Question

如何更改标签栏未选择的图标和文字的颜色？我找到了这个答案（How to change inactive icon/text color on tab bar?），但无法为swift实现它。

Answer 1

iOS 10

class TabBarVC: UITabBarController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // make unselected icons white
        self.tabBar.unselectedItemTintColor = UIColor.white
    }
}

Answer 2

以下设置所有UITabBarItem的默认值，您可以将其添加到AppDelegate。它会改变你的文字颜色。

UITabBarItem.appearance().setTitleTextAttributes({NSForegroundColorAttributeName: UIColor.blackColor()}, forState:.Selected)
UITabBarItem.appearance().setTitleTextAttributes({NSForegroundColorAttributeName: UIColor.whiteColor()}, forState:.Normal)

用于更改图标＆＃39;您可以将颜色设置为图像已经具有良好颜色的给定状态。

self.tabBarItem.selectedImage = [[UIImage imageNamed:@"selectedImage"]
imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

self.tabBarItem.image = [[UIImage imageNamed:@"notSelectedImage"] 
imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

或者你可以这样做：

为UIImage课程添加扩展程序（来自this answer）：

extension UIImage {
func imageWithColor(color1: UIColor) -> UIImage {
    UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)

    let context = UIGraphicsGetCurrentContext() as CGContextRef
    CGContextTranslateCTM(context, 0, self.size.height)
    CGContextScaleCTM(context, 1.0, -1.0);
    CGContextSetBlendMode(context, kCGBlendModeNormal)

    let rect = CGRectMake(0, 0, self.size.width, self.size.height) as CGRect
    CGContextClipToMask(context, rect, self.CGImage)
    color1.setFill()
    CGContextFillRect(context, rect)

    let newImage = UIGraphicsGetImageFromCurrentImageContext() as UIImage
    UIGraphicsEndImageContext()

    return newImage
}
}

在您的viewDidLoad：

中

for item in self.tabBar.items as [UITabBarItem] {
    if let image = item.image {
        item.image = image.imageWithColor(UIColor.blackColor()).imageWithRenderingMode(.AlwaysOriginal)
    }
}

Answer 3

在iOS 11中，您可以直接在情节提要中的UIToolBar上设置属性：

unselectedItemTintColor |颜色| [所需颜色]

Xcode打印

Screen Shot

Answer 4

补充@ BoilingLime的答案，这里是Swift 3中第二个替代版本的UIImage扩展：

extension UIImage {
func imageWithColor(color1: UIColor) -> UIImage {
    UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)

    let context = UIGraphicsGetCurrentContext()! as CGContext
    context.translateBy(x: 0, y: self.size.height)
    context.scaleBy(x: 1.0, y: -1.0);
    context.setBlendMode(CGBlendMode.normal)

    let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)
    context.clip(to: rect, mask: self.cgImage!)
    color1.setFill()
    context.fill(rect)

    let newImage = UIGraphicsGetImageFromCurrentImageContext()! as UIImage
    UIGraphicsEndImageContext()

    return newImage
}
}

Answer 5

如果您正在寻找iOS 11 swift 4解决方案，请在appDelegate中执行类似的操作。这会将所有未选中的选项卡栏项目更改为黑色。

public class MailNotification : INotification
{
    public void Send(INotificationBaseModel notification)
    {
        try
        {
            SmtpClient client = new SmtpClient();
            MailMessage mailMessage = new MailMessage();
            mailMessage.To.Add(notification.SendTo);
            mailMessage.Subject = notification.Title;
            mailMessage.Body = notification.Message;
            mailMessage.IsBodyHtml = true;
            client.Send(mailMessage);
        }
        catch (Exception ex)
        {
            throw new Exception("");
        }
    }
}

Answer 6

快速4 +

UITabBar.appearance().unselectedItemTintColor = UIColor.green

在appDelegate's didFinishLaunchingWithOptions方法中使用此代码。

如何在swift中更改标签栏未选中图标的颜色？

6 个答案: