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iOS

How To Select The Image From Library ?

Hello guys, i'm working on my test project with twitter API. Could anybody give me an idea how to select an image to upload to twitter with a status message using their update with media API ( https://dev.twitter.com/docs/api/1.1/post/statuses/update_with_media ) . I already successfully upload an image by getting image url from the web and parse it to twitter API. Now i want to select the image from the library or take a new photo to make a new twitter status. btw, here is my code on implementation file.

#import "ViewController.h"
#import <Social/Social.h>
#import <Accounts/Accounts.h>

@interface ViewController ()

@property (nonatomic) ACAccountStore *accountStore;

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
  NSURL *imageURL = [NSURL URLWithString:@"https://www.google.com/images/srpr/logo11w.png"];
    NSData *imageData = [NSData dataWithContentsOfURL:imageURL];
    UIImage *image = [UIImage imageWithData:imageData scale:10.0f];
    [self postImage:image withStatus:@"googletest"];


- (void)postImage:(UIImage *)image withStatus:(NSString *)status {

    NSURL *url = [NSURL URLWithString:@"https://api.twitter.com/1.1/statuses/update_with_media.json"];
    NSMutableDictionary *paramater = [[NSMutableDictionary alloc] init];

    //set the parameter here. to see others acceptable parameters find it at twitter API here : http://bit.ly/Occe6R
    [paramater setObject:status forKey:@"status"];

    ACAccountStore *accountStore = [[ACAccountStore alloc] init];
    ACAccountType *accountType = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];

    [accountStore requestAccessToAccountsWithType:accountType options:nil completion:^(BOOL granted, NSError *error) {
        if (granted == YES) {

            NSArray *accountsArray = [accountStore accountsWithAccountType:accountType];

            if ([accountsArray count] > 0) {
                ACAccount *twitterAccount = [accountsArray lastObject];

                SLRequest *postRequest = [SLRequest requestForServiceType:SLServiceTypeTwitter requestMethod:SLRequestMethodPOST URL:url parameters:paramater];

                NSData *imageData = UIImageJPEGRepresentation(image, 1.f);
                [postRequest addMultipartData:imageData withName:@"media[]" type:@"image/jpeg" filename:@"image.jpg"];

                [postRequest setAccount:twitterAccount]; // or  postRequest.account = twitterAccount;

                [postRequest performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {
                    NSString *output = [NSString stringWithFormat:@"HTTP response status: %i", [urlResponse statusCode]];
                    NSLog(@"output = %@",output);
                    dispatch_async(dispatch_get_main_queue(), ^{

                    });

                }];
            }

        }
    }];


}

2 Answers

Thank you. I will try to understand and try to do it.