C# Unity3D UI，是否计算拖动项目的位置？
现在，在Unity中拖动UI元素非常容易：制作一些UI项。添加组件->事件->事件触发器。点击下面的脚本。单击以添加四个明显的触发器。你完了 不过 我完全迷失在指针坐标和用户界面坐标之间的关系中（如RectTransform等所示） 在下面的C# Unity3D UI，是否计算拖动项目的位置？,c#,unity3d,unity3d-ui,C#,Unity3d,Unity3d Ui,现在，在Unity中拖动UI元素非常容易：制作一些UI项。添加组件->事件->事件触发器。点击下面的脚本。单击以添加四个明显的触发器。你完了 不过 我完全迷失在指针坐标和用户界面坐标之间的关系中（如RectTransform等所示） 在下面的DragIt中：你他妈的怎么能在手指下正确移动UI面板 假设您有一个大面板，面板上有十个UIButton，按钮上有Dragster。RectTransform坐标和鼠标指针之间的关系是什么 简言之，如何在下面的DragIt（）中移动其中一个按钮 我会让你的脚
DragItDragster我会让你的脚本实现拖动接口
公共类Dragster:MonoBehavior、iRegindragHandler、IENDragHandler、IDragHandlerDragItpublic void OnDrag(PointerEventData eventData)
{
transform.position += (Vector3)eventData.delta;
}
DragItDragIt（PointerEventData eventData）这实际上是一个基于Uri和Colton代码的拖放“UnityEngine.UI”项的完整解决方案。复制粘贴即可 为Unity UI、wtt Colton和Uri提供无需大脑的完美拖放功能，复制粘贴效果令人惊叹：
使用UnityEngine；
使用UnityEngine.UI；
使用UnityEngine.EventSystems；
公共类不可拖动：单一行为，
IbRegindRagHandler，IDragHandler，IendRagHandler，IDropHandler
{
公众形象幽灵；
//注意：不要试图拖动实际项目：这不值得麻烦。
//出现了一个问题，你不能把它放在上面（正如你所希望的那样）
//视觉上），并且仍然很容易得到滴水。始终使用幽灵。
//即使拖动时希望“原始不可见”，
//只要把它藏起来，然后用鬼魂。一切都是非常可怕的
//如果不移动原件，则更容易。
无效唤醒（）
{
ghost.raycastTarget=false；
//（以防万一你忘了在编辑器里做那件事）
ghost.enabled=false；
}
公共void OnBeginDrag（PointerEventData事件数据）
{
ghost.transform.position=transform.position；
ghost.enabled=true；
}
public void OnDrag（PointerEventData事件数据）
{
ghost.transform.position+=（Vector3）eventData.delta；
}
公共无效OnEndRag（PointerEventData事件数据）
{
ghost.enabled=false；
}
公共无效OnDrop（PointerEventData数据）
{
GameObject fromItem=data.pointerDrag；
if（data.pointerDrag==null）返回；//（永远不会发生）
undraggable d=fromItem.GetComponent（）；
如果（d==null）
{
//意味着与我们的系统无关的东西被拖了出来。
//例如，只是一个不相关的滚动区域，等等。
//完全忽略这些。
返回；
//注意，如果非常罕见，您有多个“系统”
//对于同一屏幕上的无法拖动的项目，请注意
//区分它们！示例解决方案，检查父母是否相同。
}
Log（“将”+fromtime.name+“删除到”+gameObject.name）；
//您的代码可能如下所示：
YourThings fromThing=fromItem.GetComponent（）.info；
YourThings untoThing=gameObject.GetComponent（）.info；
你的老板反对。从一件事到另一件事（从一件事到另一件事）；
}
}
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
public class Draggable : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler {
public void OnBeginDrag(PointerEventData eventData) {
}
public void OnDrag(PointerEventData eventData) {
//Debug.Log ("OnDrag");
this.transform.position = eventData.position;
}
public void OnEndDrag(PointerEventData eventData) {
Debug.Log ("OnEndDrag");
}
}
// allow dragging with two basic problem fixes:
// - limit drag to the parent box
// - don't "jump" based on where you hold down
using UnityEngine;
using UnityEngine.EventSystems;
public class AmazingUPDrag : MonoBehaviour,
IBeginDragHandler, IDragHandler, IEndDragHandler
{
Vector2 dragOffset = Vector2.zero;
Vector2 limits = Vector2.zero;
public void OnBeginDrag(PointerEventData eventData)
{
dragOffset = eventData.position - (Vector2)transform.position;
limits = transform.parent.GetComponent<RectTransform>().rect.max;
}
public void OnDrag(PointerEventData eventData)
{
transform.position = eventData.position - dragOffset;
var p = transform.localPosition;
if (p.x < -limits.x) { p.x = -limits.x; }
if (p.x > limits.x) { p.x = limits.x; }
if (p.y < -limits.y) { p.y = -limits.y; }
if (p.y > limits.y) { p.y = limits.y; }
transform.localPosition = p;
}
public void OnEndDrag(PointerEventData eventData)
{
dragOffset = Vector2.zero;
}
}
使用UnityEngine；
使用UnityEngine.EventSystems；
公共课：单一行为，
IbRegindRagHandler、IDragHandler、IENDRagHandler
{
Vector2 dragOffset=Vector2.0；
Vector2极限=Vector2.0；
公共void OnBeginDrag（PointerEventData事件数据）
{
dragOffset=eventData.position-（Vector2）transform.position；
限制=transform.parent.GetComponent（）.rect.max；
}
public void OnDrag（PointerEventData事件数据）
{
transform.position=eventData.position-dragOffset；
var p=transform.localPosition；
如果（p.x<-limits.x）{p.x=-limits.x；}
如果（p.x>limits.x）{p.x=limits.x；}
如果（p.y<-limits.y）{p.y=-limits.y；}
如果（p.y>limits.y）{p.y=limits.y；}
transform.localPosition=p；
}
公共无效OnEndRag（PointerEventData事件数据）
{
dragOffset=矢量2.0；
}
}
boolbeingdrable=false的方法。如果你这样做的话，你就不知道哪个按钮或图像被拖动了
拖动UI：
借助RectTransformUtility
将屏幕点转换为RectTransform中的本地点，然后使用Canvas.transform.TransformPoint
查找子UI的确切位置
public Canvas parentCanvasOfImageToMove;
Vector2 pos;
RectTransformUtility.ScreenPointToLocalPointInRectangle(parentCanvasOfImageToMove.transform as RectTransform, eventData.position, parentCanvasOfImageToMove.worldCamera, out pos);
UIToMove.transform.position = parentCanvasOfImageToMove.transform.TransformPoint(pos);
在其他答案中，拖动代码看起来比其他拖动代码更复杂，但它似乎在每个画布相机模式下都能工作
检测将要拖动的对象using UnityEngine;
using UnityEngine.EventSystems;
public class AmazingUPDrag : MonoBehaviour,
IBeginDragHandler, IDragHandler, IEndDragHandler
{
Vector2 dragOffset = Vector2.zero;
Vector2 limits = Vector2.zero;
public void OnBeginDrag(PointerEventData eventData)
{
dragOffset = eventData.position - (Vector2)transform.position;
limits = transform.parent.GetComponent<RectTransform>().rect.max;
}
public void OnDrag(PointerEventData eventData)
{
transform.position = eventData.position - dragOffset;
var p = transform.localPosition;
if (p.x < -limits.x) { p.x = -limits.x; }
if (p.x > limits.x) { p.x = limits.x; }
if (p.y < -limits.y) { p.y = -limits.y; }
if (p.y > limits.y) { p.y = limits.y; }
transform.localPosition = p;
}
public void OnEndDrag(PointerEventData eventData)
{
dragOffset = Vector2.zero;
}
}
public Canvas parentCanvasOfImageToMove;
Vector2 pos;
RectTransformUtility.ScreenPointToLocalPointInRectangle(parentCanvasOfImageToMove.transform as RectTransform, eventData.position, parentCanvasOfImageToMove.worldCamera, out pos);
UIToMove.transform.position = parentCanvasOfImageToMove.transform.TransformPoint(pos);
objectToBeDragged = eventData.pointerCurrentRaycast.gameObject;
if (eventData.pointerCurrentRaycast.gameObject == someOtherUI)
{
someOtherUI....drag
}
objectToBeDragged = eventData.pointerCurrentRaycast.gameObject;
Button tempButton = objectToBeDragged.GetComponent<Button>();
Image tempImage = objectToBeDragged.GetComponent<Image>();
objectToBeDragged = eventData.pointerCurrentRaycast.gameObject;
Button tempButton = objectToBeDragged.GetComponent<Button>();
Image tempImage = objectToBeDragged.GetComponent<Image>();
Text tempText = objectToBeDragged.GetComponent<Text>();
if (tempText != null)
{
tempButton = tempText.GetComponentInParent<Button>();
tempImage = tempText.GetComponentInParent<Image>();
if (tempButton != null && tempImage != null)
{
//This is a Button
}
}
public class UIDRAGGER : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
{
public Canvas parentCanvasOfImageToMove;
//10 UI Buttons (Assign in Editor)
public Button[] UIButtons;
//2 UI Panels/Images (Assign in Editor)
public Image[] UIPanels;
//Hold which Button or Image is selected
private Button selectedButton;
private Image selectedUIPanels;
//Used to make sure that the UI is position exactly where mouse was clicked intead of the default center of the UI
Vector3 moveOffset;
//Used to decide which mode we are in. Button Drag or Image/Panel Mode
private DragType dragType = DragType.NONE;
void Start()
{
parentCanvasOfImageToMove = gameObject.GetComponent<Canvas>();
}
//Checks if the Button passed in is in the array
bool buttonIsAvailableInArray(Button button)
{
bool _isAValidButton = false;
for (int i = 0; i < UIButtons.Length; i++)
{
if (UIButtons[i] == button)
{
_isAValidButton = true;
break;
}
}
return _isAValidButton;
}
//Checks if the Panel/Image passed in is in the array
bool imageIsAvailableInArray(Image image)
{
bool _isAValidImage = false;
for (int i = 0; i < UIPanels.Length; i++)
{
if (UIPanels[i] == image)
{
_isAValidImage = true;
break;
}
}
return _isAValidImage;
}
void selectButton(Button button, Vector3 currentPos)
{
//check if it is in the image array that is allowed to be moved
if (buttonIsAvailableInArray(button))
{
//Make the image the current selected image
selectedButton = button;
dragType = DragType.BUTTONS;
moveOffset = selectedButton.transform.position - currentPos;
}
else
{
//Clear the selected Button
selectedButton = null;
dragType = DragType.NONE;
}
}
void selectImage(Image image, Vector3 currentPos)
{
//check if it is in the image array that is allowed to be moved
if (imageIsAvailableInArray(image))
{
//Make the image the current selected image
selectedUIPanels = image;
dragType = DragType.IMAGES;
moveOffset = selectedUIPanels.transform.position - currentPos;
}
else
{
//Clear the selected Button
selectedUIPanels = null;
dragType = DragType.NONE;
}
}
public void OnBeginDrag(PointerEventData eventData)
{
GameObject tempObj = eventData.pointerCurrentRaycast.gameObject;
if (tempObj == null)
{
return;
}
Button tempButton = tempObj.GetComponent<Button>();
Image tempImage = tempObj.GetComponent<Image>();
Text tempText = tempObj.GetComponent<Text>();
//For Offeset Position
Vector2 pos;
RectTransformUtility.ScreenPointToLocalPointInRectangle(parentCanvasOfImageToMove.transform as RectTransform, eventData.position, parentCanvasOfImageToMove.worldCamera, out pos);
//Button must contain Text then Image and Button as parant
//Check if this is an image
if (tempButton == null || tempImage == null)
{
//Button not detected. Check if Button's text was detected
if (tempText != null)
{
//Text detected. Now Look for Button and Image in the text's parent Object
tempButton = tempText.GetComponentInParent<Button>();
tempImage = tempText.GetComponentInParent<Image>();
//Since child is text, check if parents are Button and Image
if (tempButton != null && tempImage != null)
{
//This is a Button
selectButton(tempButton, parentCanvasOfImageToMove.transform.TransformPoint(pos));
}
//Check if there is just an image
else if (tempImage != null)
{
//This is an Image
selectImage(tempImage, parentCanvasOfImageToMove.transform.TransformPoint(pos));
}
}
else
{
//This is an Image
selectImage(tempImage, parentCanvasOfImageToMove.transform.TransformPoint(pos));
}
}
//Check if there is just an image
else if (tempImage != null)
{
selectImage(tempImage, parentCanvasOfImageToMove.transform.TransformPoint(pos));
}
}
public void OnDrag(PointerEventData eventData)
{
Vector2 pos;
if (dragType == DragType.BUTTONS)
{
RectTransformUtility.ScreenPointToLocalPointInRectangle(parentCanvasOfImageToMove.transform as RectTransform, eventData.position, parentCanvasOfImageToMove.worldCamera, out pos);
selectedButton.transform.position = parentCanvasOfImageToMove.transform.TransformPoint(pos) + moveOffset;
}
else if (dragType == DragType.IMAGES)
{
RectTransformUtility.ScreenPointToLocalPointInRectangle(parentCanvasOfImageToMove.transform as RectTransform, eventData.position, parentCanvasOfImageToMove.worldCamera, out pos);
selectedUIPanels.transform.position = parentCanvasOfImageToMove.transform.TransformPoint(pos) + moveOffset;
}
}
public void OnEndDrag(PointerEventData eventData)
{
//Buttons
if (dragType == DragType.BUTTONS || dragType == DragType.IMAGES)
{
selectedButton = null;
selectedUIPanels = null;
dragType = DragType.NONE;
}
}
DragType getCurrentDragType()
{
return dragType;
}
private enum DragType { NONE, BUTTONS, IMAGES };
}
using UnityEngine.EventSystems;
public class SomeObject : MonoBehaviour, IBeginDragHandler, IDragHandler
{
private Canvas parentCanvas;
private Vector3 moveOffset;
void Start()
{
// get the "nearest Canvas"
parentCanvas = GetComponentsInParent<Canvas>()[0];
// you could get the Camera of this Canvas here as well and like @ina suggests add a null check for that and otherwise use Camera.Main
}
public void OnBeginDrag(PointerEventData eventData)
{
//For Offset Position so the object won't "jump" to the mouse/touch position
RectTransformUtility.ScreenPointToLocalPointInRectangle(parentCanvas.transform as RectTransform, eventData.position, parentCanvas.worldCamera, out Vector2 pos);
moveOffset = transform.position - parentCanvas.transform.TransformPoint(pos);
}
public void OnDrag(PointerEventData eventData)
{
RectTransformUtility.ScreenPointToLocalPointInRectangle(parentCanvas.transform as RectTransform, eventData.position, parentCanvas.worldCamera, out Vector2 pos);
transform.position = parentCanvas.transform.TransformPoint(pos) + moveOffset;
}
}