string to float swift

Converting a String to a Double or Float can be easily achieved by using the if let statement in Swift. About The easiest way to convert a string to a floating-point number is by using these C++11 functions:. The accepted answer shows a more up to date way of doing. This got changed in Swift 1.2 so that you need to explicitly cast between these data types, and this remains the same in Swift today. floatValue is a method of NSString. This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions. type. UIScrollView Scrollable Content Size Ambiguity. How to enumerate an enum with String type? Optional vs implicitly unwrapped optional: what’s the difference? std::stof() - convert string to float std::stod() - convert string to double std::stold() - convert string to long double. Paul Hudson @twostraws May 28th 2019. How do I check if a string contains another string in Swift? Update Policy Any way to replace characters on Swift String? Why are emoji characters like ‍‍‍ treated so strangely in Swift strings? It is best to create a NSNumberFormatter to convert a string to float. Now with Swift 2.0 you can just use Float(Wage.text) which returns a Float? The best way to handle this is direct casting: I actually created an extension to better use this too: Now you can just call var WageConversion = Wage.text.floatValue and allow the extension to handle the bridge for you! When Swift originally launched, NSString (older iOS strings) and native Swift strings were completely interchangeable, as were NSArray and Swift arrays, plus NSDictionary and Swift dictionaries. There are several ways to convert between a string and a Float, but the easiest way is to use NSString as an intermediate because that comes with several helpers built right in: Sponsor Hacking with Swift and reach the world's largest Swift community! How do I write dispatch_after GCD in Swift 3, 4, and 5? In Swift, what’s the cleanest way to get the last two items in an Array? Learning by Sharing Swift Programing and more …. Given a Float or a Double value: var value = 4.53978. It is best to create a NSNumberFormatter to convert a string to float. let numberFormatter = NSNumberFormatter() numberFormatter.numberStyle = NSNumberFormatterStyle.DecimalStyle. This post presents code examples for converting a String into an Int, Double, Float, Bool, and Data, including Unicode, in Swift.. Because in some parts of the world, for example, a comma is used instead of a decimal. For example, if a number is 45.6789, you might only want to show two digits after the decimal place. Swift version: 5.2. SPONSORED Announcing NSSpain 2020: Remote Edition! How to convert dates and times to a string using DateFormatter, How to handle unknown properties and methods using @dynamicMemberLookup, Click here to visit the Hacking with Swift store >>. Int, Float, Double,String etc. Swift how to sort array of custom objects by property value. Because in some parts of the world, for example, a comma is used instead of a decimal. Detect if Swift app is being run from Xcode. How do I see which version of Swift I’m using? Grab the String to Double Cheatsheet and Swift Playground mentioned below in the toolkit for a quick reference that you can use as you work on your apps. However, if I used the .doubleValue instead, I would get the 1.1 that I wanted. How to get overall CPU usage in iOS Swift 4.x, Get CPU usage percentage of single iOS App in Swift 4.x, Get the currently connected WiFi informations in Swift 4.x, Check connection from iOS device to server by Swift 4.X, Get the server’s current time with Swift 4.X URLSession, Write a log text file on Disk use TextOutputStream in Swift 4 iOS, How to change Status Bar text color in iOS. Function with in-out parameters When you define the function parameter, the function parameters cannot be modified inside the body. BLACK FRIDAY: Save 50% on all books and bundles! I have two UITextfields which are declared as follows: When the user presses a UIButton I want to calculate the wages the user earns, but I can’t, as I need to convert them to floats first, before I can use them. Now with Swift 2.0 you can just use Float(Wage.text) which returns a Float? Since bridgeToObjectiveC() is no longer available with Xcode 6 Beta 5, you can use the as operator to cast your Swift String to NSString: (device.systemVersion as NSString).floatValue The use of Swift 3 @objc inference in Swift 4 mode is deprecated? Code of Conduct, Hacking with Swift is sponsored by Gold Supporters on Patreon – click here to find out more. Working with String is a common task in macOS and iOS apps. type. Just wanted to add this to the discussion in case someone else had been running into the same issue. Static vs class functions/variables in Swift classes. Swift, the Swift logo, Swift Playgrounds, Xcode, Instruments, Cocoa Touch, Touch ID, AirDrop, iBeacon, iPhone, iPad, Safari, App Store, watchOS, tvOS, Mac and macOS are trademarks of Apple Inc., registered in the U.S. and other countries. Is it possible to remove the delay of UIButton’s highlighted state inside a UIScrollView? So for example, instead of using the accepted solution, I used this instead: In my case I did not need double-precision, but using the .floatValue was not giving me the proper result. Convert a String into an Int, Int8, Int16, Int32, and Int64 Hacking with Swift is ©2020 Hudson Heavy Industries. Here's an example using basic string interpolation: let angle = 45.6789 let raw = "Angle: \(angle)" That will make the raw value equal to "Angle: 45.6789". More clear than the below solution which just returns 0. If you’d like to interpolate a float or a double with a String in Swift, use the %f String format specifier with appropriate number in order to specify floating point precision. Converting a String to a Double or Float can be easily achieved by using the if let statement in Swift. var float = -33.861382 var string = "my float is " + float.description or you could let swift do it for you using: var string = "my float is \(float)" Solution 3: In swift 3 it is simple as given below. How does one generate a random number in Apple’s Swift language? func floatValueFromData(data: NSData) -> Float { return unsafeBitCast(UInt32(bigEndian: UnsafePointer(data.bytes).memory), Float.self) } Example: Floating-Point number is by using these C++11 functions: in-out parameters When you define the parameter. 2.0 you can convert a string contains another string in Swift, what ’ Swift! Function with in-out parameters When you define the function parameter, the function parameters can not modified... 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