Introducing the Photos Frameworks
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- Moses Clark
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1 Media #WWDC14 Introducing the Photos Frameworks Session 511 Adam Swift ios Photos Frameworks 2014 Apple Inc. All rights reserved. Redistribution or public display not permitted without written permission from Apple.
2 Introducing PhotoKit Photos Access photos and videos from photo library Create a full-featured app like built-in Photos app Photos UI Photo editing app extensions
3 What You Will Learn Photos framework Fetch and manipulate photo library model data Handle external changes Retrieve and edit photo/video content PhotosUI Framework How to build photo/video editing extensions
4 Photos Framework
5 Introducing the Photos Framework New Objective-C framework on ios First-class citizen Custom image picker Full-featured photo library browser and editor
6 Introducing the Photos Framework New Objective-C framework on ios Make First-class your citizen app a first-class citizen of user s Photo Library Custom image picker Custom image picker Full-featured photo library Full browser featured and photo editor Used by built-in Photos and Camera app Intended to supersede ALAssetsLibrary
7 What Does It Provide? Access photo and video assets, albums, and moments Add, remove, modify assets and albums Edit photo/video content and metadata
8 Photos API Overview Model data Fetch model objects Change model data Handle model changes Image and video content Retrieve image/video content Edit content
9 Model Data
10 Model Objects Represent the structure of your library Photo and video assets, moments, albums, folders, etc. Read-only Thread-safe
11 Model Objects
12 Model Objects Assets
13 Model Objects Assets
14 Model Objects Assets
15 Model Objects Assets
16 Model Objects Asset Collections Assets
17 Model Objects Asset Collections Assets
18 Model Objects Asset Collections Assets
19 Model Objects Asset Collections Assets
20 Model Objects Collection Lists Asset Collections Assets
21 Model Objects Collection Lists Asset Collections Assets
22 Model Objects Collection Lists Asset Collections Assets
23 Assets Photos and videos
24 Assets Photos and videos PHAsset Media type Creation date Location Favorite
25 Asset Collection Ordered collection of assets Albums, moments, and smart albums
26 Asset Collection Ordered collection of assets Albums, moments, and smart albums PHAssetCollection Type Title Start and end date
27 Collection List Ordered collection of collections Both asset collections and collection lists Folder, moment year
28 Collection List Ordered collection of collections Both asset collections and collection lists Folder, moment year PHCollectionList Type Title Start and end date
29 Fetching Model Objects Fetch via class methods on model object Fetch all video assets [PHAsset fetchassetswithmediatype:phassetmediatypevideo options:nil]
30 Fetching Model Objects Fetch via class methods on model object Fetch all video assets [PHAsset fetchassetswithmediatype:phassetmediatypevideo options:nil] Fetch all moments [PHAssetCollection fetchmomentswithoptions:nil]
31 Fetching Model Objects Fetch via class methods on model object Fetch all video assets [PHAsset fetchassetswithmediatype:phassetmediatypevideo options:nil] Fetch all moments [PHAssetCollection fetchmomentswithoptions:nil] Use options to filter and sort
32 Fetching Collection Contents Collections do not cache their contents Fetch contents via class methods
33 Fetching Collection Contents Collections do not cache their contents Fetch contents via class methods Fetch assets in an asset collection [PHAsset fetchassetsinassetcollection:myalbum options:nil]
34 Transient Collections Runtime-only transient collection Search results, user selection
35 Transient Collections Runtime-only transient collection Search results, user selection Interchangeable with regular collections Fetch contents Reuse your view controllers, etc.
36 Transient Collections Create a transient asset collection [PHAssetCollection transientassetcollectionwithassets:assets title:title]
37 Fetch Results Want synchronous, fast results Results of a fetch can be very large Don t need all objects in memory at once Work in batches
38 Fetch Results Results returned in a PHFetchResult Tracks IDs of the full result set Vends fully realized objects Similar API to NSArray
39 Fetch Results Results returned in a PHFetchResult Tracks IDs of the full result set Vends fully realized objects Similar API to NSArray Fetch result
40 Fetch Results Results returned in a PHFetchResult Tracks IDs of the full result set Vends fully realized objects Similar API to NSArray Fetch result assets[n]
41 Fetch Results Results returned in a PHFetchResult Tracks IDs of the full result set Vends fully realized objects Similar API to NSArray assets[n] Fetch result
42 Making Model Changes Support for user actions Favorite a photo Add to an album Model objects are read-only, can t mutate directly
43 Change Requests API Change request classes Create in a change request block Applied asynchronously out of process
44 Change Request Classes Change request class for each model class PHAssetChangeRequest PHAssetCollectionChangeRequest PHCollectionListChangeRequest Provide model object specific APIs setcreationdate: setfavorite:
45 Change Request Classes Not subclasses of model classes Separates thread-safe, immutable model objects and mutations Only valid within a change request block
46 Change Request Example - (void)togglefavorite:(phasset *)asset { // Changes must be performed in a change block [[PHPhotoLibrary sharedphotolibrary] performchanges:^{ // Create a change request for the asset PHAssetChangeRequest *changerequest = [PHAssetChangeRequest changerequestforasset:asset]; [changerequest setfavorite:[asset isfavorite]]; } completionhandler:^(bool success, NSError *error) {... }];
47 Change Request Example - (void)togglefavorite:(phasset *)asset { // Changes must be performed in a change block [[PHPhotoLibrary sharedphotolibrary] performchanges:^{ // Create a change request for the asset PHAssetChangeRequest *changerequest = [PHAssetChangeRequest changerequestforasset:asset]; [changerequest setfavorite:[asset isfavorite]]; } completionhandler:^(bool success, NSError *error) {... }];
48 Change Request Example - (void)togglefavorite:(phasset *)asset { // Changes must be performed in a change block [[PHPhotoLibrary sharedphotolibrary] performchanges:^{ // Create a change request for the asset PHAssetChangeRequest *changerequest = [PHAssetChangeRequest changerequestforasset:asset]; [changerequest setfavorite:[asset isfavorite]]; } completionhandler:^(bool success, NSError *error) {... }];
49 Change Request Example - (void)togglefavorite:(phasset *)asset { // Changes must be performed in a change block [[PHPhotoLibrary sharedphotolibrary] performchanges:^{ // Create a change request for the asset PHAssetChangeRequest *changerequest = [PHAssetChangeRequest changerequestforasset:asset]; [changerequest setfavorite:[asset isfavorite]]; } completionhandler:^(bool success, NSError *error) {... }];
50 Change Request Example - (void)togglefavorite:(phasset *)asset { // Changes must be performed in a change block [[PHPhotoLibrary sharedphotolibrary] performchanges:^{ // Create a change request for the asset PHAssetChangeRequest *changerequest = [PHAssetChangeRequest changerequestforasset:asset]; [changerequest setfavorite:[asset isfavorite]]; } completionhandler:^(bool success, NSError *error) {... }];
51 Creating New Model Objects Create via creation request request = [PHAssetChangeRequest creationrequestforassetfromimage:image]
52 Creating New Model Objects Create via creation request request = [PHAssetChangeRequest creationrequestforassetfromimage:image] Placeholder objects placeholder = [request placeholderforcreatedasset] Reference to a new, unsaved object Add to collections Can provide unique, persistent localidentifier
53 Whither Changes? Changes are done when completion handler invoked Model objects aren t refreshed Side effects and external changes
54 Handling Model Changes Lots of sources of change Your application, other applications icloud Photo Library, icloud Photo Sharing, My Photo Stream
55 Handling Model Changes Lots of sources of change Your application, other applications icloud Photo Library, icloud Photo Sharing, My Photo Stream
56 Change Notification We publish a PHChange to registered observers Delivered on a background queue Details on updated and deleted objects
57 Change Notification We publish a PHChange to registered observers Delivered on a background queue Details on updated and deleted objects Updated fetch results Inserts, updates, deletes, and moves
58 Fetch Result Change Details Fetch results are implicitly registered for change details Diffs calculated in the background Opt-out via fetch options Get updated fetch result from the PHFetchResultChangeDetails
59 Change Handling Example, Part One - (void)photolibrarydidchange:(phchange *)change { // re-dispatch to main queue dispatch_async(dispatch_get_main_queue(), ^{ // get change details PHFetchResultChangeDetails *changedetails = [change changedetailsforfetchresult:self.assets]; // get the updated fetch results if (changedetails) { self.assets = [changedetails fetchresultafterchanges];...
60 Change Handling Example, Part One - (void)photolibrarydidchange:(phchange *)change { // re-dispatch to main queue dispatch_async(dispatch_get_main_queue(), ^{ // get change details PHFetchResultChangeDetails *changedetails = [change changedetailsforfetchresult:self.assets]; // get the updated fetch results if (changedetails) { self.assets = [changedetails fetchresultafterchanges];...
61 Change Handling Example, Part One - (void)photolibrarydidchange:(phchange *)change { // re-dispatch to main queue dispatch_async(dispatch_get_main_queue(), ^{ // get change details PHFetchResultChangeDetails *changedetails = [change changedetailsforfetchresult:self.assets]; // get the updated fetch results if (changedetails) { self.assets = [changedetails fetchresultafterchanges];...
62 Change Handling Example, Part One - (void)photolibrarydidchange:(phchange *)change { // re-dispatch to main queue dispatch_async(dispatch_get_main_queue(), ^{ // get change details PHFetchResultChangeDetails *changedetails = [change changedetailsforfetchresult:self.assets]; // get the updated fetch results if (changedetails) { self.assets = [changedetails fetchresultafterchanges];...
63 Change Handling Example, Part One - (void)photolibrarydidchange:(phchange *)change { // re-dispatch to main queue dispatch_async(dispatch_get_main_queue(), ^{ // get change details PHFetchResultChangeDetails *changedetails = [change changedetailsforfetchresult:self.assets]; // get the updated fetch results if (changedetails) { self.assets = [changedetails fetchresultafterchanges];...
64 Change Handling Example, Part Two [collectionview performbatchupdates:^{ if ([[changedetails removedindexes] count]) { NSArray *removedindexpaths = // make indexpaths from indexes [collectionview deleteitemsatindexpaths:removedindexpaths]; } if ([[changedetails insertedindexes] count]) { NSArray *insertedindexpaths =... [collectionview insertitemsatindexpaths:insertedindexpaths]; } if ([[changedetails changedindexes] count]) { NSArray *changedindexpaths =... [collectionview reloaditemsatindexpaths:changedindexpaths]; }
65 Change Handling Example, Part Two [collectionview performbatchupdates:^{ if ([[changedetails removedindexes] count]) { NSArray *removedindexpaths = // make indexpaths from indexes [collectionview deleteitemsatindexpaths:removedindexpaths]; } if ([[changedetails insertedindexes] count]) { NSArray *insertedindexpaths =... [collectionview insertitemsatindexpaths:insertedindexpaths]; } if ([[changedetails changedindexes] count]) { NSArray *changedindexpaths =... [collectionview reloaditemsatindexpaths:changedindexpaths]; }
66 Change Handling Example, Part Two [collectionview performbatchupdates:^{ if ([[changedetails removedindexes] count]) { NSArray *removedindexpaths = // make indexpaths from indexes [collectionview deleteitemsatindexpaths:removedindexpaths]; } if ([[changedetails insertedindexes] count]) { NSArray *insertedindexpaths =... [collectionview insertitemsatindexpaths:insertedindexpaths]; } if ([[changedetails changedindexes] count]) { NSArray *changedindexpaths =... [collectionview reloaditemsatindexpaths:changedindexpaths]; }
67 Change Handling Example, Part Two [collectionview performbatchupdates:^{ if ([[changedetails removedindexes] count]) { NSArray *removedindexpaths = // make indexpaths from indexes [collectionview deleteitemsatindexpaths:removedindexpaths]; } if ([[changedetails insertedindexes] count]) { NSArray *insertedindexpaths =... [collectionview insertitemsatindexpaths:insertedindexpaths]; } if ([[changedetails changedindexes] count]) { NSArray *changedindexpaths =... [collectionview reloaditemsatindexpaths:changedindexpaths]; }
68 Demo
69 Image and Video Data Karl Hsu ios Photos Frameworks
70 Requesting Image and Video Data A variety of image sizes might be available Some sizes might not be cached Videos might even be streaming
71 PHImageManager Request images based on target size Request videos based on usage Asynchronous API Optionally retrieve data from the network
72 Requesting Images // Request image data for a square grid with cells of 160x160 pixels [manager requestimageforasset:photo targetsize:cgsizemake(160,160) contentmode:phimagecontentmodeaspectfill options:nil resulthandler:^(uiimage *result, NSDictionary *info) { if (result) { [cell setimage:result]; } else {... } }];
73 Advanced Image Requests // Create Image Request object PHImageRequestOptions *options = [PHImageRequestOptions new]; // Fetch the image from icloud if necessary and provide progress options.networkaccessallowed = YES; options.progresshandler = ^(BOOL degraded, double progress, NSError *error, BOOL *stop) { [self updateuservisibleprogress:progress error:error]; }; // Use the options to control the request behavior [manager requestimageforasset:... options:options...];
74 Advanced Image Requests // Create Image Request object PHImageRequestOptions *options = [PHImageRequestOptions new]; // Fetch the image from icloud if necessary and provide progress options.networkaccessallowed = YES; options.progresshandler = ^(BOOL degraded, double progress, NSError *error, BOOL *stop) { [self updateuservisibleprogress:progress error:error]; }; // Use the options to control the request behavior [manager requestimageforasset:... options:options...];
75 Advanced Image Requests // Create Image Request object PHImageRequestOptions *options = [PHImageRequestOptions new]; // Fetch the image from icloud if necessary and provide progress options.networkaccessallowed = YES; options.progresshandler = ^(BOOL degraded, double progress, NSError *error, BOOL *stop) { [self updateuservisibleprogress:progress error:error]; }; // Use the options to control the request behavior [manager requestimageforasset:... options:options...];
76 Advanced Image Requests // Create Image Request object PHImageRequestOptions *options = [PHImageRequestOptions new]; // Fetch the image from icloud if necessary and provide progress options.networkaccessallowed = YES; options.progresshandler = ^(BOOL degraded, double progress, NSError *error, BOOL *stop) { [self updateuservisibleprogress:progress error:error]; }; // Use the options to control the request behavior [manager requestimageforasset:... options:options...];
77 Image Request Callbacks [manager requestimageforasset:... ^(UIImage *result, NSDictionary *info) { }]; // This block can be called multiple times
78 Image Request Callbacks [manager requestimageforasset:... ^(UIImage *result, NSDictionary *info) { }]; // This block can be called multiple times First callback synchronous
79 Image Request Callbacks [manager requestimageforasset:... ^(UIImage *result, NSDictionary *info) { }]; // This block can be called multiple times First callback synchronous
80 Image Request Callbacks [manager requestimageforasset:... ^(UIImage *result, NSDictionary *info) { }]; // This block can be called multiple times First callback synchronous Second callback asynchronous
81 Requesting Videos // Request a playback item for video playback [manager requestplayeritemforvideo:video options:nil resulthandler:^(avplayeritem *item, NSDictionary *info) { AVPlayer *player = [AVPlayer playerwithplayeritem:playeritem]; }];
82 Advanced Video Requests // Create Video Request object PHVideoRequestOptions *options = [PHVideoRequestOptions new]; // Make sure we have the best quality options.deliverymode = PHVideoRequestOptionsDeliveryModeHighQualityFormat; // Fetch the video from icloud if necessary and provide progress options.networkaccessallowed = YES; options.progresshandler = ^(double progress, NSError *error, BOOL *stop) { [self updateuservisibleprogress:progress error:error]; }; // Use the options to control the request behavior [manager requestexportsessionforvideo:video options:options...];
83 Advanced Video Requests // Create Video Request object PHVideoRequestOptions *options = [PHVideoRequestOptions new]; // Make sure we have the best quality options.deliverymode = PHVideoRequestOptionsDeliveryModeHighQualityFormat; // Fetch the video from icloud if necessary and provide progress options.networkaccessallowed = YES; options.progresshandler = ^(double progress, NSError *error, BOOL *stop) { [self updateuservisibleprogress:progress error:error]; }; // Use the options to control the request behavior [manager requestexportsessionforvideo:video options:options...];
84 Advanced Video Requests // Create Video Request object PHVideoRequestOptions *options = [PHVideoRequestOptions new]; // Make sure we have the best quality options.deliverymode = PHVideoRequestOptionsDeliveryModeHighQualityFormat; // Fetch the video from icloud if necessary and provide progress options.networkaccessallowed = YES; options.progresshandler = ^(double progress, NSError *error, BOOL *stop) { [self updateuservisibleprogress:progress error:error]; }; // Use the options to control the request behavior [manager requestexportsessionforvideo:video options:options...];
85 Advanced Video Requests // Create Video Request object PHVideoRequestOptions *options = [PHVideoRequestOptions new]; // Make sure we have the best quality options.deliverymode = PHVideoRequestOptionsDeliveryModeHighQualityFormat; // Fetch the video from icloud if necessary and provide progress options.networkaccessallowed = YES; options.progresshandler = ^(double progress, NSError *error, BOOL *stop) { [self updateuservisibleprogress:progress error:error]; }; // Use the options to control the request behavior [manager requestexportsessionforvideo:video options:options...];
86 Advanced Video Requests // Create Video Request object PHVideoRequestOptions *options = [PHVideoRequestOptions new]; // Make sure we have the best quality options.deliverymode = PHVideoRequestOptionsDeliveryModeHighQualityFormat; // Fetch the video from icloud if necessary and provide progress options.networkaccessallowed = YES; options.progresshandler = ^(double progress, NSError *error, BOOL *stop) { [self updateuservisibleprogress:progress error:error]; }; // Use the options to control the request behavior [manager requestexportsessionforvideo:video options:options...];
87 Scrolling Performance Scrolling a grid of thumbnails Maintain a cache around the visible range Start caching ahead of the scroll Stop caching behind the scroll
88 PHCachingImageManager Preloads and caches images Request against the caching image manager Requests are resolved against cached data Instance for each view controller
89 Preheating
90 Preheating
91 Preheating Visible Range
92 Preheating Visible Range Start Caching
93 Preheating Stop Caching Visible Range Start Caching
94 Preheating Stop Caching Visible Range Start Caching
95 PHCachingImageManager // Use the same args as for requestimageforasset PHCachingImageManager *cim = [self cachingimagemanager]; NSArray *soontobevisibleassets =... [cim startcachingimagesforassets:soontobevisibleassets targetsize:targetsize contentmode:phimagecontentmodeaspectfill options:nil]; NSArray *previouslyvisibleassets =... [cim stopcachingimagesforassets:previouslyvisibleassets targetsize:targetsize contentmode:phimagecontentmodeaspectfill options:nil];
96 PHCachingImageManager // Use the same args as for requestimageforasset PHCachingImageManager *cim = [self cachingimagemanager]; NSArray *soontobevisibleassets =... [cim startcachingimagesforassets:soontobevisibleassets targetsize:targetsize contentmode:phimagecontentmodeaspectfill options:nil]; NSArray *previouslyvisibleassets =... [cim stopcachingimagesforassets:previouslyvisibleassets targetsize:targetsize contentmode:phimagecontentmodeaspectfill options:nil];
97 PHCachingImageManager // Use the same args as for requestimageforasset PHCachingImageManager *cim = [self cachingimagemanager]; NSArray *soontobevisibleassets =... [cim startcachingimagesforassets:soontobevisibleassets targetsize:targetsize contentmode:phimagecontentmodeaspectfill options:nil]; NSArray *previouslyvisibleassets =... [cim stopcachingimagesforassets:previouslyvisibleassets targetsize:targetsize contentmode:phimagecontentmodeaspectfill options:nil];
98 Editing Images and Videos In-place No need to save as a new asset Nondestructive Visible everywhere Synced via icloud Photo Library
99 Editing Flow Input Image
100 Editing Flow Input Image
101 Editing Flow Your Code Input Image 30820bd806092a f70d010702a0 820bc930820bc b b0e03021a c06092a f70d010701a d b
102 Editing Flow Your Code Input Image
103 Editing Flow Your Code Output Image
104 Getting Input // Get the input from the asset [asset requestcontenteditinginputwithoptions:options completionhandler:^(phcontenteditinginput *editinginput, NSDictionary *info) { }
105 Getting Input // Get the input from the asset [asset requestcontenteditinginputwithoptions:options completionhandler:^(phcontenteditinginput *editinginput, NSDictionary *info) { NSURL *url = [editinginput fullsizeimageurl]; int orientation = [editinginput fullsizeimageorientation]; } CIImage *inputimage = [CIImage imagewithcontentsofurl:url options:nil]; inputimage = [inputimage imagebyapplyingorientation:orientation]; // Your code here
106 Saving Output // Create the output PHContentEditingOutput *output = [[PHContentEditingOutput alloc] initwithcontenteditinginput:input]; [jpegdata writetourl:output.renderedcontenturl atomically:yes]; output.adjustmentdata = adjustmentdata;
107 Saving Output // Create the output PHContentEditingOutput *output = [[PHContentEditingOutput alloc] initwithcontenteditinginput:input]; [jpegdata writetourl:output.renderedcontenturl atomically:yes]; output.adjustmentdata = adjustmentdata; // Save the output to the asset [library performchanges:^{ PHAssetChangeRequest *request =... [request setcontenteditingoutput:contenteditingoutput]; } completionhandler:^(bool success, NSError *error) {}];
108 Resumable Edits
109 Resumable Edits + = Noir, 100% Adjustment Data
110 Resumable Edits Input + = Noir, 100% Adjustment Data
111 Resumable Edits Input + = Noir, 100% Adjustment Data Output
112 Saving Adjustment Data NSData *archiveddata = [NSKeyedArchiver archiveddatawithrootobject:settings]; PHAdjustmentData *adjustmentdata = [[PHAdjustmentData alloc] initwithformatidentifier:@"com.mycompany" formatversion:@"1.0" data:archiveddata]; PHContentEditingOutput *output =... output.adjustmentdata = adjustmentdata;
113 Adjustment Data PHContentEditingInputRequestOptions *options = // Do you understand the current adjustment options.canhandleadjustmentdata:^bool(phadjustmentdata *adjustmentdata) { }
114 Adjustment Data PHContentEditingInputRequestOptions *options = // Do you understand the current adjustment options.canhandleadjustmentdata:^bool(phadjustmentdata *adjustmentdata) { return [adjustmentdata.formatidentifier isequal:@"com.mycompany"] && [adjustmentdata.formatversion isequal:@"1.0"]; }
115 Adjustment Understood? Yes Input + = Noir, 100% Adjustment Data
116 Adjustment Understood? No. Input + = Noir, 100% Adjustment Data
117 Demo
118 Photo Editing Extensions PhotosUI framework Simon Bovet ios Photos Frameworks
119 Photo Editing Extension Your image or video editor Available from built-in Photos and Camera apps
120
121
122
123
124 What s Needed App extension target UIViewController subclass Protocol adoption
125 What s Needed App extension target UIViewController subclass Protocol adoption
126 Xcode Template Add new target to your app s project Choose Photo Editing Extension
127 User Interface Navigation bar displayed by Photos app Avoid navigation bar-based design for your extension Your extension s UI
128 What s Needed App extension target UIViewController subclass Protocol adoption
129 Protocol Adoption PHContentEditingController startcontenteditingwithinput: finishcontenteditingwithcompletionhandler: canhandleadjustmentdata: cancelcontentediting
130 Protocol Adoption PHContentEditingController startcontenteditingwithinput: finishcontenteditingwithcompletionhandler: canhandleadjustmentdata: cancelcontentediting
131 Protocol Adoption PHContentEditingController startcontenteditingwithinput: finishcontenteditingwithcompletionhandler: canhandleadjustmentdata: cancelcontentediting
132 Getting Input - (void)startcontenteditingwithinput:(phcontenteditinginput *)input placeholderimage:(uiimage *)placeholderimage { UIImage *image = input.displaysizeimage; id settings = [self settingsfromadjustmentdata:input.adjustmentdata]; if (settings) { settings = [self defaultsettings]; }... // set up user interface } self.input = input;
133 Getting Input - (void)startcontenteditingwithinput:(phcontenteditinginput *)input placeholderimage:(uiimage *)placeholderimage { UIImage *image = input.displaysizeimage; id settings = [self settingsfromadjustmentdata:input.adjustmentdata]; if (settings) { settings = [self defaultsettings]; }... // set up user interface } self.input = input;
134 Getting Input - (void)startcontenteditingwithinput:(phcontenteditinginput *)input placeholderimage:(uiimage *)placeholderimage { UIImage *image = input.displaysizeimage; id settings = [self settingsfromadjustmentdata:input.adjustmentdata]; if (settings) { settings = [self defaultsettings]; }... // set up user interface } self.input = input;
135 Protocol Adoption PHContentEditingController startcontenteditingwithinput: finishcontenteditingwithcompletionhandler: canhandleadjustmentdata: cancelcontentediting Your extension s UI
136 Protocol Adoption PHContentEditingController startcontenteditingwithinput: finishcontenteditingwithcompletionhandler: canhandleadjustmentdata: cancelcontentediting Your extension s UI
137 Saving Output - (void)finishcontenteditingwithcompletionhandler: (void (^)(PHContentEditingOutput *))completionhandler { NSData *jpegdata =...; PHAdjustmentData *adjustmentdata =...; PHContentEditingOutput *output = [[PHContentEditingOutput alloc] initwithcontenteditinginput:self.input]; [jpegdata writetourl:output.renderedcontenturl atomically:yes]; output.adjustmentdata = adjustmentdata; } completionhandler(output);
138 Saving Output - (void)finishcontenteditingwithcompletionhandler: (void (^)(PHContentEditingOutput *))completionhandler { NSData *jpegdata =...; PHAdjustmentData *adjustmentdata =...; PHContentEditingOutput *output = [[PHContentEditingOutput alloc] initwithcontenteditinginput:self.input]; [jpegdata writetourl:output.renderedcontenturl atomically:yes]; output.adjustmentdata = adjustmentdata; } completionhandler(output);
139 Saving Output - (void)finishcontenteditingwithcompletionhandler: (void (^)(PHContentEditingOutput *))completionhandler { NSData *jpegdata =...; PHAdjustmentData *adjustmentdata =...; PHContentEditingOutput *output = [[PHContentEditingOutput alloc] initwithcontenteditinginput:self.input]; [jpegdata writetourl:output.renderedcontenturl atomically:yes]; output.adjustmentdata = adjustmentdata; } completionhandler(output);
140 Protocol Adoption PHContentEditingController startcontenteditingwithinput: finishcontenteditingwithcompletionhandler: canhandleadjustmentdata: cancelcontentediting
141 Resuming Edits - (BOOL)canHandleAdjustmentData:(PHAdjustmentData *)adjustmentdata { return [adjustmentdata.formatidentifier isequal:@"com.mycompany"] && [adjustmentdata.formatversion isequal:@"1.0"]; }
142 Protocol Adoption PHContentEditingController startcontenteditingwithinput: finishcontenteditingwithcompletionhandler: canhandleadjustmentdata: cancelcontentediting Your extension s UI
143 Protocol Adoption PHContentEditingController startcontenteditingwithinput: finishcontenteditingwithcompletionhandler: canhandleadjustmentdata: cancelcontentediting Your extension s UI
144 What s Needed App extension target UIViewController subclass Protocol adoption
145 Demo
146 Summary Photos framework Access photos and videos Build a full-featured app like the Photos app Photo editing extensions
147 More Information Allan Schaffer Graphics and Game Technologies Evangelist Documentation Photos Reference Apple Developer Forums
148 Related Sessions Creating Extensions for ios and OS X, Part One Mission Tuesday 2:00PM Creating Extensions for ios and OS X, Part Two Mission Wednesday 11:30AM Camera Capture: Manual Controls Marina Wednesday 11:30AM Advances in Core Image Pacific Heights Thursday 2:00PM Developing Core Image Filters for ios Pacific Heights Thursday 3:15PM
149 Labs Photos Framework Lab Media Lab A Thursday 11:30AM Extensions Lab Frameworks Lab B Thursday 2:00PM Photos Framework Lab Media Lab B Friday 10:15AM
150
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