Need help...
private func classifyImage() {
let currentImageName = classifyimage
guard let image = UIImage(named: currentImageName?.convertToBuffer() as! String),
let resizedImage = image.resizeImageTo(size:CGSize(width: 224, height: 224)),
let buffer = resizedImage.convertToBuffer()
else {
return
}
let output = try? model.prediction(image: buffer)
}
Originally the codes should be produced as arrays but I'm trying to put image input without arrays and recognize the images. It keep saying it has to be a string and I have placed an unwrapped but still it doesn't work... Any idea what to do?
Related
I am working on an app that will retrieve posts from WordPress and allow the user to view each post individually, in detail. The WordPress API brings back the post content which is the HTML of the post. (Note: the img tags are referencing the WordPress URL of the uploaded image)
Originally, I was using a WebView & loading the retrieved content directly into it. This worked great; however, the images seemed to be loading on the main thread, as it caused lag & would sometimes freeze the UI until the image had completed downloading. I was suggested to check out the Aztec Editor library from WordPress; however, I could not understand how to use it (could not find much documentation).
My current route is parsing the HTML content and creating a list of dictionaries (keys of type [image or text] and content). Once it is parsed, I build out the post by dynamically adding Labels & Image views (which allows me to download images in background). While this does seem overly-complex & probably the wrong route, it is working well (would be open to any other solutions, though!) My only issue currently is the delay of converting an HTML string to NSAttributedText. Before adding the text content to the dictionary, I will convert it from a String to an NSAttributedString. I have noticed a few seconds delay & the CPU of the simulator getting up to 50-60% for a few seconds, then dropping. Is there anyway I could do this conversion on a background thread(s) and display a loading animation during this time?
Please let me know if you have any ideas or suggestions for a better solution. Thank you very much!
Code:
let postCache = NSCache<NSString, AnyObject>()
var yPos = CGFloat(20)
let screenWidth = UIScreen.main.bounds.width
...
func parsePost() -> [[String:Any]]? {
if let postFromCache = postCache.object(forKey: postToView.id as NSString) as? [[String:Any]] {
return postFromCache
} else {
var content = [[String:Any]]()
do {
let doc: Document = try SwiftSoup.parse(postToView.postContent)
if let elements = try doc.body()?.children() {
for elem in elements {
if(elem.hasText()) {
do {
let html = try elem.html()
if let validHtmlString = html.htmlToAttributedString {
content.append(["text" : validHtmlString])
}
}
} else {
let imageElements = try elem.getElementsByTag("img")
if(imageElements.size() > 0) {
for image in imageElements {
var imageDictionary = [String:Any]()
let width = (image.getAttributes()?.get(key: "width"))!
let height = (image.getAttributes()?.get(key: "height"))!
let ratio = CGFloat(Float(height)!/Float(width)!)
imageDictionary["ratio"] = ratio
imageDictionary["image"] = (image.getAttributes()?.get(key: "src"))!
content.append(imageDictionary)
}
}
}
}
}
} catch {
print("error")
}
if(content.count > 0) {
postCache.setObject(content as AnyObject, forKey: postToView.id as NSString)
}
return content
}
}
func buildUi(content: [[String:Any]]) {
for dict in content {
if let attributedText = dict["text"] as? NSAttributedString {
let labelToAdd = UILabel()
labelToAdd.attributedText = attributedText
labelToAdd.numberOfLines = 0
labelToAdd.frame = CGRect(x:0, y:yPos, width: 200, height: 0)
labelToAdd.sizeToFit()
yPos += labelToAdd.frame.height + 5
self.scrollView.addSubview(labelToAdd)
} else if let imageName = dict["image"] as? String {
let ratio = dict["ratio"] as! CGFloat
let imageToAdd = UIImageView()
let url = URL(string: imageName)
Nuke.loadImage(with: url!, into: imageToAdd)
imageToAdd.frame = CGRect(x:0, y:yPos, width: screenWidth, height: screenWidth*ratio)
yPos += imageToAdd.frame.height + 5
self.scrollView.addSubview(imageToAdd)
}
}
self.scrollView.contentSize = CGSize(width: self.scrollView.contentSize.width, height: yPos)
}
extension String {
var htmlToAttributedString: NSAttributedString? {
guard let data = data(using: .utf8) else { return NSAttributedString() }
do {
return try NSAttributedString(data: data, options: [.documentType: NSAttributedString.DocumentType.html, .characterEncoding:String.Encoding.utf8.rawValue], documentAttributes: nil)
} catch {
return NSAttributedString()
}
}
var htmlToString: String {
return htmlToAttributedString?.string ?? ""
}
}
( Forgive me for the not-so-clean code! I am just wanting to make sure I can achieve a desirable outcome before I start refactoring. Thanks again! )
I am using the below code to work out if the image name in box1Image is equal to "sallywin.png".
Id doesnt seem to work.
How would I go about coding this?
Any help much appreciated
if (box1Image.image?.isEqual(UIImage(named: "smswin.png")))! {
self.box1Image.image = UIImage(named:"sallywin.png")
}
You cannot directly compare two images are same. You can get the images as NSDATA and then you can compare two NSDATA values are equal.
You can compare 2 images using NSData.
let imageName1 : UIImage = UIImage(named: "Selected_1.png")!
let imageName2 : UIImage = UIImage(named: "UnSelected.png")!
let imageView = UIImageView(image: imageName1)
if imageCompare(imageView.image!, isEqualTo: imageName2)
{
print("TRUE")
}
else
{
print("FALSE")
}
func imageCompare(image1: UIImage, isEqualTo image2: UIImage) -> Bool {
let data1: NSData = UIImagePNGRepresentation(image1)!
let data2: NSData = UIImagePNGRepresentation(image2)!
return data1.isEqual(data2)
}
I'm try rewrite metadata from JPG file. I want addition one keyword to metadata. Xcode don't give any errors, but file not changed.
Here is my code:
var pathToOpenFile:NSURL?
Next I write path from file to variable "pathToOpenFile".
If user pushed ENTER button into NSTextField, then work action:
#IBAction func endEditKeys(sender: AnyObject) {
if (pathToOpenFile != nil) {
let imageSource = CGImageSourceCreateWithURL(pathToOpenFile!, nil)
let imageProperties = CGImageSourceCopyPropertiesAtIndex(imageSource!, 0, nil)! as NSDictionary;
let exifDict = imageProperties.valueForKey("{IPTC}") as! NSDictionary;
var Keywords:[String] = exifDict.valueForKey("Keywords") as! [String];
Keywords.append("ANY")
exifDict.setValue(Keywords, forKey: "Keywords")
let type = CGImageSourceGetType(imageSource!)
let count = CGImageSourceGetCount(imageSource!)
let mutableData = NSMutableData(contentsOfURL: pathToOpenFile!)
let destination = CGImageDestinationCreateWithData(mutableData!, type!, count, nil)
let removeExifProperties: CFDictionary = exifDict
for i in 0..<count {
CGImageDestinationAddImageFromSource(destination!, imageSource!, i, removeExifProperties)
}
CGImageDestinationFinalize(destination!)
}
}
Can you help me, why it isn't work (not change metadata)? Thank you!
Thanks all!
It is working, just need rewrite .JPG file in end.
if let _ = try? mutableData!.writeToURL(pathToOpenFile!, options: NSDataWritingOptions.AtomicWrite) {
// if you need, do anything. For example "print ("Savig file")"
}
I'm trying to get the resolution of the camera of a device using swift.
I'm using CMVideoFormatDescriptionGetDimensions which requires a CMVideoFormatDescription, but AVCaptureDevice.formatDescription returns a CMFormatDescription. I've tried a multitude of ways to cast CMFormatDescription to CMVideoFormatDescription and can't seem to get it working.
Below is a sample of the code that I'm using:
for format in device.formats as [AVCaptureDeviceFormat] {
let videoDimensions = CMVideoFormatDescriptionGetDimensions(format.formatDescription)
}
This doesn't seem possible in Swift at the moment. One solution then would be to write a helper function in objective-c, such as:
CMVideoDimensions CMFormatDescriptionGetDimensions(CMFormatDescriptionRef formatDescription)
{
if (CMFormatDescriptionGetMediaType(formatDescription) == kCMMediaType_Video)
return CMVideoFormatDescriptionGetDimensions(formatDescription);
else
return (CMVideoDimensions) {
.width = 0,
.height = 0
};
}
Include the header with the function prototype in the Swift bridging header so that it will be accessible as a global function from your Swift code.
I was able to get the resolution using the swift method below:
let captureDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo) as AVCaptureDevice
let formatDesc = captureDevice.activeFormat.formatDescription
let dimensions = CMVideoFormatDescriptionGetDimensions(formatDesc)
Here's a solution in pure Swift, really only usable for logging purposes and such. Paste the following function in your class or somewhere else:
func widthAndHeightFromTrack(track: AVAssetTrack) -> CGSize {
let str = track.formatDescriptions.description
let regex = try! NSRegularExpression(pattern: "[0-9]{2,4} x [0-9]{2,4}", options: [])
if let result = regex.firstMatchInString(str, options: [], range: NSMakeRange(0, str.characters.count)) {
let dimensionString = (str as NSString).substringWithRange(result.range)
let dimensionArray = dimensionString.componentsSeparatedByString(" x ")
let width = Int(dimensionArray[0])
let height = Int(dimensionArray[1])
return CGSize(width: width!, height: height!)
}
return CGSizeZero
}
Example usage:
let allTracks: AVAsset = someAVAsset.tracksWithMediaType(AVMediaTypeVideo)
let videoTrack = allTracks[0]
let videoTrackDimensions = widthAndHeightFromTrack(videoTrack)
// You now have a CGSize, print it
print("Dimensions: \(videoTrackDimensions)")
Of course, the above solution will completely break whenever Apple changes something in the string representation of the CMFormatDescription. But it's useful for logging the dimensions.
Maybe, question is too old, but the Swift issue is still not fixed.
public extension AVURLAsset {
var audioFormatDescription: CMAudioFormatDescription? {
if let track = self.tracks(withMediaType: .audio).first,
let untypedDescription = track.formatDescriptions.first {
// hacks, warnings, disablings of swiftlint below are wrork-around of
// Swift bug: it fails converting 'Any as CMFormatDescription'
let forceTyped: CMFormatDescription?
//swiftlint:disable force_cast
= untypedDescription as! CMAudioFormatDescription
//swiftlint:enable force_cast
if let description = forceTyped {
return description
} else {
return nil
}
} else {
return nil
}
}
}
I am using an UIImage, in which I have an Image, and I want to know the name of image.
That functionality is not built-in to UIImage because images are not always loaded from files. However, you could create a custom UIImageView subclass to fit your needs.
It is not possible. UIImage instance contains the actual image data without any reference to the filename.
Images do not necessarily come from files or other named sources, so not all images even have a name. When you create an image from a file, you could store the name in a separate NSString*, and then refer to that stored name when necessary.
this code will help you out
NSString *imgName = [self.imgView1st image].accessibilityIdentifier;
NSLog(#"%#",imgName);
[self.imgView2nd setImage:[UIImage imageNamed:imgName]];
On later iOS versions it's possible to extract image name from the description. Aware, for the debug use only!
extension UIImage {
/// Extracts image name from a description.
/// * Example description: `<UIImage:0x60000278ce10 named(main: ic_timeline_milestone_bluedot) {16, 16}>`
/// * Example name: `ic_timeline_milestone_bluedot`
/// - warning: For the debug use only.
var name: String? {
let description = self.description
guard let regexp = try? NSRegularExpression(pattern: "\\(main: (.*)\\)", options: []) else { return nil }
guard let match = regexp.matches(in: description, options: [], range: description.fullRange).first else { return nil }
guard match.numberOfRanges > 0 else { return nil }
let idx1 = description.index(description.startIndex, offsetBy: range.lowerBound)
let idx2 = description.index(description.startIndex, offsetBy: range.upperBound)
return String(description[idx1..<idx2])
}
}
This answer (https://stackoverflow.com/a/72542728/897465) has (what I believe) the best answer:
let img = UIImage(named: "something")
img?.imageAsset?.value(forKey: "assetName")
Here's a handy extension for it:
extension UIImage {
var containingBundle: Bundle? {
imageAsset?.value(forKey: "containingBundle") as? Bundle
}
var assetName: String? {
imageAsset?.value(forKey: "assetName") as? String
}
}