use emoji in label from ios default keyboard - ios

i want to use text input and emoji from iOS default keyboard and send it to server and show that text to label but i am not able to display emojis.it only display text but not emojis.
if i do it locally than it will display emoji.
self.labelName.text = TextFiled.text
output : "test 😘😝"
but when i send send it to server and receive from it from api than emoji is gone.
output : "test"
please dont down vote my question without any reason

Swift 3.0 Extension solution:
You need to encode and decode emoji's on iOS side when sending it to server. You can do it as below.
extension String {
func encodeChatString() -> String? {
if let encodedTextData = self.data(using: .nonLossyASCII) {
return String(data: encodedTextData, encoding: .utf8)
}
return nil
}
func decodeChatString() -> String? {
let trimmedString = self.trimmingCharacters(in: .whitespacesAndNewlines)
if let stringData = trimmedString.data(using: .utf8) {
let messageString = String(data: stringData, encoding: .nonLossyASCII)
return messageString
}
return nil
}
}
When you send message encode string like below:
message.encodeChatString()
When you receive message decode string like below:
message.decodeChatString()

When send a data to server use this method .
let data1 = txtMessage.text.dataUsingEncoding(NSNonLossyASCIIStringEncoding)!
let finalmessage = String(data: data1, encoding: NSUTF8StringEncoding)
when you get a response from server before set in label use this method.
let trimmedString = YOURSERVER_RESPONSE_STRING.stringByTrimmingCharactersInSet(
NSCharacterSet.whitespaceAndNewlineCharacterSet())
let data2 = trimmedString.dataUsingEncoding(NSUTF8StringEncoding)!
let messagestring = String(data: data2, encoding: NSNonLossyASCIIStringEncoding)
YOURLABEL.text = messagestring as String
Try this your problem solve.

Related

Text with emoji is not decoding - iOS Swift

I have used the following code to encode/decode the string which has emojis.
extension String {
func encodeEmoji() -> String {
let data = self.data(using: .nonLossyASCII, allowLossyConversion: true)!
return String(data: data, encoding: .utf8)!
}
func decodeEmoji() -> String? {
let data = self.data(using: .utf8)!
return String(data: data, encoding: .nonLossyASCII)
}
}
I have called this function like this below. Converted the response in the 'User' model.
let user = User() // Loaded API's response in this model
let textWithEmoji = user.aboutMe.decodeEmoji() //Here, I am getting the string as the same as before decoding
lblAboutMe.text = textWithEmoji
Following is the encoded string which is not decoding:
"I love too...\n\u2705 Laugh \uD83D\uDE02\n\u2705 Read novels \uD83D\uDCDA\n\u2705 Watch movies \uD83C\uDFAC\n\u2705 Go for bike rides \uD83D\uDEB5\uD83C\uDFFD\u200D\u2640\uFE0F\n\u2705 Go for long walks \uD83D\uDEB6\uD83C\uDFFD\u200D\u2640\uFE0F\n\u2705 Cook \uD83D\uDC69\uD83C\uDFFD\u200D\uD83C\uDF73\n\u2705 Travel \uD83C\uDDEA\uD83C\uDDFA\uD83C\uDDEE\uD83C\uDDF3\uD83C\uDDEC\uD83C\uDDE7\n\u2705 Eat \uD83C\uDF2E\uD83C\uDF5F\uD83C\uDF73\n\u2705 Play board games \u265F\n\u2705 Go to the theatre \uD83C\uDFAD\nMy favourite season is autumn \uD83C\uDF42, i love superhero movies \uD83E\uDDB8\u200D\u2642\uFE0F and Christmas is the most wonderful time of the year! \uD83C\uDF84"
Here is the original text image:
The string you are using is invalid ("I love too...\n\u2705 Laugh \uD83D\uDE02\n\u2705 Read novels \uD83D\uDCDA\n\u2705 Watch movies \uD83C\uDFAC\n\u2705")
It should be in valid String literal
"\\uD83D\\uDCDA\\u2705"
You have a string non-BMP characters in form of JSON String. And your decodeEmoji cannot convert them into valid characters.
So we need to forcefully convert such strings.
extension String {
var jsonStringRedecoded: String? {
let data = ("\""+self+"\"").data(using: .utf8)!
let result = try! JSONSerialization.jsonObject(with: data, options: .allowFragments) as! String
return result
}
}
After that you need to decode emoji from above string using below function.
extension String {
var decodeEmoji: String? {
let data = self.data(using: String.Encoding.utf8,allowLossyConversion: false);
let decodedStr = NSString(data: data!, encoding: String.Encoding.nonLossyASCII.rawValue)
if decodedStr != nil{
return decodedStr as String?
}
return self
}
}
Usually JSON decoder can decode these type of characters into emoji
May be there is chances of invalid JSON
First need to verify these things that json is valid or not before using.
USAGE:
let jsonDecodedString = "Your string".jsonStringRedecoded
let decodedEmojiText = jsonDecodedString?.decodeEmoji
debugPrint("\(decodedEmojiText)")

Issue in converting Base64string into string

I am trying to convert base64 string in to string format but I always get nil. My base64 string is "NWQwMDU2ZjhiZjRjYmI2M2MxZTI0NzQzNjAxMjMxMzAyMDh8NjAxMjMxMzAyMDh8NWQwMDU2Zjhi\nZjRjYmI2M2MxZTI0NzQzfDYwMTIzMTMwMjA4fG5hdmlnYXRpb25UZXN0MDA1fDIwMTktMDYtMjEg\nMDk6MzQ6MDB8MA==\n"
After decoding, Is suppose to look like this "5d0056f8bf4cbb63c1e2474360123130208|60123130208|5d0056f8bэ͌Ŕ٥ѥQشĂs3C�".
Here is my code event I tried to remove the "=\n" from string but not succeed.
func qrScanningSucceededWithCode(_ str: String?) {
scanTicketView.qrData = QRData(codeString: str)
let charsToRemove: Set<Character> = Set("=\n")
let newNumberCharacters = String(str!.filter { !charsToRemove.contains($0) })
let decodedString = String(data: Data(base64Encoded: newNumberCharacters)!, encoding: .utf8)!
print(decodedString)
}
This works:
let string = "NWQwMDU2ZjhiZjRjYmI2M2MxZTI0NzQzNjAxMjMxMzAyMDh8NjAxMjMxMzAyMDh8NWQwMDU2Zjhi\nZjRjYmI2M2MxZTI0NzQzfDYwMTIzMTMwMjA4fG5hdmlnYXRpb25UZXN0MDA1fDIwMTktMDYtMjEg\nMDk6MzQ6MDB8MA==\n"
let joined = string.replacingOccurrences(of: "\n", with: "")
if let data = Data(base64Encoded: joined) {
String(data: data, encoding: .utf8)
}

How to replace Unicode characters with ASCII in Swift?

I have this text: "QWERTY\\\\u0119"
How can I convert this text into normal text without unicode?
I've tried many ways, but nothing in the result. For example I've tried this one:
myString.cString(using: .utf8)
or I've created an extension for String:
func utf8DecodedString()-> String {
let data = self.data(using: .utf8)
if let message = String(data: data!, encoding: .nonLossyASCII){
return message
}
return ""
}
but they are not working. What I'm doing wrong?

Swift 2.3 - Decode Emoji String [duplicate]

I'm trying to encode and decode Emojis to send them to my database.
I use this to encode:
var comentario = String()
let data = Comment.data(using: String.Encoding.nonLossyASCII, allowLossyConversion: true)
if let data = data {
let emojiString = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
comentario = emojiString
}
And it works. But now I don't know how to decode the emoji.
This is the type of encode ---> \ud83d\ude1a
Your encoding code can be simplified to
func encode(_ s: String) -> String {
let data = s.data(using: .nonLossyASCII, allowLossyConversion: true)!
return String(data: data, encoding: .utf8)!
}
Note that it encodes all non-ASCII characters as \uNNNN, not only
Emojis. Decoding is done by reversing the transformations:
func decode(_ s: String) -> String? {
let data = s.data(using: .utf8)!
return String(data: data, encoding: .nonLossyASCII)
}
This returns an optional because it can fail for invalid input.
Example:
let s = "Hello 😃."
let e = encode(s)
print(e) // Hello \ud83d\ude03.
if let d = decode(e) {
print(d) // Hello 😃.
}
Of course you can also define the code as extension methods of the
String type, and you might want to choose better function names.
I fixed this. If you have a server with encode utf8mb4, then for encoding emojis use this code:
var comentario = String()
let data = Comment.data(using: String.Encoding.nonLossyASCII, allowLossyConversion: true)
if let data = data {
let emojiString = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String
comentario = emojiString
}// comentario contains the emoji encoded
DECODING:
let data = comentarios.data(using: String.Encoding.utf8, allowLossyConversion: false)
if data != nil{
let valueunicode = NSString(data: data!, encoding: String.Encoding.nonLossyASCII.rawValue) as? String
if valueunicode != nil{
comentarios = valueunicode!
}
}//comentarios contantes the deecode string(emoji)

How to convert string to unicode(UTF-8) string in Swift?

How to convert string to unicode(UTF-8) string in Swift?
In Objective I could write smth like that:
NSString *str = [[NSString alloc] initWithUTF8String:[strToDecode cStringUsingEncoding:NSUTF8StringEncoding]];
how to do smth similar in Swift?
Swift 4 and 5 I have created a String extension
extension String {
func utf8DecodedString()-> String {
let data = self.data(using: .utf8)
let message = String(data: data!, encoding: .nonLossyASCII) ?? ""
return message
}
func utf8EncodedString()-> String {
let messageData = self.data(using: .nonLossyASCII)
let text = String(data: messageData!, encoding: .utf8) ?? ""
return text
}
}
Swift 4:
let str = String(describing: strToDecode.cString(using: String.Encoding.utf8))
Use this code,
let str = String(UTF8String: strToDecode.cStringUsingEncoding(NSUTF8StringEncoding))
hope its helpful

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