Unity 跨场景数据传输

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

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 () {

}

}

2.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；
public int Z;
// Use this for initialization
void Start () {

}

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

}

}

3.使用 PlayerPrefs 保存数据

场景1 set;

PlayerPrefs.SetFloat("hight",10.5f);
PlayerPrefs.SetInt ("age", 100);

PlayerPrefs.SetString ("name", "xixi");

场景2 get

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

场景1中对数据赋值：

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 () {
//Debug.Log (C.GetInstance ().age);
//Debug.Log (G.m);
//Debug.Log (g.Z);
}
public void OnBtnClick() {
SceneManager.LoadScene ("2");
}

}

场景2中对数据取值测试

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> ();
//g.Z = 100;

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

// Update is called once per frame
void Update () {
//Debug.Log (C.GetInstance().age);
Debug.Log (G.m);
//Debug.Log (g.Z);
}
public void OnBtnClick() {
SceneManager.LoadScene ("1");
}

}

Unity 跨场景数据传输

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