swift - Firebase 在 Swift 中迭代快照

Question

我的应用程序中有这段代码:

DataService.dataService.USERS_REF.childByAppendingPath(DataService.dataService.CURRENT_USER_ID).childByAppendingPath("groups").observeSingleEventOfType(.Value, withBlock: { snapshot in

  print(snapshot)

})

如果我打印结果，我只会得到这个值的快照:

Snap (groups) {
    "-KBAX-d4UNQMZErrTqPD" = true;
    "-KBAX0rrrR-trRZc408F" = true;
    "-KBAX2-lrGd-Bx2zVizv" = true;
    "-KBCL_xUjm-kf1JsGgpA" = true;
    "-KBCOlullSmzi46ecf9J" = true;
}

如果我打印 snapshot.key 我得到

groups

如果我打印 snapshot.value 我会得到

{
    "-KBAX-d4UNQMZErrTqPD" = true;
    "-KBAX0rrrR-trRZc408F" = true;
    "-KBAX2-lrGd-Bx2zVizv" = true;
    "-KBCL_xUjm-kf1JsGgpA" = true;
    "-KBCOlullSmzi46ecf9J" = true;
}

有没有办法遍历所有快照值并获取每个值的所有键和值？在本例中，此快照中有 5 个键和值。

Answer 1

没关系，我已经找到了解决方案。在这种情况下:

DataService.dataService.USERS_REF.childByAppendingPath(DataService.dataService.CURRENT_USER_ID).childByAppendingPath("groups").observeSingleEventOfType(.Value, withBlock: { snapshot in

    for rest in snapshot.children.allObjects as! [FDataSnapshot] {
        print(rest.key)
    }
})