Mutual conversion of time and timestamp in iOS, ios time Conversion

Mutual conversion of time and timestamp in iOS, ios time Conversion

// Obtain the timestamp of the current system time

# Pragma mark-get the timestamp of the current time

+ (NSInteger) getNowTimestamp {

 

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

[Formatter setDateStyle: NSDateFormatterMediumStyle];

[Formatter setTimeStyle: nsdateformatter1_style];

[Formatter setDateFormat: @ "YYYY-MM-dd HH: mm: ss"]; // ---------- set the format you want. The difference between hh and HH is 12-hour, respectively, 24-hour system

// Set the time zone, which is sometimes important for Time Processing

NSTimeZone * timeZone = [NSTimeZone timeZoneWithName: @ "Asia/Beijing"];

[Formatter setTimeZone: timeZone];

NSDate * datenow = [NSDate date]; // current time

NSLog (@ "Current Device time: % @", [formatter stringFromDate: datenow]);

// Time to timestamp method:

NSInteger timeSp = [[NSNumber numberWithDouble: [datenow timeIntervalSince1970] integerValue];

NSLog (@ "Current Device timestamp: % ld", (long) timeSp); // The timestamp Value

Return timeSp;

}

 

// Convert a time to a timestamp

# Pragma mark-converts a time to a timestamp

+ (NSInteger) timeSwitchTimestamp :( NSString *) formatTime andFormatter :( NSString *) format {

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

[Formatter setDateStyle: NSDateFormatterMediumStyle];

[Formatter setTimeStyle: nsdateformatter1_style];

[Formatter setDateFormat: format]; // (@ "YYYY-MM-dd hh: mm: ss") ---------- set the format you want. The difference between hh and HH is as follows: 12-hour and 24-hour respectively

NSTimeZone * timeZone = [NSTimeZone timeZoneWithName: @ "Asia/Beijing"];

[Formatter setTimeZone: timeZone];

NSDate * date = [formatter dateFromString: formatTime]; // ------------ convert the string to nsdate by formatter

// Time to timestamp method:

NSInteger timeSp = [[NSNumber numberWithDouble: [date timeIntervalSince1970] integerValue];

NSLog (@ "convert a time to timestamp & timeSp: % ld", (long) timeSp); // The timestamp Value

Return timeSp;

}

 

// Convert a timestamp into a time

# Pragma mark-converts a timestamp into a time

+ (NSString *) timestampSwitchTime :( NSInteger) timestamp andFormatter :( NSString *) format {

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

[Formatter setDateStyle: NSDateFormatterMediumStyle];

[Formatter setTimeStyle: nsdateformatter1_style];

[Formatter setDateFormat: format]; // (@ "YYYY-MM-dd hh: mm: ss") ---------- set the format you want. The difference between hh and HH is as follows: 12-hour and 24-hour respectively

NSTimeZone * timeZone = [NSTimeZone timeZoneWithName: @ "Asia/Beijing"];

[Formatter setTimeZone: timeZone];

NSDate * confromTimesp = [NSDate dateWithTimeIntervalSince1970: timestamp];

NSLog (@ "1296035591 = % @", confromTimesp );

NSString * confromTimespStr = [formatter stringFromDate: confromTimesp];

// NSLog (@ "& confromTimespStr =: % @", confromTimespStr );

Return confromTimespStr;

}