Ability to set line spacing

ChainedAttributedString/NSMutableAttributedString+ChainedAttributes.swift

@@ -220,6 +220,31 @@ public extension NSMutableAttributedString {
         return self
     }
 
+    /**
+     This function adds paragraphy style with line spacing to attributed string.
+
+     - warning: If text passed in "text" parameter is not found, attribute will be applied to whole attributed string. Only first occurence of "text" is styled.
+
+     - parameter value - CGFloat which should be applied as linespacing to the paragraph style
+     - parameter text - String for which the paragraph style will be applied to (optional, default = whole attributed string)
+
+     - returns: Modified NSMutableAttributedString
+     */
+    func lineSpacing(_ value:CGFloat, forText text:String? = nil) -> NSMutableAttributedString {
+
+        var attributeRange:NSRange? = nil
+        if let textForAttribute = text {
+            attributeRange = self.getRangeOfStringInSelf(textForAttribute)
+        }
+
+        let paragraphStyle = NSMutableParagraphStyle()
+        paragraphStyle.lineSpacing = value
+
+        self.applyAttribute(NSParagraphStyleAttributeName, withValue: paragraphStyle as AnyObject, forRange: attributeRange)
+
+        return self
+    }
+
     // MARK: Clear attributes
 
     /**

Example/Example/ViewController.swift

@@ -20,13 +20,14 @@ class ViewController: UIViewController {
         let one = "Test".attributedString() + "One".attributedString()
 
         //apply attributes
-        self.exampleLabel.attributedText = "This sample text shows chained attributes".attributedString()
+        self.exampleLabel.attributedText = "This sample text shows chained attributes\nWith line spacing as an option".attributedString()
             .textColor(UIColor.red, forText: "sample")
             .font(UIFont.boldSystemFont(ofSize: 20), forText: "This")
             .kernSpacing(-1, forText: "text")
             .strikeThrough(2, forText: "shows")
             .strikeThroughColor(UIColor.blue)
             .underline(2, forText: "attributes")
+            .lineSpacing(10)
 
     }