Change progress indicator to be a progress bar instead of the activity indicator.

iOS/Progress/NavigationProgressView.swift

@@ -0,0 +1,132 @@
+//
+//  NavigationProgressView.swift
+//  KYNavigationProgress
+//
+//  Created by kyo__hei on 2015/12/29.
+//  Copyright (c) 2015 kyo__hei. All rights reserved.
+//
+// Original project: https://github.com/ykyouhei/KYNavigationProgress
+
+import UIKit
+
+public final class NavigationProgressView: UIView {
+	
+	/* ====================================================================== */
+	// MARK: - Properties
+	/* ====================================================================== */
+	
+	internal var progress: Float = 0 {
+		didSet {
+			progress = min(1, progress)
+			barWidthConstraint.constant = bounds.width * CGFloat(progress)
+		}
+	}
+	
+	internal let bar = UIView()
+	
+	@objc public dynamic var progressTintColor: UIColor? = UIColor(red: 0, green: 122/255, blue: 1, alpha: 1) {
+		didSet {
+			bar.backgroundColor = progressTintColor
+		}
+	}
+	
+	@objc public dynamic var trackTintColor: UIColor? = .clear {
+		didSet {
+			backgroundColor = trackTintColor
+		}
+	}
+	
+	fileprivate let barWidthConstraint: NSLayoutConstraint
+	
+	override public var frame: CGRect {
+		didSet {
+			let tmpProgress = progress
+			progress = tmpProgress
+		}
+	}
+	
+	
+	/* ====================================================================== */
+	// MARK: - initializer
+	/* ====================================================================== */
+	
+	required public init?(coder aDecoder: NSCoder) {
+		fatalError("init(coder:) has not been implemented")
+	}
+	
+	override init(frame: CGRect) {
+		barWidthConstraint = NSLayoutConstraint(
+			item: bar,
+			attribute: .width,
+			relatedBy: .equal,
+			toItem: nil,
+			attribute: .notAnAttribute,
+			multiplier: 1,
+			constant: frame.width * CGFloat(progress))
+		
+		super.init(frame: frame)
+		
+		let leftConstraint = NSLayoutConstraint(
+			item: bar,
+			attribute: .left,
+			relatedBy: .equal,
+			toItem: self,
+			attribute: .left,
+			multiplier: 1,
+			constant: 0)
+		
+		let bottomConstraint = NSLayoutConstraint(
+			item: bar,
+			attribute: .bottom,
+			relatedBy: .equal,
+			toItem: self,
+			attribute: .bottom,
+			multiplier: 1,
+			constant: 0)
+		
+		let topConstraint = NSLayoutConstraint(
+			item: bar,
+			attribute: .top,
+			relatedBy: .equal,
+			toItem: self,
+			attribute: .top,
+			multiplier: 1,
+			constant: 0)
+		
+		addSubview(bar)
+		
+		backgroundColor = trackTintColor
+		
+		bar.backgroundColor = progressTintColor
+		bar.translatesAutoresizingMaskIntoConstraints = false
+		addConstraints([
+			barWidthConstraint,
+			leftConstraint,
+			topConstraint,
+			bottomConstraint])
+	}
+	
+	
+	/* ====================================================================== */
+	// MARK: - Notification
+	/* ====================================================================== */
+	
+	func deviceDidRotate(_ notification: Notification) {
+	}
+	
+	
+	/* ====================================================================== */
+	// MARK: - Method
+	/* ====================================================================== */
+	
+	internal func setProgress(_ progress: Float, animated: Bool) {
+		let duration: TimeInterval = animated ? 0.1 : 0
+		
+		self.progress = progress
+		
+		UIView.animate(withDuration: duration, animations: {
+			self.layoutIfNeeded()
+		})
+	}
+	
+}