Calculates the specified time and current difference for example, 3 days ago, 10 minutes ago

Calculates the specified time and the current difference, for example, 3 days ago, 10 minutes ago (this is often encountered in the project, so recorded)

Here's how it's implemented:

/**

* Calculates the specified time and the current difference

* @param comparedate A specified time

* @return How much ( seconds or minutes or days or months or years) + before ( e.g. 3 days ago, ten minutes ago)

*/

+ (NSString *) Comparecurrenttime: (nsdate*) comparedate

//

{

nstimeinterval timeinterval = [comparedate timeintervalsincenow];

TimeInterval =-timeinterval;

Long temp = 0;

nsstring *result;

if (TimeInterval < ) {

result = [nsstringstringWithFormat:@ " just "];

}

Else if ((temp = timeinterval/) <) {

result = [nsstringstringWithFormat:@ "%d minutes ago ", temp];

}

Else if ((temp = temp/) <) {

result = [nsstringstringWithFormat:@ "%d small front ", temp];

}

Else if ((temp = temp/) <) {

result = [nsstringstringWithFormat:@ "%d days ago ", temp];

}

Else if ((temp = temp/) <) {

result = [nsstringstringWithFormat:@ "%d months ago ", temp];

}

else{

temp = temp/;

result = [nsstringstringWithFormat:@ "%d years ago ", temp];

}

return result;

}

The following are common methods in NSDate:

/**

-(ID) Initwithtimeinterval: (nstimeinterval) secs sincedate: (NSDate *) refdate;

Initialized to refdate, then secs seconds later.

-(ID) Initwithtimeintervalsincenow: (nstimeinterval) secs;

Initialized to the current time, and then secs seconds later

-(Nstimeinterval) Timeintervalsincedate: (NSDate *) refdate;

Returns the time interval between the time the instance was saved and the refdate , with Refdate as the base time

-(Nstimeinterval) Timeintervalsincenow;

Returns the time between the time that the instance was saved and the current time ( now ) at the current time (now)

-(Nstimeinterval) timeIntervalSince1970;

returns the time between the time the instance was saved and 1970/01/01 GMT, with 1970/01/01 GMT as the base time

-(Nstimeinterval) timeintervalsincereferencedate;

returns the time between the time the instance was saved and 2001/01/01 GMT, with 2001/01/01 GMT as the base time

+ (Nstimeinterval) timeintervalsincereferencedate;

*/

// sec

-(Nstimeinterval) Timeintervalsincenow;

Returns the time between the time that the instance was saved and the current time ( now ) at the current time (now)

Calculates the specified time and current difference for example, 3 days ago, 10 minutes ago