Unity Android触摸控制不工作- 2D

Question

我有这个脚本，我创建检测向上和向下滑动。它所需要做的就是改变UI文本。

脚本如下:

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
public class TouchControls : MonoBehaviour 
{
    private Vector2 startPos;
    Text instruction;
    void start() {
        instruction = GetComponent<Text>();
    }
    float swipeValue = 0.0f;
    void Update()
    {
        #if UNITY_ANDROID
        if (Input.touchCount > 0){
                Touch touch = Input.touches[0];
                if(touch.phase == TouchPhase.Began){
                    startPos = touch.position;
                }
                else if(touch.phase == TouchPhase.Ended){
                    swipeValue = Mathf.Sign(touch.position.y - startPos.y);
                    if (swipeValue > 0){//up swipe
                        instruction.text="UP";
                    }   
                    else if (swipeValue < 0){//down swipe
                        instruction.text="DOWN";
                    }
                }
            }
        #endif
        }
    }

它不工作，我不明白为什么?请帮忙好吗?

Answer 1

只是为了确保，你是在实际设备上还是在编辑器中测试触摸?代码应该在设备上工作，但据我所知，在编辑器中不会这样做。
您需要使用
检查输入Input.GetMouseButtonUp(0); //returns true if the button has been released
Input.GetMouseButtonDown(0); //returns true if the button has been pressed
和
Vector3 touch = Input.mousePosition; //returns the mouse position
。

Answer 2

这是我在Unity 5.1.1版本管理的问题的解决方案

void Update () {
        #if UNITY_IOS || UNITY_ANDROID
        //iOS Controls (same as Android because they both deal with screen touches)
        //if the touch count on the screen is higher than 0, then we allow stuff to happen to control the player.
                if(Input.touchCount > 0){
                    foreach(Touch touch1 in Input.touches) {
                        if (touch1.phase == TouchPhase.Began) {
                            firstPosition = touch1.position;
                            lastPosition = touch1.position;
                        }
                        if (touch1.phase == TouchPhase.Moved) {
                            lastPosition = touch1.position;
                        }
                        if (touch1.phase == TouchPhase.Ended) {             
                            if (firstPosition.y - lastPosition.y < -80) {
                                //Up
                            }  else {
                                //Down
                            }
                        }   
                    }
            #endif