1、獲取當(dāng)前時(shí)間
//獲取當(dāng)前時(shí)間,時(shí)間格式y(tǒng)yyyMMddHHmmssSSS
-(NSString * )getCurrentHourAndMinuteTime{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
// 設(shè)置想要的格式了罪，hh與HH的區(qū)別:分別表示12小時(shí)制,24小時(shí)制
[formatter setDateFormat:@"yyyyMMddHHmmssSSS"];
NSDate *dateNow = [NSDate date];
//把NSDate按formatter格式轉(zhuǎn)成NSString
NSString *currentTime = [formatter stringFromDate:dateNow];
return currentTime;
}
2、計(jì)算兩個(gè)時(shí)間點(diǎn)的時(shí)間差聪全，精確到毫秒泊藕，時(shí)間格式y(tǒng)yyyMMddHHmmssSSS
//獲取兩個(gè)時(shí)間點(diǎn)的時(shí)間差，精確到毫秒
-(double )getTimeDifferenceWithStartTime:(NSString * )startTime andEndTime:(NSString *)endTime{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyyMMddHHmmssSSS"];
NSDate* startTimeData = [dateFormatter dateFromString:startTime];
NSTimeInterval startTimeSp=[startTimeData timeIntervalSince1970]*1000;// *1000 是精確到毫秒难礼，不乘就是精確到秒
NSDate* endTimeData = [dateFormatter dateFromString:endTime];
NSTimeInterval endTimeSp=[endTimeData timeIntervalSince1970]*1000;
double difference = (endTimeSp - startTimeSp);
NSLog(@"開始時(shí)間：%@,結(jié)束時(shí)間：%@,兩個(gè)時(shí)間差為%lf秒",startTime,endTime, difference);
return difference;
}
3娃圆、獲取日期date對(duì)應(yīng)月的第一天日期
+ (NSString *)getMonthFirstDayWithDate:(NSDate *)date format:(NSDateFormatter *)myDateFormatter
{
NSDate *newDate = date;
double interval = 0;
NSDate *firstDate = nil;
NSCalendar *calendar = [NSCalendar currentCalendar];
BOOL bl = [calendar rangeOfUnit:NSCalendarUnitMonth startDate:& firstDate interval:&interval forDate:newDate];
if (bl) {
NSString *firstString = [myDateFormatter stringFromDate: firstDate];
return firstString;
}
return @"";
}
4、獲取日期date對(duì)應(yīng)月的最后一天日期
+ (NSString *)getMonthLastDayWithDate:(NSDate *)date format:(NSDateFormatter *)myDateFormatter
{
NSDate *newDate = date;
double interval = 0;
NSDate *firstDate = nil;
NSDate *lastDate = nil;
NSCalendar *calendar = [NSCalendar currentCalendar];
BOOL bl = [calendar rangeOfUnit:NSCalendarUnitMonth startDate:& firstDate interval:&interval forDate:newDate];
if (bl) {
lastDate = [firstDate dateByAddingTimeInterval:interval - 1];
NSString *lastString = [myDateFormatter stringFromDate: lastDate];
return lastString;
}
return @"";
}
5蛾茉、獲取對(duì)應(yīng)日期是周幾
+ (NSInteger)getWeekDayFromDate:(NSDate *)date
{
NSArray *tempWeek = @[@"7",@"1",@"2",@"3",@"4",@"5",@"6"];
NSCalendar *calendar = [[NSCalendar alloc]
initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDateComponents *comps = [[NSDateComponents alloc] init];
NSInteger unitFlags = NSCalendarUnitYear |NSCalendarUnitMonth | NSCalendarUnitDay |NSCalendarUnitWeekday | NSCalendarUnitHour |NSCalendarUnitMinute |NSCalendarUnitSecond;
comps = [calendar components:unitFlags fromDate:date];
// 1讼呢、2、3谦炬、4悦屏、5、6键思、7 分別對(duì)應(yīng) 周日础爬、周一、周二吼鳞、周三看蚜、周四、周五赔桌、周六
NSInteger week = [comps weekday];
NSLog(@"---%ld",week);
// 調(diào)整后 1 代表 周一
return [tempWeek[week-1] integerValue] ;
}
