在项目中我们会用到将截取的图片保存到本地，然后在本界面或者是其他界面中显示出来。
void Start()
{
PhotoButtonClick();
}
/// <summary>
/// 拍照按钮的功能实现
/// </summary>
private void PhotoButtonClick()
{
string fName = DateTime.Now.ToString("yyyyMMddHHmmss") + ".png";//用时间作为图片的名称，保证唯一性
PlayerPrefs.SetString("photoName", fName);//将名字存储，为了方便获取
StartCoroutine(UploadPNG(fName));
}
/// <summary>
/// 截取图片
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
private IEnumerator UploadPNG(string fileName)
{
yield return new WaitForEndOfFrame();
// U3D 截图
int width = Screen.width;
int height = Screen.height;
Texture2D tex = new Texture2D(width, height, TextureFormat.RGB24, false);
tex.ReadPixels(new Rect(0, 0, width, height), 0, 0);
tex.Apply();
byte[] bytes = tex.EncodeToPNG();
GameObject.Destroy(tex);
string path = PathForFile(fileName);//移动平台的判断
SaveNativeFile(bytes, path);//保存图片到本地
}
/// <summary>
/// 判断平台
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
public string PathForFile(string filename)
{
if (Application.platform == RuntimePlatform.IPhonePlayer)
{
string path = Application.persistentDataPath.Substring(0, Application.persistentDataPath.Length - 5);
path = path.Substring(0, path.LastIndexOf('/'));
return Path.Combine(Path.Combine(path, "Documents"), filename);
}
else if (Application.platform == RuntimePlatform.Android)
{
string path = Application.persistentDataPath;
path = path.Substring(0, path.LastIndexOf('/'));
return Path.Combine(path, filename);
}
else {
string path = Application.dataPath;
path = path.Substring(0, path.LastIndexOf('/'));
return Path.Combine(path, filename);
}
}
/// <summary>
/// 在本地保存文件
/// </summary>
/// <param name="bytes"></param>
/// <param name="path"></param>
public void SaveNativeFile(byte[] bytes, string path)
{
FileStream fs = new FileStream(path, FileMode.Create);
fs.Write(bytes, 0, bytes.Length);
fs.Flush();
fs.Close();
}
//上述是保存在移动平台的代码，下面则是读取到移动平台的图片
/// <summary>
/// 显示图片
/// </summary>
public void ShowNativeTexture()
{
string name = PlayerPrefs.GetString("photoName");
var filePath = DecidePlatforms._Instance.PathForFile(name);
photoTexture.texture=GetNativeFile(filePath);
}
/// <summary>
/// 获取到本地的图片
/// </summary>
/// <param name="path"></param>
public Texture2D GetNativeFile(string path)
{
try
{
var pathName = path;
var bytes = ReadFile(pathName);
int width = Screen.width;
int height = Screen.height;
var texture = new Texture2D(width,height);
texture.LoadImage(bytes);
return texture;
}
catch (Exception c)
{
}
return null;
}
public byte[] ReadFile(string filePath)
{
var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
fs.Seek(0, SeekOrigin.Begin);
var binary = new byte[fs.Length];
fs.Read(binary, 0, binary.Length);
fs.Close();
return binary;
}
//这是读取的代码，为什么这样写而不用www方法，是因为用www方法在ios下写不了图片的信息。所以采用了这种方法，当然如果那位大神实现了请不吝赐教。