1 .h文件

#import 
    
     @class AKTabBar;@interface AKTabBar : UITabBar@end
    

2 .m文件

#import "AKTabBar.h"@interface AKTabBar ()@end@implementation AKTabBar- (void)layoutSubviews{        [super layoutSubviews];        self.tintColor = GROUND_COLOR(84, 165, 72, 1);    CGFloat tabBarButtonW = self.width/5;    CGFloat tabBarIndex = 0;        for (UIView *child in self.subviews){                Class class = NSClassFromString(@"UITabBarButton");        if ([child isKindOfClass:class]){                        if (tabBarIndex == 2){                             self.tintColor = [UIColor blueColor];//you can setting color in here            }            child.x = tabBarIndex * tabBarButtonW;            child.width = tabBarButtonW;            tabBarIndex++;                    }    }    }