CGBitmapContextCreate警告

Question

CGColorSpaceRef colorSpace = CGImageGetColorSpace([UIImage imageNamed:@"shirtWhite.jpeg"]); 
    CGContextRef context = CGBitmapContextCreate (nil,
                                                  width,
                                                  height,
                                                  CGImageGetBitsPerComponent(imageToTest.image),
                                                  CGImageGetBytesPerRow(imageToTest.image),
                                                  colorSpace,
                                                  CGImageGetAlphaInfo(imageToTest.image));

I got the warning on each line where I am passing the image. The warning is " warning: passing argument 1 of 'CGImageGetColorSpace' from incompatible pointer type

warning: passing argument 1 of 'CGImageGetBitsPerComponent' from incompatible pointer type

"

Answer 1

解决：传递CGImage而不是图像