IOS managerTime

1. NSString ->NSdate

NSString *birthday =  self.btnBirthday.titleLabel.text;

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

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

NSDate *date = [dateFormatter dateFromString:birthday];

2.getcurrent time

#pragma  mark - 获取当前时间

-(NSDate *)getcurTime{

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

[formatter setDateFormat:@"yyyy-MM-dd"];

//NSString *dataTime = [formatter stringFromDate: [NSDate date]];//NsDate转Nsstring

return  [NSDate date];

}

3.compareTime

-(int)compareOneDay:(NSDate *)oneDay withAnotherDay:(NSDate *)anotherDay

{

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

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

NSString *oneDayStr = [dateFormatter stringFromDate:oneDay];

NSString *anotherDayStr = [dateFormatter stringFromDate:anotherDay];

NSDate *dateA = [dateFormatter dateFromString:oneDayStr];

NSDate *dateB = [dateFormatter dateFromString:anotherDayStr];

NSComparisonResult result = [dateA compare:dateB];

NSLog(@"date1 : %@, date2 : %@", oneDay, anotherDay);

if (result == NSOrderedDescending) {

//NSLog(@"Date1  is in the future");

return 1;

}

else if (result == NSOrderedAscending){

//NSLog(@"Date1 is in the past");

return -1;

}

//NSLog(@"Both dates are the same");

return 0;

}