正文

iOS实现秒杀活动倒计时

︶ㄣ米米素材网 メ
米米素材网V管理员 / 阅读
0709

这篇文章主要为大家详细介绍了iOS实现秒杀活动倒计时，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

ios关于大型网站抢购、距活动结束，剩余时间倒计时的实现代码，代码比较简单，大家根据需求适当的添加修改删除代码

iOS实现秒杀活动倒计时

1.定义4个 label 来接收倒计时:

?
1
2
3
4
@property (weak, nonatomic) iboutlet uilabel *daylabel;
@property (weak, nonatomic) iboutlet uilabel *hourlabel;
@property (weak, nonatomic) iboutlet uilabel *minutelabel;
@property (weak, nonatomic) iboutlet uilabel *secondlabel;

2.在实现文件中实现方法:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
//时间戳转换为日期格式(毫秒的时间戳)
- (nsstring *)timewithtimeintervalstring:(nsstring *)timestring
{
  // 格式化时间
  nsdateformatter* formatter = [[nsdateformatter alloc] init];
  formatter.timezone = [nstimezone timezonewithname:@"shanghai"];
  [formatter setdatestyle:nsdateformattermediumstyle];
  [formatter settimestyle:nsdateformattershortstyle];
  [formatter setdateformat:@"yyyy-mm-dd hh:mm:ss"];
 
  // 毫秒值转化为秒
  nsdate* date = [nsdate datewithtimeintervalsince1970:[timestring doublevalue]/ 1000.0];
  nsstring* datestring = [formatter stringfromdate:date];
  nslog(@"时间 === %@",datestring);
  return datestring;
}
-(void)downsecondhandle:(nsstring *)atimestring{
 
  nsdateformatter *dateformatter=[[nsdateformatter alloc] init];
  [dateformatter setdateformat:@"yyyy-mm-dd hh:mm:ss"];
 
 
  nsdate *enddate = [dateformatter datefromstring:[self timewithtimeintervalstring:atimestring]]; //结束时间
  nsdate *enddate_tomorrow = [[nsdate alloc] initwithtimeintervalsincereferencedate:([enddate timeintervalsincereferencedate])];
  nsdate *startdate = [nsdate date];
    nsstring* datestring = [dateformatter stringfromdate:startdate];
  nslog(@"现在的时间 === %@",datestring);
  nstimeinterval timeinterval =[enddate_tomorrow timeintervalsincedate:startdate];
 
  if (_timer==nil) {
    __block int timeout = timeinterval; //倒计时时间
 
    if (timeout!=0) {
      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, ^{
        if(timeout<=0){ //倒计时结束，关闭
          dispatch_source_cancel(_timer);
          _timer = nil;
          dispatch_async(dispatch_get_main_queue(), ^{
            self.daylabel.text = @"";
            self.hourlabel.text = @"00";
            self.minutelabel.text = @"00";
            self.secondlabel.text = @"00";
          });
        }else{
          int days = (int)(timeout/(3600*24));
          if (days==0) {
            self.daylabel.text = @"";
          }
          int hours = (int)((timeout-days*24*3600)/3600);
          int minute = (int)(timeout-days*24*3600-hours*3600)/60;
          int second = timeout-days*24*3600-hours*3600-minute*60;
          dispatch_async(dispatch_get_main_queue(), ^{
            if (days==0) {
              self.daylabel.text = @"0天";
            }else{
              self.daylabel.text = [nsstring stringwithformat:@"%d天",days];
            }
            if (hours<10) {
              self.hourlabel.text = [nsstring stringwithformat:@"0%d",hours];
            }else{
              self.hourlabel.text = [nsstring stringwithformat:@"%d",hours];
            }
            if (minute<10) {
              self.minutelabel.text = [nsstring stringwithformat:@"0%d",minute];
            }else{
              self.minutelabel.text = [nsstring stringwithformat:@"%d",minute];
            }
            if (second<10) {
              self.secondlabel.text = [nsstring stringwithformat:@"0%d",second];
            }else{
              self.secondlabel.text = [nsstring stringwithformat:@"%d",second];
            }
 
          });
          timeout--;
        }
      });
      dispatch_resume(_timer);
    }
  }
 
 
}

3.在需要出使用:

?
1
[self downsecondhandle:@"1494622800000"];

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持米米素材网。

原文链接：https://blog.csdn.net/qq_19678579/article/details/71479968