
PHFetchResultChangeDetails *changeDetails = [changeInstance changeDetailsForFetchResult:collectionsFetchResult];
|
||
|
|
if (changeDetails) {
|
||
|
|
if (!updatedCollectionsFetchResults) {
|
||
|
|
updatedCollectionsFetchResults = [self.collectionsFetchResults mutableCopy];
|
||
|
|
}
|
||
|
|
[updatedCollectionsFetchResults replaceObjectAtIndex:[self.collectionsFetchResults indexOfObject:collectionsFetchResult] withObject:[changeDetails fetchResultAfterChanges]];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// This only affects to changes in albums level (add/remove/edit album)
|
||
|
|
if (updatedCollectionsFetchResults) {
|
||
|
|
self.collectionsFetchResults = updatedCollectionsFetchResults;
|
||
|
|
}
|
||
|
|
|
||
|
|
// However, we want to update if photos are added, so the counts of items & thumbnails are updated too.
|
||
|
|
// Maybe some checks could be done here , but for now is OKey.
|
||
|
|
[self updateFetchResults];
|
||
|
|
[self.tableView reloadData];
|
||
|
|
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
#pragma mark - Cell Subtitle
|
||
|
|
|
||
|
|
- (NSString *)tableCellSubtitle:(PHFetchResult*)assetsFetchResult
|
||
|
|
{
|
||
|
|
// Just return the number of assets. Album app does this:
|
||
|
|
return [NSString stringWithFormat:@"%ld", (long)[assetsFetchResult count]];
|
||
|
|
}
|
||
|
|
|
||
|
|
@end
|