# 使用单例模式，DontDestroyOnLoad (go);  对象保存信息

```csharp
using UnityEngine;
using System.Collections;

// 对象数据想被跨场景后保存，只能采用，DontDestroyOnLoad (go); 方法保存数据，数据保存在堆中
// 拖入场景多个，但是只有一个起作用
public class C : MonoBehaviour {
  public int age;
  private C(){
  }
  private static C _instance;
  /// <summary>
  /// Gets the instance.
  /// </summary>
  /// <returns>The instance.</returns>
  public static C GetInstance(){
    GameObject g = GameObject.Find ("InstanceC");
    if (g == null) {
      GameObject go = new GameObject ();
      go.name = "InstanceC";
      DontDestroyOnLoad (go);
      if (_instance == null) {
        if (go.GetComponent<C> () == null) {
          // 通过脚本 自动添加对象，必须先实例化，否则是空，无法保存信息，没有申请空间
           _instance = new C ();
          go.AddComponent<C> ();
        }
      } else {
        return _instance;
      }
    }
    return _instance;
  }
  // Use this for initialization
  void Start () { }

  // Update is called once per frame
  void Update () { }
}

使用静态字段

using UnityEngine;
using System.Collections;

// 继承 MONO 和不继承数据保存没区别，只是差在，能否拖入场景
// 手动拖入场景相当与做了实例化
// 即使手动拖入场景多个，单只有一个静态字段是有作用，对象数据是用多个的
public class G :MonoBehaviour {
  // 静态的是全局的，和对象没有关系；即使跨场景数据也会保存，静态数据是保存在类的，在静态区
  // 静态数据在面板显示不出来的  public static int m;
     // 对象数据，有对象才能保存对应的数据；
  G g ;
  // Use this for initialization
  void Start () {
    C.GetInstance ();
           C.GetInstance ().age = 90;

    G.m = 1000;
     g = GetComponent<G> ();
    g.Z = 100;
  }
}

使用 PlayerPrefs

using UnityEngine;
using System.Collections;
using UnityEngine.SceneManagement;

public class D : MonoBehaviour {
  C cc;
  G g ;
  // Use this for initialization
  void Start () {
    C.GetInstance ();
           C.GetInstance ().age = 90;

    G.m = 1000;
     g = GetComponent<G> ();
    g.Z = 100;

    PlayerPrefs.SetFloat("hight",10.5f);
    PlayerPrefs.SetInt ("age", 100);
    PlayerPrefs.SetString ("name", "xixi");
  }

  // Update is called once per frame
  void Update () { }
  public void OnBtnClick() {
    SceneManager.LoadScene ("2");
  }
}

using UnityEngine;
using System.Collections;
using UnityEngine.SceneManagement;

public class E : MonoBehaviour {
  public static int m;
  G g ;
  // Use this for initialization
  void Start () {
    C.GetInstance ();
     g = GetComponent<G> ();

    int age= PlayerPrefs.GetInt ("age");
    float hight =PlayerPrefs.GetFloat ("hight", 0f);
    string name = PlayerPrefs.GetString ("name");
  }

  // Update is called once per frame
  void Update () { }
  public void OnBtnClick() {
    SceneManager.LoadScene ("1");
  }
}