游戏主场景
1 场景的来回切换
通过2个场景，来回播放实现
前一个场景完全移除屏幕后，立刻重新设置坐标，并且让柱子的位置随机出现
// mapMove.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class mapMove : MonoBehaviour {
public float speed = 300f;
public RectTransform tube1;
public RectTransform tube2;
private RectTransform transform;
// Use this for initialization
void Awake () {
transform = GetComponent<RectTransform>();
}
// Update is called once per frame
void Update () {
// Translate：Moves the transform in the direction and distance of translation.
// If you add or subtract to a value every frame chances are you should multiply with Time.deltaTime.
// When you multiply with Time.deltaTime you essentially express:
// I want to move this object 10 meters per second instead of 10 meters per frame.
transform.Translate (Vector3.left * Time.deltaTime * speed);
// 如果前一个地图移到-764以外的地方，重放到764
if (transform.anchoredPosition.x <= -764) {
transform.anchoredPosition = new Vector2 (764, 0);
// 设置水管的位置为随机出现，x不变，y随机出现
tube1.anchoredPosition = new Vector2 (tube1.anchoredPosition.x, Random.Range (-110, 200));
tube2.anchoredPosition = new Vector2 (tube2.anchoredPosition.x, Random.Range (-110, 200));
}
}
}
2 主要是鸟和柱子接触后产生的碰撞检测，首先需要设置鸟和柱子都为is Trigger触发器，因为这里不需要物理的碰撞效果
提前给所有柱子和上下面设置好tag，通过tag检测碰撞，停止移动地图并销毁鸟
// 碰撞检测
void OnTriggerEnter2D (Collider2D other)
{
// 如果鸟碰到柱子
if (other.gameObject.CompareTag("tube")) {
if (!gameOver.activeSelf) {
gameOver.SetActive (true);
audioManager.singer.setAudio (audioClipType.hit);
}
// 通过地图的名字获取到地图移动
