WDGDataEventType
枚举类型，主要用于监听数据变化。
WDGDataEventTypeChildAdded
Section titled “WDGDataEventTypeChildAdded”WDGDataEventTypeChildAdded当有新增子节点时触发。
WDGDataEventTypeChildRemoved
Section titled “WDGDataEventTypeChildRemoved”WDGDataEventTypeChildRemoved当有子节点被删除时触发。
WDGDataEventTypeChildChanged
Section titled “WDGDataEventTypeChildChanged”WDGDataEventTypeChildChanged当某个子节点发生变化时触发。
WDGDataEventTypeChildMoved
Section titled “WDGDataEventTypeChildMoved”WDGDataEventTypeChildMoved当有子节排序发生变化时触发。
WDGDataEventTypeValue
Section titled “WDGDataEventTypeValue”WDGDataEventTypeValue当有数据请求或有任何数据发生变化时触发。