我正在开发一个照片滤镜应用程序,正如你所看到的,我添加了一个功能来调整对比度、亮度、饱和度和噪音。但问题是它们是独立工作的,这意味着当我开始编辑对比度时调整亮度时,它会返回到原始亮度。
这是当我将亮度设置为最大(图像变白)然后尝试调整其对比度并且滑块更改原始图像的对比度时的预览。
在这里,我能够捕捉到释放滑块并将其值放在原始图像上的时刻,正如您所看到的,它起作用了,在演示中我将饱和度设置为 0,然后将相同饱和度的图片的对比度更改为 0。
.
问题是,现在当我单击滑块而不更改其值时,它会使当前值翻倍。例如,如果我将亮度设置为 5,将饱和度设置为 10,并决定在单击亮度时立即调整亮度,它的值会加倍,我不知道为什么。
这是一个例子。我只是单击滑块而不更改其值。
这是代码
@objc func sliderValueDidChange(_ sender: UISlider!) {
if sender.tag == 0 {
let displayinPercentage: Int = Int((sender.value/200) * 10000)
brightnessValueLabel.text = ("\(displayinPercentage)")
selectedPictureImageView.image = originalImage
let beginImage = CIImage(image: selectedPictureImageView.image!)
self.filter = CIFilter(name: "CIColorControls")
self.filter?.setValue(beginImage, forKey: kCIInputImageKey)
self.filter.setValue(sender.value, forKey: kCIInputBrightnessKey)
self.filteredImage = self.filter?.outputImage
selectedPictureImageView.image = UIImage(cgImage: self.context.createCGImage(self.filteredImage!, from: (self.filteredImage?.extent)!)!)
sliderValue = sender.value
} else if sender.tag == 1 {
let displayinPercentage: Int = Int((sender.value/200) * 10000)
contrastValueLabel.text = ("\(displayinPercentage)")
self.selectedPictureImageView.image = originalImage
let beginImage = CIImage(image: self.selectedPictureImageView.image!)
self.filter = CIFilter(name: "CIColorControls")
self.filter?.setValue(beginImage, forKey: kCIInputImageKey)
self.filter.setValue(sender.value, forKey: kCIInputContrastKey)
self.filteredImage = self.filter?.outputImage
self.selectedPictureImageView.image = UIImage(cgImage: self.context.createCGImage(self.filteredImage!, from: (self.filteredImage?.extent)!)!)
sliderValue = sender.value
} else if sender.tag == 2 {
let displayinPercentage: Int = Int((sender.value/200) * 10000)
saturationValueLabel.text = ("\(displayinPercentage)")
self.selectedPictureImageView.image = originalImage
let beginImage = CIImage(image: self.selectedPictureImageView.image!)
self.filter = CIFilter(name: "CIColorControls")
self.filter?.setValue(beginImage, forKey: kCIInputImageKey)
self.filter.setValue(sender.value, forKey: kCIInputSaturationKey)
self.filteredImage = self.filter?.outputImage
self.selectedPictureImageView.image = UIImage(cgImage: self.context.createCGImage(self.filteredImage!, from: (self.filteredImage?.extent)!)!)
sliderValue = sender.value
} else if sender.tag == 3 {
let displayinPercentage: Int = Int((sender.value/200) * 10000)
sharpenValueLabel.text = ("\(displayinPercentage)")
self.selectedPictureImageView.image = originalImage
let beginImage = CIImage(image: self.selectedPictureImageView.image!)
self.filter = CIFilter(name: "CIUnsharpMask")
self.filter?.setValue(beginImage, forKey: kCIInputImageKey)
self.filter.setValue(7, forKey: kCIInputRadiusKey)
self.filter.setValue(sender.value, forKey: kCIInputIntensityKey)
self.filteredImage = self.filter?.outputImage
self.selectedPictureImageView.image = UIImage(cgImage: self.context.createCGImage(self.filteredImage!, from: (self.filteredImage?.extent)!)!)
sliderValue = sender.value
}
}
@objc func sliderValueDidEnd(_ sender: UISlider!) {
if sender.tag == 0 {
originalImage = selectedPictureImageView.image
sender.value = sliderValue
print("Unpressed button slider value is \(sender.value)")
} else if sender.tag == 1 {
originalImage = selectedPictureImageView.image
sender.value = sliderValue
print("Unpressed button slider value is \(sender.value)")
} else if sender.tag == 2 {
originalImage = selectedPictureImageView.image
sender.value = sliderValue
print("Unpressed button slider value is \(sender.value)")
} else if sender.tag == 3 {
originalImage = selectedPictureImageView.image
sender.value = sliderValue
print("Unpressed button slider value is \(sender.value)")
}
}
我认为一切正常,我只是对过滤器值进行了错误的计算。