如何在“標簽欄”色調顏色中設置2種不同的顏色？

Question

我有一個帶有圖像和標題的標簽欄。 如何將選定的選項卡欄項目圖像設置為漸變顏色？

當前

預期結果和原始選擇的圖像

我到目前為止所做的是：

- (void)viewDidLoad {
    [super viewDidLoad];

    [[UITabBar appearance] setTintColor:ThemeBlueColor];
}

是否有任何方法可以為[[UITabBar appearance] setTintColor:ThemeBlueColor];設置漸變顏色[[UITabBar appearance] setTintColor:ThemeBlueColor]; ？ 請幫忙。 謝謝。

Answer 1

我確實更改了選項卡按鈕屬性（如標題顏色）以及使用目標C代碼選擇和取消選擇的圖像，並使用Swiftify *提供了轉換后的代碼 。

在您的第一個ViewController的tabBarController的viewDidLoad（）中調用此方法，您很高興

請看一看 - ：

//  Converted with Swiftify v1.0.6472 - https://objectivec2swift.com/
func setTabBarSelectedDeselectedIconsAndTitleColor() {
    let recentItem = tabBarController?.tabBar.items[0] as? UITabBarItem
    recentItem?.setTitleTextAttributes([.foregroundColor: UIColor(red: 91.0 / 255.0, green: 46.0 / 255.0, blue: 224.0 / 255.0, alpha: 1.0)], for: .normal)
    recentItem?.setTitleTextAttributes([.foregroundColor: UIColor(red: 91.0 / 255.0, green: 46.0 / 255.0, blue: 224.0 / 255.0, alpha: 1.0)], for: .selected)
    recentItem?.image = UIImage(named: "home_unselect_icon.png")?.withRenderingMode(.alwaysOriginal)
    recentItem?.selectedImage = UIImage(named: "home_select_icon.png")?.withRenderingMode(.alwaysOriginal)
    recentItem = tabBarController?.tabBar.items[1]
    recentItem.setTitleTextAttributes([.foregroundColor: UIColor(red: 91.0 / 255.0, green: 46.0 / 255.0, blue: 224.0 / 255.0, alpha: 1.0)], for: .normal)
    recentItem.setTitleTextAttributes([.foregroundColor: UIColor(red: 91.0 / 255.0, green: 46.0 / 255.0, blue: 224.0 / 255.0, alpha: 1.0)], for: .selected)
    recentItem.image = UIImage(named: "kid_location_unselect_icon.png")?.withRenderingMode(.alwaysOriginal)
    recentItem.selectedImage = UIImage(named: "kid_location_select_icon.png")?.withRenderingMode(.alwaysOriginal)
}

類似的Objective-C等效項-：

-(void)setTabBarSelectedDeselectedIconsAndTitleColor{
    UITabBarItem *recentItem = self.tabBarController.tabBar.items[0];
    [recentItem setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor colorWithRed:91.0f/255.0f green:46.0f/255.0f blue:224.0f/255.0f alpha:1.0f]} forState:UIControlStateNormal];
    [recentItem setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor colorWithRed:91.0f/255.0f green:46.0f/255.0f blue:224.0f/255.0f alpha:1.0f]} forState:UIControlStateSelected];
    recentItem.image = [[UIImage imageNamed:@"home_unselect_icon.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    recentItem.selectedImage = [[UIImage imageNamed:@"home_select_icon.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

    recentItem = self.tabBarController.tabBar.items[1];
    [recentItem setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor colorWithRed:91.0f/255.0f green:46.0f/255.0f blue:224.0f/255.0f alpha:1.0f]} forState:UIControlStateNormal];
    [recentItem setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor colorWithRed:91.0f/255.0f green:46.0f/255.0f blue:224.0f/255.0f alpha:1.0f]} forState:UIControlStateSelected];
    recentItem.image = [[UIImage imageNamed:@"kid_location_unselect_icon.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    recentItem.selectedImage = [[UIImage imageNamed:@"kid_location_select_icon.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
}

Answer 2

您以漸變色獲取圖像資產，對於選定的圖像，只需分別設置該圖像或未選擇的圖像即可。