iOS 时间类常用方法
//当前日前日期
NSDate *today = [NSDate date];
//时区
NSTimeZone *zone = [NSTimeZone systemTimeZone];
//设置间隔
_interval = [zone secondsFromGMTForDate: today];
//今天+8小时（中国上海时区）
today = [today dateByAddingTimeInterval: _interval];
//获取明天日期
NSDate *tomorrowDate = [[NSDate alloc]initWithTimeInterval:24 * 60 * 60 sinceDate:[NSDate date]];
//日历
NSCalendar *calendar = [NSCalendar currentCalendar];
//comps里可以分离出时间年月日等信息
NSDateComponents *comps = [calendar components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekCalendarUnit | NSWeekdayCalendarUnit |NSWeekdayOrdinalCalendarUnit | NSHourCalendarUnit) fromDate:tomorrowDate];
//获取当前星期几
NSInteger weekday = [comps weekday];
//将NSString类型转换成NSDate
NSDate *serverDate = [dateFomatter dateFromString:serverTimeStr];
NSDate *createDate = [dateFomatter dateFromString:createTimeStr];
//算出两个Date的间隔
NSTimeInterval betweenTime = [serverDate timeIntervalSinceDate:createDate];
NSDateFormatter *dateFomatter = [[NSDateFormatter alloc]init];
[dateFomatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
//将string换成formatter形式
NSDate *stringDate = [dateFomatter dateFromString:string];
//formatter为月和日
[dateFomatter setDateFormat:@"MM-dd"];
//提取字符串中月和日
NSString *str1 = [dateFomatter stringFromDate:stringDate];
郑重声明：本站内容如果来自互联网及其他传播媒体，其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享，并不代表本站赞同其观点和对其真实性负责，也不构成任何其他建议。
