66// Copyright (c) 2013 Facebook Inc. All rights reserved.
77//
88
9+ #import < FacebookSDK/FacebookSDK.h>
910#import " OGShareViewController.h"
1011
1112@interface OGShareViewController ()
@@ -14,25 +15,138 @@ @interface OGShareViewController ()
1415
1516@implementation OGShareViewController
1617
17- - (id ) initWithNibName : ( NSString *) nibNameOrNil bundle : ( NSBundle *) nibBundleOrNil
18+ - (IBAction ) publishOGStoryWithImage : ( id ) sender
1819{
19- self = [super initWithNibName: nibNameOrNil bundle: nibBundleOrNil];
20- if (self) {
21- // Custom initialization
22- }
23- return self;
20+ // Retrieve a picture from the device's photo library
21+ /*
22+ NOTE: SDK Image size limits are 480x480px minimum resolution to 12MB maximum file size.
23+ In this app we're not making sure that our image is within those limits but you should.
24+ Error code for images that go below or above the size limits is 102.
25+ */
26+ UIImagePickerController *imagePicker = [[UIImagePickerController alloc ] init ];
27+ [imagePicker setSourceType: UIImagePickerControllerSourceTypePhotoLibrary];
28+ [imagePicker setDelegate: self ];
29+ [self presentViewController: imagePicker animated: YES completion: nil ];
30+
2431}
2532
26- - (void )viewDidLoad
33+ // When the user is done picking the image
34+ - (void )imagePickerController : (UIImagePickerController *)picker didFinishPickingMediaWithInfo : (NSDictionary *)info
2735{
28- [super viewDidLoad ];
29- // Do any additional setup after loading the view from its nib.
36+
37+ // / Package the image inside a dictionary
38+ NSArray * image = @[@{@" url" objectForKey: UIImagePickerControllerOriginalImage], @" user_generated" @" true"
39+
40+ // Create an object
41+ id <FBGraphObject> object =
42+ [FBGraphObject openGraphObjectForPostWithType: @" share-sample:tutorial"
43+ title: @" Sharing Tutorial"
44+ image: @" http://i.imgur.com/g3Qc1HN.png"
45+ url: @" https://developers.facebook.com/docs/ios/share/"
46+ description: @" Allow your users to share stories on Facebook from your app using the iOS SDK."
47+
48+ // Create an action
49+ id <FBOpenGraphAction> action = (id <FBOpenGraphAction>)[FBGraphObject graphObject ];
50+
51+ // Set image on the action
52+ // [action setObject:image forKey:@"image"];
53+
54+ // Link the object to the action
55+ [action setObject: object forKey: @" tutorial"
56+
57+ // Tag one or multiple users using the users' ids
58+ // [action setTags:@[<user-ids>]];
59+
60+ // Tag a place using the place's id
61+ id <FBGraphPlace> place = (id <FBGraphPlace>)[FBGraphObject graphObject ];
62+ [place setId: @" 141887372509674" // Facebook Seattle
63+ [action setPlace: place];
64+
65+ // Dismiss the image picker off the screen
66+ [self dismissViewControllerAnimated: YES completion: nil ];
67+
68+ // Check if the Facebook app is installed and we can present the share dialog
69+ FBOpenGraphActionShareDialogParams *params = [[FBOpenGraphActionShareDialogParams alloc ] init ];
70+ params.action = action;
71+ params.actionType = @" share-sample:complete"
72+
73+ // If the Facebook app is installed and we can present the share dialog
74+ if ([FBDialogs canPresentShareDialogWithOpenGraphActionParams: params]) {
75+ // Show the share dialog
76+ [FBDialogs presentShareDialogWithOpenGraphAction: action
77+ actionType: @" share-sample:complete"
78+ previewPropertyName: @" tutorial"
79+ handler: ^(FBAppCall *call, NSDictionary *results, NSError *error) {
80+ if (error) {
81+ // There was an error
82+ NSLog ([NSString stringWithFormat: @" Error publishing story: %@ "
83+ [[[UIAlertView alloc ] initWithTitle: @" Error posting to Facebook"
84+ message: @" Please try again later"
85+ delegate: self
86+ cancelButtonTitle: @" OK"
87+ otherButtonTitles: nil ] show ];
88+ } else {
89+ // Success
90+ NSLog (@" result %@ "
91+ }
92+ }];
93+
94+ // If the Facebook app is NOT installed and we can't present the share dialog
95+ } else {
96+ // FALLBACK: publish just a link using the Feed dialog
97+
98+ // Put together the dialog parameters
99+ NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
100+ @" Sharing Tutorial" @" name"
101+ @" Build great social apps and get more installs." @" caption"
102+ @" Allow your users to share stories on Facebook from your app using the iOS SDK." @" description"
103+ @" https://developers.facebook.com/docs/ios/share/" @" link"
104+ @" http://i.imgur.com/g3Qc1HN.png" @" picture"
105+ nil ];
106+
107+ // Show the feed dialog
108+ [FBWebDialogs presentFeedDialogModallyWithSession: nil
109+ parameters: params
110+ handler: ^(FBWebDialogResult result, NSURL *resultURL, NSError *error) {
111+ if (error) {
112+ // Error launching the dialog or publishing a story.
113+ NSLog ([NSString stringWithFormat: @" Error publishing story: %@ "
114+ } else {
115+ if (result == FBWebDialogResultDialogNotCompleted) {
116+ // User canceled.
117+ NSLog (@" User cancelled."
118+ } else {
119+ // Handle the publish feed callback
120+ NSDictionary *urlParams = [self parseURLParams: [resultURL query ]];
121+
122+ if (![urlParams valueForKey: @" post_id"
123+ // User canceled.
124+ NSLog (@" User cancelled."
125+
126+ } else {
127+ // User clicked the Share button
128+ NSString *result = [NSString stringWithFormat: @" Posted story, id: %@ " valueForKey: @" post_id"
129+ NSLog (@" result %@ "
130+ }
131+ }
132+ }
133+ }];
134+
135+ }
136+
30137}
31138
32- - (void )didReceiveMemoryWarning
33- {
34- [super didReceiveMemoryWarning ];
35- // Dispose of any resources that can be recreated.
139+ // A function for parsing URL parameters.
140+ - (NSDictionary *)parseURLParams : (NSString *)query {
141+ NSArray *pairs = [query componentsSeparatedByString: @" &"
142+ NSMutableDictionary *params = [[NSMutableDictionary alloc ] init ];
143+ for (NSString *pair in pairs) {
144+ NSArray *kv = [pair componentsSeparatedByString: @" ="
145+ NSString *val =
146+ [kv[1 ] stringByReplacingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
147+ params[kv[0 ]] = val;
148+ }
149+ return params;
36150}
37151
38152@end
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