iOS FBSDKProfilePictureView 返回空白图片

Question

所以我正在尝试创建一个用户喜欢的页面的简单滚动条，其中显示图像和名称。但是，配置文件 View 显示空白图像，而不是占位符图片，这意味着它正在接收要显示的图像。在实际的 FBSDKProfilePictureView 代码中放置一些断点后，特别是在 _updateImageWithData:state: 处，它表明对于每个图像，数据对象只有 97 个字节。有趣的是，当我创建一个独立的个人资料图片 View 时，比如

    FBSDKProfilePictureView *profilePictureView = [[FBSDKProfilePictureView alloc] initWithFrame:CGRectMake(inset, inset, profileSize, profileSize)];
    profilePictureView.profileID = @"4"; //Mark Zuckerberg's id

它正确显示图像。

所以一开始我认为这可能与设置太多的配置文件 ID 有关，从而创建了太多的 url 请求，但是如果我只运行下面的代码一次(即没有循环)它仍然返回相同的 97 个字节.

下面是我用来生成 ScrollView 的代码。

    for (int i = 0; i < numToIterate; i++) {
        NSDictionary *curr = [sharedInterests objectAtIndex:i];
        NSString *idNumber = [curr objectForKey:@"id"];
        NSString *name = [curr objectForKey:@"name"];
        NSLog(@"getting %@, %@.", name, idNumber);
        // get logo
        FBSDKProfilePictureView *itemView = [[FBSDKProfilePictureView alloc] initWithFrame:CGRectMake(i * (smallFrameWidth + horizontalBufferBetweenPics) + horizontalBufferBetweenPics, 0, smallFrameWidth,smallFrameHeight)];
        [self.scrollView addSubview:itemView];
        [itemView setProfileID:idNumber];
        // create description
        UILabel *currDescriptionLabel = [[UILabel alloc] initWithFrame:CGRectMake(i * (smallFrameWidth + horizontalBufferBetweenPics) + horizontalBufferBetweenPics, smallFrameHeight, categoryLabelWidth, categoryLabelHeight)];
        currDescriptionLabel.text = name;
        currDescriptionLabel.backgroundColor = [[UIColor blueColor] colorWithAlphaComponent:0.5];
        currDescriptionLabel.font = [UIFont fontWithName:@"HelveticaNeue-Light" size:12];
        currDescriptionLabel.textAlignment = NSTextAlignmentCenter;
        currDescriptionLabel.numberOfLines = 2;
        [scrollView addSubview:currDescriptionLabel];
    }

Answer 1

我创建了一个 modified version提供错误报告的 FBProfilePictureView。它允许您设置报告错误的完成处理程序:

self.facebookPictureView.completionHandler = ^(DBFBProfilePictureView* view, NSError* error){
    if(error) {
        view.showEmptyImage = YES;
        view.profileID = nil;
        NSLog(@"Loading profile picture failed with error: %@", error);
    } 
}