示例代码简单易懂：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
|
#import<uikit uikit.h="">@interfaceviewcontroller : uiviewcontroller@property(weak, nonatomic) iboutlet uilabel *daylabel;@property(weak, nonatomic) iboutlet uilabel *hourlabel;@property(weak, nonatomic) iboutlet uilabel *minutelabel;@property(weak, nonatomic) iboutlet uilabel *secondlabel;@end</uikit> |
|
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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
#import"viewcontroller.h"@interfaceviewcontroller (){ dispatch_source_t _timer;}@end@implementationviewcontroller/** * 获取当天的年月日的字符串 * 这里测试用 * @return 格式为年-月-日 */-(nsstring *)getyyyymmdd{ nsdate *now = [nsdate date]; nsdateformatter *formatday = [[nsdateformatter alloc] init]; formatday.dateformat = @"yyyy-mm-dd"; nsstring *daystr = [formatday stringfromdate:now]; returndaystr;}- (void)viewdidload { [superviewdidload]; nsdateformatter *dateformatter=[[nsdateformatter alloc] init]; [dateformatter setdateformat:@"yyyy-mm-dd"]; nsdate *enddate = [dateformatter datefromstring:[self getyyyymmdd]]; nsdate *enddate_tomorrow = [[nsdate alloc] initwithtimeintervalsincereferencedate:([enddate timeintervalsincereferencedate] +24*3600)]; nsdate *startdate = [nsdate date]; nstimeinterval timeinterval =[enddate_tomorrow timeintervalsincedate:startdate]; if(_timer==nil) { __blockinttimeout = 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{ intdays = (int)(timeout/(3600*24)); if(days==0) { self.daylabel.text = @""; } inthours = (int)((timeout-days*24*3600)/3600); intminute = (int)(timeout-days*24*3600-hours*3600)/60; intsecond = 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); } }}<span style="font-family: arial, verdana, sans-serif;">效果：</span> |
以上所述是小编给大家介绍的ios中实现简单易懂秒杀倒计时／倒计时代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：http://blog.csdn.net/lea__dongyang/article/details/55016344
