Compare the number of different days between two dates, such as the number of months and the number of days

Compare the number of different days between two dates, such as the number of months and the number of days

// Compare the selected Start Time and End Time

+ (BOOL) ComparisonString :( NSString *) str1 andString :( NSString *) str2

{

// NSString * dateStr = @ "01:01:01"; // input time

// 1. Obtain the time

NSDate * senddate = [NSDate date];

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

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

NSString * locationString = [dateformatter stringFromDate: senddate];

Str2 = locationString;

NSArray * arrya1 = [str1 componentsSeparatedByString: @ ""];

Str1 = arrya1.firstObject;

Arrya1 = [str2 componentsSeparatedByString: @ ""];

Str2 = arrya1.firstObject;

NSString * dateStr = [NSString stringWithFormat: @ "%@ 00:00:01", str1];

// Input time

// Convert the input time to the required format

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

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

NSDate * fromdate = [format dateFromString: dateStr];

NSTimeZone * fromzone = [NSTimeZone systemTimeZone];

NSInteger frominterval = [fromzone secondsFromGMTForDate: fromdate];

NSDate * fromDate = [fromdate dateByAddingTimeInterval: frominterval];

NSLog (@ "call time = % @", fromDate );

// NSString * dateStr1 = @ "20:28:40"; // input time

NSString * dateStr1 = [NSString stringWithFormat: @ "%@ 23:59:59", str2];

// Input time

// Convert the input time to the required format

NSDateFormatter * format1 = [[NSDateFormatter alloc] init];

[Format1 setDateFormat: @ "yyyy-MM-dd HH: mm: ss"];

NSDate * fromdate1 = [format1 dateFromString: dateStr1];

NSTimeZone * fromzone1 = [NSTimeZone systemTimeZone];

NSInteger frominterval1 = [fromzone1 secondsFromGMTForDate: fromdate1];

NSDate * fromDate1 = [fromdate1 dateByAddingTimeInterval: frominterval1];

NSLog (@ "call time 1 = % @", fromDate1 );

Double intervalTime = [fromDate1 timeIntervalSinceReferenceDate]-[fromDate timeIntervalSinceReferenceDate];

Long lTime = (long) intervalTime;

NSInteger iDays = lTime/60/60/24;

// NSInteger iMonth = lTime/60/60/24/12;

// NSInteger iYears = lTime/60/60/24/384;

// NSInteger iSeconds = lTime % 60;

// NSInteger iMinutes = (lTime/60) % 60;

// NSLog (@ "dat = % d", iDays );

If (iDays <= 0 ){

Return NO;

} Else {

Return YES;

}

}