cell上倒计时

作者: 司徒新新 | 来源:发表于2019-01-02 12:02 被阅读10次

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因为商城项目内有秒杀和限时购的需求,需要每个cell上都有一个倒计时,所以写了一个用一个计时器控制所有cell的倒计时时间控件;

//// XinxinTimer.m

// Created by 新新 on 2017/12/6.

// Copyright © 2017年 com.hong5.ios. All rights reserved.

//#import "XinxinTimer.h"

@implementation XinxinTimer{

    dispatch_source_t _timer;

    UITableView * _tableView;

}

- (instancetype)initWithTableView:(UITableView*)tableView dataArray:(NSArray*)dataArray { self = [super init]; if (self) {

_tableView = tableView;

_dataArray = [NSMutableArray arrayWithArray:dataArray];

[self destoryTimer];

[self countDownWithTabelView:_tableView dataArray:_dataArray];

}

return self;

}

#pragma mark - 传入数据开始倒计时

- (void)countDownWithTabelView:(UITableView*)tableView dataArray:(NSArray*)dataArray {

_tableView = tableView;

_dataArray= [NSMutableArray arrayWithArray:dataArray];

if (_timer==nil) {

dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);

_timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0,queue); dispatch_source_set_timer(_timer,dispatch_walltime(NULL, 0),1.0*NSEC_PER_SEC, 0); //每秒执行 dispatch_source_set_event_handler(_timer, ^{

dispatch_async(dispatch_get_main_queue(), ^{

if (dataArray.count > 0) {

NSArray *cells = tableView.visibleCells; //取出屏幕可见ceLl

for (UITableViewCell * cell in cells) {

      NSString* tempEndTime;

      if ([dataArray[0] isKindOfClass:[NSArray class]]) {

NSInteger section = cell.tag / 1000;

NSInteger row = cell.tag % 1000;

tempEndTime = dataArray[section][row];

}else {

tempEndTime = dataArray[cell.tag];

}

for (UIView * labText in cell.contentView.subviews) {

if (labText.tag == 13141516) {

UILabel * textLabel = (UILabel *)labText;

                  NSInteger endTime = tempEndTime.longLongValue; //+ _less;

      textLabel.text = [XinxinTimer getNowTimeWithString:endTime];

} } } }      }); });

dispatch_resume(_timer); // 启动定时器 }

}

#pragma mark - 滑动过快的时候不会闪

- (NSString *)countDownWithIndexPath:(NSIndexPath *)indexPath{

NSString* tempEndTime;

if ([_dataArray[0] isKindOfClass:[NSArray class]]) {

tempEndTime = _dataArray[indexPath.section][indexPath.row];

}else { tempEndTime = _dataArray[indexPath.row]; }

NSInteger endTime = tempEndTime.longLongValue;

   return [XinxinTimer getNowTimeWithString:endTime];   }

#pragma mark - 传入结束时间 | 计算与当前时间的差值

+ (NSString *)getNowTimeWithString:(NSInteger )aTimeString{

NSDate * sjDate = [NSDate date]; //手机时间

NSInteger sjInteger = [sjDate timeIntervalSince1970]; // 手机当前时间戳

NSTimeInterval timeInterval = aTimeString - sjInteger;

int days = (int)(timeInterval/(3600*24));

int hours = (int)((timeInterval-days*24*3600)/3600);

int minutes = (int)(timeInterval-days*24*3600-hours*3600)/60;

int seconds = timeInterval-days*24*3600-hours*3600-minutes*60;

NSString *dayStr;NSString *hoursStr;NSString *minutesStr;NSString *secondsStr;

dayStr = [NSString stringWithFormat:@"%d",days]; //天 hoursStr = [NSString stringWithFormat:@"%d",hours]; //小时

if(minutes<10) //分钟

minutesStr = [NSString stringWithFormat:@"0%d",minutes];

else

minutesStr = [NSString stringWithFormat:@"%d",minutes];

if(seconds < 10) //秒

secondsStr = [NSString stringWithFormat:@"0%d", seconds];

else secondsStr = [NSString stringWithFormat:@"%d",seconds];

if (hours<=0&&minutes<=0&&seconds<=0) { return @"支付时间已过！"; }

return [NSString stringWithFormat:@"剩余兑换时间: %@:%@:%@", hoursStr,minutesStr,secondsStr];   }

/** * 主动销毁定时器 */

-(void)destoryTimer{

if (_timer) { dispatch_source_cancel(_timer); _timer = nil; }}

-(void)dealloc{ NSLog(@"%s dealloc",object_getClassName(self));}@end