Awesome

基于UGUI的拖拽组件系统，主要支持以下功能：

1. Item的自由拖拽及与Target的附着；
2. Item和Target响应Enter、Exit、Attach、Detach等事件，并通过代理为其添加回调；
3. 使用matchingChannel来限制只有特定通道的Item和Target可以匹配；
4. 使用matchingTag来识别不同的目标类别；
5. 支持点击或长按Item使其从Target脱离；
6. 除拖放之外，Item还支持响应点击事件，并兼容ScrollRect的拖动事件；

用法详见工程中附带的示例，场景Scene及脚本TestScript。

A Drag&Drop components system based on UGUI that has the following features:

1. Drag Items freely and attach them to Targets;
2. Items and Targets can receive callback events like Enter, Exit, Attach, Detach etc;
3. Use matchingChannel to make sure that only Items and Targets with exact channels can match;
4. Use matchingTag to identify different Item or Target types;
5. Detach with long press is supported;
6. Items can also receive click events and are able to work with drag events of a ScrollRect as well;

For more details please run Scene or view TestScript.