unity中实现截取全屏的功能
1、截屏方法如下：
///
/// 读取指定相机渲染的像素—本次使用的
///
private void ScreenShot_ReadPixelsWithCamera(Camera _camera)
{
//对指定相机进行 RenderTexture
RenderTexture renTex = new RenderTexture(Screen.width, Screen.height, 16);
_camera.targetTexture = renTex;
_camera.Render();
RenderTexture.active = renTex;
//读取像素
Texture2D tex = new Texture2D(Screen.width, Screen.height);
tex.ReadPixels(new Rect(0, 0, tex.width, tex.height), 0, 0);
tex.Apply();
PictureList.Add(tex);//这一步是我需要，存储了一下截屏的图片，可以省去
MyRectTransform.GetComponent().sprite = ToSprite(tex);
//读取目标相机像素结束，渲染恢复原先的方式
_camera.targetTexture = null;
RenderTexture.active = null;
Destroy(renTex);
}
2、 将texture转换为sprite
///
/// 将texture转换为sprite
///
///
///
public Sprite ToSprite(Texture2D self)
{
var rect = new Rect(0, 0, self.width, self.height);
var pivot = Vector2.one * 0.5f;
var newSprite = Sprite.Create(self, rect, pivot);
return newSprite;
}
3、调用截屏方法即可：
private void JiepingButtonClick()
{
ScreenShot_ReadPixelsWithCamera(Camera.main);
}
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