如何更改默认蓝色的tabbar图标颜色？

Question

我有四个标签.我能够将标签图标颜色从默认的蓝色更改为红色(或者可能是任何颜色),并且它可以完美地运行.问题是它只适用于三个tabbaritems,最后一个是默认蓝色.下面是代码.我正在编写此rootviewcontrollerAppDelegate.m代码您可以通过在appdelegate中粘贴以下代码来尝试此操作.你们能帮助我吗？我会非常感激!

@implementation UITabBar (ColorExtensions)

- (void)recolorItemsWithColor:(UIColor *)color shadowColor:(UIColor *)shadowColor shadowOffset:(CGSize)shadowOffset shadowBlur:(CGFloat)shadowBlur

{

CGColorRef cgColor = [color CGColor];

 CGColorRef cgShadowColor = [shadowColor CGColor];

for (UITabBarItem *item in [self items])

 if ([item respondsToSelector:@selector(selectedImage)] &&

    [item respondsToSelector:@selector(setSelectedImage:)] &&

       [item respondsToSelector:@selector(_updateView)])

{

CGRect contextRect;

  contextRect.origin.x = 0.0f;

 contextRect.origin.y = 0.0f;

 contextRect.size = [[item selectedImage] size];
            // Retrieve source image and begin image context

 UIImage *itemImage = [item image];

 CGSize itemImageSize = [itemImage size];

 CGPoint itemImagePosition; 

 itemImagePosition.x = ceilf((contextRect.size.width - itemImageSize.width) / 2);

  itemImagePosition.y = ceilf((contextRect.size.height - itemImageSize.height) / 2);

 UIGraphicsBeginImageContext(contextRect.size);

  CGContextRef c = UIGraphicsGetCurrentContext();
            // Setup shadow

  CGContextSetShadowWithColor(c, shadowOffset, shadowBlur, cgShadowColor);
            // Setup transparency layer and clip to mask

  CGContextBeginTransparencyLayer(c, NULL);

 CGContextScaleCTM(c, 1.0, -1.0);

 CGContextClipToMask(c, CGRectMake(itemImagePosition.x, -itemImagePosition.y, 

    itemImageSize.width, -itemImageSize.height), [itemImage CGImage]);
            // Fill and end the transparency layer

 CGContextSetFillColorWithColor(c, cgColor);

 contextRect.size.height = -contextRect.size.height;

    CGContextFillRect(c, contextRect);

  CGContextEndTransparencyLayer(c);
            // Set selected image and end context

  [item setSelectedImage:UIGraphicsGetImageFromCurrentImageContext()];

  UIGraphicsEndImageContext();
            // Update the view

 [item _updateView];

}

}
@end

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:    (NSDictionary *)launchOptions 
{    

    [[tabBarController tabBar] recolorItemsWithColor:[UIColor redColor] shadowColor:[UIColor blackColor] shadowOffset:CGSizeMake(0.0f, -1.0f) shadowBlur:3.0f];

    [self.window addSubview:tabBarController.view];

        [self.window makeKeyAndVisible];

        [self addTabBarArrow];

         return YES;
}

Answer 1

 [[UITabBar appearance] setSelectedImageTintColor:[UIColor redColor]];

Answer 2

自添加 tabbar-item 没问题，我测试了 4 个项目的代码；

但您的最后一个选项卡栏项目是系统选项卡栏项目（“....”“更多”项目），因此此代码可能没有用处；它只是不使用您设置的图像；