I have an iMessage app that displays some remote content using SDWebImage. The images are downloaded and cached on disk. After choosing an image, I want to attach it to the message as a plain UIImage (not a MSMessage).
Here's the code I'm using
// image is already downloaded
let cache = SDImageCache.shared()
let key = remoteImageUrl
let fileUrlString = cache.defaultCachePath(forKey: key)!
let fileUrl = URL(string: fileUrlString)!
// image holds the correct UIImage
let image = UIImage(contentsOfFile: fileUrlString)
activeConversation?.insertAttachment(fileUrl, withAlternateFilename: "a funny gif", completionHandler: { (error) in
// error is nil here
print("error: \(error)")
})
Here's what the message looks like
It seems like the Messages framework can't find the image at that path.
Note: after tapping send, I the iMessage app crashes "MobileSMS quit unexpectedly."
I found out that I needed to use
let fileUrl = URL(fileURLWithPath: fileUrlString)
Hope this helps someone else
Related
I'm using SDWebImages library to get image for thumbnails. It is working seemlesly.
However when I navigate from video to a controller where I play video, I need to show thumbnail once again. I need an image path to pass to the player.
The problem is if I pass the same URL the player will download the image once again. In order to avoid this behaviour i'm trying to get the image from disc which is already stored there by sdwebimages library.
/// get thumbnail from cache
var thumbnail: String?
if (video?.hasThumbnail) {
let urlString = "https://test.com/image/001.png"
if let path = SDImageCache.shared.cachePath(forKey: urlString) {
thumbnail = path
} else {
thumbnail = urlString
}
}
This is working on a simulator, but NOT on the real device.
Please read more about how to use
imageView.sd_setImage(with: URL(string: "http://www.example.com/path/to/image.jpg"), placeholderImage: UIImage(named: "placeholder.png"))
I have one JSON which contain path of images from one local folder of Project as Followed
The issue is i want to get image from that path, How do i achieve it?
I had try to convert String to URL and set URL as Image using Kingfisher Library
let url = URL(string: "/VWiOSProjects/CollageMakerDemo/Development/CollageMaker/CollageMaker/Goodies.xcassets/Goodies-1.imageset/Goodies-1.png")!
cell.imgTool.kf.setImage(with: url)
But it don't work I had Tried this one also
let url = URL(string: "/VWiOSProjects/CollageMakerDemo/Development/CollageMaker/CollageMaker/Goodies.xcassets/Goodies-1.imageset/Goodies-1.png")!
let imageData:NSData = NSData(contentsOf: url)!
let image = UIImage(data: imageData as Data)
cell.imgTool.image = image
NOTE: I can't upload this JSON file on Server, I need to use it Locally
I have solved my issue using fileURLWithPath
let url = URL.init(fileURLWithPath: "/VWiOSProjects/CollageMakerDemo/Development/CollageMaker/CollageMaker/Goodies.xcassets/Goodies-1.imageset/Goodies-1.png")
let imageData:NSData = NSData(contentsOf: url)!
let image = UIImage(data: imageData as Data)
cell.imgTool.image = image
If the images are in Assets(*.xcassets) folder, the you can access it by init(named:) method.
cell.imgTool.image = UIImage(named: "img1")
Actually you no need to store the entire path. You could store image names in array or something.
In my point of view, the best way is to add All Images to *.xcassets folder.(Because you have preloaded 5-10 images)
In case you needs to display it in collection view or TableView,
let imageName = "Goodies-\(indexPath.row)"
cell.imgTool.image = UIImage(named: imageName)
If images are in assets folder itself then go for #Lal Krishna's method. And if they are on server then you should add http:// or https:// and the URL of server followed by JSON's URL.
If still you are not getting it then let me know.
I have an application where user can upload multiple images and all the images will be stored in a server and will be displayed on a web view in my iOS application.
Now everything used to work just about fine till iOS 10 but suddenly we started seeing some pictures/ images not being displayed , after a little debugging we found out that this is the problem caused because of the new image format of apple (HEIC),
I tried changing back to the Native UIImagePicker (picks only one image) and the images are being displayed as Apple I guess is converting the Image from HEIC to JPG when a user picks them, but this is not the case when I use 3rd party libraries as I need to implement multiple image picker.
Though we are hard at work to make the conversion process on the server side to avoid users who have not updated the app to face troubles, I also want to see if there is any way in which I can convert the image format locally in my application.
There's a workaround to convert HEIC photos to JPEG before uploading them to the server :
NSData *jpgImageData = UIImageJPEGRepresentation(image, 0.7);
If you use PHAsset, the, in order to have the image object, you'll need to call this method from PHImageManager:
- (PHImageRequestID)requestImageForAsset:(PHAsset *)asset targetSize:(CGSize)targetSize contentMode:(PHImageContentMode)contentMode options:(nullable PHImageRequestOptions *)options resultHandler:(void (^)(UIImage *__nullable result, NSDictionary *__nullable info))resultHandler;
On server side you also have the ability to use this API or this website directly
I've done it this way,
let newImageSize = Utility.getJpegData(imageData: imageData!, referenceUrl: referenceUrl!)
/**
- Convert heic image to jpeg format
*/
public static func getJpegData(imageData: Data, referenceUrl: NSURL) -> Data {
var newImageSize: Data?
if (try? Data(contentsOf: referenceUrl as URL)) != nil
{
let image: UIImage = UIImage(data: imageData)!
newImageSize = image.jpegData(compressionQuality: 1.0)
}
return newImageSize!
}
In Swift 3, given an input path of an existing HEIF pic and an output path where to save the future JPG file:
func fromHeicToJpg(heicPath: String, jpgPath: String) -> UIImage? {
let heicImage = UIImage(named:heicPath)
let jpgImageData = UIImageJPEGRepresentation(heicImage!, 1.0)
FileManager.default.createFile(atPath: jpgPath, contents: jpgImageData, attributes: nil)
let jpgImage = UIImage(named: jpgPath)
return jpgImage
}
It returns the UIImage of the jpgPath or null if something went wrong.
I have found the existing answers to be helpful but I have decided to post my take on the solution to this problem as well. Hopefully it's a bit clearer and "complete".
This solution saves the image to a file.
private let fileManager: FileManager
func save(asset: PHAsset, to destination: URL) {
let options = PHContentEditingInputRequestOptions()
options.isNetworkAccessAllowed = true
asset.requestContentEditingInput(with: options) { input, info in
guard let input = input, let url = input.fullSizeImageURL else {
return // you might want to handle this case
}
do {
try self.save(input, at: url, to: destination)
// success!
} catch {
// failure, handle the error!
}
}
}
private func copy(
_ input: PHContentEditingInput, at url: URL, to destination: URL
) throws {
let uniformType = input.uniformTypeIdentifier ?? ""
switch uniformType {
case UTType.jpeg.identifier:
// Copy JPEG files directly
try fileManager.copyItem(at: url, to: destination)
default:
// Convert HEIC/PNG and other formats to JPEG and save to file
let image = UIImage(data: try Data(contentsOf: url))
guard let data = image?.jpegData(compressionQuality: 1) else {
return // you might want to handle this case
}
try data.write(to: destination)
}
}
I am getting an Image as Data from server.To show it I am using UIImage?(data:) to show it.For a specific image application is getting crash because of memory pressure. What could be the reason, how to fix it.
if let imgData = Utils.fetchDataFromDocumentDirectory(imageName:"test.jpg"){
attachmentImgView.image = UIImage(data:imgData)
}
How big is the Image? and are you downloading only 1 image or an array?
This might be caused from the size of the image you are trying to download.
My advice if you are trying to show an image, only giving it the url like so:
let url = URL(string: "http://i.imgur.com/w5rkSIj.jpg")
let data = try? Data(contentsOf: url)
if let imageData = data {
let image = UIImage(data: data)
}
even better you can try to use AsyncImageView 3rd party library where you give it the url of the image and it shows it asynchronously without delays in the app.
Hope this helps!
I'm developing an app that allows users to edit photos using PhotoKit. I was previously saving the edited photo to disk as a JPEG. I would like to avoid converting to JPEG and have implemented the modifications in order to do that. It works great for photos taken with the camera, but if you try to edit a screenshot, the PHPhotoLibrary.sharedPhotoLibrary().performChanges block will fail and log The operation couldn’t be completed. (Cocoa error -1.). I am not sure why this is causing the performChanges block to fail, what have I done wrong here?
I've created a sample app available to download that demonstrates the problem, and I've included the relevant code below. The app attempts to edit the newest photo in your photo library. If it succeeds it will prompt for access to edit the photo, otherwise nothing will happen and you'll see the console log. To reproduce the issue, take a screenshot then run the app.
Current code that works with screenshots:
let jpegData: NSData = outputPhoto.jpegRepresentationWithCompressionQuality(0.9)
let contentEditingOutput = PHContentEditingOutput(contentEditingInput: self.input)
var error: NSError?
let success = jpegData.writeToURL(contentEditingOutput.renderedContentURL, options: NSDataWritingOptions.AtomicWrite, error: &error)
if success {
return contentEditingOutput
} else {
return nil
}
Replacement code that causes screenshots to fail:
let url = self.input.fullSizeImageURL
let orientation = self.input.fullSizeImageOrientation
var inputImage = CIImage(contentsOfURL: url)
inputImage = inputImage.imageByApplyingOrientation(orientation)
let outputPhoto = createOutputImageFromInputImage(inputImage)!
let originalImageData = NSData(contentsOfURL: self.input.fullSizeImageURL)!
let imageSource = CGImageSourceCreateWithData(originalImageData, nil)
let dataRef = CFDataCreateMutable(nil, 0)
let destination = CGImageDestinationCreateWithData(dataRef, CGImageSourceGetType(imageSource), 1, nil) //getType automatically selects JPG, PNG, etc based on original format
struct ContextStruct {
static var ciContext: CIContext? = nil
}
if ContextStruct.ciContext == nil {
let eaglContext = EAGLContext(API: .OpenGLES2)
ContextStruct.ciContext = CIContext(EAGLContext: eaglContext)
}
let cgImage = ContextStruct.ciContext!.createCGImage(outputPhoto, fromRect: outputPhoto.extent())
CGImageDestinationAddImage(destination, cgImage, nil)
if CGImageDestinationFinalize(destination) {
let contentEditingOutput = PHContentEditingOutput(contentEditingInput: self.input)
var error: NSError?
let imageData: NSData = dataRef
let success = imageData.writeToURL(contentEditingOutput.renderedContentURL, options: .AtomicWrite, error: &error)
if success {
//it does succeed
return contentEditingOutput
} else {
return nil
}
}
The problem happens due to the fact that adjusted photos are always saved as JPG files, and screenshots are in fact PNG files.
It occurred to me while I was debugging your sample project and saw the in the PhotoEditor, contentEditingOutput.renderedContentURL is a URL to a JPG, while if you examine the result of CGImageSourceGetType(imageSource) it is clear the it's a PNG (returns a PNG UTI: public.png).
So I went and read the documentation for renderedContentURL which states that if editing a photo asset, the altered image is written in JPEG format - which clearly won't work if your image is a PNG. This leads me to think that Apple don't support editing PNG files or don't want you to. Go figure..