We can only make use of a half-open Range as that’s required by the String subscript. The String.Index takes into account the actual size of a character. The solution to this problem is to make use of Range instead of Range. Therefore, our substring is not returning the expected outcome and misses the ‘h’. Print(emojiText.substring(with: NSRange(location: 0, length: 7)))Īs you can see, the rocket emoji is more than one character long. We can demonstrate this by working with an NSRange and an NSString that contains an emoji: However, not every character is of the same size.
As you might know, a String is a collection of characters. Strings and ranges are a bit more special. NSColor = "UIExtendedSRGBColorSpace 1 0.5 0 1" Let attributedString = NSMutableAttributedString(string: title)ĪtAttributes(, range: convertedRange) Let convertedRange = NSRange(range, in: title) We can fix this by making use of the available convenience initializer of an NSRange that takes a Swift Range: Print(names) // Half-open range operator going from a.?' to expected argument type 'NSRange' (aka '_NSRange')Īs Range can’t be converted to NSRange we’re running into the following error:Ĭannot convert value of type ‘Range?’ to expected argument type ‘NSRange’ (aka ‘_NSRange’)
CONVERT STRING TO LOWERCASE IN SWIFT CODE
Therefore, you could write the above code as follows: Obviously, Swift is smart enough to detect the countable variant by itself. And in the second, we're giving it inside the String () class. Notice that in the first, we're just giving the string inside double quotes. In the playground, we'll create two strings using literal and instance and print them. For this, however, we need to make use of the CountableClosedRange type: Swift String Basics We create a string in Swift using a String literal or String class instance. The different types of operators can also be used to select elements from a collection. For example, if you’d like to iterate over all elements of a collection: The closed operator is useful if you’d like to use all the values. Let’s go over the different types available in Swift.Ĭlosed range operator going from a…b let range: ClosedRange = 0.10Ī closed range operator going from a.b defines a range that includes both a and b in which a must not be greater than b. The easiest way of working with them is by making use of the range operator. There are multiple types of ranges in Swift you can use. With our SDKs, you can bring high-quality chat experiences to all of your end users. The #1 Chat API for Custom Messaging Apps Stream's Chat SDK helps you build beautiful chat applications with as little code as possible.
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