闲话少说，上代码，google上搜来的代码，不过里面有bug，不能顺利切换，下面的代码是已经修改过的，经测试，可以正常运行。

using System; using UnityEngine; using System.IO; using System.Collections;

public class NewBehaviourScript : MonoBehaviour {

//public GUITexture mytext;public UITexture mytext;

private WebCamTexture frontWebcamTexture = null;

private WebCamTexture rearWebcamTexture = null;

private WebCamDevice[] devices;

[HideInInspector]public WebCamTexture activeCam;

bool flag = false ;

static int cameraIndex = 0 ;

/ 按钮控件 /

public GameObject btn_shot ;public GameObject btn_change_camera ;

void Awake () {

for( int i = 0 ; i < WebCamTexture.devices.Length ; i++ )

NGUIDebug.Log(WebCamTexture.devices[i].name);

devices = WebCamTexture.devices;

string frontCamName = "";

string rearCamName = "";

for(int i=0; i{

if (devices[i].isFrontFacing)

frontCamName = devices[i].name;

else

rearCamName = devices[i].name;

}

frontWebcamTexture = new WebCamTexture(frontCamName);

rearWebcamTexture = new WebCamTexture(rearCamName);

frontWebcamTexture.Stop();

rearWebcamTexture.Stop();activeCam = rearWebcamTexture;//mytext.material.mainTexture = rearWebcamTexture ;mytext.material.SetTexture("_MainTex", rearWebcamTexture);

activeCam.Play();

}

void Start()

{

/ 事件 /

UIEventListener.Get(btn_shot).onClick += OnShotButtonClick ;UIEventListener.Get(btn_change_camera).onClick += OnCameraChangeClick ;

NGUIDebug.Log ("Active camera: " + activeCam);

}

public bool HasFrontCamera()

{

if (Application.isEditor)

return false;

return frontWebcamTexture.deviceName != "";

}

public void OnShotButtonClick (GameObject go) {

SavePhoto() ;}

/ 相机切换 /

public void OnCameraChangeClick (GameObject go) {

if (!HasFrontCamera())

return;

activeCam.Stop ();

if (activeCam == frontWebcamTexture)

{

NGUIDebug.Log ("Switching to rear cam...");

//renderer.material.mainTexture = rearWebcamTexture;

//mytext.material.mainTexture = rearWebcamTexture ;mytext.material.SetTexture("_MainTex", rearWebcamTexture);activeCam = rearWebcamTexture;

}

else

{

NGUIDebug.Log ("Switching to front cam...");

//mytext.material.mainTexture = frontWebcamTexture ;

mytext.material.SetTexture("_MainTex", frontWebcamTexture);

activeCam = frontWebcamTexture;

}

NGUIDebug.Log ("... done.");

NGUIDebug.Log("Trying to Play the active WebCamTexture: (" + activeCam + ")");

activeCam.Play();

}

public void ShowCamera()

{ //myCameraTexture.guiTexture.enabled = true;mytext.enabled = true;activeCam.Play();NGUIDebug.Log("-------------show--------->>>>>" + mytext) ;

}

public void HideCamera()

{ NGUIDebug.Log("-------------hide--------->>>>>" + mytext) ;//myCameraTexture.guiTexture.enabled = false;mytext.enabled = false;activeCam.Stop();

}

public void SavePhoto() {

NGUIDebug.Log("oh finally worked!!!") ;

Texture tex = mytext.material.mainTexture;

Texture2D tx = new Texture2D(activeCam.width, activeCam.height) ;

tx.SetPixels(activeCam.GetPixels());

byte[] byte_photo = tx.EncodeToPNG() ;

NGUIDebug.Log("#####length######################333333" + byte_photo.Length) ;string photoName = "nimei.png" ;

FileStream fs = new System.IO.FileStream("/mnt/sdcard/DCIM/Camera/nimei.png", System.IO.FileMode.Create);

fs.Write(byte_photo,0,byte_photo.Length);fs.Close();}

}

更多unity2018的功能介绍请到paws3d爪爪学院查找。