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Objective-C Web API Examples

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(Objective-C) Get Individual Photo Info

Assuming we have the ID of a Photo, this example demonstrates how to retrieve the photo information and parse the JSON.

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>

// 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];

// Assumes we've already obtained a Photo ID.
NSString *photoId = @"10210199026347451";

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

// Select the fields we want.
// This example will select many of the possible fields.
// See https://developers.facebook.com/docs/graph-api/reference/photo/
[rest AddQueryParam: @"fields" value: @"id,album,can_delete,can_tag,from,height,width,images,link,name,name_tags,picture,place,target"];

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 response is shown below.
// Demonstrate how to parse values from the JSON.
NSLog(@"%@%@",@"Album name: ",[json StringOf: @"album.name"]);
BOOL canDelete = [json BoolOf: @"can_delete"];
NSLog(@"%@%d",@"Can Delete: ",canDelete);
NSLog(@"%@%@",@"From Name: ",[json StringOf: @"from.name"]);
int height = [[json IntOf: @"height"] intValue];
int width = [[json IntOf: @"width"] intValue];
NSLog(@"%@%d%@%d",@"Dimensions: ",width,@"x",height);
NSLog(@"%@%@",@"First Image Source: ",[json StringOf: @"images[0].source"]);

// A sample JSON response is shown here.  
// { 
//   "id": "10210199026347451",
//   "album": { 
//     "created_time": "2009-10-19T00:06:46+0000",
//     "name": "Timeline Photos",
//     "id": "1237223526054"
//   },
//   "can_delete": true,
//   "can_tag": true,
//   "from": { 
//     "name": "Matt Smith",
//     "id": "10224048320139890"
//   },
//   "height": 120,
//   "width": 120,
//   "images": [
//     { 
//       "height": 120,
//       "source": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026347451_7830642117574407060_n.jpg?oh=a7f9ed10cf9cd81a82adeb541c60e2e2&oe=58ABB195",
//       "width": 120
//     }
//   ],
//   "link": "https:\/\/www.facebook.com\/photo.php?fbid=10210199026347451&set=a.1237223526054.2038240.1093202869&type=3",
//   "name": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
//   "picture": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026347451_7830642117574407060_n.jpg?oh=a7f9ed10cf9cd81a82adeb541c60e2e2&oe=58ABB195"
// }
// 
 

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