分页导航条目

自己封装的一个导航条目切换控制器方法
在.h中声明

-(instancetype)initWithSubViewControllers:(NSArray *)subViewControllers;

@property(nonatomic,copy)UIColor *btnTextNomalColor;
@property(nonatomic,copy)UIColor *btnTextSeletedColor;
@property(nonatomic,copy)UIColor *sliderColor;
@property(nonatomic,copy)UIColor *topBarColor;

在.m中实现

#import "HanboNavBarController.h"

#define ScreenW    [UIScreen mainScreen].bounds.size.width
#define ScreenH    [UIScreen mainScreen].bounds.size.height

@interface HanboNavBarController ()<UIScrollViewDelegate>
@property (nonatomic, weak) UIButton *oldBtn;
@property(nonatomic,strong)NSArray *VCArr;
@property (nonatomic, weak) UIScrollView *contentView;
@property (nonatomic, weak) UIScrollView *topBar;
@property(nonatomic,assign) CGFloat btnW ;

@property (nonatomic, weak) UIView *slider;

@end

@implementation HanboNavBarController
-(UIColor *)sliderColor
{
    if(_sliderColor == nil)
    {
        _sliderColor = [UIColor purpleColor];
    }
    return  _sliderColor;
}
-(UIColor *)btnTextNomalColor
{
    if(_btnTextNomalColor == nil)
    {
        _btnTextNomalColor = [UIColor grayColor];
    }
    return _btnTextNomalColor;
}
-(UIColor *)btnTextSeletedColor
{
    if(_btnTextSeletedColor == nil)
    {
        _btnTextSeletedColor = [UIColor blackColor];
    }
    return _btnTextSeletedColor;
}
-(UIColor *)topBarColor
{
    if(_topBarColor == nil)
    {
        _topBarColor = [UIColor whiteColor];
//       _topBarColor =  [UIColor colorWithRed:55 / 255.0 green:63 / 255.09 blue:80 / 255.0 alpha:1];
    }
    return _topBarColor;
}
-(instancetype)initWithSubViewControllers:(NSArray *)subViewControllers
{
    if(self = [super init])
    {
        _VCArr = subViewControllers;
    }
    return self;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    
    //添加上面的导航条
    [self addTopBar];
    
    //添加子控制器
    [self addVCView];
    
    //添加滑块
    [self addSliderView];
    

}
-(void)addSliderView
{
    if(self.VCArr.count == 0) return;

    UIView *slider = [[UIView alloc]initWithFrame:CGRectMake(0,41-64,self.btnW, 3)];
    slider.backgroundColor = self.sliderColor;
    [self.topBar addSubview:slider];
    self.slider = slider;
}
-(void)addTopBar
{
    if(self.VCArr.count == 0) return;
    NSUInteger count = self.VCArr.count;
    
    UIScrollView *scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, ScreenW, 44)];
    scrollView.backgroundColor = self.topBarColor;
    self.topBar = scrollView;
    self.topBar.bounces = NO;
    [self.view addSubview:self.topBar];
    
    if(count <= 5)
    {
         self.btnW = ScreenW / count;
    }else
    {
         self.btnW = ScreenW / 5.0;
    }
    //添加button
    for (int i=0; i<count; i++)
    {
        UIViewController *vc = self.VCArr[i];
        
        UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(i*self.btnW, -64, self.btnW, 44)];
        btn.tag = 10000+i;
        [btn setTitleColor:self.btnTextNomalColor forState:UIControlStateNormal];
        [btn setTitleColor:self.btnTextSeletedColor forState:UIControlStateSelected];
        [btn setTitle:vc.title forState:UIControlStateNormal];
        [btn addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];
        //文字大小
        btn.titleLabel.font    = [UIFont systemFontOfSize: 12];
        [self.topBar addSubview:btn];
        if(i == 0)
        {
            btn.selected = YES;
            //默认one文字放大
            btn.transform = CGAffineTransformMakeScale(1.2, 1.2);
            self.oldBtn = btn;

        }
    }
    self.topBar.contentSize = CGSizeMake(self.btnW *count, -64);
}
-(void)addVCView
{
    UIScrollView *contentView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0+44, ScreenW, ScreenH -44)];
    self.contentView = contentView;
    self.contentView.bounces = NO;
    contentView.delegate = self;
    contentView.backgroundColor = [UIColor lightGrayColor];
    [self.view addSubview:contentView];
    
    NSUInteger count = self.VCArr.count;
    for (int i=0; i<count; i++) {
        UIViewController *vc = self.VCArr[i];
        [self addChildViewController:vc];
        vc.view.frame = CGRectMake(i*ScreenW, 0, ScreenW, ScreenH -44);
        [contentView addSubview:vc.view];
    }
    contentView.contentSize = CGSizeMake(count*ScreenW, ScreenH-44);
    contentView.pagingEnabled = YES;
}
-(void)click:(UIButton *)sender
{
    if(sender.selected) return;
    self.oldBtn.selected = NO;
    sender.selected = YES;
    self.contentView.contentOffset = CGPointMake((sender.tag - 10000)*ScreenW, 0);
    [UIView animateWithDuration:0.3 animations:^{
        sender.transform = CGAffineTransformMakeScale(1.2, 1.2);
    }];
    self.oldBtn.transform = CGAffineTransformIdentity;
    self.oldBtn = sender;
    
    //判断导航条是否需要移动
    CGFloat maxX = CGRectGetMaxX(self.slider.frame);
    if(maxX >=ScreenW  && sender.tag != self.VCArr.count + 10000 - 1)
    {
        [UIView animateWithDuration:0.3 animations:^{
            self.topBar.contentOffset = CGPointMake(maxX - ScreenW + self.btnW, -64);
        }];
    }else if(maxX < DCScreenW)
    {
        [UIView animateWithDuration:0.3 animations:^{
            self.topBar.contentOffset = CGPointMake(0, -64);
        }];
    }
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    //滑动导航条
    self.slider.frame = CGRectMake(scrollView.contentOffset.x / ScreenW *self.btnW , 41-64, self.btnW, 3);
}
//判断是否切换导航条按钮的状态
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    CGFloat offX =  scrollView.contentOffset.x;
    int tag = (int)(offX /ScreenW + 0.5) + 10000;
    UIButton *btn = [self.view viewWithTag:tag];
    if(tag != self.oldBtn.tag)
    {
        [self click:btn];
    }
}

使用方法

     MycardunuseVC *unuse =[[MycardunuseVC alloc]init];
    unuse.title=@"未使用";
     MycarduseVC *use=[[MycarduseVC alloc]init];
    use.title=@"已使用";
    MycardendVC *end=[[MycardendVC alloc]init];
    end.title=@"已完成";
    
    NSArray *subViewControllers = @[unuse,use,end];
    HanboNavBarController *tabBarVC = [[HanboNavBarController alloc]initWithSubViewControllers:subViewControllers];
    tabBarVC.view.frame = CGRectMake(0, 64, SCREEN_WIDTH, SCREEN_HEIGHT - 64);
    
    [self.view addSubview:tabBarVC.view];
    [self addChildViewController:tabBarVC];

效果图:

导航条目切换.gif