TouchPhase

描述

描述手指触控的阶段。

TouchPhase 是一个枚举类型，包含可能的指触状态。这些状态表示手指在最近一帧更新中可以执行的每个操作。由于设备会跟踪触控的“生命周期”，因此可以在触控发生的那一帧报告触控的开始和结束以及之间的移动。

//Attach this script to an empty GameObject
//Create some UI Text by going to Create>UI>Text.
//Drag this GameObject into the Text field to the Inspector window of your GameObject.

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class TouchPhaseExample : MonoBehaviour
{
    public Vector2 startPos;
    public Vector2 direction;

    public Text m_Text;
    string message;

    void Update()
    {
        //Update the Text on the screen depending on current TouchPhase, and the current direction vector
        m_Text.text = "Touch : " + message + "in direction" + direction;

        // Track a single touch as a direction control.
        if (Input.touchCount > 0)
        {
            Touch touch = Input.GetTouch(0);

            // Handle finger movements based on TouchPhase
            switch (touch.phase)
            {
                //When a touch has first been detected, change the message and record the starting position
                case TouchPhase.Began:
                    // Record initial touch position.
                    startPos = touch.position;
                    message = "Begun ";
                    break;

                //Determine if the touch is a moving touch
                case TouchPhase.Moved:
                    // Determine direction by comparing the current touch position with the initial one
                    direction = touch.position - startPos;
                    message = "Moving ";
                    break;

                case TouchPhase.Ended:
                    // Report that the touch has ended when it ends
                    message = "Ending ";
                    break;
            }
        }
    }
}

属性