Swift图像滤镜

Question

对照片的过滤有效，但我遇到了这个问题。

当我运行此代码时：

    public async Task<ActionResult> ResetPassword(ResetPasswordViewModel model)
    {
        // some code here...


       var result = await UserManager.ResetPasswordAsync(user.Id, model.Code, model.Password);
       if (result.Succeeded)
            {
                // Email confirmation of password reset
                await EmailHelper.SendReset(model.Email);

                return RedirectToAction("ResetPasswordConfirmation", "Account");
            }

第一个错误是：

let originalImage = CIImage(image: imageView.image) var filter = CIFilter(name: "CIPhotoEffectMono") filter.setDefaults() filter.setValue(originalImage, forKey: kCIInputImageKey) var newImage = UIImage(CIImage: filter.outputImage) imageView.image = newImage

第二个错误是：

BSXPCMessage received error for message: Connection interrupted

然后应用程序崩溃。

我如何解决它和错误？

Answer 1

试试这个：

let originalImage = CIImage(image: imageView.image)
var filter = CIFilter(name: "CIPhotoEffectMono")
 filter.setValue(originalImage, forKey: kCIInputImageKey)
let context = CIContext(options:nil)
let ouputImage = context.createdCGImage(filter,fromRect:filter.extend())
 var newImage = UIImage(CGImage: ouputImage)
   imageView.image = newImage

Answer 2

您的代码运行正常。当你调用它时，你的图像源imageView.image可能是零。你可以在游乐场试试这个：

Set F = Me.Subform.Form
Set RS = F.RecordsetClone
RS.MoveFirst
' goto first selected record
RS.Move F.SelTop - 1
' loop over all selected records
For i = 1 To F.SelHeight
    ' do something with fields from RS
    RS.MoveNext
Next i

Answer 3

I Found A Solution:

Updated

let originalImage = CIImage(image: imageView.image)
var filter = CIFilter(name: "CIPhotoEffectMono")
filter.setValue(originalImage, forKey: kCIInputImageKey)
let context = CIContext(options: [kCIContextUseSoftwareRenderer: true])
let outputImage = context.createCGImage(filter.outputImage, fromRect: filter.outputImage.extent())
var newImage = UIImage(CGImage: outputImage)
imageView.image = newImage

*Based on Lamar's code.

---

CIContext(options: nil) was causing BSXPCMessage received error for message: Connection interrupted error.

SO replace:

CIContext(options: nil) with CIContext(options: [kCIContextUseSoftwareRenderer: true])

---

Thanks For The Help:

Lamar

The app doesn't crash anymore.

Answer 4

**I have added Black n White Effect To an Image** 

UIGraphicsBeginImageContext(clickedImage.bounds.size)
                clickedImage.layer.renderInContext(UIGraphicsGetCurrentContext())
                var image2: UIImage = UIGraphicsGetImageFromCurrentImageContext()
                UIGraphicsEndImageContext()
                origionalimage=image2;
                var CIfilterName = "CIPhotoEffectTonal"
                let ciContext = CIContext(options: nil)
                let startImage = CIImage(image: image2)
                let filter = CIFilter(name: CIfilterName)
                filter.setDefaults()
                filter.setValue(startImage, forKey: kCIInputImageKey)
                let filteredImageData = filter.valueForKey(kCIOutputImageKey) as! CIImage
                let filteredImageRef = ciContext.createCGImage(filteredImageData, fromRect: filteredImageData.extent())
                var newImage = UIImage(CGImage: filteredImageRef)!
                self.mediaData = UIImagePNGRepresentation(newImage )
                self.videoThumbData = UIImageJPEGRepresentation(image2, 0.1)
                self.clickedImage.image = newImage;