# BCTabbarDemo

**Repository Path**: binderclip/BCTabbarDemo

## Basic Information

- **Project Name**: BCTabbarDemo
- **Description**: 使用 Tabbar 的小练习记录，防止忘记。
- **Primary Language**: Objective-C
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2015-03-04
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

#BCTabbarDemo

## 简单实现 TabBarController 

先创建 ViewController，然后设置各自的 UITabBarItem，最后把 ViewController 放在数组里面，交给 TabBarController。

```
- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor cyanColor];
    
    AViewController *avc = [[AViewController alloc] init];
    BViewController *bvc = [[BViewController alloc] init];
    CViewController *cvc = [[CViewController alloc] init];
    DViewController *dvc = [[DViewController alloc] init];
    
    UITabBarItem *aItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemBookmarks tag:0];
    UITabBarItem *bItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemContacts tag:1];
    UITabBarItem *cItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFavorites tag:2];
    UITabBarItem *dItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemDownloads tag:3];

    avc.tabBarItem = aItem;
    bvc.tabBarItem = bItem;
    cvc.tabBarItem = cItem;
    dvc.tabBarItem = dItem;
    
    self.viewControllers = @[avc, bvc, cvc, dvc];
}
```

![](./imgs/out.png)

## 使用自定义的 TabBarItem

做下面的修改：

```
    NSArray *imageNames = @[@"tabbar_home", @"tabbar_invest", @"tabbar_me", @"tabbar_more"];
    
    UITabBarItem *aItem = [[UITabBarItem alloc] initWithTitle:@"首页" image:[UIImage imageNamed:imageNames[0]] tag:0];
    UITabBarItem *bItem = [[UITabBarItem alloc] initWithTitle:@"投资" image:[UIImage imageNamed:imageNames[1]] tag:1];
    UITabBarItem *cItem = [[UITabBarItem alloc] initWithTitle:@"我" image:[UIImage imageNamed:imageNames[2]] tag:2];
    UITabBarItem *dItem = [[UITabBarItem alloc] initWithTitle:@"设置" image:[UIImage imageNamed:imageNames[3]] tag:3];
```

![](./imgs/out1.png)

可以看到底部的图片颜色在选中状态有自动变化，但是这次想用实心的，所以再改一下。

![](./imgs/out2.png)