如何将 SKSpriteNode 作为 PNG 图像保存到相机胶卷?
问题描述：
我正在尝试将 SKSpriteNode 转换为具有透明度的 PNG 图像到相机胶卷.
I'm trying to convert SKSpriteNode as a PNG image with transparency to Camera Roll.
这会保存图像但不具有透明度:
This saves the image but not with transparency:
let image = UIImage(cgImage: (spriteNode.texture?.cgImage())!)
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)
这抱怨:
无法转换数据"类型的值?到预期的参数类型 'UIImage'
Cannot convert value of type 'Data?' to expected argument type 'UIImage'
let image = UIImage(cgImage: (createdCloudShadow.texture?.cgImage())!)
let image2 = UIImagePNGRepresentation(image)
UIImageWriteToSavedPhotosAlbum(image2, nil, nil, nil)
如何将 SKSpriteNode 保存为 PNG 到相机胶卷?
How can I save SKSpriteNode as PNG to camera Roll?
答
UIImagePNGRepresentation(_:) 函数返回 Data? 从文档.
所以你可能只需要重写如下:
So you probably just need to rewrite as follows:
let image = UIImage(cgImage: (createdCloudShadow.texture?.cgImage())!)
let imData = UIImagePNGRepresentation(image)
let image2 = UIImage(data: imData)
UIImageWriteToSavedPhotosAlbum(image2, nil, nil, nil)