问题
For my game I am trying to create custom textures from two other textures. This is to allow for a varietly of colours, etc in my sprites.
To do this, I'm creating a sprite by adding both textures together, then applying this to a new SKTexture by using
SKTexture *texture = [self.view textureFromNode:newSprite];
This works great on the whole and I get a nice custom texture. Except when trying my game on Retina devices, where the texture is the correct size on the screen, but clearly a lower resolution.
The textures are all there and properly named so I don't believe that that is an issue.
Has anyone encountered this, or know how I can create the proper @2x texture?
回答1:
I finally (accidentally) figured out how to fix this. The node which you are creating a texture from has to be added to the scene. Otherwise you will get a non-retina size for your texture.
It's not ideal as it would be nice to create textures without having to add them onto the screen.
回答2:
I've discovered another way of improving the fidelity of textures created from ShapeNodes, not quite related to this question - but useful intel.
Create your shape at x2 its size and width. Create all the fonts and other shapes at the same oversized ratio. Make sure your positioning is relative to this overall size, (e.g. don't use absolute sizes, use relative sizes to the container.)
When you create the texture as a sprite it'll be huge - but then apply
sprite.scale = 0.5; // if you were using 2x
I've found this makes it look much higher resolution, no graininess, no fuzziness on fonts, sharp corners.
I also used tex.filteringMode = SKTextureFilteringNearest;
Thus: it doesn't have to be added to the scene and then removed.
来源：https://stackoverflow.com/questions/20837473/sprite-kit-low-resolution-texture-on-retina-when-using-texturefromnode