(Objective-C) Emoji Tweet

Demonstrates posting a status update that includes an emoji character.

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoJsonObject.h>
#import <CkoRest.h>
#import <CkoOAuth1.h>
#import <CkoStringBuilder.h>
#import <NSString.h>

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

// ----------------------------------------------------------------------
// This initial setup, which involves setting the OAuth1 properties and connecting
// to api.twitter.com, is only required once at the beginning.  Once connected, the same
// object instance may be re-used, and if necessary, it will automatically reconnect
// as needed.

// Assume we've previously obtained an access token and saved it to a JSON file..
CkoJsonObject *json = [[CkoJsonObject alloc] init];
BOOL success = [json LoadFile: @"qa_data/tokens/twitter.json"];

CkoRest *rest = [[CkoRest alloc] init];
CkoOAuth1 *oauth1 = [[CkoOAuth1 alloc] init];

oauth1.ConsumerKey = @"TWITTER_CONSUMER_KEY";
oauth1.ConsumerSecret = @"TWITTER_CONSUMER_SECRET";
oauth1.Token = [json StringOf: @"oauth_token"];
oauth1.TokenSecret = [json StringOf: @"oauth_token_secret"];
oauth1.SignatureMethod = @"HMAC-SHA1";
[oauth1 GenNonce: [NSNumber numberWithInt: 16]];

[rest SetAuthOAuth1: oauth1 useQueryParams: NO];

BOOL bAutoReconnect = YES;
success = [rest Connect: @"api.twitter.com" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: bAutoReconnect];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

// This ends the initial setup...
// ----------------------------------------------------------------------

// For this example, I've pre-created a text file containing two emoji
// characters (the "ghost" emoji, and a "face savouring delicious food" emoji).  
// This text file was saved using the utf-8 encoding.

// The utf-8 bytes for the ghost emoji are 0x9f 0x91 0xbb.  (Note: This is the utf-8
// representation that does not use surrogate pairs.)
// 
// The utf-8 bytes for the "face savouring delicious food" emoji are \xF0\x9F\x98\x8B.

CkoStringBuilder *sbText = [[CkoStringBuilder alloc] init];
[sbText LoadFile: @"qa_data/txt/ghost_emoji.txt" charset: @"utf-8"];
[sbText Prepend: @"Test tweet using two emoji chars: "];

// Send a tweet...
[rest ClearAllQueryParams];
[rest AddQueryParam: @"status" value: [sbText GetAsString]];
NSString *resp = [rest FullRequestFormUrlEncoded: @"POST" uriPath: @"/1.1/statuses/update.json"];
if (rest.LastMethodSuccess != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

CkoJsonObject *jsonResponse = [[CkoJsonObject alloc] init];
jsonResponse.EmitCompact = NO;
[jsonResponse Load: resp];

if ([rest.ResponseStatusCode intValue] != 200) {
    NSLog(@"%@",[jsonResponse Emit]);
    return;
}

// Show the successful response:
NSLog(@"%@",[jsonResponse Emit]);
NSLog(@"%@",@"Success.");