iOS仿热门话题热点轮播界面tableView

废话不多说直接上代码：

这个功能应该是挺常见的, 一个tableView到另一个tableView, 类似segment的一个东西, 我把它封装起来了:

//
// ViewController.m
//
//
// Created by 高雅馨 on 16/6/3.
// Copyright © 2016年 高雅馨. All rights reserved.
//

#import "DCNavTabBarController.h"
#import "HTMacro.h"

@interface DCNavTabBarController ()<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 DCNavTabBarController
-(UIColor *)sliderColor
{
 if(_sliderColor == nil)
 {
  _sliderColor = [UIColor colorWithRed:1.00 green:0.36 blue:0.25 alpha:1.00];
 }
 return _sliderColor;
}
-(UIColor *)btnTextNomalColor
{
 if(_btnTextNomalColor == nil)
 {
  _btnTextNomalColor = [UIColor colorWithWhite:0.205 alpha:1.000];
 }
 return _btnTextNomalColor;
}
-(UIColor *)btnTextSeletedColor
{
 if(_btnTextSeletedColor == nil)
 {
  _btnTextSeletedColor = [UIColor colorWithRed:1.00 green:0.36 blue:0.25 alpha:1.00];
 }
 return _btnTextSeletedColor;
}
-(UIColor *)topBarColor
{
 if(_topBarColor == nil)
 {
  _topBarColor = [UIColor whiteColor];
 }
 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(25,41,self.btnW - 50, 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, SCREEN_WIDTH, 44)];
 scrollView.backgroundColor = self.topBarColor;
 self.topBar = scrollView;
 self.topBar.bounces = NO;
 [self.view addSubview:self.topBar];
 if(count <= 5) {
   self.btnW = SCREEN_WIDTH / count;
 } else {
   self.btnW = SCREEN_WIDTH / 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, 0, self.btnW, 44)];
  btn.titleLabel.font = [UIFont systemFontOfSize:15];
  btn.titleLabel.numberOfLines = 0;
  btn.titleLabel.textAlignment = 1;
  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];
  [self.topBar addSubview:btn];
  if(i == 0)
  {
   btn.selected = YES;
   self.oldBtn = btn;
  }
}
 self.topBar.contentSize = CGSizeMake(self.btnW *count, -64);
}
-(void)addVCView
{
 UIScrollView *contentView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0+44, SCREEN_WIDTH, SCREEN_HEIGHT -44)];
 self.contentView = contentView;
 self.contentView.bounces = NO;
 contentView.delegate = self;
 contentView.backgroundColor = [UIColor colorWithWhite:0.859 alpha:1.000];
 [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*SCREEN_WIDTH, 0, SCREEN_WIDTH, SCREEN_HEIGHT -44);
  [contentView addSubview:vc.view];
 }
 contentView.contentSize = CGSizeMake(count*SCREEN_WIDTH, SCREEN_HEIGHT - 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) *SCREEN_WIDTH, 0);
  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 >=SCREEN_WIDTH && sender.tag != self.VCArr.count + 10000 - 1)
 {
  [UIView animateWithDuration:0.3 animations:^{
   self.topBar.contentOffset = CGPointMake(maxX - SCREEN_WIDTH + self.btnW, -64);
  }];
 }else if(maxX < SCREEN_WIDTH)
 {
  [UIView animateWithDuration:0.3 animations:^{
   self.topBar.contentOffset = CGPointMake(0, 0);
  }];
 }
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
 //滑动导航条
 self.slider.frame = CGRectMake(scrollView.contentOffset.x / SCREEN_WIDTH *self.btnW + 25 , 41, self.btnW - 50, 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 /SCREEN_WIDTH + 0.5) + 10000;
 UIButton *btn = [self.view viewWithTag:tag];
 if(tag != self.oldBtn.tag)
 {
  [self click:btn];
 }
}
- (void)didReceiveMemoryWarning {
 [super didReceiveMemoryWarning];
}
@end

								 
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