Added loading state to button.

Author: ivanvorobei

Example Apps/SparrowKit.xcodeproj/xcshareddata/xcschemes/watchOS Example.xcscheme

@@ -54,46 +54,33 @@
       debugDocumentVersioning = "YES"
       debugServiceExtension = "internal"
       allowLocationSimulation = "YES">
-      <RemoteRunnable
-         runnableDebuggingMode = "2"
-         BundleIdentifier = "com.apple.Carousel"
-         RemotePath = "/(null)">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "F43F8319265791A0001D9B3D"
             BuildableName = "watchOS Example.app"
             BlueprintName = "watchOS Example"
             ReferencedContainer = "container:SparrowKit.xcodeproj">
          </BuildableReference>
-      </RemoteRunnable>
+      </BuildableProductRunnable>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
       shouldUseLaunchSchemeArgsEnv = "YES"
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
       debugDocumentVersioning = "YES">
-      <RemoteRunnable
-         runnableDebuggingMode = "2"
-         BundleIdentifier = "com.apple.Carousel"
-         RemotePath = "/(null)">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "F43F8319265791A0001D9B3D"
             BuildableName = "watchOS Example.app"
             BlueprintName = "watchOS Example"
             ReferencedContainer = "container:SparrowKit.xcodeproj">
          </BuildableReference>
-      </RemoteRunnable>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "F43F8319265791A0001D9B3D"
-            BuildableName = "watchOS Example.app"
-            BlueprintName = "watchOS Example"
-            ReferencedContainer = "container:SparrowKit.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
+      </BuildableProductRunnable>
    </ProfileAction>
    <AnalyzeAction
       buildConfiguration = "Debug">

Sources/SparrowKit/UIKit/Classes/Buttons/SPButton.swift

@@ -31,6 +31,10 @@ import UIKit
  */
 open class SPButton: UIButton {
 
+    // MARK: - Views
+    
+    internal var activityIndicatorView: UIActivityIndicatorView?
+    
     // MARK: - Init
 
     public init() {
@@ -56,6 +60,39 @@ open class SPButton: UIButton {
      */
     open func commonInit() {}
 
+    // MARK: - Public
+
+    open func setLoading(_ state: Bool) {
+        
+        // Validate
+        
+        if state {
+            if activityIndicatorView?.isAnimating ?? false { return }
+        } else {
+            if activityIndicatorView == nil { return }
+        }
+        
+        // Process
+        
+        let contentViews = subviews
+        
+        if state {
+            if activityIndicatorView == nil {
+                let activityIndicatorView = UIActivityIndicatorView()
+                addSubviews(activityIndicatorView)
+                self.activityIndicatorView = activityIndicatorView
+            }
+            contentViews.forEach({ $0.isHidden = true })
+            activityIndicatorView?.startAnimating()
+            layoutSubviews()
+        } else {
+            contentViews.forEach({ $0.isHidden = false })
+            activityIndicatorView?.stopAnimating()
+            activityIndicatorView?.removeFromSuperview()
+            activityIndicatorView = nil
+        }
+    }
+    
     // MARK: - Layout
 
     /**
@@ -68,6 +105,9 @@ open class SPButton: UIButton {
 
     open override func layoutSubviews() {
         super.layoutSubviews()
+        
+        activityIndicatorView?.setToCenter()
+        
         if let inset = titleImageInset {
             if imageView?.image == nil {
                 imageEdgeInsets.right = 0