我想以编程方式更新uitabbar的图像，但是当我更新图像时并没有更新
看起来重复???
这是我已经尝试过但没有成功的答案
UITabBarItem does not update image
UITabBar not showing selected item images in ios 7
how to programmatically change the tabbarItem's image
https://www.appcoda.com/ios-programming-how-to-customize-tab-bar-background-appearance/
Changing tab bar item image and text color iOS
好的，现在这是我的customTabbar代码
// CustomTabBarViewController.swift
// CustomTabBar
import UIKit
class CustomTabBarViewController: UITabBarController, CustomTabBarDataSource, CustomTabBarDelegate, UITabBarControllerDelegate , UISearchBarDelegate, UISearchDisplayDelegate {
var searchController: UISearchController!
let searchBar = UISearchBar()
var btnBarBadge : MJBadgeBarButton!
var btnBar : MJBadgeBarButton!
// @IBOutlet weak var menuButton: UIBarButtonItem!
// MARK: Properties
var meals = [CatModel]()
func onBagdeButtonClick() {
print("button Clicked \(self.btnBarBadge.badgeValue)")
}
func onBarCodeButtonClick() {
self.title = Localization("Categories")
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let subContentsVC = storyboard.instantiateViewController(withIdentifier: "Stores") as! Stores
self.navigationController?.pushViewController(subContentsVC, animated: true)
}
func buttonClicked(_ sender: AnyObject?) {
var countt = Int(Constants.cartCount)
if(countt == nil){
countt = 0
}
if(countt!<1){
let alert = UIAlertController(title: Localization("Warning"), message:Localization("YourCartisEmpty"), preferredStyle: .alert)
alert.addAction(UIAlertAction(title: Localization("Ok"), style: .default) { _ in })
self.present(alert, animated: true){}
}else{
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let subContentsVC = storyboard.instantiateViewController(withIdentifier: "Cart") as! Cart
self.navigationController?.pushViewController(subContentsVC, animated: true)
}
}
func searchBarSearchButtonClicked( _ searchBar: UISearchBar)
{
print(searchBar.text ?? "this is value")
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let subContentsVC = storyboard.instantiateViewController(withIdentifier: "SearchProduct") as! SearchProduct
subContentsVC.stringPassed = searchBar.text!
self.navigationController?.pushViewController(subContentsVC, animated: true)
}
func actOnSpecialNotificationon() {
searchBar.placeholder = Localization("Search")
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
self.tabBar.isHidden = true
self.selectedIndex = 1
self.delegate = self
searchBar.sizeToFit()
searchBar.delegate = self
self.title = Localization("Categories")
searchBar.placeholder = Localization("Search")
searchBar.tintColor = .black
navigationItem.titleView = searchBar
NotificationCenter.default.addObserver(self, selector: #selector(CustomTabBarViewController.actOnSpecialNotificationon), name: NSNotification.Name(rawValue: mySpecialNotificationKey), object: nil)
let customTabBar = CustomTabBar(frame: self.tabBar.frame)
customTabBar.datasource = self
customTabBar.delegate = self
customTabBar.setup()
self.view.addSubview(customTabBar)
let customButton = UIButton(type: UIButtonType.custom)
customButton.frame = CGRect(x: 0, y: 0, width: 5.0, height: 35.0)
customButton.addTarget(self, action: #selector(self.onBagdeButtonClick), for: .touchUpInside)
customButton.setImage(UIImage(named: "Cart"), for: .normal)
let barcodeButton = UIButton(type: UIButtonType.custom)
barcodeButton.frame = CGRect(x: 0, y: 0, width: 35.0, height: 35.0)
barcodeButton.addTarget(self, action: #selector(self.onBarCodeButtonClick), for: .touchUpInside)
barcodeButton.setImage(UIImage(named: "edit_location"), for: .normal)
self.btnBarBadge = MJBadgeBarButton()
self.btnBar = MJBadgeBarButton()
self.btnBarBadge.setup(customButton: customButton)
self.btnBarBadge.removeBadge()
self.btnBar.setup(customButton: barcodeButton)
self.btnBar.removeBadge()
self.btnBarBadge.badgeValue = "0"
self.btnBarBadge.badgeOriginX = 2.0
self.btnBarBadge.badgeOriginY = -4
self.navigationItem.rightBarButtonItem = self.btnBarBadge
self.navigationItem.rightBarButtonItems = [self.btnBarBadge,self.btnBar]
customButton.addTarget(self, action: #selector(CustomTabBarViewController.buttonClicked(_:)), for: .touchUpInside)
}
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.setNavigationBarItem()
self.btnBarBadge.badgeValue = Constants.cartCount
}
// MARK: - CustomTabBarDataSource
func tabBarItemsInCustomTabBar(_ tabBarView: CustomTabBar) -> [UITabBarItem] {
return tabBar.items!
}
// MARK: - CustomTabBarDelegate
func didSelectViewController(_ tabBarView: CustomTabBar, atIndex index: Int) {
if(index == 0){
self.openLeftMenu()
}else{
self.selectedIndex = index
}
for loop in 0..<(self.tabBar.items?.count)!{
let barbutton = self.tabBar.items![loop]
if(index == loop){
barbutton.image = self.updateImageColor(origImage: barbutton.image!, color: .green)
}else{
barbutton.image = self.updateImageColor(origImage: barbutton.image!, color: .lightGray)
}
}
}
func updateImageColor(origImage:UIImage,color:UIColor)->UIImage{
let tintedImage = origImage.withRenderingMode(.alwaysOriginal)
let imageview = UIImageView(image: tintedImage)
imageview.tintColor = color
return imageview.image!
}
// MARK: - UITabBarControllerDelegate
func tabBarController(_ tabBarController: UITabBarController, animationControllerForTransitionFrom fromVC: UIViewController, to toVC: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return CustomTabAnimatedTransitioning()
}
}
这是CustomTabBar.swift的代码
//
// CustomTabBar.swift
// CustomTabBar
//
import UIKit
protocol CustomTabBarDataSource {
func tabBarItemsInCustomTabBar(_ tabBarView: CustomTabBar) -> [UITabBarItem]
}
protocol CustomTabBarDelegate {
func didSelectViewController(_ tabBarView: CustomTabBar, atIndex index: Int)
}
class CustomTabBar: UIView {
var datasource: CustomTabBarDataSource!
var delegate: CustomTabBarDelegate!
var tabBarItems: [UITabBarItem]!
var customTabBarItems: [CustomTabBarItem]!
var tabBarButtons: [UIButton]!
var initialTabBarItemIndex: Int!
var selectedTabBarItemIndex: Int!
var slideMaskDelay: Double!
var slideAnimationDuration: Double!
var tabBarItemWidth: CGFloat!
var leftMask: UIView!
var rightMask: UIView!
override init(frame: CGRect) {
super.init(frame: frame)
self.backgroundColor = UIColor.white
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func setup() {
// get tab bar items from default tab bar
tabBarItems = datasource.tabBarItemsInCustomTabBar(self)
customTabBarItems = []
tabBarButtons = []
initialTabBarItemIndex = 1
selectedTabBarItemIndex = initialTabBarItemIndex
slideAnimationDuration = 0.6
slideMaskDelay = slideAnimationDuration / 2
let containers = createTabBarItemContainers()
createTabBarItemSelectionOverlay(containers)
createTabBarItemSelectionOverlayMask(containers)
createTabBarItems(containers)
}
func createTabBarItemSelectionOverlay(_ containers: [CGRect]) {
let activeColor = UIColor(red: 109/255, green: 187/255, blue: 16/255, alpha: 1.0)
let overlayColors = [activeColor, activeColor, activeColor, activeColor,activeColor]
for index in 0..<tabBarItems.count {
let container = containers[index]
let view = UIView(frame: container)
let selectedItemOverlay = UIView(frame: CGRect(x: 0, y: 0, width: self.frame.width, height: self.frame.height))
selectedItemOverlay.backgroundColor = overlayColors[index] //.clear
view.addSubview(selectedItemOverlay)
tabBarItems[index].selectedImage = updateImageColor(origImage: tabBarItems[index].image!, color: .green)
self.addSubview(view)
}
}
func updateImageColor(origImage:UIImage,color:UIColor)->UIImage{
let tintedImage = origImage.withRenderingMode(.alwaysTemplate)
let imageview = UIImageView(image: tintedImage)
imageview.tintColor = color
return imageview.image!
}
func createTabBarItemSelectionOverlayMask(_ containers: [CGRect]) {
tabBarItemWidth = self.frame.width / CGFloat(tabBarItems.count)
let leftOverlaySlidingMultiplier = CGFloat(initialTabBarItemIndex) * tabBarItemWidth
let rightOverlaySlidingMultiplier = CGFloat(initialTabBarItemIndex + 1) * tabBarItemWidth
leftMask = UIView(frame: CGRect(x: 0, y: 0, width: leftOverlaySlidingMultiplier, height: self.frame.height))
leftMask.backgroundColor = UIColor.white
rightMask = UIView(frame: CGRect(x: rightOverlaySlidingMultiplier, y: 0, width: tabBarItemWidth * CGFloat(tabBarItems.count - 1), height: self.frame.height))
rightMask.backgroundColor = UIColor.white
self.addSubview(leftMask)
self.addSubview(rightMask)
}
func createTabBarItems(_ containers: [CGRect]) {
var index = 0
for item in tabBarItems {
let container = containers[index]
let customTabBarItem = CustomTabBarItem(frame: container)
customTabBarItem.setup(item)
self.addSubview(customTabBarItem)
customTabBarItems.append(customTabBarItem)
let button = UIButton(frame: CGRect(x: 0, y: 0, width: container.width, height: container.height))
button.addTarget(self, action: #selector(CustomTabBar.barItemTapped(_:)), for: UIControlEvents.touchUpInside)
customTabBarItem.addSubview(button)
tabBarButtons.append(button)
index += 1
}
self.customTabBarItems[initialTabBarItemIndex].iconView.tintColor = .green //UIColor.white
}
func createTabBarItemContainers() -> [CGRect] {
var containerArray = [CGRect]()
// create container for each tab bar item
for index in 0..<tabBarItems.count {
let tabBarContainer = createTabBarContainer(index)
containerArray.append(tabBarContainer)
}
return containerArray
}
func createTabBarContainer(_ index: Int) -> CGRect {
let tabBarContainerWidth = self.frame.width / CGFloat(tabBarItems.count)
let tabBarContainerRect = CGRect(x: tabBarContainerWidth * CGFloat(index), y: 0, width: tabBarContainerWidth, height: self.frame.height)
return tabBarContainerRect
}
func animateTabBarSelection(from: Int, to: Int) {
let overlaySlidingMultiplier = CGFloat(to - from) * tabBarItemWidth
let leftMaskDelay: Double
let rightMaskDelay: Double
if overlaySlidingMultiplier > 0 {
leftMaskDelay = slideMaskDelay
rightMaskDelay = 0
}
else {
leftMaskDelay = 0
rightMaskDelay = slideMaskDelay
}
UIView.animate(withDuration: slideAnimationDuration - leftMaskDelay, delay: leftMaskDelay, options: UIViewAnimationOptions(), animations: {
self.leftMask.frame.size.width += overlaySlidingMultiplier
}, completion: nil)
UIView.animate(withDuration: slideAnimationDuration - rightMaskDelay, delay: rightMaskDelay, options: UIViewAnimationOptions(), animations: {
self.rightMask.frame.origin.x += overlaySlidingMultiplier
self.rightMask.frame.size.width += -overlaySlidingMultiplier
self.customTabBarItems[from].iconView.tintColor = UIColor.black
self.customTabBarItems[to].iconView.tintColor = UIColor.white
}, completion: nil)
}
func barItemTapped(_ sender : UIButton) {
let index = tabBarButtons.index(of: sender)!
//tabBarItems[index].selectedImage = nil
//tabBarItems[index].image = nil
// tabBarItems[index].image = UIImage(named: "Home_Tab");
animateTabBarSelection(from: selectedTabBarItemIndex, to: index)
selectedTabBarItemIndex = index
delegate.didSelectViewController(self, atIndex: index)
}
}
当我尝试更改图像时没有任何反应
tabBarItems[index].image = UIImage(named: "Home_Tab")
tabBarItems[index].image = UIImage(named: "Home_Tab")?.withRenderingMode(.alwaysOriginal)
与所选图片相同
当我在 createTabBarItemSelectionOverlay 方法中设置图像时，它可以工作
我尝试删除图像并再次设置它，但没有成功 还尝试使用.alwaysOriginal渲染模式设置图像，没有运气
请帮助我在哪里做错了？
谢谢...将为您提供一点帮助