ugui關於滑鼠滾輪資訊的獲取有乙個專門的介面iscrollhandler用於接收滾輪事件。繼承該事件之後便需要實現函式onscroll。
如下：
public
virtual
void
onscroll
(pointereventdata eventdata)
pointereventdata，如下：
using system;
using system.collections.generic;
namespace unityengine.eventsystems
//// 摘要:
// the camera associated with the last onpointerpress event.
public
camera presseventcamera
//// 摘要:
// the camera associated with the last onpointerenter event.
public
camera entereventcamera
//// 摘要:
// the eventsystems.pointereventdata.inputbutton for this event.
public
inputbutton button
//// 摘要:
// determines whether the user is dragging the mouse or trackpad.
public
bool dragging
//// 摘要:
// should a drag threshold be used?
public
bool usedragthreshold
//// 摘要:
// the amount of scroll since the last update.
public
vector2 scrolldelta
//// 摘要:
// number of clicks in a row.
public
int clickcount
//// 摘要:
// the last time a click event was sent.
public
float clicktime
[obsolete
("use either pointercurrentraycast.worldnormal or pointerpressraycast.worldnormal")]
public
vector3 worldnormal
[obsolete
("use either pointercurrentraycast.worldposition or pointerpressraycast.worldposition")]
public
vector3 worldposition
//// 摘要:
// the screen space coordinates of the last pointer click.
public
vector2 pressposition
//// 摘要:
// pointer delta since last update.
public
vector2 delta
//// 摘要:
// current pointer position.
public
vector2 position
//// 摘要:
// identification of the pointer.
public
int pointerid
public
bool eligibleforclick
//// 摘要:
// raycastresult associated with the pointer press.
public
raycastresult pointerpressraycast
//// 摘要:
// raycastresult associated with the current event.
public
raycastresult pointercurrentraycast
//// 摘要:
// the object that is receiving ondrag.
public
gameobject pointerdrag
//// 摘要:
public
gameobject rawpointerpress
//// 摘要:
// the gameobject for the last press event.
public
gameobject lastpress
//// 摘要:
// the object that received 'onpointerenter'.
public
gameobject pointerenter
//// 摘要:
// is the pointer moving.
//// 返回結果:
// moving.
public
bool
ispointermoving()
;//// 摘要:
// is scroll being used on the input device.
//// 返回結果:
// scrolling.
public
bool
isscrolling()
;public
override
string
tostring()
;//// 摘要:
// input press tracking.
public
enum inputbutton
//// 摘要:
// the state of a press for the given frame.
public
enum framepressstate
}}
vector2型別的字段scrolldelta中的y，便是滾輪滾動的資訊具體數值資訊：上滑滾輪為正1，下滑滾輪為負1。
通過input獲取滾輪資訊的方式為input.getaxis("mouse scrollwheel")。
public
void
onupdate()
滾輪上滑為正，下滑為負；且滾輪的每個小格卡頓，其數值資訊表示為0.1，快速連續滾動時其數值會直接出現對應的數值，不會一格一格出現。
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