如何从SKSpriteNode或SKTexture获取像素颜色？
问题描述：
我希望在游戏地图上精确选择我的对象。对象是一个精灵，周围有一些透明像素，我想测试这些透明像素的触摸位置。
任何线索？
I want to get precise selection of my object on game map. Object is a sprite with which has some transparent pixels around and I want to test touch location for these transparent pixels. Any clue?
答
在Sprite Kit中，您无权访问纹理数据。
In Sprite Kit you don't have access to texture data.
相反，你必须从图像中创建一个位掩码，例如将图像加载为UIImage或CGImage并扫描所有非透明像素。
Instead you'd have to create a bit mask from the image, for example by loading the image as UIImage or CGImage and scanning for all non-transparent pixels.