About Ugui pictures in unity drag and drop function

How to apply: Mount the following script on a UI picture that requires drag-and-drop functionality

Two kinds of drag-and-drop selection: A. Center Drag (Image Center following mouse position) m_isprecision to false;

B. Precise drag and drop (picture is mouse click position follow mouse position) m_isprecision is true;

1 /*************************************************2 * Project name: Ugui General3 * Script Creator: Magic card4 * Script creation time: 2017.12.145 * Script function: UI picture dragging function (Attach script to picture that need to drag and drop)6  * ***********************************************/7 usingUnityengine;8 usingSystem.Collections;9 usingUnityengine.eventsystems;Ten  One //UI Picture Drag function class A  Public classUidragbymocha:monobehaviour,ibegindraghandler, Idraghandler, Ienddraghandler - { -[Header ("whether the precise drag")] the      Public BOOLm_isprecision; -  -     //stores the offset between the center point of the picture and the mouse click Point -     PrivateVector3 M_offset; +  -     //Recttransform component that stores the currently dragged picture +     Privaterecttransform M_rt; A     voidStart () at     { -         //Initialize -M_rt= gameobject.getcomponent<recttransform>(); -     } -  -     //start dragging trigger in      Public voidOnbegindrag (pointereventdata eventData) -     { to         //Calculate offset operation if exact drag +         if(m_isprecision) -         { the             //mouse coordinates when storing a click * Vector3 Tworldpos; $             //UI screen coordinates converted to world coordinatesPanax NotoginsengRecttransformutility.screenpointtoworldpointinrectangle (M_rt, eventdata.position, EventData.pressEventCamera, outtworldpos); -             //Calculate offset theM_offset = transform.position-Tworldpos; +         } A             //Otherwise, the default offset is 0 the         Else +         { -M_offset =Vector3.zero; $         } $  - setdraggedposition (eventData); -     } the  -     //Trigger during draggingWuyi      Public voidOndrag (pointereventdata eventData) the     { - setdraggedposition (eventData); Wu     } -  About     //End Drag Trigger $      Public voidOnenddrag (pointereventdata eventData) -     { - setdraggedposition (eventData); -     } A  +     /// <summary> the     ///Set Picture Position method -     /// </summary> $     /// <param name= "EventData" ></param> the     Private voidsetdraggedposition (pointereventdata eventData) the     { the         //stores the current mouse location the Vector3 Globalmousepos; -         //UI screen coordinates converted to world coordinates in         if(Recttransformutility.screenpointtoworldpointinrectangle (M_rt, eventdata.position, EventData.pressEventCamera, outglobalmousepos)) the         { the             //set position and offset AboutM_rt.position = Globalmousepos +M_offset; the         } the     } the}

About Ugui pictures in unity drag and drop function