UITabbarItem BadgeValue 文本颜色

Question

我的应用程序有问题。我在 UITabBar 中的一个选项卡上设置了一个徽章值。徽章值正确为红色，徽章值周围的圆圈正确为白色。问题是，文本的颜色是灰色（160、160、160）。它与正常状态 tabbaritem 文本的颜色相同，但我在应用程序代码中没有设置此颜色，我不知道此颜色来自何处。 几周以来，我在整个网络中搜索了该问题，但找不到任何解决方案。我到处找到的唯一答案是，无法更改徽章值文本的颜色。但如果不可能，为什么在我的应用程序中改变它？ 我希望有人可以帮助我解决这个问题...

• http://www.luventas-webdesign.de/stackoverflow/screenshot_badgevalue.png
• 就像我的应用程序中的颜色一样

• http://www.luventas-webdesign.de/stackoverflow/screenshot_like_it_should.png

• 颜色应该是正常的......

---

编辑 02.11.2012 - 代码

TabBarController 的创建：

#import "ExtendedTabBarController.h"
#import "configuration.h"

@implementation ExtendedTabBarController

- (void)viewDidLoad {
    [super viewDidLoad];
    [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys: [UIColor colorWithRed:207.0/255.0 green:70.0/255.0 blue:61.0/255.0 alpha:1], UITextAttributeTextColor, [UIFont fontWithName:@"KievitPro-Regular" size:10.0], UITextAttributeFont, nil] forState:UIControlStateSelected];

    [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys: [UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1], UITextAttributeTextColor, [UIFont fontWithName:@"KievitPro-Regular" size:10.0], UITextAttributeFont, nil] forState:UIControlStateNormal];

    [self.tabBar sizeToFit];

    UIView *tabbarBackgroundColorView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0, self.view.bounds.size.width, 49)];
    [tabbarBackgroundColorView setBackgroundColor:[UIColor colorWithRed:233.0/255.0 green:233.0/255.0 blue:233.0/255.0 alpha:1]];
    [self.tabBar insertSubview:tabbarBackgroundColorView atIndex:0];
}

- (void)viewDidUnload {
    [super viewDidUnload];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
}


- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return UIInterfaceOrientationIsPortrait(interfaceOrientation); // only portrait orientation

}

/**
 *  orientation for iOS6
 **/
-(NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskPortrait;
}

@end

在 AppDelegate 中调用：

ExtendedTabBarController *tabBarController = [[ExtendedTabBarController alloc] init];
[self setTabBarController:tabBarController];
[[UITabBar appearance] setBackgroundImage:[UIImage imageNamed:@"menu_bg"]];

// code for initialize View- and NavigationControllers...

self.tabBarController.viewControllers = @[highlightsNavigationController, categoryNavigationController, searchNavigationController, favoritesNavigationController, imprintNavigationController];

self.window.rootViewController = self.tabBarController;

[[UITabBar appearance] setSelectionIndicatorImage:[[UIImage alloc] init]];

设置徽章值：

int viewCount = 0;
NSUserDefaults * defs = [NSUserDefaults standardUserDefaults];
NSDictionary * dict = [defs dictionaryRepresentation];
for (id key in dict) {
    if([key rangeOfString:@"_highlighted"].location != NSNotFound && [[[dict objectForKey:key] objectAtIndex:0] isEqualToString:@"YES"]) {
        viewCount++;
    }
}
UITabBarItem *tbi = (UITabBarItem *)[self.tabBarController.tabBar.items objectAtIndex:3];
if(viewCount <= 0) {
    tbi.badgeValue = nil;
} else {
    tbi.badgeValue = nil;
    tbi.badgeValue = [NSString stringWithFormat:@"%d", viewCount];
}

覆盖 UILabel 的代码：

// -- file: UILabel+VerticalAlign.h
#pragma mark VerticalAlign
@interface UILabel (VerticalAlign)
- (void)alignTop;
- (void)alignBottom;
- (void)awakeFromNib;
-(id)initWithFrame:(CGRect)frame;
@end


#import "UILabel+VerticalAlign.h"

// -- file: UILabel+VerticalAlign.m
@implementation UILabel (VerticalAlign)
- (void)alignTop {
    CGSize fontSize = [self.text sizeWithFont:self.font];
    double finalHeight = fontSize.height * self.numberOfLines;
    double finalWidth = self.frame.size.width;    //expected width of label
    CGSize theStringSize = [self.text sizeWithFont:self.font constrainedToSize:CGSizeMake(finalWidth, finalHeight) lineBreakMode:self.lineBreakMode];
    int newLinesToPad = (finalHeight  - theStringSize.height) / fontSize.height;
    for(int i=0; i<newLinesToPad; i++)
        self.text = [self.text stringByAppendingString:@"\n "];
}

- (void)alignBottom {
    CGSize fontSize = [self.text sizeWithFont:self.font];
    double finalHeight = fontSize.height * self.numberOfLines;
    double finalWidth = self.frame.size.width;    //expected width of label
    CGSize theStringSize = [self.text sizeWithFont:self.font constrainedToSize:CGSizeMake(finalWidth, finalHeight) lineBreakMode:self.lineBreakMode];
    int newLinesToPad = (finalHeight  - theStringSize.height) / fontSize.height;
    for(int i=0; i<newLinesToPad; i++)
        self.text = [NSString stringWithFormat:@" \n%@",self.text];
}
- (void)awakeFromNib
{
    [super awakeFromNib];
    [self setFont:[UIFont fontWithName:@"KievitPro-Regular" size:12.0]];
}

-(id)initWithFrame:(CGRect)frame
{
    id result = [super initWithFrame:frame];
    if (result) {
        [self setFont:[UIFont fontWithName:@"KievitPro-Regular" size:12.0]];
    }
    return result;
}

@end

Answer 1

我自己找到了解决问题的方法：

我必须从覆盖的 UILabel 中删除以下行：

- (void)awakeFromNib
{
    [super awakeFromNib];
    [self setFont:[UIFont fontWithName:@"KievitPro-Regular" size:12.0]];
}

-(id)initWithFrame:(CGRect)frame
{
    id result = [super initWithFrame:frame];
    if (result) {
        [self setFont:[UIFont fontWithName:@"KievitPro-Regular" size:12.0]];
    }
    return result;
}

也许有人可以解释一下，为什么在我们关闭这篇文章之前，这行会改变徽章值的文本颜色？

Answer 2

不使用类别设置默认的 UILabel 字体，而是使用 UILabel 的外观方法设置字体：

[[UILabel appearance] setFont:[UIFont fontWithName:@"KievitPro-Regular" size:12.0]];

当我对此进行测试时，徽章的文本显示为正常的白色。