Add function to return random array element

Returns a random element from the array. Can be used to create a playful message that cycles randomly through a set of emoji icons, for example.

Author: wtmoose

Demo/Demo/ExploreViewController.swift

@@ -49,7 +49,8 @@ class ExploreViewController: UITableViewController, UITextFieldDelegate {
         case 3:
             view.configureTheme(.Error, iconStyle: iconStyle)
         default:
-            view.configureTheme(backgroundColor: UIColor.purpleColor(), foregroundColor: UIColor.whiteColor(), iconImage: nil, iconText: "🐸")
+            let iconText = ["🐸", "🐷", "🐬", "🐠", "🐍", "🐹", "🐼"].sm_random()
+            view.configureTheme(backgroundColor: UIColor.purpleColor(), foregroundColor: UIColor.whiteColor(), iconImage: nil, iconText: iconText)
             view.button?.setImage(Icon.ErrorSubtle.image, forState: .Normal)
             view.button?.setTitle(nil, forState: .Normal)
             view.button?.backgroundColor = UIColor.clearColor()

Demo/Pods/Pods.xcodeproj/project.pbxproj

@@ -26,6 +26,7 @@
 		86BBA9061D5E040C00FE8F16 /* Identifiable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 864495551D4F7C390056EB2A /* Identifiable.swift */; };
 		86BBA9071D5E040C00FE8F16 /* MarginAdjustable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 86AAF81D1D5549680031EE32 /* MarginAdjustable.swift */; };
 		86BBA9081D5E040C00FE8F16 /* Error.swift in Sources */ = {isa = PBXBuildFile; fileRef = 86AAF82A1D580DD70031EE32 /* Error.swift */; };
+		86DBE0041D75BE800071E51D /* Array+Utils.swift in Sources */ = {isa = PBXBuildFile; fileRef = 86DBE0031D75BE800071E51D /* Array+Utils.swift */; };
 		E6E49F911D70A344006CB883 /* MessageView.xib in Resources */ = {isa = PBXBuildFile; fileRef = 862C0CDA1D5A397F00D06168 /* MessageView.xib */; };
 		E6E49F921D70A349006CB883 /* StatusLine.xib in Resources */ = {isa = PBXBuildFile; fileRef = 862C0CDB1D5A397F00D06168 /* StatusLine.xib */; };
 		E6E49F931D70A34C006CB883 /* MessageViewIOS8.xib in Resources */ = {isa = PBXBuildFile; fileRef = 862C0CE21D5A3A0D00D06168 /* MessageViewIOS8.xib */; };
@@ -70,6 +71,7 @@
 		86B48AFA1D5A41C900063E2B /* SwiftMessagesTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SwiftMessagesTests.swift; sourceTree = "<group>"; };
 		86B48AFC1D5A41C900063E2B /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		86BBA8F81D5E01FC00FE8F16 /* CardView.xib */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = file.xib; name = CardView.xib; path = Resources/CardView.xib; sourceTree = "<group>"; };
+		86DBE0031D75BE800071E51D /* Array+Utils.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Array+Utils.swift"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -113,6 +115,7 @@
 				864495551D4F7C390056EB2A /* Identifiable.swift */,
 				86AAF81D1D5549680031EE32 /* MarginAdjustable.swift */,
 				86AAF82A1D580DD70031EE32 /* Error.swift */,
+				86DBE0031D75BE800071E51D /* Array+Utils.swift */,
 			);
 			name = Base;
 			sourceTree = "<group>";
@@ -309,6 +312,7 @@
 				86589D471D64B6E40041676C /* BaseView.swift in Sources */,
 				86BBA9071D5E040C00FE8F16 /* MarginAdjustable.swift in Sources */,
 				867BED211D622793005212E3 /* BackgroundViewable.swift in Sources */,
+				86DBE0041D75BE800071E51D /* Array+Utils.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

SwiftMessages.xcodeproj/project.pbxproj

@@ -0,0 +1,21 @@
+//
+//  Array+Utils.swift
+//  SwiftMessages
+//
+//  Created by Tim Moose on 8/30/16.
+//  Copyright © 2016 SwiftKick Mobile. All rights reserved.
+//
+
+import Darwin
+
+public extension Array {
+    
+    /**
+     Returns a random element from the array. Can be used to create a playful
+     message that cycles randomly through a set of emoji icons, for example.
+     */
+    public func sm_random() -> Generator.Element? {
+        guard count > 0 else { return nil }
+        return self[Int(arc4random_uniform(UInt32(count)))]
+    }
+}