Added a animate for a while feature.

LinearProgressBarDemo/ViewController.swift

@@ -17,7 +17,8 @@ class ViewController: UIViewController {
 
         prepareNavigationController()
 
-        showProgressBar()
+        let view = showProgressBar(5)
+
     }
 }
 

Sources/LinearProgressBar.swift

@@ -108,6 +108,13 @@ open class LinearProgressBar: UIView {
         completion?()
     }
 
+    open func animateForAWhile(_ duration: TimeInterval) {
+        startAnimating()
+        DispatchQueue.main.asyncAfter(deadline: .now() + duration) {
+            self.stopAnimating()
+        }
+    }
+
     // MARK: - Private
 
     private func applyProgressAnimations() {

Sources/ProgressBar.swift

@@ -14,6 +14,11 @@ import UIKit
         return ProgressBar.showProgressBar(self.view)
     }
 
+    @discardableResult
+    func showProgressBar(_ duration: TimeInterval) -> UIView {
+        ProgressBar.showProgressBar(duration: duration, self.view)
+    }
+
     func hideProgressBar() {
         ProgressBar.removeAllProgressBars(self.view)
     }
@@ -79,4 +84,16 @@ open class ProgressBar: NSObject {
                 }
         }
     }
+
+    open class func showProgressBar(duration: TimeInterval,_ parentView: UIView) -> UIView {
+        let progressBar = LinearProgressBar()
+        progressBar.tag = progressBarViewTag
+
+        parentView.addSubview(progressBar)
+
+        Layout.toTop(progressBar)
+        progressBar.animateForAWhile(duration)
+
+        return progressBar
+    }
 }