大致花了一個月時間，利用各種空閑時間，將這個客戶端實現了，在這里主要是想記錄下，設計的大體思路以及實現過程中遇到的坑......
這個項目的github地址：https://github.com/wzpziyi1/GroupPurchase
主要實現的功能，用UICollectionViewController展示團購數據，根據拼音進行檢索並展示數據，離線緩存團購數據，瀏覽記錄與收藏記錄的批量刪除，友盟分享的集成，利用UIView+AutoLayout寫布局，實現地圖定位、自定義大頭針等
整個項目，按功能分，有六個大的模塊，每個模塊里面都有各自的MVC，在各個MVC里面，再按照功能的不同，新建一下文件夾，存放實現統一功能的文件。
除此之外，還有一個Main模塊，里面的Lib意為Library，放一些實現此客戶端所需要用到的第三方庫。Category文件夾里面，放整個項目各個地方都有可能需要用到的分類；Controller里面，放上一些最主要功能的ViewController，比如，自定義的NavigationController和TabBarController，那么整個項目的Navigation或者TabBarController都是可以根據需要繼承自自定義的NavigationController，這里，我放的是：
后續，Home（首頁）界面的viewController和Search（搜索）界面的viewController都是繼承自ZYDealViewController的，Collect（收藏的團購記錄）和Browse（瀏覽的團購記錄）界面的viewController都是繼承自ZYOldDealViewController，整個項目多個地方用到，所以我放在了這里。
Other文件夾里面，我放的是一些雜七雜八的文件，比如說appDelegate等。Tool文件夾里面，我放的是一些工具類文件.
其中，Tool和Category里面的文件不要和他類耦合，因為這些東西，我們寫好一次之后，基本上是可以拖到下個項目直接使用的。
Home界面
如圖：
在聯網情況下，默認進來就是廣州的所有團購信息，支持上拉、下拉刷新，已經適配好橫豎屏。除此之外，還設置了當前地區、分類條件下，所有的團購信息都已經加載完畢了，那么將不可以進行上拉刷新操作（因為所有團購信息加載完畢，已經沒有數據可以加載，那么應該要隱藏footer），默認是一次刷新10條團購信息。
除此之外，如果在當前條件下，如果沒有團購信息，那么我顯示的是一張提示圖片：
下面這兩個彈框是一樣的，當初第一次寫的時候，是分別寫了兩個popViewController，后面在進行優化的時候，發現是可以寫成一個通用的雙表，這樣就進行了一系列的優化，使得以后遇到類似的雙表界面，直接將我寫好的類拖過去，就可以繼續使用了，圖片如下：
這是ZYHomeDropdown類，代碼如下：
#import <UIKit/UIKit.h>
@class ZYHomeDropdown;
@protocol ZYHomeDropdownDataSource <NSObject>
/**
* 左邊表格一共有多少行
*/
- (NSUInteger)numberOfRowsInMainTable:(ZYHomeDropdown *)homeDropdown;
/**
* 左邊表格每一行的標題
*
*/
- (NSString *)homeDropdown:(ZYHomeDropdown *)homeDropdown titleForRowInMainTable:(NSUInteger)row;
/**
* 左邊表格每一行的子數據
*
*/
- (NSArray *)homeDropdown:(ZYHomeDropdown *)homeDropdown subDataForRowInMainTable:(NSUInteger)row;
@optional
/**
* 左邊表格每一行的圖標
*
*/
- (NSString *)homeDropdown:(ZYHomeDropdown *)homeDropdown normalIconForRowInMainTable:(NSUInteger)row;
/**
* 左邊表格每一行的選中圖標
*
*/
- (NSString *)homeDropdown:(ZYHomeDropdown *)homeDropdown selectedIconForRowInMainTable:(NSUInteger)row;
@end
@protocol ZYHomeDropdownDelegate <NSObject>
- (void)homeDropdown:(ZYHomeDropdown *)homeDropdown didSelectedRowInMainTable:(int)row;
- (void)homeDropdown:(ZYHomeDropdown *)homeDropdown didSelectedRowInSubTable:(int)subRow mainRow:(int)mainRow;
@end
@interface ZYHomeDropdown : UIView
@property (nonatomic, weak) id<ZYHomeDropdownDataSource>dataSource;
@property (nonatomic, weak) id<ZYHomeDropdownDelegate>delegate;
+ (instancetype)homeDropdown;
@end
#import "ZYHomeDropdown.h"
#import "ZYHomeMainCell.h"
#import "ZYHomeSubCell.h"
@interface ZYHomeDropdown () <UITableViewDelegate, UITableViewDataSource>
@property (weak, nonatomic) IBOutlet UITableView *mainTableView;
@property (weak, nonatomic) IBOutlet UITableView *subTableview;
//主表中被選的cell的row
@property (nonatomic, assign) int selectedMainRow;
@end
@implementation ZYHomeDropdown
+ (instancetype)homeDropdown
{
return [[self alloc] init];
}
- (instancetype)init
{
if (self = [super init]) {
self = [[[NSBundle mainBundle] loadNibNamed:@"ZYHomeDropdown" owner:nil options:nil] lastObject];
[self commitInit];
}
return self;
}
- (void)commitInit
{
self.mainTableView.delegate = self;
self.mainTableView.dataSource = self;
self.subTableview.delegate = self;
self.subTableview.dataSource = self;
}
- (void)awakeFromNib
{
self.autoresizingMask = UIViewAutoresizingNone;
}
#pragma mark ----UITableViewDataSource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (self.mainTableView == tableView) {
return [self.dataSource numberOfRowsInMainTable:self];
}
else{
return [self.dataSource homeDropdown:self subDataForRowInMainTable:self.selectedMainRow].count;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView == self.mainTableView) {
ZYHomeMainCell *cell = [ZYHomeMainCell mainCellWithTableView:tableView];
cell.textLabel.text = [self.dataSource homeDropdown:self titleForRowInMainTable:indexPath.row];
if ([self.dataSource respondsToSelector:@selector(homeDropdown:normalIconForRowInMainTable:)]) {
cell.imageView.image = [UIImage imageNamed:[self.dataSource homeDropdown:self normalIconForRowInMainTable:indexPath.row]];
}
if ([self.dataSource respondsToSelector:@selector(homeDropdown:selectedIconForRowInMainTable:)]) {
cell.imageView.highlightedImage = [UIImage imageNamed:[self.dataSource homeDropdown:self selectedIconForRowInMainTable:indexPath.row]];
}
NSArray *subData = [self.dataSource homeDropdown:self subDataForRowInMainTable:indexPath.row];
if (subData.count) {
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
else{
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}
else{
ZYHomeSubCell *cell = [ZYHomeSubCell subCellWithTableView:tableView];
NSArray *subData = [self.dataSource homeDropdown:self subDataForRowInMainTable:self.selectedMainRow];
cell.textLabel.text = subData[indexPath.row];
return cell;
}
}
#pragma mark ----UITabelViewDelegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView == self.mainTableView) {
self.selectedMainRow = (int)indexPath.row;
[self.subTableview reloadData];
if ([self.delegate respondsToSelector:@selector(homeDropdown:didSelectedRowInMainTable:)]) {
[self.delegate homeDropdown:self didSelectedRowInMainTable:(int)indexPath.row];
}
}
else{
if ([self.delegate respondsToSelector:@selector(homeDropdown:didSelectedRowInSubTable:mainRow:)]) {
[self.delegate homeDropdown:self didSelectedRowInSubTable:(int)indexPath.row mainRow:self.selectedMainRow];
}
}
}
@end
上面代碼是大概實現思路，在具體實現里面，還有一個xib文件，以及mainCell和subCell。
下面是搜索的圖片，實際上，搜索實現很簡單，按照拼音或者關鍵字來檢索下，如果符合條件，就放到數組里面，最后刷新tableView即可：
另外，跨控制進行數據交換，最好是使用Notification
首頁還存在這樣一個界面：
也就是菜單界面，動態展示了一些模塊，五角星代表這需要展示收藏模塊，圓代表着展示瀏覽記錄模塊，另外兩個並未實現具體功能。
實現這樣一個動態的菜單，我使用的是AwesomeMenu這個第三方庫，具體實現可以見它github上的示例，項目中實現菜單的具體代碼：
- (void)setupAwesomeMenu
{
//initWithImage放背景圖片，normal和highlighted狀態下的背景圖片
//contentImage放具體要顯示的圖片
AwesomeMenuItem *midItem = [[AwesomeMenuItem alloc] initWithImage:[UIImage imageNamed:@"icon_pathMenu_background_highlighted"] highlightedImage:nil ContentImage:[UIImage imageNamed:@"icon_pathMenu_mainMine_normal"] highlightedContentImage:nil];
AwesomeMenuItem *firstItem = [[AwesomeMenuItem alloc] initWithImage:[UIImage imageNamed:@"bg_pathMenu_black_normal"] highlightedImage:nil ContentImage:[UIImage imageNamed:@"icon_pathMenu_collect_normal"] highlightedContentImage:[UIImage imageNamed:@"icon_pathMenu_collect_highlighted"]];
AwesomeMenuItem *secoendItem = [[AwesomeMenuItem alloc] initWithImage:[UIImage imageNamed:@"bg_pathMenu_black_normal"] highlightedImage:nil ContentImage:[UIImage imageNamed:@"icon_pathMenu_scan_normal"] highlightedContentImage:[UIImage imageNamed:@"icon_pathMenu_scan_highlighted"]];
AwesomeMenuItem *thirdItem = [[AwesomeMenuItem alloc] initWithImage:[UIImage imageNamed:@"bg_pathMenu_black_normal"] highlightedImage:nil ContentImage:[UIImage imageNamed:@"icon_pathMenu_more_normal"] highlightedContentImage:[UIImage imageNamed:@"icon_pathMenu_more_highlighted"]];
AwesomeMenuItem *fourthItem = [[AwesomeMenuItem alloc] initWithImage:[UIImage imageNamed:@"bg_pathMenu_black_normal"] highlightedImage:nil ContentImage:[UIImage imageNamed:@"icon_pathMenu_collect_normal"] highlightedContentImage:[UIImage imageNamed:@"icon_pathMenu_collect_highlighted"]];
NSArray *items = @[firstItem, secoendItem, thirdItem, fourthItem];
AwesomeMenu *awesome = [[AwesomeMenu alloc] initWithFrame:CGRectZero startItem:midItem optionMenus:items];
//開始點
awesome.startPoint = CGPointMake(50, 150);
//設置顯示區域（也就是角度）
awesome.menuWholeAngle = M_PI_2;
awesome.delegate = self;
//讓中間按鈕不旋轉
awesome.rotateAddButton = NO;
awesome.alpha = 0.5;
[self.view addSubview:awesome];
[awesome autoPinEdgeToSuperviewEdge:ALEdgeLeft withInset:0];
[awesome autoPinEdgeToSuperviewEdge:ALEdgeBottom withInset:0];
[awesome autoSetDimensionsToSize:CGSizeMake(200, 200)];
}
前面提到，Home模塊的vc和Search模塊的vc(viewController)是繼承自ZYDealViewController，在ZYDealViewController我處理了home模塊和search模塊的相同功能，它們各自的特殊功能是放到各自的vc里面實現的，ZYDealViewController的代碼如下：
#import <UIKit/UIKit.h>
@interface ZYDealViewController : UICollectionViewController
/** 設置請求參數:交給子類去實現 */
- (void)setParams:(NSMutableDictionary *)params;
@end
#import "ZYDealViewController.h"
#import "ZYConst.h"
#import "UIBarButtonItem+ZYExtension.h"
#import "UIView+Extension.h"
#import "ZYHomeTopItem.h"
#import "ZYCategoryViewController.h"
#import "ZYDistrictViewController.h"
#import "ZYSort.h"
#import "ZYCity.h"
#import "ZYMetaTool.h"
#import "ZYSortViewController.h"
#import "ZYRegion.h"
#import "ZYCategory.h"
#import "DPAPI.h"
#import "ZYDeal.h"
#import "MJExtension.h"
#import "ZYDealCell.h"
#import "MJRefresh.h"
#import "MBProgressHUD+MJ.h"
#import "UIView+AutoLayout.h"
#import "ZYDetailViewController.h"
@interface ZYDealViewController () <DPRequestDelegate>
@property (nonatomic, strong) NSMutableArray *deals;
@property (nonatomic, strong) DPRequest *lastRequest;
@property (nonatomic, assign) int currentPage;
@property (nonatomic, assign) int totalCount;
/** 當沒有團購數據時，顯示一張沒有數據的背景 */
@property (nonatomic, strong) UIImageView *backgroundImageView;
@end
@implementation ZYDealViewController
static NSString * const reuseIdentifier = @"ZYDealViewControllerCell";
- (UIImageView *)backgroundImageView
{
if (!_backgroundImageView) {
_backgroundImageView = [[UIImageView alloc] init];
_backgroundImageView.image = [UIImage imageNamed:@"icon_deals_empty"];
[self.view addSubview:_backgroundImageView];
[_backgroundImageView autoCenterInSuperview];
}
return _backgroundImageView;
}
- (NSMutableArray *)deals
{
if (!_deals) {
_deals = [NSMutableArray array];
}
return _deals;
}
- (instancetype)init
{
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
//設置cell的大小
layout.itemSize = CGSizeMake(305, 305);
return [self initWithCollectionViewLayout:layout];
}
/**
當屏幕旋轉,控制器view的尺寸發生改變調用
*/
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
// 根據屏幕寬度決定列數
int cols = (size.width == 1024) ? 3 : 2;
// 根據列數計算內邊距
UICollectionViewFlowLayout *layout = (UICollectionViewFlowLayout *)self.collectionViewLayout;
CGFloat inset = (size.width - cols * layout.itemSize.width) / (cols + 1);
layout.sectionInset = UIEdgeInsetsMake(inset, inset, inset, inset);
// 設置每一行之間的間距
layout.minimumLineSpacing = inset;
}
- (void)viewDidLoad {
[super viewDidLoad];
[self setupCollection];
}
#pragma mark ----setup系列
- (void)setupCollection
{
[self.collectionView registerNib:[UINib nibWithNibName:@"ZYDealCell" bundle:nil] forCellWithReuseIdentifier:reuseIdentifier];
self.collectionView.backgroundColor = ZYGlobalBg;
self.collectionView.alwaysBounceVertical = YES;
self.collectionView.header = [MJRefreshNormalHeader headerWithRefreshingTarget:self refreshingAction:@selector(heaerRefresh)];
self.collectionView.footer = [MJRefreshAutoNormalFooter footerWithRefreshingTarget:self refreshingAction:@selector(footerRefresh)];
}
#pragma mark ----與服務器進行交互
- (void)loadNewDeals
{
DPAPI *api = [[DPAPI alloc] init];
NSMutableDictionary *params = [NSMutableDictionary dictionary];
//讓子類自行設置響應的參數
[self setParams:params];
params[@"page"] = @(self.currentPage);
// 每頁的條數
params[@"limit"] = @10;
self.lastRequest = [api requestWithURL:@"v1/deal/find_deals" params:params delegate:self];
// NSLog(@"請求參數:%@", params);
}
- (void)loadDeals
{
self.currentPage = 1;
[self loadNewDeals];
}
- (void)loadMoreDeals
{
self.currentPage++;
[self loadNewDeals];
}
- (void)request:(DPRequest *)request didFinishLoadingWithResult:(id)result
{
if (request != self.lastRequest) { //如果不是同一個請求，是短時間內發了兩次請求，那么只要最近的一次請求
return;
}
self.totalCount = [result[@"total_count"] intValue];
NSArray *newDeals = [ZYDeal objectArrayWithKeyValuesArray:result[@"deals"]];
if (self.currentPage == 1) {
[self.deals removeAllObjects];
}
[self.deals addObjectsFromArray:newDeals];
[self.collectionView reloadData];
[self.collectionView.footer endRefreshing];
[self.collectionView.header endRefreshing];
}
- (void)request:(DPRequest *)request didFailWithError:(NSError *)error
{
if (self.lastRequest != request) {
return;
}
//在ipad開發中，如果要顯示HUD，特別需要注意，顯示到self.view上
// [MBProgressHUD showError:@"加載失敗，請檢查您的網絡..."];
[MBProgressHUD showError:@"加載失敗，請檢查您的網絡..." toView:self.view];
[self.collectionView.footer endRefreshing];
//當不是請求第一頁的時候，如果請求失敗，那么應當減去這次請求的
self.currentPage--;
[self.collectionView.footer endRefreshing];
[self.collectionView.header endRefreshing];
}
#pragma mark ----刷新方法
- (void)heaerRefresh
{
[self loadDeals];
}
- (void)footerRefresh
{
[self loadMoreDeals];
}
#pragma mark <UICollectionViewDataSource>
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
//需要在請求發送就設置以此cell的布局
[self viewWillTransitionToSize:CGSizeMake(self.collectionView.width, self.collectionView.height) withTransitionCoordinator:nil];
self.backgroundImageView.hidden = (self.deals.count != 0);
return self.deals.count;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
ZYDealCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
cell.deal = self.deals[indexPath.row];
//第一次進入界面，self.totalCount會被初始化為0
self.collectionView.footer.hidden = (self.totalCount == self.deals.count);
return cell;
}
#pragma mark <UICollectionViewDelegate>
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
ZYDetailViewController *detailVc = [[ZYDetailViewController alloc] initWithNibName:@"ZYDetailViewController" bundle:nil];
detailVc.deal = self.deals[indexPath.row];
[self presentViewController:detailVc animated:YES completion:nil];
}
@end
其次就是Collect模塊和Browse模塊，這兩個模塊很相似，都是需要實現離線緩存，都是需要支持批量刪除的，如此，就完全可以將對象相似的功能提取出來，放到基類里面，而這兩個類繼承自基類，從而可以大大減少代碼量，在代碼層次、結構上來看，也會好上很多。
我采用的是Sqlite數據庫來進行的離線緩存，是這樣設計的，有一個自增長的主鍵，一個團購(deal)model，團購的id，取出數據時，按照主鍵的倒序排序。
數據庫設計代碼如下：
#import <Foundation/Foundation.h>
@class ZYDeal;
@interface ZYDealTool : NSObject
+ (void)addCollectionDeal:(ZYDeal *)deal;
+ (void)removeCollectionDeal:(ZYDeal *)deal;
+ (NSArray *)collectDeals:(int)page;
+ (int)collectDealsCount;
+ (BOOL)isCollected:(ZYDeal *)deal;
+ (void)addBrowseDeal:(ZYDeal *)deal;
+ (void)removeBrowseDeal:(ZYDeal *)deal;
+ (NSArray *)browseDeals:(int)page;
+ (int)browseDealsCount;
+ (BOOL)isBrowsed:(ZYDeal *)deal;
@end
#import "ZYDealTool.h"
#import "FMDB.h"
#import "ZYDeal.h"
@implementation ZYDealTool
static FMDatabase *_database;
+ (void)initialize
{
NSString *doc = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *path = [doc stringByAppendingPathComponent:@"deal.sqlite"];
_database = [FMDatabase databaseWithPath:path];
if (![_database open]) return;
[_database executeUpdateWithFormat:@"CREATE TABLE IF NOT EXISTS t_collect_deal(id integer PRIMARY KEY, deal blob NOT NULL, deal_id text NOT NULL);"];
[_database executeUpdateWithFormat:@"CREATE TABLE IF NOT EXISTS t_browse_deal(id integer PRIMARY KEY, deal blob NOT NULL, deal_id text NOT NULL);"];
}
+ (void)addCollectionDeal:(ZYDeal *)deal
{
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:deal];
[_database executeUpdateWithFormat:@"INSERT INTO t_collect_deal(deal, deal_id) VALUES (%@, %@);",data, deal.deal_id];
}
+ (void)removeCollectionDeal:(ZYDeal *)deal
{
[_database executeUpdateWithFormat:@"DELETE FROM t_collect_deal WHERE deal_id = %@;", deal.deal_id];
}
+ (NSArray *)collectDeals:(int)page
{
int size = 10;
int pos = (page - 1) * size;
NSMutableArray *deals = [NSMutableArray array];
FMResultSet *resultSet = [_database executeQueryWithFormat:@"SELECT * FROM t_collect_deal ORDER BY id DESC LIMIT %d,%d;",pos,size];
while (resultSet.next) {
ZYDeal *deal = [NSKeyedUnarchiver unarchiveObjectWithData:[resultSet objectForColumnName:@"deal"]];
[deals addObject:deal];
}
return deals;
}
+ (int)collectDealsCount
{
FMResultSet *resultSet = [_database executeQueryWithFormat:@"SELECT count(*) AS deal_count FROM t_collect_deal;"];
[resultSet next];
return [resultSet intForColumn:@"deal_count"];
}
+ (BOOL)isCollected:(ZYDeal *)deal
{
FMResultSet *resultSet = [_database executeQueryWithFormat:@"SELECT count(*) AS deal_count FROM t_collect_deal WHERE deal_id = %@;", deal.deal_id];
[resultSet next];
#warning 索引從1開始
return [resultSet intForColumn:@"deal_count"] == 1;
}
+ (void)addBrowseDeal:(ZYDeal *)deal
{
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:deal];
[_database executeUpdateWithFormat:@"INSERT INTO t_browse_deal(deal, deal_id) VALUES (%@, %@);",data, deal.deal_id];
}
+ (void)removeBrowseDeal:(ZYDeal *)deal
{
[_database executeUpdateWithFormat:@"DELETE FROM t_browse_deal WHERE deal_id = %@;", deal.deal_id];
}
+ (NSArray *)browseDeals:(int)page
{
int size = 10;
int pos = (page - 1) * size;
NSMutableArray *deals = [NSMutableArray array];
FMResultSet *resultSet = [_database executeQueryWithFormat:@"SELECT * FROM t_browse_deal ORDER BY id DESC LIMIT %d,%d;",pos,size];
while (resultSet.next) {
ZYDeal *deal = [NSKeyedUnarchiver unarchiveObjectWithData:[resultSet objectForColumnName:@"deal"]];
[deals addObject:deal];
}
return deals;
}
+ (int)browseDealsCount
{
FMResultSet *resultSet = [_database executeQueryWithFormat:@"SELECT count(*) AS deal_count FROM t_browse_deal;"];
[resultSet next];
return [resultSet intForColumn:@"deal_count"];
}
+ (BOOL)isBrowsed:(ZYDeal *)deal
{
FMResultSet *resultSet = [_database executeQueryWithFormat:@"SELECT count(*) AS deal_count FROM t_browse_deal WHERE deal_id = %@;", deal.deal_id];
[resultSet next];
#warning 索引從1開始
return [resultSet intForColumn:@"deal_count"] == 1;
}
@end
刪除單個、批量刪除功能:
這里需要注意的一點就是cell的循環利用功能，你不能只是修改界面展示，而是需要深入去修改導致界面更改的model，這樣才可以做到完美的循環利用，不然會導致bug，請注意，在mvc模式下，界面如何展示都是由model決定的，如果要更改，請更改model。還有就是，當點擊進去，會是一條團購詳情的界面，在這個界面，當我取消收藏之后，回到收藏界面，也是應當同步刪除掉取消了收藏的團購數據的，這里需要注意，用Notification發回來的deal和正在展示的那條deal並不會指向同一個內存地址，所以單純的判斷這兩條團購數據相等與否是不行的，應當是重寫deal的模型的isEqual方法。
下面是代碼：
ZYOldDealViewController
#import <UIKit/UIKit.h>
@class ZYDeal;
@interface ZYOldDealViewController : UICollectionViewController
/**
* 這個方法交給子類去實現，從而得到不同子類的具體背景圖片
*
*/
- (NSString *)bgImageName;
/**
* 這個方法交給子類去實現，從而得到不同子類數據庫里的具體數據
*
*/
- (NSArray *)arrayWithCurretnPage:(int)currentPage;
/**
* 這個方法教給子類去調用，移除deals內所有數據，重新從數據庫里加載
*/
- (void)removeDealsAllObjects;
/**
* 讓子類實現這個方法，返回數據庫中還有多少條團購數據
*
*/
- (int)countForDeals;
/**
* 讓子類實現這個方法，返回navigationBar的標題
*
*/
- (NSString *)titleForNavBar;
/**
* 讓子類實現這個方法，刪除掉自身數據庫內擁有的deal
*
*/
- (void)deletedSqliteDeal:(ZYDeal *)deal;
@end
#import "ZYOldDealViewController.h"
#import "ZYDeal.h"
#import "UIView+AutoLayout.h"
#import "ZYConst.h"
#import "MJRefresh.h"
#import "UIView+Extension.h"
#import "ZYDealCell.h"
#import "ZYDetailViewController.h"
#import "ZYDealTool.h"
#import "UIBarButtonItem+ZYExtension.h"
@interface ZYOldDealViewController ()
/** 當沒有團購數據時，顯示一張沒有數據的背景 */
@property (nonatomic, strong) UIImageView *backgroundImageView;
@property (nonatomic, strong) NSMutableArray *deals;
@property (nonatomic, assign) int currentPage;
@property (nonatomic, strong) UIBarButtonItem *backItem;
@property (nonatomic, strong) UIBarButtonItem *selectedAllItem;
@property (nonatomic, strong) UIBarButtonItem *unselectedAllItem;
@property (nonatomic, strong) UIBarButtonItem *delectedItem;
@end
@implementation ZYOldDealViewController
static NSString * const reuseIdentifier = @"ZYDealViewControllerCell";
- (UIImageView *)backgroundImageView
{
if (!_backgroundImageView) {
_backgroundImageView = [[UIImageView alloc] init];
NSString *imageName = [self bgImageName];
_backgroundImageView.image = [UIImage imageNamed:imageName];
[self.view addSubview:_backgroundImageView];
[_backgroundImageView autoCenterInSuperview];
}
return _backgroundImageView;
}
- (NSMutableArray *)deals
{
if (!_deals) {
_deals = [NSMutableArray array];
}
return _deals;
}
#pragma mark ----barButtonItem的懶加載
- (UIBarButtonItem *)backItem
{
if (!_backItem) {
_backItem = [UIBarButtonItem barButtonItemWithTarget:self action:@selector(clickbackItem) normalImage:@"icon_back" highImage:@"icon_back_highlighted"];
}
return _backItem;
}
- (UIBarButtonItem *)selectedAllItem
{
if (!_selectedAllItem) {
_selectedAllItem = [[UIBarButtonItem alloc] initWithTitle:@" 全選 " style:UIBarButtonItemStyleDone target:self action:@selector(clickSelectedAllItem)];
}
return _selectedAllItem;
}
- (UIBarButtonItem *)unselectedAllItem
{
if (!_unselectedAllItem) {
_unselectedAllItem = [[UIBarButtonItem alloc] initWithTitle:@" 全不選 " style:UIBarButtonItemStyleDone target:self action:@selector(clickUnselectedAllItem)];
}
return _unselectedAllItem;
}
- (UIBarButtonItem *)delectedItem
{
if (!_delectedItem) {
_delectedItem = [[UIBarButtonItem alloc] initWithTitle:@" 刪除 " style:UIBarButtonItemStyleDone target:self action:@selector(clickDelectedItem)];
}
return _delectedItem;
}
- (instancetype)init
{
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
//設置cell的大小
layout.itemSize = CGSizeMake(305, 305);
return [self initWithCollectionViewLayout:layout];
}
/**
當屏幕旋轉,控制器view的尺寸發生改變調用
*/
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
// 根據屏幕寬度決定列數
int cols = (size.width == 1024) ? 3 : 2;
// 根據列數計算內邊距
UICollectionViewFlowLayout *layout = (UICollectionViewFlowLayout *)self.collectionViewLayout;
CGFloat inset = (size.width - cols * layout.itemSize.width) / (cols + 1);
layout.sectionInset = UIEdgeInsetsMake(inset, inset, inset, inset);
// 設置每一行之間的間距
layout.minimumLineSpacing = inset;
}
- (void)viewDidLoad {
[super viewDidLoad];
[self setupNav];
[self setupNavItem];
[self setupCollection];
[self loadMoreDeals];
}
#pragma mark ----setup系列
- (void)setupNav
{
UINavigationBar *appearance = [UINavigationBar appearance];
// 設置文字屬性
NSMutableDictionary *textAttrs = [NSMutableDictionary dictionary];
textAttrs[UITextAttributeTextColor] = [UIColor blackColor];
textAttrs[UITextAttributeFont] = [UIFont boldSystemFontOfSize:20];//粗體，
// UIOffsetZero是結構體, 只要包裝成NSValue對象, 才能放進字典\數組中
textAttrs[UITextAttributeTextShadowOffset] = [NSValue valueWithUIOffset:UIOffsetZero];
[appearance setTitleTextAttributes:textAttrs];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"編輯" style:UIBarButtonItemStyleDone target:self action:@selector(clickEditBarButton:)];
self.navigationItem.leftBarButtonItems = @[self.backItem];
self.navigationItem.title = [self titleForNavBar];
}
- (void)setupNavItem
{
//通過設置這個屬性，可是設置整個導航欄的UIBarButtonItem的屬性
UIBarButtonItem *appearance = [UIBarButtonItem appearance];
//設置普通狀態下得文字屬性
NSMutableDictionary *textAttrs = [NSMutableDictionary dictionary];
//文字顏色
textAttrs[NSForegroundColorAttributeName] = ZYColor(47,188,173);
//文字字體
textAttrs[NSFontAttributeName] = [UIFont systemFontOfSize:18.0];
[appearance setTitleTextAttributes:textAttrs forState:UIControlStateNormal];
// 設置不可用狀態(disable)的文字屬性
NSMutableDictionary *disableTextAttrs = [NSMutableDictionary dictionary];
disableTextAttrs[NSForegroundColorAttributeName] = [UIColor lightGrayColor];
disableTextAttrs[NSFontAttributeName] = [UIFont systemFontOfSize:15];
[appearance setTitleTextAttributes:disableTextAttrs forState:UIControlStateDisabled];
}
- (void)setupCollection
{
[self.collectionView registerNib:[UINib nibWithNibName:@"ZYDealCell" bundle:nil] forCellWithReuseIdentifier:reuseIdentifier];
self.collectionView.backgroundColor = ZYGlobalBg;
self.collectionView.alwaysBounceVertical = YES;
self.collectionView.footer = [MJRefreshAutoNormalFooter footerWithRefreshingTarget:self refreshingAction:@selector(footerRefresh)];
}
#pragma mark ----與數據庫進行交互
- (void)loadMoreDeals
{
self.currentPage++;
NSArray *tempArray = [self arrayWithCurretnPage:self.currentPage];
[self.deals addObjectsFromArray:tempArray];
[self.collectionView reloadData];
[self.collectionView.footer endRefreshing];
}
#pragma mark ----刷新方法
- (void)footerRefresh
{
[self loadMoreDeals];
}
#pragma mark ----click事件
- (void)clickbackItem
{
[self.navigationController popViewControllerAnimated:YES];
}
- (void)clickEditBarButton:(UIBarButtonItem *)item
{
if ([item.title isEqualToString:@"完成"]) {
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"編輯" style:UIBarButtonItemStyleDone target:self action:@selector(clickEditBarButton:)];
self.navigationItem.leftBarButtonItems = @[self.backItem];
[self.deals enumerateObjectsUsingBlock:^(ZYDeal *obj, NSUInteger idx, BOOL *stop) {
obj.editing = NO;
obj.checking = NO;
}];
}
else{
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"完成" style:UIBarButtonItemStyleDone target:self action:@selector(clickEditBarButton:)];
self.navigationItem.leftBarButtonItems = self.navigationItem.leftBarButtonItems = @[self.backItem, self.selectedAllItem, self.unselectedAllItem, self.delectedItem];
[self.deals enumerateObjectsUsingBlock:^(ZYDeal *obj, NSUInteger idx, BOOL *stop) {
obj.editing = YES;
}];
}
[self.collectionView reloadData];
}
- (void)clickSelectedAllItem
{
[self.deals enumerateObjectsUsingBlock:^(ZYDeal *obj, NSUInteger idx, BOOL *stop) {
obj.checking = YES;
}];
[self.collectionView reloadData];
}
- (void)clickUnselectedAllItem
{
[self.deals enumerateObjectsUsingBlock:^(ZYDeal *obj, NSUInteger idx, BOOL *stop) {
obj.checking = NO;
}];
[self.collectionView reloadData];
}
- (void)clickDelectedItem
{
NSMutableArray *deletedArray = [NSMutableArray array];
//需要注意的是，在遍歷數組的時候，是不可以刪除數組內元素的
[self.deals enumerateObjectsUsingBlock:^(ZYDeal *obj, NSUInteger idx, BOOL *stop) {
if (obj.isChecking) {
[deletedArray addObject:obj];
}
}];
[deletedArray enumerateObjectsUsingBlock:^(ZYDeal *obj, NSUInteger idx, BOOL *stop) {
[self.deals removeObject:obj];
[self deletedSqliteDeal:obj];
}];
[self.collectionView reloadData];
}
#pragma mark ----其他
- (void)removeDealsAllObjects
{
[self.deals removeAllObjects];
self.currentPage = 0;
}
#pragma mark <UICollectionViewDataSource>
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
//需要在請求發送就設置以此cell的布局
[self viewWillTransitionToSize:CGSizeMake(self.collectionView.width, self.collectionView.height) withTransitionCoordinator:nil];
if (self.deals.count == 0 && [self.navigationItem.rightBarButtonItem.title isEqualToString:@"完成"]) {
[self clickEditBarButton:self.navigationItem.rightBarButtonItem];
}
self.backgroundImageView.hidden = (self.deals.count != 0);
self.navigationItem.rightBarButtonItem.enabled = (self.deals.count != 0);
return self.deals.count;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
ZYDealCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
cell.deal = self.deals[indexPath.row];
self.collectionView.footer.hidden = (self.deals.count == [self countForDeals]);
return cell;
}
#pragma mark <UICollectionViewDelegate>
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
ZYDetailViewController *detailVc = [[ZYDetailViewController alloc] initWithNibName:@"ZYDetailViewController" bundle:nil];
detailVc.deal = self.deals[indexPath.row];
[self presentViewController:detailVc animated:YES completion:nil];
}
@end
ZYCollectViewController是繼承自ZYOldDealViewController的，所以相應代碼比較少：
#import <UIKit/UIKit.h>
#import "ZYOldDealViewController.h"
@interface ZYCollectViewController : ZYOldDealViewController
@end
#import "ZYCollectViewController.h"
#import "ZYDeal.h"
#import "ZYConst.h"
#import "MJRefresh.h"
#import "UIView+Extension.h"
#import "ZYDealCell.h"
#import "ZYDetailViewController.h"
#import "ZYDealTool.h"
#import "UIBarButtonItem+ZYExtension.h"
@interface ZYCollectViewController ()
@end
@implementation ZYCollectViewController
- (NSString *)bgImageName
{
return @"icon_collects_empty";
}
- (void)viewDidLoad {
[super viewDidLoad];
[self setupNotification];
[self loadDeals];
}
#pragma mark ----setup系列
- (void)setupNotification
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(collectStateDidChange:) name:ZYCollectStateDidChangeNotification object:nil];
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
#pragma mark ----與數據庫進行交互
- (void)loadDeals
{
[self.collectionView.footer beginRefreshing];
}
- (void)deletedSqliteDeal:(ZYDeal *)deal
{
[ZYDealTool removeCollectionDeal:deal];
}
#pragma mark ----notification系列
- (void)collectStateDidChange:(NSNotification *)note
{
[self removeDealsAllObjects];
[self loadDeals];
}
#pragma mark ----其他
- (NSArray *)arrayWithCurretnPage:(int)currentPage
{
return [ZYDealTool collectDeals:currentPage];
}
- (int)countForDeals
{
return [ZYDealTool collectDealsCount];
}
- (NSString *)titleForNavBar
{
return @"收藏";
}
@end
同理，ZYBrowseViewController也是繼承自ZYOldDealViewController的
#import "ZYBrowseViewController.h"
#import "MJRefresh.h"
#import "ZYConst.h"
#import "ZYDealTool.h"
@interface ZYBrowseViewController ()
@end
@implementation ZYBrowseViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self loadDeals];
}
- (NSString *)bgImageName
{
return @"icon_latestBrowse_empty";
}
- (NSArray *)arrayWithCurretnPage:(int)currentPage
{
return [ZYDealTool browseDeals:currentPage];
}
- (int)countForDeals
{
return [ZYDealTool browseDealsCount];
}
- (NSString *)titleForNavBar
{
return @"瀏覽記錄";
}
#pragma mark ----與數據庫進行交互
- (void)loadDeals
{
[self.collectionView.footer beginRefreshing];
}
- (void)deletedSqliteDeal:(ZYDeal *)deal
{
[ZYDealTool removeBrowseDeal:deal];
}
@end
團購詳情界面，如圖：
這是未被收藏的團購：
這是被收藏之后的圖片：
當點擊分享，會跳出關於分享的界面，只是最簡單的分享......
下面，這是地圖界面的相關圖片：
MapKit框架中，反地理編碼、自定義大頭針等技術。
以上，就是這個項目的所有實現內容了，沒有做緩存限制，這一點也很簡單，直接使用SDWebImage框架提供的，在接受到內存警告時，清理緩存即可。
這個項目的github地址：https://github.com/wzpziyi1/GroupPurchase