Touch.phase

Описание

Describes the phase of the touch.

The touch phase refers to the action the finger has taken on the most recent frame update. Since a touch is tracked over its "lifetime" by the device, the start and end of a touch and movements in between can be reported on the frames they occur. The phase property can be used as the basis of a "switch' statement or as part of a more sophisitcated state handling system.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
	public Vector2 startPos;
	public Vector2 direction;
	public bool directionChosen;
	void Update() {
		// Track a single touch as a direction control.
		if (Input.touchCount > 0) {
			Touch touch = Input.GetTouch(0);
			
			// Handle finger movements based on touch phase.
			switch (touch.phase) {
				// Record initial touch position.
				case TouchPhase.Began:
					startPos = touch.position;
					directionChosen = false;
					break;
				
				// Determine direction by comparing the current touch position with the initial one.
				case TouchPhase.Moved:
					direction = touch.position - startPos;
					break;
				
				// Report that a direction has been chosen when the finger is lifted.
				case TouchPhase.Ended:
					directionChosen = true;
					break;
			}
		}
		if (directionChosen) {
			// Something that uses the chosen direction...
		}
	}
}