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Objective-C Web API Examples

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(Objective-C) Read a Single Facebook Post

Demonstrates how to read the contents of a single Facebook post. A post is an individual entry in a profile's feed. The profile could be a user, page, app, or group.

Chilkat Objective-C Library Downloads

MAC OS X (Cocoa) Libs

iOS Libs

#import <CkoOAuth2.h>
#import <CkoRest.h>
#import <NSString.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>
#import <CkoDateTime.h>
#import <CkoDtObj.h>

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// This example assumes a previously obtained an access token
CkoOAuth2 *oauth2 = [[CkoOAuth2 alloc] init];
oauth2.AccessToken = @"FACEBOOK-ACCESS-TOKEN";

CkoRest *rest = [[CkoRest alloc] init];

// Connect to Facebook...
BOOL success = [rest Connect: @"graph.facebook.com" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: YES];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

// Provide the authentication credentials (i.e. the access key)
[rest SetAuthOAuth2: oauth2];

// This example assumes a post id was already retrieved.
// For example, it could've been retrieved by reading the user's feed:
// See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

NSString *postId = @"10224048320139890_10210156138515282";

CkoStringBuilder *sbPath = [[CkoStringBuilder alloc] init];
[sbPath Append: @"/v2.7/"];
[sbPath Append: postId];

// Select the fields we want.
// This example will select almost all the possible fields.
// See https://developers.facebook.com/docs/graph-api/reference/post/
[rest AddQueryParam: @"fields" value: @"id,message,created_time,caption,description,from,link,name,object_id,picture,place,privacy,properties,shares,source,status_type,story,targeting,to,type,updated_time,with_tags"];

NSString *responseJson = [rest FullRequestNoBody: @"GET" uriPath: [sbPath GetAsString]];
if (rest.LastMethodSuccess != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

CkoJsonObject *json = [[CkoJsonObject alloc] init];
json.EmitCompact = NO;
[json Load: responseJson];

// Show the JSON in human-readable format.
NSLog(@"%@",[json Emit]);

// A sample JSON response is shown here.  
// { 
//   "id": "12345678901234567_12345678900000004",
//   "message": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
//   "created_time": "2016-09-29T20:46:18+0000",
//   "from": { 
//     "name": "John Doe",
//     "id": "12345678901234567"
//   },
//   "link": "https:\/\/www.facebook.com\/photo.php?fbid=10210199026247451&set=a.1237223526054.2038240.1094202869&type=3",
//   "object_id": "10210139026347451",
//   "picture": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026647451_7830642117574407060_n.jpg?oh=a7f9ed10ce9cd81a82adeb541c60e2e2&oe=58ABB195",
//   "privacy": { 
//     "allow": "",
//     "deny": "",
//     "description": "Public",
//     "friends": "",
//     "value": "EVERYONE"
//   },
//   "status_type": "added_photos",
//   "type": "photo",
//   "updated_time": "2016-09-29T20:46:18+0000"
// }

// This is the code to parse some fields in the JSON response.
NSLog(@"%@%@",@"type: ",[json StringOf: @"type"]);
NSLog(@"%@%@",@"message: ",[json StringOf: @"message"]);
NSLog(@"%@%@",@"id: ",[json StringOf: @"id"]);
NSLog(@"%@%@",@"link: ",[json StringOf: @"link"]);
NSLog(@"%@%@",@"privacy descripton: ",[json StringOf: @"privacy.description"]);

CkoDateTime *dtime = [[CkoDateTime alloc] init];
BOOL bLocalTime = YES;
[dtime SetFromTimestamp: [json StringOf: @"created_time"]];
CkoDtObj *dt = [dtime GetDtObj: bLocalTime];
NSLog(@"%d%@%d%@%d%@%d%@%d",[dt.Month intValue],@"/",[dt.Day intValue],@"/",[dt.Year intValue],@"  ",[dt.Hour intValue]
    ,@":",[dt.Minute intValue]);
 

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