在imageview上应用滤镜后无法获得原始图像。我想在将滑块从1移动到0(最大值到最小值,我的意思是反向方向)。 下面是应用锐度效果在使用清晰度滤镜后Imageview未复位为原始图像
- (IBAction)actionSharp:(UISlider *)sender {
demoImage = _affectView.image;
CIImage* image = [CIImage imageWithCGImage:demoImage.CGImage];
CIContext *context = [CIContext contextWithOptions:nil];
NSNumber *testNSNumber = [NSNumber numberWithFloat:_sharpActionWithSlider.value];
NSLog(@"ffghhn %f",_sharpActionWithSlider.value);
CIFilter *gaussianBlurFilter = [CIFilter filterWithName:@"CISharpenLuminance" keysAndValues: @"inputImage", image, nil];
[gaussianBlurFilter setDefaults];
[gaussianBlurFilter setValue:testNSNumber forKey:kCIInputSharpnessKey];
[gaussianBlurFilter setDefaults];
CIImage *result2 = [gaussianBlurFilter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result2 fromRect:[result2 extent]];
UIImage *sharp= [UIImage imageWithCGImage:cgImage];
UIImage *p = sharp;
self.affectView.image= p;
self.affectView.alpha = sender.value;
CGImageRelease(cgImage);
}
每次您从self.affectView.image获取图像并为其分配新图像时,因此,每次你得到新的图像,而不是原始图像。您需要为原始图片添加效果,而不是更新后的图片。我为您的引荐添加了回复。 – luckyShubhra