淘宝京东 单品界面翻页效果

//
//  ViewController.m
//  Test_ProductDetail
//
//  Created by Alice on 15/1/25.
//  Copyright (c) 2015年 Alice. All rights reserved.
//

#import "ViewController.h"
#define kScreenW      [[UIScreen mainScreen] bounds].size.width
#define kScreenH      [[UIScreen mainScreen] bounds].size.height

@interface ViewController ()<UITableViewDelegate,UITableViewDataSource,UIScrollViewDelegate>
{
    // base SV
    UIScrollView *_scrollView;
   
    // 1st page
    UITableView *_firstPage;
    UIButton *_buttonSwitch;
    
    // 2nd page
    UIView *_secondPage;
    UIScrollView *_detailScrollView; 
  }
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self addScrollView];
    [self addFirstPage];
    [self addSecondPage];
}

// 添加一级ScrollView
- (void)addScrollView
{
    UIScrollView *scrollView = [[UIScrollView alloc] init];
    scrollView.frame = CGRectMake(0, 0, kScreenW, kScreenH * 2);
    scrollView.backgroundColor = [UIColor redColor];
    [self.view addSubview:scrollView];
    scrollView.contentSize = CGSizeMake(kScreenW, kScreenH * 2);
    _scrollView = scrollView;
}

// 添加第一页
- (void)addFirstPage
{
    if (_firstPage == nil) {
    UITableView *tableView = [[UITableView alloc] initWithFrame:CGRectMake(10, 64, kScreenW - 20, kScreenH - 140) style:(UITableViewStylePlain)];
    tableView.delegate = self;
    tableView.dataSource = self;
   
    // 添加button,可以进行切换到下一页、加载数据等操作
    UIButton *button = [[UIButton alloc] init];
    button.frame = CGRectMake(20, CGRectGetMaxY(tableView.frame) + 20, kScreenW - 40, 30);
    [button setTitle:@"next page " forState:(UIControlStateNormal)];
    [button setTitleColor:[UIColor redColor] forState:(UIControlStateNormal)];
    button.backgroundColor = [UIColor whiteColor];
    [button addTarget:self action:@selector(switchToNextPage) forControlEvents:(UIControlEventTouchUpInside)];
    _buttonSwitch = button;
    _firstPage = tableView;
  }
    [_scrollView addSubview:_firstPage];
    [_scrollView addSubview:_buttonSwitch];
 
}

// 添加第二页
- (void)addSecondPage
{
    if (_secondPage == nil) {
        
        UIView *view = [[UIView alloc] init];
        view.frame = CGRectMake(0, kScreenH, kScreenW, kScreenH);
        UIScrollView *scrollView = [[UIScrollView alloc] init];
        scrollView.frame = CGRectMake(10, 20, kScreenW-20, kScreenH - 40);
        scrollView.contentSize = CGSizeMake(kScreenW - 20, kScreenH + 50);
        scrollView.delegate = self;
        view.backgroundColor = [UIColor whiteColor];
        scrollView.backgroundColor = [UIColor redColor];
       
        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 20,kScreenW - 40, 30)];
        label.backgroundColor = [UIColor whiteColor];
        label.textColor = [UIColor redColor];
        label.textAlignment = NSTextAlignmentCenter;
        label.text = @" scroll back to first page";
        [scrollView addSubview:label];
        [view addSubview:scrollView];
        _detailScrollView = scrollView;
        _secondPage = view;
    }
    [_scrollView addSubview:_secondPage];
    
}

#pragma mark - UITableView datasource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 2; // just for demo
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 5; // just for demo
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleDefault) reuseIdentifier:cellIdentifier];
        
    }
    cell.textLabel.text = @"Alice loves you!";
    return cell;
}

#pragma mark - UIScrollView delegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    if (scrollView == _firstPage) {
        NSLog(@"--- tableView contentOffset y %f --- ",scrollView.contentOffset.y);
       // 这里判断contentOffset , 数值根据需求 随意
        if (scrollView.contentOffset.y > 60 ) {
            [self switchToNextPage];
        }
        
    }
    
    if (scrollView == _scrollView) {
        NSLog(@"-- scrollView --- %f",scrollView.contentOffset.y);
    }
    
    if (scrollView == _detailScrollView ) {
        NSLog(@"-- detail scrollView %f--- ",scrollView.contentOffset.y);
        // 判断contentOffset 回到上一页 判断数值看需求,随意
        if (scrollView.contentOffset.y < - 60) {
            [self backToFirstPage];
        }
     
    }
}

- (void)switchToNextPage
{
    [_scrollView setContentOffset:CGPointMake(0, kScreenH) animated:YES];
}

- (void)backToFirstPage
{
    [_scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
}