iOS Box SDK BoxFolder.孩子总是nil

Question

我可以通过使用[Box createFolderWithName:]获得folder_id。但是当我尝试使用folder_id来获取其子时，它不起作用。下面是我的代码:

[Box createFolderWithName:@"My APP" parentFolderID:[Box rootFolderID] share:NO callbacks:^(id<BoxOperationCallbacks>on){
    on.userInfo (^(NSDictionary* result) {
        // do something with the return value (typically stored with key @"results") of the operation
        NSNumber *appFolderId = [result objectForKey:@"folder_id"];
        BoxFolder *appFolder = [Box folderWithID:appFolderId];
        [appFolder updateWithCallbacks:^(id<BoxOperationCallbacks>on){
            on.after(^(BoxCallbackResponse response) {
                if (response == BoxCallbackResponseSuccessful) {
                    NSLog(@"Folder updated. Children count is: %d", [appFolder.children count]);
                    // Send a notification, call a delegate, use KVO use locally or whatever to use the children.
                }
                else {
                    NSLog(@"Folder not updated.");
                }
            });

        }];

    });
}];

children总是nil。我也尝试了[Box rootFolder]，但结果相同。

谁能帮我一下吗?谢谢。

Answer 1

我想下面的示例可能会有帮助。

if (appFolder.isFolder) {
        [appFolder updateWithCallbacks:^(id<BoxOperationCallbacks> on) {
            on.after(^(BoxCallbackResponse response) {
                if (response == BoxCallbackResponseSuccessful) {
                    NSLog(@"Folder updated. Children count is: %d", [appFolder.children count]);
                    // Send a notification, call a delegate, use KVO use locally or whatever to use the children.
                }
                else {
                    NSLog(@"Folder not updated.");
                }
            });
        }];
    }
    else {
        NSLog(@"NOT WORKING WITH A FOLDER!");
    }