现在已经在swift上工作了一段时间,并且在处理此Core Image Framework时遇到了问题。我能够在图像上成功创建CIFilter,但我不确定如何删除它。图像被放置在类似于snapchat的相机屏幕的UIView上,然后有一个imageview,它是图像被预览的uiview的子视图。顺便说一下,使用最新的Xcode和iOS版本。Swift无法从UIImage中删除CIFIlter
这里是当应用黑白过滤器的代码:
@IBAction func BW_Flt_Bt_Tapped(sender: UIButton) {
let beginImage = CIImage(image: imagePreview.image!)
let ciContext = CIContext(options: nil)
let filter = CIFilter(name: "CIPhotoEffectNoir")
var imgOrientation = imagePreview.image!.imageOrientation
var imgScale = imagePreview.image?.scale
filter!.setDefaults()
filter!.setValue(beginImage, forKey: kCIInputImageKey)
let filteredImageData = filter!.valueForKey(kCIOutputImageKey) as! CIImage
let filteredImageRef = ciContext.createCGImage(filteredImageData, fromRect: filteredImageData.extent)
imagePreview.image = UIImage(CGImage: filteredImageRef, scale: 1.0, orientation: UIImageOrientation.Right)
self.orgImgBt.hidden = false
self.orgImgL.hidden = false
BWFlt.hidden = true
BWLbl.hidden = true
}
-imagePreview是的UIView的子视图
接下来是我如何将图像改回
代码@IBAction func orgImgPressed(sender: UIButton) {
self.imagePreview.image = self.selctedImage
orgImgBt.hidden = true
orgImgL.hidden = true
`enter code here` BWFlt.hidden = false
`enter code here`BWLbl.hidden = false
print("button was pressed")
}
如果有人有任何建议,我会非常感激,谢谢!
什么是self.selectedImage? – beyowulf