Swift String Encoding

This section on strings was originally written by Airspeed Velocity for the first edition of the book, and Chris and myself updated it for the upcoming edition. You use this code to encode [Student], [String: Student], Set and Student?. A conforming type can encode itself to some other representation. The most popular format may be JSON but it also works great for old school Cocoa property lists. archiveRootObject ( personClassObject , toFile : HelperClass. encodedOffset Here you get the offset of endIndex in swiftVersion. ios - How to encode a URL in Swift - Stack Overflow. Let's give it a go with Swift. I have write two methods to convert Hex string to ASCII and ASCII string to Hex string. The bytearray() takes three optional parameters: source (Optional) - source to initialize the array of bytes. Swift 4 comes with the new ideas for encoding and decoding custom types using the new protocol named Codable. (Swift 2) Encode Integer to Hex or Base64 using N Bytes Demonstrates how to write an integer to N bytes (little-endian or big-endian) and return the bytes in any encoding such as hex, base64, etc. Returns true for success, false for failure. Searching for prefixes. The paradigm also changes how we. Eg: Hex string = 6220000008a01000 I convert this string to ASCII using below method. Em destaque no Meta Stack Exchange and Stack Overflow are moving to CC BY-SA 4. The Swift official blog announces Swift 5's ability to switch from preferred UTF-16 to UTF-8 while retaining effective interoperability with Objective-C. 2" let offset = swiftVersion. , sprintf, strncpy, or loops) that can be added to this type of code. Encode Object to JSON String. When you click "Generate" the data source object to be copied several times and the place of tags will be inserted random values. Returns nil on failure. How to percent encode a URL String Jan 4, 2016 · 4 minute read Swift. All gists Back to GitHub. 2 to develop my iPhone application and I am communicating with a http web service. The code for these procedures can be found here: Base58 Validator/Decoder/Encoder in Perl. Joining of two or more strings into a single one is called concatenation. (For quick practice, you can add the code inside your ViewController class in you ViewController. There is some much more to learn about mobile apps development with Swift for iOS platform! Check the video courses below and may be one of them will be just what you need. As a result encodedOffset returns an offset into the UTF-16 string: let swiftVersion = "Swift 4. XCode swift HTTPS: String(data: data!, encoding: NSUTF8StringEncoding ) return nil I am retrieving a HTML content from an HTTPS page, but for "short" content I do get it correctly. When interacting with a web service it is common to have to percent encode reserved characters in the URL or form data. Notice that it simply puts quotes around the string. ; Ashour-Abdalla, Maha; Ogino, Tatsuki; Peroomian, Vahe; Richard, Robert L. We rely on new concepts: protocol extensions, protocol inheritance, and protocol compositions. Just about every app that interacts with a server does this, and almost always there is a login API call. The new edition, revised and extended for Swift 4, is out now. I found answers in several places, but it does not work anymore in Swift. 評価を下げる理由を選択してください. Also, notice that constant is declared as camel case. 0 Content-Type: multipart/related. I'm seeing strange behavior w/ string. Objective-C and Swift URL encoding 12 answers I am trying to encode a URL request parameter in order to avoid using reserved characters. Message-ID: 277134521. Feb 12, 2016 · I want to convert a string to Base64. iso-8859-1 or Windows-1252). Therefore, if you want to send images or any other binary file to an email server you first need to encode it in text-based format, preferably ASCII. Value types all the way. Bring machine intelligence to your app with our algorithmic functions as a service API. It talks about the change to String in Swift 5 to move to using UTF-8 as its Unicode encoding strategy. In this swift php mysql tutorial we will learn connecting app to mysql. XML is the most powerful data storage and transfer medium on the web. Because of that, I ran into some trouble of figuring how to encode/decode an array of these model. These are my notes on what I needed to change to update my Swift String Cheat Sheet for Swift 4. Searching for prefixes. MAC OS X (Cocoa. Hope you found it helpful. We rely on new concepts: protocol extensions, protocol inheritance, and protocol compositions. This works smoothly in Swift 4. name = "Adidas" // Trigger set value Company. We value excellent academic writing and strive to provide outstanding essay writing service each and every time you place an order. Notice that it simply puts quotes around the string. case millisecondsSince1970 /// Encode the `Date` as an ISO-8601-formatted string (in RFC 3339 format). Press button, get base64. Press J to jump to the feed. When decoding strings from the database, make sure the input was encoded with the correct charset when it was input to the database. If this function cannot convert a value, it throws an exception. We can further expand binary search on strings such that instead of finding an exact match it looks if a string in our collection starts with our target strings. You will encounter many different JSON responses and learn how to decode those responses to your models. This is why String is 3 words in size (the start, length and buffer owner), unlike the similar Array type which is only one. No ads, nonsense or garbage. Our generic version of binary search can be used to search for a string in an array of strings. But don't know how to place a string of less than 20 (ASCII) characters into the Characteristic. If the data is pure ASCII (bytes 0-127) you’ll be fine. 2 to develop my iPhone application and I am communicating with a http web service. 1 if you are targeting previous OSs. String encoding and decoding converter. I am using Xcode 6. So that’s, all of this Swift SQLite Tutorial friends. SwiftでBase64 Encodeするには以下のように書きます。 オプションの指定方法については記載しますが、オプションの内容については今回触れません。 オプションとか指定しているrawValueって. (Swift 2) Encode Integer to Hex or Base64 using N Bytes Demonstrates how to write an integer to N bytes (little-endian or big-endian) and return the bytes in any encoding such as hex, base64, etc. plist in Swift. Hi All, I am developing an IOS app using Swift and Firebase. Below is a first pass - I used the same test string from the original Objective-C version to verify the results are as expected. I believe the answer might be work in previous Xcode versions a. stringByAddingPercentEncodingWithAllowedCharacters(customAllowedSet)!. An immutable string is a text string that is defined when it is created and subsequently cannot be changed. Parse KeyValuePair Keywords Lambda LINQ Path Process Property Random Reflection Regex Replace Sort Split Static String Switch string. 2 strings are encoded using UTF-16. (I'm sure there are others, but it's definitely not common. It can also be encoded and decoded to and from ASCII, UTF-8, UTF-16, UTF-32, or any other string encoding represented by NSString Encoding. Swift 3: Base64 encoding and decoding strings. Codable is added with Xcode 9, iOS 11 and Swift 4. OK, I Understand. 0 Content-Type: multipart/related. Yes, there are plenty of third party libraries out there, but it really should be something Swift can just do for us. stringify() method produces a URL query string from a given obj by iterating through the object's "own properties". If a value (known as a raw value) is provided for each enumeration case, the value can be a string, a character, or a value of any integer or floating-point type. The code in this first section is only useful for exposition. indexOf( '?' ) + 1 );. Just about every app that interacts with a server does this, and almost always there is a login API call. It helps to display your XML in a tree view. Swift’s String type is bridged with Foundation’s NSString class. Swift 4 comes with the new ideas for encoding and decoding custom types using the new protocol named Codable. Posted by: admin December 18, So, you can just add percent encoding on your string, which. It can also be encoded and decoded to and from ASCII, UTF-8, UTF-16, UTF-32, or any other string encoding represented by NSString Encoding. In this post we will walk through two examples using Base64 to encode and decode both NSData and NSString objects. Swift's String type defines its string-specific implementation of the greater-than operator (>) as a method that has two parameters of type String, and returns a value of type Bool. String Encoding & Decoding The IFC exchange format "STEP physical file" only allows characters represented by decimal value 32 to 126 from the code table in ISO 8859-1. This can make your app quite useful. So for my future reference and yours if you are struggling. r/swift: Swift is a general-purpose programming language built using a modern approach to safety, performance, and software design patterns. Encoding back to JSON is very similar. Swift programs use many Foundation library features. I managed to reproduce the problem with this small class for which an instance can be encoded with a key but does not seem to be decoded with the same key. Test To test the operation using the HTTP POST protocol, click the 'Invoke' button. A mutating method call changes the string in place. 0 Content-Type: multipart/related. Janie wrote about how they solved it at. When you use other encodings, it is not safe to force-unwrap (unless you explicitly know that a string is guaranteed to be representable). iOS-Apps entwickeln mit Swift September 2020 in Dresden 13. The documentation for NSString encourages developer to view it as a kind of encoding-agnostic repository of characters, which can be used to manipulate arbitrary strings, converting a specific encoding only as needed: An NSString object encodes a Unicode-compliant text string, represented as a sequence of UTF-16 code units. @available (OSX 10. For languages other than C++, Ice uses strings in their language-native Unicode representation and converts automatically to and from UTF-8 for transmission, so applications can transparently use characters from non-English alphabets. To ease this transition, the Migrator will insert explicit initializer conversions when an API now expects a different type. ; Ashour-Abdalla, Maha; Ogino, Tatsuki; Peroomian, Vahe; Richard, Robert L. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Swift's way of representing strings as encoding-independent Unicode characters means that programmers don't have to worry as much about encoding issues (like Ruby, Python, etc. Swift 4 brings some much needed improvements and simplifications to String. Playing with Swift Rediscovering the programming in iOS Encoding and Decoding Base64. The characters of the key, followed by the rest of the alphabet backwards, is then mapped to the alphabet normally. All you need is a class or struct that conforms to Content. This is where Base64 encoding comes extremely handy in converting binary data to the correct formats. For "long" content I get a nil answer. In the likely case that you encouter encoding issues you can pass encoding options to the Cmxl. This page covers how unicode characters are encoded. But I have a question: How can I make the no need be codable properties restore within the instance?; Ex: I have a User struct with some properties like id, name and so on, it has many properties but I need only some be coded/encoded, if I conformed the Codable protocol, I must implement CodingKeys and encode/decode all the properties. Python string method translate() returns a copy of the string in which all characters have been translated using table (constructed with the maketrans() function in the string module), optionally deleting all characters found in the string deletechars. Typing strings to solve bugs is the epitome of an anti-pattern. If you are going to depend on this functionality, you must make. Strings within your program can of course be in any encoding you want, but you might have to convert them for proper display. Formatting the Base64 encoded Signature so it's percent encoded. CompareOptions String. iOS-Apps entwickeln mit Swift September 2020 in Dresden 13. So that’s, all of this Swift SQLite Tutorial friends. Computing and Base64-encoding the Signature by using the HMAC-SHA256 hash of the StringToSign value. 0, the Swift standard library includes the protocols Encodable and Decodable to define a standardized approach to data encoding and decoding. Note: To dial USSD code with “#” you have to encode it like shown below else you will not get prompt for a number which contains “#”. A string is a series of characters, such as "Swift", that forms a collection. 1571362140184. If only it was as easy as using setLocalName So I'm looking for that 'magical encoding function' or steps (i. But don't know how to place a string of less than 20 (ASCII) characters into the Characteristic. Otherwise, you double-encode these names. Using codable we can generate and parse JSON or any other external representations. Swift String escaping when serializing to JSON using Codable. Just about every app that interacts with a server does this, and almost always there is a login API call. The paradigm also changes how we. SecureStore. Just unlock the link given below to download the source code. If this function cannot convert a value, it throws an exception. A conforming type can encode itself to some other representation. There's a good chance the NSString conversions (above) may be more about debugging than a day-to-day need to Base64 encoded strings. Posted by: admin November 22, 2017 Leave a comment. Aug 13, 2016 · Just completing Desmond Hume's answer to extend the String class for a RFC 3986 unreserved characters valid encoding function (needed if you are encoding query FORM parameters): Swift 3. GitHub Gist: instantly share code, notes, and snippets. I first wrote this guide for Swift 2 and have since needed to update it for Swift 3, 4 and now Swift 5. ios - encoding url using swift code - Stack Overflow. I am currently writing a program called Encoding and Decoding strings with the Enigma Class. MAC OS X (Cocoa. Kothari This post is surely going to help for easy conversion between Base64 NSString & NSData. Swift Convert String to Byte Array: utf8 and UInt8 This Swift example converts a String to a byte array with the utf8 property. It is nice when user profile has a photo. This is a companion book to the iOS Apprentice; the iOS Apprentice focuses on building apps, while Swift Apprentice focuses on the Swift language itself. We'll be using the OpenWeatherMap AP. Then I will need to store the utf8 String to a new database table. 2 to develop my iPhone application and I am communicating with a http web service. An example of a prohibited use case is defining custom <~~ and ~~> operators to decode and encode JSON data. This article shows how an ISO 15022 message looks like and decomposes it to its particular parts. Most types including String, Int, Array, Dictionary are conforming to this protocol. The Swift 4. For more information about the new String and Substring APIs, see the Swift Evolution Document for SE-0163. The most common uses of iconv will be for converting incoming text from language specific encodings into the UTF-8 ( Unicode ) character set, and converting from UTF-8 to a language specific coding. Encoding and Decoding in Swift. Note that how we use the @ symbol to declare the ‘name’ variable that wrapped by property wrapper. Adopting these protocols will allow implementations of the Encoder and Decoder protocols take your data and encode or decode it to and from an external representation such as JSON. The new edition, revised and extended for Swift 4, is out now. Swift's original String implementation was a shim over NSString, which does date back to an era where UTF8 was… well, not as obvious a choice anyway, I won't say it wasn't a good choice even then. Let’s Take an. When the above code gets executed, the app user will be shown a Dial prompt like below and will have to choose an action. It helps to display your XML in a tree view. The string you use as a raw value for each enumeration case is the key name used during encoding and decoding. Deciding for the purpose is swift is truly the improper best option. String encoding and decoding converter. errors (Optional) - if source is a string, the action to take when the encoding conversion fails (Read more: String encoding). Computing and Base64-encoding the Signature by using the HMAC-SHA256 hash of the StringToSign value. You then send them to the webservice, which. 77 or greater. I am using Xcode 6. We value excellent academic writing and strive to provide outstanding essay writing service each and every time you place an order. For debugging purposes I used an online tool to convert a picture I had to base64 and compared this string to what it looked like using Swift. This function can convert simple values and binary values that do not contain Byte zero. Given an input string, write a function that returns the Run Length Encoded string for the input string. Deciding for the purpose is swift is truly the improper best option. I'm seeing strange behavior w/ string. It is easy to see this with an example:. Objective-C and Swift URL encoding 12 answers I am trying to encode a URL request parameter in order to avoid using reserved characters. But it's faster and smaller. Introduced in Swift 4, the Codable API enables us to leverage the compiler in order to generate much of the code needed to encode and decode data to/from a serialized format, like JSON. Codable use to support both encoding and decoding, declare conformance to Codable, which combines the Encodable and. I have write two methods to convert Hex string to ASCII and ASCII string to Hex string. I am currently writing a program called Encoding and Decoding strings with the Enigma Class. 0) Lightweight extension. Just select your JPG, PNG, GIF, or BMP picture or drag & drop it below, press Convert to Base64 button, and you get a base-64 string. The string’s value represented as a collection of Unicode scalar values. More precisely, it is an encoding of binary data in a sequence of printable characters. Provide text, raw HTML, or a public URL and IBM Watson Natural Language Understanding will give you results for the features you request. Use NSURLComponents to encode HTTP GET parameters. Yes, one word for two Protocols Encodable and Decodable. in this case it will not encode anything returning the same string. invertedSet let escapedString = string. What I want to do: I'm trying to write some extension methods for BinaryReader and BinaryWriter. Skip to content. Following is the syntax for translate() method − str. The final view property on the Swift String type is the unicodeScalars property. [email protected]> Subject: Exported From Confluence MIME-Version: 1. JSON Stringify in Swift. I am currently writing a program called Encoding and Decoding strings with the Enigma Class. Use OpenSSL for Base64 encode and decode Jul 24, '03 10:30:00AM • Contributed by: Anonymous With reference to the Archive attachments from Mail. Swift Tip: String to Data and Back. let allowedCharacters = generalDelimiters + subDelimiters let customAllowedSet = NSCharacterSet(charactersInString:allowedCharacters). 1 Beta! Swift Language! • A large number of Foundation, UIKit, CoreData, SceneKit, SpriteKit, Metal APIs have been audited for optional conformance, removing a significant number of implicitly unwrapped optionals from their interfaces. The encoding of the string that is returned is controlled by the EncodingMode property, which can be set to "Base64", "QP", or "Hex". encodedOffset Here you get the offset of endIndex in swiftVersion. We write essays, research papers, term papers, course works, reviews, theses and more, so our primary mission is to help you succeed academically. The documentation for NSString encourages developer to view it as a kind of encoding-agnostic repository of characters, which can be used to manipulate arbitrary strings, converting a specific encoding only as needed: An NSString object encodes a Unicode-compliant text string, represented as a sequence of UTF–16 code units. GitHub Gist: instantly share code, notes, and snippets. )(Also note, some examples handle errors better than others. 0 Content-Type: multipart/related. How to percent encode a URL String Jan 4, 2016 · 4 minute read Swift. Just like encoding, decoding is also very. ios - Swift: string url encoding not working as expected - Stack Overflow. To use Fast Binary Encoding you should provide a domain model (aka business objects). Provide alternative keys by specifying String as the raw-value type for the CodingKeys enumeration. I first wrote this guide for Swift 2 and have since needed to update it for Swift 3, 4 and now Swift 5. swift: Defines the wrapper you’ll implement in this tutorial. The sqlite3_bind_zeroblob() routine binds a BLOB of length N that is filled with zeroes. Notice that it simply puts quotes around the string. net-mvc , c# , cryptography , routing Leave a Comment I want to encode and decode the url parameters. Yes, there are plenty of third party libraries out there, but it really should be something Swift can just do for us. I think Swift's performance can be very hit or miss but they (Apple) are making some good strides. There are various situations where text characters must be limited to ASCII 127 or lower. I have write two methods to convert Hex string to ASCII and ASCII string to Hex string. Topics Covered. Most of the API calls in B2 pass a request in JSON, and return results in JSON. Stream stm, System. There are lots of other options available, too. 0, the Swift standard library includes the protocols Encodable and Decodable to define a standardized approach to data encoding and decoding. #06: URL/URI Escaping in Swift 3: Encoding and Decoding The most straightforward way to escape URLs in Swift is to simply use one of the methods provided by NSString from Foundation:. The Swift 4. iOS 7: Base64 Encode and Decode NSData and NSString Objects. The response I am getting is in query string format (key-value pairs) and URL encoded in. Given an input string, write a function that returns the Run Length Encoded string for the input string. SwiftでBase64 Encodeするには以下のように書きます。 オプションの指定方法については記載しますが、オプションの内容については今回触れません。 オプションとか指定しているrawValueって. each character in the string is represented by a code point. A string is a series of characters, such as "Swift", that forms a collection. bytearray() Parameters. In many cases you'll be able to avoid writing any code. Skip to content. More than 1 year has passed since last update. Although the call returns a UserInfo instance, this is a basic OIDC conformant profile and the only guaranteed claim is the sub which contains the user's id, but depending on the requested scope the claims returned may vary. Let's take a look at these new Protocols. Using codable we can generate and parse JSON or any other external representations. Example: In the below code snippet, var format: String = "png" is omitted from the CodingKeys and hence is provided a default value. util package. Head over to sarunw. It is nice when user profile has a photo. Encoding and Decoding JSON with Swift 4. utf8 to UInt. This simple tool computes the MD5 hash of a string. (Swift 2) Re-Encode (How to convert encodings) Demonstrates how to convert a string from one encoding to another. Here's how you could do this for the example dictionary (this works for any RawRepresentable dictionary with a RawValue of String or Int):. Press button, get base64. It talks about the change to String in Swift 5 to move to using UTF-8 as its Unicode encoding strategy. JSON Encoding And Decoding - Swift 5. net-mvc , c# , cryptography , routing Leave a Comment I want to encode and decode the url parameters. [인코딩] 암호화 한다는 뜻이다. encoding (Optional) - if source is a string, the encoding of the string. The most popular format may be JSON but it also works great for old school Cocoa property lists. org Precedence: bulk List-Archive: List-Unsubscribe: List-ID: Content-Transfer-Encoding: 7bit There's been a lot of interesting follow-on as to why this issue has been revisited in Atom. util package. This page covers how unicode characters are encoded. Convert Between Camel Case and Snake Case During JSON Encoding. Message-ID: 1754031306. A domain model is a set of enums, flags and structures that relate to each other and might be aggregated in some hierarchy. , sprintf, strncpy, or loops) that can be added to this type of code. We will create a very basic Swift command line program that will parse some JSON using the popular SwiftyJSON framework to learn how to work with SwiftPM. Eg: Hex string = 6220000008a01000 I convert this string to ASCII using below method. But by the time a project gets to this stage, it’s often a nontrivial amount of work to switch to Protocol Buffers or Cap’n Proto or Thrift or whatever. Analyze various features of text content at scale. Computing and Base64-encoding the Signature by using the HMAC-SHA256 hash of the StringToSign value. Swift 4 Decodable: Beyond The Basics 📦 (strings, numbers, Federico is a Bangkok-based Software Engineer with a strong passion for Swift, Minimalism, Design,. How to percent encode a URL String Jan 4, 2016 · 4 minute read Swift. The code for these procedures can be found here: Base58 Validator/Decoder/Encoder in Perl. Fast Binary Encoding (FBE) format describes domain model with as a set of enums, flags and structs. stringify() method produces a URL query string from a given obj by iterating through the object's "own properties". To perform arithmetic encoding, we first need to define a proper model. That is, don't try to do any real compression with it. Kids of this era discover by means of their detects. Adobe recommends that you use the CharsetEncode function to convert binary data to a string. Codable use to support both encoding and decoding, declare conformance to Codable, which combines the Encodable and. This is why String is 3 words in size (the start, length and buffer owner), unlike the similar Array type which is only one. ) Swift strings provide multiple views, so you can work with UTF-8, UTF-16, UTF-32, or grapheme clusters, as you need. FileManager는 URL 혹은 String 데이터 타입을 통해 파일에 접근할 수 있도록 해줍니다. C# MVC Query String Encoding and Decoding By Hường Hana 3:00 AM asp. , sprintf, strncpy, or loops) that can be added to this type of code. byte[] -> String 으로 변환하기. path ()) } static func decode () -> Person ? { let personClassObject = NSKeyedUnarchiver. The Message Encoder will encode and decode messages for you based on a simple encoding scheme. Pesquise outras perguntas com a tag ios swift character-encoding utf-8 swift-3 ou faça sua própria pergunta. (For quick practice, you can add the code inside your ViewController class in you ViewController. Codable is used to make your data types encodable and decodable for compatibility with external representations such as JSON. The encoding specifies the encoding of the hashVal. 0), so that may also help. Objective-C and Swift URL encoding 12 answers I am trying to encode a URL request parameter in order to avoid using reserved characters. All modern programming languages have support for Unicode strings, but that often only means that the native string type can store Unicode data — it's not a. How to percent encode a URL String Jan 4, 2016 · 4 minute read Swift. You can search all questions by typing below, or browse by category. iso-8859-1 or Windows-1252). New to Swift 4 is a way to deal with encoding and decoding your data with minimal effort. A type that provides the collection's iteration interface and encapsulates its iteration state. This is an excerpt from the Strings chapter in Advanced Swift. When decoding strings from the database, make sure the input was encoded with the correct charset when it was input to the database. plist in Swift. Note: -stringByAddingPercentEscapesUsingEncoding will not produce the correct encoding, in this case it will not encode anything returning the same string. Bring machine intelligence to your app with our algorithmic functions as a service API. Introduced in Swift 4, the Codable API enables us to leverage the compiler in order to generate much of the code needed to encode and decode data to/from a serialized format, like JSON. What about encoding strings?. Here's a copy-pasteable little extension without using NSString, let's cut the middle-man. Extends String class import Foundation extension String { func base64Encoded() -> String { let plainData = dataUsingEncoding(NSUTF8StringEncoding) let base64String = plainData?. All gists Back to GitHub. The Unicode code space was later extended to 21 bits (U+0000 to U+10FFFF) to allow for the encoding of historic scripts and rarely-used Kanji or Chinese characters. [email protected]> Subject: Exported From Confluence MIME-Version: 1. (Swift 2) Encode Integer to Hex or Base64 using N Bytes Demonstrates how to write an integer to N bytes (little-endian or big-endian) and return the bytes in any encoding such as hex, base64, etc. 0 Last time we looked at the quick & dirty way to get access REST APIs in iOS. - Convert a string to Lowercase - Convert a string to Uppercase - Generate a Unique Identifier - Get substring from range - Get the length of a string - Loop through characters in string - Repeat a string X times - Replace string in string - Reverse a string - Split a string by another string - Trim whitespace from a string - Use string. It can also be encoded and decoded to and from ASCII, UTF–8, UTF–16, UTF–32, or any other string encoding represented by NSString Encoding. Codable use to support both encoding and decoding, declare conformance to Codable, which combines the Encodable and. In swift language, we use alamofire as the network library. After post or get, unserialize string variable, so the original array will be available. What I'm trying to do is to convert Swift String to utf-16 in UnsafePointer<'UInt16>. Head over to sarunw. ios - How to send Json as parameter in url using swift - Stack Overflow. This CANNOT be done. Mohammad Azam. As of Swift 4. Provide alternative keys by specifying String as the raw-value type for the CodingKeys enumeration. WriteLine(System.