在所选标签栏项目上设置文本颜色

Question

I've created a tab bar application. I have four tabs; on the selected tab, I need to set the color red for tab title. How can i do that?

Thanks in advance.

Answer 1

Using the UIAppearance protocol (iOS5+) this is now possible, and actually pretty easy.

[UITabBarItem.appearance setTitleTextAttributes:@{
        UITextAttributeTextColor : [UIColor greenColor] } forState:UIControlStateNormal];

[UITabBarItem.appearance setTitleTextAttributes:@{
        UITextAttributeTextColor : [UIColor purpleColor] }     forState:UIControlStateSelected];

Please excuse the awful colors!

Answer 2

Just to clear things up a bit…

If you'd like to change the appearance for all tab bar items, use:

Objective-C :

[[UITabBarItem appearance] setTitleTextAttributes:@{UITextAttributeTextColor :[UIColor someColor]} forState:UIControlStateSelected];

Swift :

UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.someColor()], forState: .Selected)

However , if you just want to set the appearance of a single item do it like so:

Objective-C :

[self.tabBarItem setTitleTextAttributes:@{UITextAttributeTextColor :[UIColor someColor]} forState:UIControlStateSelected];

Swift :

tabBarItem.setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.someColor()], forState: .Selected)

Note : tabBarItem is a property on UIViewController . This means that while every UIViewController has this property, it may not be the tabBarItem you're looking for. This is often the case when your view controller is enclosed in a UINavigationController . In this instance, access the tabBarItem on the navigation controller not the one in it's root (or other) view controller.

Answer 3

This is what finally worked for me:

1)Selected text color

[[UIView appearance] setTintColor:someColor];

2)Unselected text(also changes image color)

[[UITabBar appearance] setTintColor:anotherColor];

Answer 4

This is the swift version :-

    for item in self.mainTabBar.items! {

    let unselectedItem: NSDictionary = [NSForegroundColorAttributeName: UIColor.whiteColor()]
    let selectedItem: NSDictionary = [NSForegroundColorAttributeName: UIColor.whiteColor()]
    item.setTitleTextAttributes(unselectedItem as? [String : AnyObject], forState: .Normal)
    item.setTitleTextAttributes(selectedItem as? [String : AnyObject], forState: .Selected)

    }

Answer 5

任何正在寻找Swift 4解决方案的人

UITabBarItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: .red], for: .selected)

Answer 6

If I understand your question correctly, you want to customize the color of the text on the UITabBarItem s. Unfortunately, it's really not that flexible. If you're intent on doing this (which, unless you've carefully considered the design with the help of a professional, I recommend against!), you'll have to do some really frightening things to get this to work.

I'd suggest iterating through the subviews of the UITabBar (as many levels as necessary), and looking for UILabel objects. If you find some, you can change their color. If you don't, that means that it is implemented differently (probably in a -drawRect: method somewhere); if this happens to be the case, you really ought to give up.

Best of luck on whatever you decide to do.

Answer 7

这可以通过-drawRect: ,但通过这样做，您的应用程序被App Store拒绝的可能性大大增加