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
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