Add playground with example

Author: pyrosphere

.gitignore

@@ -1,5 +1,7 @@
+# macOS
 .DS_Store
-/SwiftRichString/SwiftRichString.xcodeproj/xcuserdata/danielemargutti.xcuserdatad
-/SwiftRichString/SwiftRichString.xcodeproj/project.xcworkspace/xcuserdata/danielemargutti.xcuserdatad
-/SwiftRichString.xcworkspace/xcuserdata/danielemargutti.xcuserdatad
+
+# Xcode
+xcuserdata
 *.xcuserstate
+*.xctimeline

SwiftRichString.playground/Contents.swift

@@ -0,0 +1,33 @@
+
+import UIKit
+import SwiftRichString
+import PlaygroundSupport
+
+// Create your own styles
+
+let normal = Style {
+    $0.font = SystemFonts.Helvetica_Light.font(size: 15)
+}
+
+let bold = Style {
+    $0.font = SystemFonts.Helvetica_Bold.font(size: 20)
+    $0.color = UIColor.red
+    $0.backColor = UIColor.yellow
+}
+
+let italic = normal.byAdding {
+    $0.traitVariants = .italic
+}
+
+// Create a group which contains your style, each identified by a tag.
+let myGroup = StyleGroup(base: normal, ["bold": bold, "italic": italic])
+
+// Use tags in your plain string
+let str = "Hello <bold>Daniele!</bold>. You're ready to <italic>play with us!</italic>"
+
+let attributedStringController = AttributedStringController()
+PlaygroundPage.current.liveView = attributedStringController
+
+attributedStringController.attributedString = str.set(style: myGroup)
+
+

SwiftRichString.playground/Sources/AttributedStringController.swift

@@ -0,0 +1,29 @@
+
+import UIKit
+
+public class AttributedStringController: UIViewController {
+
+    public var attributedString: NSAttributedString? {
+        get {
+            return textView?.attributedText
+        }
+        set {
+            textView?.attributedText = newValue
+        }
+    }
+
+    private var textView: UITextView?
+
+    public override func loadView() {
+        let view = UIView()
+        view.backgroundColor = .white
+
+        let textView = UITextView()
+        textView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        textView.attributedText = attributedString
+        view.addSubview(textView)
+        self.textView = textView
+
+        self.view = view
+    }
+}

SwiftRichString.playground/contents.xcplayground

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='ios'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

SwiftRichString.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>