Comparison of iOS development dates

Get current time:

NSDate * senddate=[nsdate Date];

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

[Dateformatter Setdateformat:@ "YYYYMMDD"];

NSString * Locationstring=[dateformatter stringfromdate:senddate];

NSLog (@ "locationstring:%@", locationstring);

[Dateformatter release];

Comparison of dates

1. Dates can be compared to determine size or equality, or you can determine the time interval between two dates. Two-day interval difference you can use the-timeintervalsincedate: method to calculate
　　

1. NSDate * now = [NSDate Date];
   
2. NSDate * Anhourago = [now datebyaddingtimeinterval:-60*60];
   
3. Nstimeinterval Timebetween = [now Timeintervalsincedate:anhourago];
   
4. NSLog (@ "%f", Timebetween);

2. Date comparisons can also be obtained using the-timeintervalsincenow method and the current time interval
　　

1. NSDate * Anhourago = [NSDate datewithtimeintervalsincenow;-60*60];
   
2. Nstimeinterval interval = [Anhourago timeintervalsincenow];
   
3. NSLog (@ "%f", interval);

The 3.NSDate also provides-laterdate,-earlierdate, and compare methods to compare dates
　　

1. NSDate * now = [NSDate Date];
   
2. NSDate * Anhourago = [now datebyaddingtimeinterval:-60*60];
   
3. NSDate *RESULT1 = [now Laterdate:anhourago];
   
4. NSDate * RESULT2 = [now Earlierdate:anhourago];
   
5. Nscomparisonresult RESULT3 = [now Compare:anhourago];

Comparison of iOS development dates