ios 屏幕截图

 

    // 高斯模糊

    CIContext *context = [CIContext contextWithOptions:nil];

    CIImage *inputImage = [[CIImage alloc] initWithImage:image];

    CIFilter *filter = [CIFilter filterWithName:@"CIGaussianBlur"];

    [filter setValue:inputImage forKey:kCIInputImageKey];

    [filter setValue:@2.0f forKey: @"inputRadius"];

    CIImage *result = [filter valueForKey:kCIOutputImageKey];

    CGImageRef outImage = [context createCGImage: result fromRect:[result extent]];

    UIImage *blurImage = [UIImage imageWithCGImage:outImage];

    CGImageRelease(outImage);