Question

我尝试使用以下代码行创建一个颜色过滤器

let parameters = [kCIInputColorKey: CIColor(string: "0.5 0.7 0.3 1.0")]
let colorFilter = CIFilter(name: "CIConstantColorGenerator",    withInputParameters: parameters)
colorFilter?.outputImage

但调试控制台输出滚动信息

 <Error>: CGImageProviderCreate: invalid image provider size: 1.79769e+308 x 1.79769e+308.
<Error>: CGImageCreate: invalid image width.
<Error>: ImageIO: CGImageDestinationFinalize image destination must have at least one image
CGImageDestinationFinalize failed for output type 'public.tiff'

谢谢，加：我试着在Swift Project中编写这个代码，它运行正常，但在操场上工作时，只显示了这个错误

Answer 1

尝试澄清您想要获得的输出图像大小： colorFilter?.outputImage?.imageByCroppingToRect(CGRectMake(0, 0, 200, 200))

CIConstantColorGenerator CIFilter在Playground with Swift 2.0中失败并出现错误

1 个答案: