#Convert string to lowercase in swift how to
#Convert string to lowercase in swift code

With iOS 9 and OS X 10.11, string transforms have made the jump to the Foundation framework and are also exposed on Swift’s String type. The syntax to convert a String str to Lowercase is str.lowercased() lowercased() function returns a new String.

And in the second, we're giving it inside the String() class. 1 2 3 4 5 6 let names 'John', 'William', 'Elijah', 'Michael' let convertedNames names.map(name > name.toLowerCase()) console. Notice that in the first, we're just giving the string inside double quotes. Here, we will use the string method toLowerCase () along with an array map () method to convert the all array values into the LowerCase. In the playground, we'll create two strings using literal and instance and print them. The function returns a new string with the contents of the original string transformed to lowercase alphabets. We create a string in Swift using a String literal or String class instance.

#Convert string to lowercase in swift how to

In just four days, learn how to create your own. The tag must be valid ASCII and can contain lowercase and uppercase letters, digits, underscores, periods, and hyphens. Call lowercased() function on the String. To fix this, you can wrap your substring in a String initializer like this: let quote 'The revolution will be Swift' let substring quote.dropFirst(23) let realString String(substring) SPONSORED Build a functional Twitter clone using APIs and SwiftUI with Stream's 7-part tutorial series. let myGreeting 'Hey there' console.log(myGreeting. To convert a String to Lowercase in Swift, use String.lowercased() function. It means that the old, original string is not changed or affected in any way. Read Mattt Thompson’s excellent overview on NSHipster for more on this API. The toLowerCase () method converts the string specified into a new one that consists of only lowercase letters and returns that value. On Apple platforms, string transforms have been exposed through the CFStringTransform function in Core Foundation for a long time. For instance, you could transliterate a text written in Simplified Chinese to Latin characters, strip accents and other diacritical marks, delete invisible characters, and convert the input to lowercase before you feed the normalized string into your database’s search API, all in a single line of code.

#Convert string to lowercase in swift code

The ICU libraries provide a bunch of powerful text transformations that are very useful for processing user input, especially if your code needs to handle languages other than English and scripts other than Latin.