//
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// UITabBarExtensions.swift
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// SwifterSwift
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//
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// Created by Omar Albeik on 9/28/16.
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// Copyright © 2016 SwifterSwift
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//
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#if canImport(UIKit) && !os(watchOS)
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import UIKit
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// MARK: - Methods
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public extension UITabBar {
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/// SwifterSwift: Set tabBar colors.
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///
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/// - Parameters:
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/// - background: background color.
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/// - selectedBackground: background color for selected tab.
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/// - item: icon tint color for items.
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/// - selectedItem: icon tint color for item.
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func setColors(
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background: UIColor? = nil,
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selectedBackground: UIColor? = nil,
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item: UIColor? = nil,
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selectedItem: UIColor? = nil) {
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// background
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barTintColor = background ?? barTintColor
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// selectedItem
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tintColor = selectedItem ?? tintColor
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// shadowImage = UIImage()
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backgroundImage = UIImage()
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isTranslucent = false
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// selectedBackgoundColor
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guard let barItems = items else {
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return
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}
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if let selectedbg = selectedBackground {
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let rect = CGSize(width: frame.width/CGFloat(barItems.count), height: frame.height)
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selectionIndicatorImage = { (color: UIColor, size: CGSize) -> UIImage in
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UIGraphicsBeginImageContextWithOptions(size, false, 1)
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color.setFill()
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UIRectFill(CGRect(x: 0, y: 0, width: size.width, height: size.height))
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guard let image = UIGraphicsGetImageFromCurrentImageContext() else { return UIImage() }
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UIGraphicsEndImageContext()
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guard let aCgImage = image.cgImage else { return UIImage() }
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return UIImage(cgImage: aCgImage)
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}(selectedbg, rect)
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}
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if let itemColor = item {
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for barItem in barItems as [UITabBarItem] {
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// item
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guard let image = barItem.image else { continue }
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barItem.image = { (image: UIImage, color: UIColor) -> UIImage in
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UIGraphicsBeginImageContextWithOptions(image.size, false, image.scale)
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color.setFill()
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guard let context = UIGraphicsGetCurrentContext() else {
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return image
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}
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context.translateBy(x: 0, y: image.size.height)
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context.scaleBy(x: 1.0, y: -1.0)
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context.setBlendMode(CGBlendMode.normal)
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let rect = CGRect(x: 0, y: 0, width: image.size.width, height: image.size.height)
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guard let mask = image.cgImage else { return image }
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context.clip(to: rect, mask: mask)
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context.fill(rect)
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let newImage = UIGraphicsGetImageFromCurrentImageContext()!
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UIGraphicsEndImageContext()
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return newImage
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}(image, itemColor).withRenderingMode(.alwaysOriginal)
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barItem.setTitleTextAttributes([.foregroundColor: itemColor], for: .normal)
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if let selected = selectedItem {
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barItem.setTitleTextAttributes([.foregroundColor: selected], for: .selected)
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}
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}
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}
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}
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}
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#endif
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