Question

我正在尝试将其从服务器下载到Instagram后共享图像，这是我用来从服务器下载图像的代码

- (IBAction) DownloadImage:(id)sender {
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

        NSURL *url = [NSURL URLWithString:sender];
        NSData *data = [NSData dataWithContentsOfURL:url];

        dispatch_async(dispatch_get_main_queue(), ^{

            UIImage *viewImage = [[UIImage alloc] initWithData:data];
            UIImageWriteToSavedPhotosAlbum(img, self, @selector(image:didFinishSavingWithError:contextInfo:), (__bridge void *)(img));

        });
    });
}

现在图像已保存到相册中，如何在下载后立即在Instagram应用中打开它？

图像尺寸始终大于612x612px

Answer 1

过了一会儿，我找到了答案并将其修改为我的代码

@property (nonatomic, retain) UIDocumentInteractionController *dic;


- (IBAction) DownloadImage:(id)sender {
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

        NSURL *url = [NSURL URLWithString:sender];
        NSData *data = [NSData dataWithContentsOfURL:url];

        dispatch_async(dispatch_get_main_queue(), ^{

            UIImage *screenShot = [[UIImage alloc] initWithData:data];

            NSString *imagePath = [NSString stringWithFormat:@"%@/image.igo", [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]];
            [[NSFileManager defaultManager] removeItemAtPath:imagePath error:nil];
            [UIImagePNGRepresentation(screenShot) writeToFile:imagePath atomically:YES];

            _dic = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:imagePath]];
            _dic.delegate = self;
            _dic.UTI = @"com.instagram.exclusivegram";

            NSURL *instagramURL = [NSURL URLWithString:@"instagram://media?id=MEDIA_ID"];
            if ([[UIApplication sharedApplication] canOpenURL:instagramURL]) {
                [self.dic presentOpenInMenuFromRect:self.view.frame inView:self.view animated:YES];
            }

            else {
                NSLog(@"no instagram app found");
            }
        });
    });
}

下载图像表单服务器然后共享到instagram

1 个答案: