iOS开发之--实现倒计时显示时分秒

#import <UIKit/UIKit.h>@interface TimerLab : UILabel@property (nonatomic,assign)NSInteger second;
@property (nonatomic,assign)NSInteger minute;
@property (nonatomic,assign)NSInteger hour;@end

#import "TimerLab.h"
@interface TimerLab ()
@property (nonatomic, strong)NSTimer *timer;
@end@implementation TimerLab- (id)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if (self) {
self.textAlignment = NSTextAlignmentCenter;
self.timer = [NSTimer scheduledTimerWithTimeInterval: target:self selector:@selector(timeHeadle) userInfo:nil repeats:YES];
}
return self;
}- (void)timeHeadle{ self.second--;
if (self.second==-) {
self.second=;
self.minute--;
if (self.minute==-) {
self.minute=;
self.hour--;
}
} if (self.hour < || self.minute < || self.second < ) {
self.text = @"倒计时结束需要显示的字样";
[self.timer invalidate];
self.timer = nil;
}else
{
self.text = [NSString stringWithFormat:@"%ld:%ld:%ld",(long)self.hour,(long)self.minute,(long)self.second]; }
if (self.second== && self.minute== && self.hour==) {
[self.timer invalidate];
self.timer = nil;
}
}@end

#pragma mark 每个cell倒计时的方法/*-------------------------------------------------------*/
- (NSString*)remainingTimeMethodAction:(long long)endTime
{
//得到当前时间
NSDate *nowData = [NSDate date];
NSLog(@"---当前时间：%@",nowData);
NSDate *endData=[NSDate dateWithTimeIntervalSince1970:endTime];
NSLog(@"----结束时间%@",endData);
NSCalendar* chineseClendar = [ [ NSCalendar alloc ] initWithCalendarIdentifier:NSGregorianCalendar ];
NSUInteger unitFlags =
NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit | NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit;
NSDateComponents *cps = [chineseClendar components:unitFlags fromDate:nowData toDate: endData options:];
NSInteger Hour = [cps hour];
NSInteger Min = [cps minute];
NSInteger Sec = [cps second];
NSInteger Day = [cps day];
NSInteger Mon = [cps month];
NSInteger Year = [cps year];
NSLog( @" From Now to %@, diff: Years: %ld Months: %ld, Days; %ld, Hours: %ld, Mins:%ld, sec:.%ld",
[nowData description], (long)Year, (long)Mon, (long)Day, (long)Hour, (long)Min,(long)Sec );
// NSString *countdown = [NSString stringWithFormat:@"还剩: %zi天 %zi小时 %zi分钟 %zi秒 ", Day,Hour, Min, Sec];
NSString *countdown = [NSString stringWithFormat:@"%zi:%zi:%zi",Hour, Min, Sec];
NSLog(@"0000%@",countdown);
if (Sec< && Min< && Hour<) {
countdown=[NSString stringWithFormat:@"进行中"];
}
return countdown;
}//时间转化时间戳
-(NSString *)checksting:(NSString *)datas
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterMediumStyle];
[formatter setTimeStyle:NSDateFormatterShortStyle];
[formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"]; NSDate *date = [formatter dateFromString:datas];
NSString *timerStrs = [NSString stringWithFormat:@"%ld", (long)[date timeIntervalSince1970]];
return timerStrs;
}#pragma mark/*------------------------------------------------------------------------- */

//1、 获得到期时间串
NSString *timSts = [NSString stringWithFormat:@"%@",model.time2]; //2、 转化成到时时间戳，并传进对比方法里面
NSString *timerStrs = [NSString stringWithFormat:@"%@",[self remainingTimeMethodAction:[[self checksting:timSts] longLongValue]]]; //3、 分割字符串，取出时分秒
NSArray *ary = [timerStrs componentsSeparatedByString:@":"];
NSLog(@"ary is %@",timerStrs); if (ary.count == ) {
cell.YB_dqTimeLab.hour = [[ary objectAtIndex:] integerValue];
cell.YB_dqTimeLab.minute = [[ary objectAtIndex:] integerValue];
cell.YB_dqTimeLab.second = [[ary objectAtIndex:] integerValue];
}else if(ary.count == )
{
cell.YB_dqTimeLab.hour = ;
cell.YB_dqTimeLab.minute = ;
cell.YB_dqTimeLab.second = ;
}