navbar和tabbar自定义

- (void)customAppearance {
    
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
    [[UINavigationBar appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor whiteColor]}];
    //[[UINavigationBar appearance]setBackgroundColor:[UIColor colorWithRed:26.0/255 green:26.0/255 blue:129.0/255 alpha:1.0]];
    [[UINavigationBar appearance]setBackgroundImage:[UIImage imageNamed:@"navbar_bg"]forBarMetrics:UIBarMetricsDefault];
    if([UIDevice currentDevice].systemVersion.floatValue >= 8.0) {
        
        [[UINavigationBar appearance]setTranslucent:NO];
    }
    
    [[UINavigationBar appearance]setBarTintColor:[UIColor colorWithRed:26.0/255 green:26.0/255 blue:129.0/255 alpha:1.0]];
    
    //UIBarButton back button arrow color
    [[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];
    
    [[UITabBar appearance] setBarTintColor:[UIColor colorWithRed:26.0/255 green:26.0/255 blue:129.0/255 alpha:1.0]];
    [[UITabBar appearance]setTintColor:[UIColor whiteColor]];
    //iOS 7 tabBar-line, how to remove it?
    [[UITabBar appearance] setShadowImage:[[UIImage alloc] init]];
    //[[UITabBarItem appearance] setImageInsets:UIEdgeInsetsMake(-6, 0, 6, 0)];
    
}