iphone - 从 iOS 中的 iPhone 相机库将图像发布到 Facebook

Question

我正在使用以下方法将照片发布到 Facebook。它工作正常，但是图像设置如下:NSURL *url = [NSURL URLWithString:@"http://www.example.com/image.png"];

我想让用户从他们的 iPhone 相机文件夹中选择图像。我将如何着手执行此操作 - 从相册中检索图像并通过此方法发送它？

谢谢你的帮助

- (void)apiGraphUserPhotosPost {
    [self showActivityIndicator];
    currentAPICall = kAPIGraphUserPhotosPost;
    AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

    // Download a sample photo
    NSURL *url = [NSURL URLWithString:@"http://www.example.com/image.png"];
    NSData *data = [NSData dataWithContentsOfURL:url];
    UIImage *img  = [[UIImage alloc] initWithData:data];
    NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                   img, @"picture",
                                   nil];
    [img release];

    [[delegate facebook] requestWithGraphPath:@"me/photos"
                          andParams:params
                      andHttpMethod:@"POST"
                        andDelegate:self];
}

Answer 1

如果您已完成从图库中选择图片的操作？

如果没有，请按照步骤 here in this blog entry ，一旦你得到图像，然后简单地这样做:

UIImage *img  = yourImageFromLibrary;
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                   img, @"picture",
                                   nil];
... //rest of code