aischool 倒计时VIEW封装

@implementation TWPaperTimeCountLabel

{

NSInteger miaoshu;

dispatch_source_t _timer;

}

-(id)initWithframe:(CGRect)frame endTime:(NSDate *)endtime delegate:(id<TWPaperTimelabelDelegate>)delegate

{

self = [super initWithFrame:frame];

if (self) {

self.delegate = delegate;

[self setcontentWith:endtime];

}

return self;

}

-(id)initWithframe:(CGRect)frame endTimeStr:(NSString *)endtimestr delegate:(id<TWPaperTimelabelDelegate>)delegate

{

self = [super initWithFrame:frame];

if (self) {

self.delegate = delegate;

if (endtimestr!=nil && [endtimestr isKindOfClass:[NSString class]]) {

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

NSDate *destDate= [dateFormatter dateFromString:endtimestr];

[self setcontentWith:destDate];

}

}

return self;

}

-(void)reloadTime:(NSString *)endtimestr

{

if (endtimestr!=nil && [endtimestr isKindOfClass:[NSString class]]) {

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

NSDate *destDate= [dateFormatter dateFromString:endtimestr];

[self setcontentWith:destDate];

}

}

-(void)setcontentWith:(NSDate *)data

{

NSDate *now = [NSDate new];

NSCalendar *cal = [NSCalendar currentCalendar];

unsigned int unitFlags =   NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;

NSDateComponents *d = [cal components:unitFlags fromDate:now toDate:data options:0];

NSInteger alltime = [d day]*3600*24+[d hour]*3600+[d minute]*60+[d second];

if(alltime>0)

{

[self GCDtimeresume:alltime];

}else

{

if (self.delegate!=nil && [self.delegate respondsToSelector:@selector(paperCountdownIsOver:)]) {

[self.delegate paperCountdownIsOver:self];

}

}

}

-(void)GCDtimeresume:(NSInteger)alltimeSecond

{

__block NSInteger timeout=alltimeSecond; //倒计时时间

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

WEAKSELF;

dispatch_source_set_event_handler(_timer, ^{

if(weakSelf == nil)

{

dispatch_source_cancel(_timer);

}

if(timeout<=0){ //倒计时结束，关闭

dispatch_source_cancel(_timer);

dispatch_async(dispatch_get_main_queue(), ^{

if (weakSelf.delegate!=nil && [weakSelf.delegate respondsToSelector:@selector(paperCountdownIsOver:)]) {

[weakSelf.delegate paperCountdownIsOver:weakSelf];

}

});

}else{

[weakSelf setlabel:timeout];

timeout--;

}

});

dispatch_resume(_timer);

}

-(void)stopcount

{

if(_timer)

{

dispatch_source_cancel(_timer);

}

}

-(void)setlabel:(NSInteger)alltimeSecond

{

NSString *content =@"倒计时: ";

NSInteger seconds = alltimeSecond % 60;

NSInteger minutes = (alltimeSecond / 60) % 60;

NSInteger hours = alltimeSecond / 3600;

if (hours>0) {

content =[content stringByAppendingString:[NSString stringWithFormat:@"%ld小时",(long)hours]];

}

if (minutes>0) {

content =[content stringByAppendingString:[NSString stringWithFormat:@"%ld分",(long)minutes]];

}

if (seconds>0) {

content =[content stringByAppendingString:[NSString stringWithFormat:@"%ld秒",(long)seconds]];

}

dispatch_async(dispatch_get_main_queue(), ^{

self.text = content;

});

}