iOS中UIImage可以转换为CIImage, UIImage有个属性为ciimage,然而在实际运用中,UIImage对象不为空,但UIImage.ciimage却为空,这是为何?
如下所示代码返回为空:
UIImage *image = [UIImage imageNamed:@"test.jpg"];
CIImage *ciImage = image.CIImage
如果用这种方式CIImage就不为空:
UIImage *image = [UIImage imageNamed:@"test.jpg"];
CIImage *myImage = [[CIImage alloc] initWithCGImage:image.CGImage options:nil];