我在做一个应用程序“照片编辑器”。 我是初学者迅速。 我有我的滑块的一个问题。 因为我需要他们不工作。 可能有人知道,我怎么能解决这个问题呢?
滑块无法正常工作,我需要用它帮助。 我不知道,为什么它的工作这样。
import UIKit
class ViewControllerFilters: UIViewController {
@IBOutlet weak var imageView: UIImageView!
var image: UIImage? = nil
var filter = CIFilter(name: "CISepiaTone")
var filteredImage: CIImage? = nil
@IBOutlet weak var slider: UISlider!
let context = CIContext()
@IBOutlet weak var slider2: UISlider!
@IBOutlet weak var slider3: UISlider!
@IBOutlet weak var slider4: UISlider!
override func viewDidLoad() {
super.viewDidLoad()
self.imageView.image = image
self.slider.addTarget(self, action: #selector(sliderValueDidChange(sender:)), for: .valueChanged )
self.slider2.addTarget(self, action: #selector(sliderValueDidChange(sender:)), for: .valueChanged)
self.slider3.addTarget(self, action: #selector(sliderValueDidChange(sender:)), for: .valueChanged)
self.slider4.addTarget(self, action: #selector(sliderValueDidChange(sender:)), for: .valueChanged)
}
let colorControlsFilter = CIFilter(name: "CIColorControls")!
let sepiaFilter = CIFilter(name:"CISepiaTone")!
let sharp = CIFilter(name: "CISharpenLuminance")!
@objc func sliderValueDidChange(sender: UISlider!) {
switch sender.tag {
case 0:
let value = sender.value
self.sharp.setValue(value, forKey: kCIInputSharpnessKey)
case 1:
let value = sender.value
self.colorControlsFilter.setValue(value, forKey: kCIInputBrightnessKey)
case 2:
let value = sender.value
self.colorControlsFilter.setValue(value, forKey: kCIInputContrastKey)
case 3:
let value = sender.value
self.colorControlsFilter.setValue(value, forKey: kCIInputSaturationKey)
default:
print("no such elements")
}
self.updateImage()
}
func updateImage() {
let originalCIImage = CIImage(image: self.image!)
self.colorControlsFilter.setValue(originalCIImage, forKey: kCIInputImageKey)
self.sharp.setValue(self.colorControlsFilter.outputImage, forKey: kCIInputImageKey)
self.imageView.image = UIImage(ciImage: self.sharp.outputImage!)
}
我需要一个平滑移动我的滑块,因为这是不可能与它合作。