目录 1、CJRadioButtons 单选按钮的组合

2、CJCycleComposeView 单选视图

3、CJButtonControllerView 类似网易新闻左右滑动的控制器的“父类”（为1和2的结合使用）

循环滚动的视图组合

• 方案①：5 1 2 3 4 5 1
• 方案②：Left:center:right
• 方案③：SDCycleScrollView

其他参考：图片轮播图浅析

一、CJRadioButtons

单选按钮的组合

屏幕截图

如何使用

• RadioButtons（"组合按钮"）的使用

//①、初始化如下：
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    self.view.backgroundColor = [UIColor lightGrayColor];
    
    self.titles =  @[@"Home1第一页", @"Home2", @"Home3是佛恩", @"Home4天赐的爱", @"Home5你是礼物", @"Home6", @"Home7", @"Home8", @"Home9", @"Home10", @"Home11", @"Home12", @"Home13", @"Home14", @"Home15"];

    self.sliderRadioButtons.dataSource = self;
    self.sliderRadioButtons.delegate = self;
}


//②实现数据源 `RadioButtonsDataSource `
- (NSInteger)cj_numberOfComponentsInRadioButtons:(RadioButtons *)radioButtons {
    return self.titles.count;
}

- (CGFloat)cj_radioButtons:(RadioButtons *)radioButtons widthForComponentAtIndex:(NSInteger)index  {
    NSInteger showViewCount = 6;
    CGFloat sectionWidth = CGRectGetWidth(radioButtons.frame)/showViewCount;
    return ceilf(sectionWidth); 
}

- (RadioButton *)cj_radioButtons:(RadioButtons *)radioButtons cellForComponentAtIndex:(NSInteger)index {
    NSArray *radioButtonNib = [[NSBundle mainBundle]loadNibNamed:@"RadioButton_Slider" owner:nil options:nil];
    RadioButton *radioButton = [radioButtonNib lastObject];
    [radioButton setTitle:self.titles[index]];
    radioButton.textNormalColor = [UIColor blackColor];
    radioButton.textSelectedColor = [UIColor greenColor];
    
    return radioButton;
}

//③实现数据委托 `RadioButtonsDelegate`
- (void)cj_radioButtons:(RadioButtons *)radioButtons chooseIndex:(NSInteger)index_cur oldIndex:(NSInteger)index_old {
    NSLog(@"index_old = %ld, index_cur = %ld", index_old, index_cur);
}

** 重要注意 **：- (CGFloat)cj_radioButtons:(RadioButtons *)radioButtons widthForComponentAtIndex:(NSInteger)index中的宽度计算如果是通过除法得来，即当使用除法计算width时，为了避免计算结果受除法余数太多，无法整除（例如：102.66666666666667），在通过左右箭头点击来寻找”要找的按钮“的时候，计算出现问题时（”要找的按钮“需与“左右侧箭头的最左最右侧值”进行精确的比较），因此这里我们需要一个整数值，所以我们选择向上取整。

二、CJCycleComposeView

//1、初始化
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    
    self.componentViewControllers = [self getComponentViewControllers];
    
    self.radioComposeView.dataSource = self;
    self.radioComposeView.delegate = self;
}

- (void)viewDidLayoutSubviews {
    [super viewDidLayoutSubviews];
    
    [self.radioComposeView scrollToCenterViewWithAnimate:NO];
}

//2、实现数据源 `RadioComposeViewDataSource`
- (NSArray<UIView *> *)cj_radioViewsInRadioComposeView:(RadioComposeView *)radioComposeView {
    NSArray *componentViewControllers = self.componentViewControllers;
    
    NSMutableArray *views = [[NSMutableArray alloc] init];
    for (UIViewController *vc in componentViewControllers) {
        [views addObject:vc.view];
        [self addChildViewController:vc];//记得添加进去
    }
    
    return views;
}

//3、实现数据委托 `RadioComposeViewDelegate`
- (void)cj_radioComposeView:(RadioComposeView *)radioComposeView didChangeToIndex:(NSInteger)index {
    NSLog(@"点击了%ld", index);
}

三、CJButtonControllerView

类似于网易新闻左右滑动的控制器的“父类”

ScrollView循环滚动的原理

**原理：**初始化时，生成左、中、右视图，并为左、中、右视图附加正确的视图内容。之后，就是滚动时的处理。这里滚动时的处理为：在滚动过程中，显示的视图仍然是这一轮生成的视图。但是滚动结束后，我们需要进行一次“偷梁换柱”，即：滚动结束后，将这一次左、中、右视图上的视图全部移除，并重新为左、中、右视图附上新的视图，同时将scrollView滚动到这一轮视图应该滚动的位置，也就是中视图的位置。这样就会让用户看不出来，其实我们已经进行了一次视图的重新改变，只是改变后显示的内容位置刚好覆盖了上一次的内容，而用户没有察觉到，最后大功告成。

//①、初始化
@property (nonatomic, strong) IBOutlet CJButtonControllerView *buttonControllerView;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    
    self.buttonControllerView.titles =  @[@"Home1第一页", @"Home2", @"Home3是佛恩", @"Home4天赐的爱", @"Home5你是礼物", @"Home6"];
    self.buttonControllerView.componentViewControllers = [self getComponentViewControllers];
    self.buttonControllerView.componentViewParentViewController = self;
    
    self.buttonControllerView.dataSource = self;
    self.buttonControllerView.delegate = self;
    [self.buttonControllerView reloadData];
}

②实现数据源 `CJButtonControllerViewDataSource`
- (RadioButton *)cj_buttonControllerView:(CJButtonControllerView *)buttonControllerView cellForComponentAtIndex:(NSInteger)index {
    NSArray *radioButtonNib = [[NSBundle mainBundle]loadNibNamed:@"RadioButton_Slider" owner:nil options:nil];
    RadioButton *radioButton = [radioButtonNib lastObject];
    
    radioButton.textNormalColor = [UIColor blackColor];
    radioButton.textSelectedColor = [UIColor whiteColor];
    
    return radioButton;
}

//③实现数据委托 `CJButtonControllerViewDelegate`
- (void)cj_buttonControllerView:(CJButtonControllerView *)buttonControllerView didChangeToIndex:(NSInteger)index {
    NSLog(@"didChangeToIndex = %ld", index);
}

完