这是一个关于特价秒杀的demo
#import "XXXViewController.h"
#import "XXXDetailViewController.h"
#import "SaleHeaderView.h"
#import "SaleScollModel.h"
@implementation XXXViewController
{
SaleHeaderView *_saleHeaderView;
NSTimer *_lastTimer;
}
-(void)viewDidLoad
{
[super viewDidLoad];
self.scrollArray = [NSMutableArray array];
self.itemsArray=[NSMutableArray array];
self.tableViewArray=[NSMutableArray array];
[MBProgressHUD showHUDAddedTo:self.view animated:YES];
self.tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:style];
self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
self.tableView.delegate=self;
self.tableView.dataSource=self;
self.tableView.header=[MJRefreshNormalHeader headerWithRefreshingTarget:self refreshingAction:@selector(loadSaleData)];
_saleHeaderView =[[SaleHeaderView alloc]initWithFrame:CGRectMake(0, 0, screenWidth, 225)];
_saleHeaderView.collection.collectionViewDelegate = self;
[self loadSaleData];
}
- (void)loadSaleData{
// API为你的接口地址
[[NSNetworking sharedManager]get:API parameters:nil success:^(id response) {
SaleScollModel *model = [[SaleScollModel alloc]initWithDictionary:response error:nil];
[self.scrollArray removeAllObjects];
[self.scrollArray addObjectsFromArray:model.items];
_saleHeaderView.collection.dataArray = self.scrollArray;
_saleHeaderView.collection.imagesCount = self.scrollArray.count;
if (self.scrollArray.count != 0) {
self.tableView.tableHeaderView = _saleHeaderView;
}else{
self.tableView.tableHeaderView = nil;
}
[self refreshLessTime];
[_lastTimer invalidate];
[self initOverTime];
} failure:^(NSString *error, int code) {
[MBProgressHUD hideAllHUDsForView:self.view animated:YES];
}];
}
- (void)refreshLessTime
{
for (int i = 0; i < self.scrollArray.count; i++) {
SaleModel *model=self.scrollArray[i];
NSDictionary *dic = @{@"beginDate":model.begin_date,@"endDate": model.end_date};
NSUInteger overSec = [self getOverTime:dic];
model.residue_time=[self lessSecondToDay :overSec--];
NSInteger leaveNum = [model.all_num integerValue]-[model.sale_num integerValue];
model.percent = [NSString stringWithFormat:@"%f",leaveNum/[model.all_num floatValue]];
}
[_saleHeaderView.collection reloadData];
}
-(void)initOverTime
{
[self startTimer];
}
//开启定时器方法:
- (void)startTimer
{
_lastTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(refreshLessTime) userInfo:nil repeats:YES];
// 如果不添加下面这条语句,在UITableView拖动的时候,会阻塞定时器的调用
[[NSRunLoop currentRunLoop] addTimer:_lastTimer forMode:UITrackingRunLoopMode];
}
-(NSUInteger)getOverTime :(NSDictionary *)dataInfo
{
NSDate *systemDate= [NSDate date];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *beginDate = [formatter dateFromString:[dataInfo objectForKey:@"beginDate"]];
NSDate *endDate = [formatter dateFromString:[dataInfo objectForKey:@"endDate"]];
NSUInteger systemInt=[systemDate timeIntervalSince1970];
NSUInteger startInt=[beginDate timeIntervalSince1970];
NSUInteger endInt=[endDate timeIntervalSince1970];
NSInteger residue;
if (startInt>systemInt){
residue=startInt-systemInt; //开始时间大于现在的时间,团购未开始
}else
{
residue=endInt-systemInt;//团购开始,还能多少时间结束
}
return residue;
}
- (NSString *)lessSecondToDay:(NSUInteger)seconds
{
NSUInteger day = (NSUInteger)seconds/(24*3600);
NSUInteger hour = (NSUInteger)(seconds%(24*3600))/3600+day*24;
NSUInteger min = (NSUInteger)(seconds%(3600))/60;
NSUInteger second = (NSUInteger)(seconds%60);
NSString *time = [NSString stringWithFormat:@"%lu小时%lu分%lu秒",(unsigned long)hour,(unsigned long)min,(unsigned long)second];
return time;
}
#pragma mark - TTCollectionViewDelegate
// 点击轮播图进入详情页
- (void)cellClickWithIndex:(SaleModel *)model {
XXXDetailViewController *detail = [[XXXDetailViewController alloc] init];
detail.desId = model.desId;
detail.isSale = YES;
[self.mainVC.navigationController pushViewController:detail animated:YES];
}
#import "SaleHeaderView.h"
@implementation SaleHeaderView
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self addSubViews];
}
return self;
}
- (void)addSubViews{
// TTCollectionView为第三方轮播图
self.collection = [[TTCollectionView alloc]initWithFrame:self.frame];
[self addSubview:self.collection];
// 这里设置轮播图的自动播放时间间隔
self.collection.timeInterval = 3.0;
}
@end
@implementation TTCollectionView
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
SaleModel *model = self.dataArray[indexPath.row];
CollectionViewCell * cell = [CollectionViewCell dequeueReusableCellWithIdentifier:@"CellIdentifier"];
NSInteger leaveNum = [model.all_num integerValue]-[model.sale_num integerValue];
if (leaveNum<0) {
leaveNum=0;
}
cell.leaveNumLbl.text = [NSString stringWithFormat:@"%ld",leaveNum];
if (leaveNum > 0) {
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *beginDate = [formatter dateFromString:model.begin_date];
NSDate *endDate = [formatter dateFromString:model.end_date];
NSDate *systemDate = [NSDate date];
NSUInteger systemInt=[systemDate timeIntervalSince1970];
NSUInteger startInt=[beginDate timeIntervalSince1970];
NSUInteger endInt=[endDate timeIntervalSince1970];
if (startInt>systemInt) {
cell.beginOrEndLbl.text = @"距开始";
cell.timeLbl.hidden = NO;
}else
{
if (endInt < systemInt) {
cell.beginOrEndLbl.text = @"已结束";
cell.timeLbl.hidden = YES;
}else{
cell.beginOrEndLbl.text = @"距结束";
cell.timeLbl.hidden = NO;
}
}
}else{
cell.beginOrEndLbl.text = @"已抢完";
cell.timeLbl.hidden = YES;
}
cell.timeLbl.text=model.residue_time;
return cell;
}
@end
附:TTCollectionView下载地址:
https://github.com/DreamFlyingCow/TTAutoScrollView