在项目中,我们经常遇到有一个过期的时间,而这个过期的时间点后台又没有给,只给了个开始时间,因此我们需要自己去计算解决这个过期问题了.
//倒计时相关代码
NSInteger orderTime = [TimeHandelTool timeSwitchTimestamp:model.OrderTime andFormatter:@"YYYY-MM-dd hh:mm"];
NSLog(@"%ld",orderTime);
NSInteger nowTime = [TimeHandelTool getNowTimestamp];
NSLog(@"%ld",nowTime);
__block NSInteger timeCha = nowTime - orderTime;
NSInteger overdue = 24 * 60 * 60;//过期时间24小时
__block NSInteger leftTime = overdue - timeCha;
if (!(timeCha < overdue)) {
self.leftTimeLabel.text = @"超过支付时间";
self.payButton.enabled = NO;
}else {
//倒计时
self.payButton.enabled = YES;
//获取全局队列
dispatch_queue_t global = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
//创建一个定时器，并将定时器的任务交给全局队列执行(并行，不会造成主线程阻塞)
dispatch_source_t timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, global);
// 设置触发的间隔时间
dispatch_source_set_timer(timer, DISPATCH_TIME_NOW, 1.0 * NSEC_PER_SEC, 0 * NSEC_PER_SEC);
//1.0 * NSEC_PER_SEC 代表设置定时器触发的时间间隔为1s
//0 * NSEC_PER_SEC 代表时间允许的误差是 0s
//block内部 如果对当前对象的强引用属性修改 应该使用__weak typeof(self)weakSelf 修饰 避免循环调用
__weak typeof(self)weakSelf = self;
//设置定时器的触发事件
dispatch_source_set_event_handler(timer, ^{
leftTime --;
if (leftTime <= 0) {
//关闭定时器
dispatch_source_cancel(timer);
weakSelf.leftTimeLabel.text = @"超过支付时间";
weakSelf.payButton.enabled = NO;
//MRC下需要释放，这里不需要
// dispatch_realse(timer);
dispatch_async(dispatch_get_main_queue(), ^{
[weakSelf.leftTimeLabel setText:@"超过支付时间"];
});
}else {
//主线程修改UI
weakSelf.payButton.enabled = YES;
dispatch_async(dispatch_get_main_queue(), ^{
NSInteger hour = leftTime / 3600;
NSInteger min = (leftTime - hour * 3600)/60;
NSString * title = [NSString stringWithFormat:@"%ld小时%ld分钟",hour,min];
weakSelf.leftTimeLabel.text = title;
});
}
});
dispatch_resume(timer);
}
时间处理的相关代码
对时间相关的进行封装,一个项目里面有可能其他地方也会用到
.h文件代码如下
#import@interface TimeHandelTool : NSObject
//获取当前时间的 时间戳
+(NSInteger)getNowTimestamp;
//将某个时间转化成 时间戳
+(NSInteger)timeSwitchTimestamp:(NSString *)formatTime andFormatter:(NSString *)format;
//将某个时间戳转化成 时间
+(NSString *)timestampSwitchTime:(NSInteger)timestamp andFormatter:(NSString *)format;
@end
.m文件
#import "TimeHandelTool.h"
@implementation TimeHandelTool
#pragma mark - 获取当前时间的 时间戳
+(NSInteger)getNowTimestamp{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterMediumStyle];
[formatter setTimeStyle:NSDateFormatterShortStyle];
[formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"]; // ----------设置你想要的格式
//设置时区
NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];
[formatter setTimeZone:timeZone];
NSDate *datenow = [NSDate date];//现在时间
//时间转时间戳的方法:
NSInteger timeSp = [[NSNumber numberWithDouble:[datenow timeIntervalSince1970]] integerValue];
NSLog(@"设备当前的时间戳:%ld",(long)timeSp); //时间戳的值
return timeSp;
}
//将某个时间转化成 时间戳
#pragma mark - 将某个时间转化成 时间戳
+(NSInteger)timeSwitchTimestamp:(NSString *)formatTime andFormatter:(NSString *)format{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterMediumStyle];
[formatter setTimeStyle:NSDateFormatterShortStyle];
[formatter setDateFormat:format]; //(@"YYYY-MM-dd hh:mm:ss") ----------设置你想要的格式
NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];
[formatter setTimeZone:timeZone];
NSDate* date = [formatter dateFromString:formatTime]; //------------将字符串按formatter转成nsdate
//时间转时间戳的方法:
NSInteger timeSp = [[NSNumber numberWithDouble:[date timeIntervalSince1970]] integerValue];
return timeSp;
}
//将某个时间戳转化成 时间
#pragma mark - 将某个时间戳转化成 时间
+(NSString *)timestampSwitchTime:(NSInteger)timestamp andFormatter:(NSString *)format{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterMediumStyle];
[formatter setTimeStyle:NSDateFormatterShortStyle];
[formatter setDateFormat:format]; // （@"YYYY-MM-dd hh:mm:ss"）----------设置你想要的格式
NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];
[formatter setTimeZone:timeZone];
NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:timestamp];
NSString *confromTimespStr = [formatter stringFromDate:confromTimesp];
return confromTimespStr;
}
