Sagit.Framework For IOS 自动布局教程：7、底部Tab栏

前言：

IOS的界面，分为：状态栏、导航栏、主界面、底部Tab状态栏。

本篇讲述底部Tab栏的相关操作。

1、Tab栏的高度定义

框架是自动布局和自适应的，所以提供了一个宏定义来表示Tab栏的高度：

当页面布局，需要用到导航栏高度的时候，就用：STTabHeightPx来使用。

2、Tab栏控制显示与隐藏

-(void)initUI
{
    [self needTabBar:NO];
}

参数控制显示或隐藏。

3、Tab栏的基本设置

一些基本属性设置【字体大小、背景色】，框架没有封装，所以下面给出原生的设置方法：

-(void)onInit
{
    //状态栏
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];//Start中字颜色为黑,这里改白
    [self.view.statusBar backgroundImage:@"circle_bg"];
   // [[sagit statusBar] backgroundColor:ColorBlue];
    //导航栏
    [[[[[[UINavigationBar globalSetting] barTintColor:MainColor] tintColor:ColorWhite] titleTextAttributes:@{NSForegroundColorAttributeName : ColorWhite}]
     translucent:NO] backgroundImage:@"circle_bg" stretch:YES];
    
    //设置TabBar
    NSMutableDictionary *attrs                    = [NSMutableDictionary dictionary];
    attrs[NSFontAttributeName]                    = STFont(24);// [UIFont systemFontOfSize:12];
    attrs[NSForegroundColorAttributeName]         = Main_TabFontColor;// [UIColor hex:@"#525050"];
    
    NSMutableDictionary *selectedAttrs            = [NSMutableDictionary dictionary];
    selectedAttrs[NSFontAttributeName]            =STFont(24);// [UIFont systemFontOfSize:12];
    selectedAttrs[NSForegroundColorAttributeName] = MainColor;
    
    if(AppProdType==4)//IT连是黑色底
    {
        [[UITabBar appearance] setBarTintColor:ColorBlack];
        [UITabBar appearance].translucent = NO;
    }
    // 拿到UITabBarItem的appearance
    UITabBarItem *tabBar                            = [UITabBarItem appearance];
  
   
    [tabBar setTitleTextAttributes:attrs forState:UIControlStateNormal];//默认时
    [tabBar setTitleTextAttributes:selectedAttrs forState:UIControlStateSelected];//选择时
    tabBar.titlePositionAdjustment                  = UIOffsetMake(0, -3);
    
}

4、一些Tab相关示例代码

-(UINavigationController*)create:(NSString*)controllerName title:(NSString*)title icon:(NSString*)icon
{
    return [[[[STNew(controllerName) tabTitle:title] tabImage:STString(@"menu_%@",icon)] tabSelectedImage:STString(@"menu_%@_select",icon)] toUINavigationController];
}
- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController
{
        Class c= [((UINavigationController*)viewController).viewControllers[0] class];
        if([NSStringFromClass(c) eq:@"MyController"])
        {
          [Sagit.MsgBox alert:STString(@"点击了“我的”菜单!") title:@"温馨提示" okText:@"我知道了"];
        }
    return YES;
}
- (void)initUI{
  
    UINavigationController *findLove=[self create:@"Find" title:Menu_Love icon:@"love"];
    UINavigationController *circle=[self create:@"Topic" title:Menu_Topic icon:@"topic"];
    UINavigationController *magic=[self create:@"Magic" title:Menu_Magic icon:@"magic"];
    UINavigationController *news=[self create:@"ChatList" title:Menu_Chat icon:@"chat"];
    UINavigationController *my=[self create:@"My" title:Menu_My icon:@"my"];
   [self setViewControllers:@[findLove,news,magic,circle,my] animated:animated];

}