时间:2021-01-03 15:35:10 | 栏目:iOS代码 | 点击:次
前段时间公司在研发一个电商项目,趁现在有时间把其中的知识点整理整理。
项目的商品详情页面当时是仿制淘宝的,用到的第三方库是MJRefresh,上拉操作和下拉操作的刷新效果是把MJRefresh刷新效果从新建个分类封装了一下,感谢杰哥!!!
基本思路:
1、设置一个 UIScrollView 作为视图底层,并且设置分页为两页
2、然后在第一个分页上添加一个 UITableView 并且设置表格能够上提加载(上拉操作即为让视图滚动到下一页)
3、 在第二个分页上添加一个 UIScrollView 并且设置能有下拉刷新操作(下拉操作即为让视图滚动到上一页)
4、第二个分页UIScrollView添加子UIView,一般式商品的图文详情、产品参数、店铺等
5、Demo只提供简单的思路,项目具体实现基本相同
/** 封装刷新 MJRefresh */ #import "QRG_MJRefreshAutoFooter.h" #import "QRG_MJRefreshNormalHeader.h" #import "CollectionViewCell.h" #define WIDTH [UIScreen mainScreen].bounds.size.width #define HEIGHT [UIScreen mainScreen].bounds.size.height #define ARCCOLOR (arc4random() % 255/256.0) #import "ViewController.h"
主要代码
- (void)viewDidLoad { [super viewDidLoad]; /** 底层view*/ UIScrollView *mainScrollView = [[UIScrollView alloc] init]; mainScrollView.scrollEnabled = NO; mainScrollView.frame = CGRectMake(0, 0, WIDTH, HEIGHT); mainScrollView.contentSize = CGSizeMake(WIDTH, HEIGHT * 2); mainScrollView.backgroundColor = [UIColor greenColor]; mainScrollView.pagingEnabled = YES; mainScrollView.bounces = YES; [self.view addSubview:mainScrollView]; /** 第一页面 table*/ OneTable = [[UITableView alloc] init]; OneTable.frame = CGRectMake(0,0, WIDTH, HEIGHT - 64); OneTable.separatorColor = [UIColor greenColor]; OneTable.delegate = self; OneTable.dataSource = self; OneTable.rowHeight = 80; [mainScrollView addSubview:OneTable]; /** 第二页面 scrollView*/ UIScrollView *TwoScrollView = [[UIScrollView alloc] init]; TwoScrollView.frame = CGRectMake(0, HEIGHT + 64, WIDTH, HEIGHT - 64); TwoScrollView.contentSize = CGSizeMake(WIDTH * 3, HEIGHT - 64); TwoScrollView.backgroundColor = [UIColor cyanColor]; TwoScrollView.pagingEnabled = YES; TwoScrollView.bounces = NO; [mainScrollView addSubview:TwoScrollView]; /** 第二页面 table*/ TwoTable = [[UITableView alloc] init]; TwoTable.frame = CGRectMake(WIDTH, 0, WIDTH, HEIGHT - 64); TwoTable.separatorColor = [UIColor redColor]; TwoTable.delegate = self; TwoTable.dataSource = self; [TwoScrollView addSubview:TwoTable]; /** 第二页面 UICollectionView*/ UICollectionViewFlowLayout *flow = [[UICollectionViewFlowLayout alloc] init]; [flow setScrollDirection:UICollectionViewScrollDirectionVertical]; UICollectionView *TwoCollectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT - 64) collectionViewLayout:flow]; TwoCollectionView.backgroundColor = [UIColor lightTextColor]; TwoCollectionView.delegate = self; TwoCollectionView.dataSource = self; [TwoScrollView addSubview:TwoCollectionView]; // [TwoCollectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"Coll"]; [TwoCollectionView registerNib:[UINib nibWithNibName:@"CollectionViewCell" bundle:nil] forCellWithReuseIdentifier:@"Coll"]; //设置UITableView 上拉加载 OneTable.mj_footer = [QRG_MJRefreshAutoFooter footerWithRefreshingBlock:^{ //上拉,执行对应的操作---改变底层滚动视图的滚动到对应位置 //设置动画效果 [UIView animateWithDuration:0.5 delay:0.0 options:UIViewAnimationOptionLayoutSubviews animations:^{ // self.scrollV.contentOffset = CGPointMake(0, IPHONE_H); [mainScrollView setContentOffset:CGPointMake(0, HEIGHT)]; } completion:^(BOOL finished) { //结束加载 [OneTable.mj_footer endRefreshing]; }]; }]; //设置TwoCollectionView 有下拉操作 TwoCollectionView.mj_header = [QRG_MJRefreshNormalHeader headerWithRefreshingBlock:^{ //下拉执行对应的操作 // self.scrollV.contentOffset = CGPointMake(0,0); [UIView animateWithDuration:1 animations:^{ [mainScrollView setContentOffset:CGPointMake(0, - 64)]; }]; //结束加载 [TwoCollectionView.mj_header endRefreshing]; }]; //设置TwoTable 有下拉操作 TwoTable.mj_header = [QRG_MJRefreshNormalHeader headerWithRefreshingBlock:^{ //下拉执行对应的操作 // self.scrollV.contentOffset = CGPointMake(0,0); [UIView animateWithDuration:1 animations:^{ [mainScrollView setContentOffset:CGPointMake(0, - 64)]; }]; //结束加载 [TwoTable.mj_header endRefreshing]; }]; }
pragma mark---------Delegate
#pragma mark---------tableDelegate - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { CGFloat height; if([tableView isEqual:OneTable]) { height = 80; }else { return 120; } return height; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return 10; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *Cell = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Cell]; if(!cell) { cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:Cell]; } cell.textLabel.text = [NSString stringWithFormat:@"%ld--askl",indexPath.row]; cell.imageView.image = [UIImage imageNamed:@"6"]; return cell; } #pragma mark---------CollectionViewDelegate - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section { return 20; } - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath { return CGSizeMake(150, 100); } - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { static NSString *Coll = @"Coll"; CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:Coll forIndexPath:indexPath]; // cell.backgroundColor =[UIColor greenColor]; return cell; }