获取当前时间 时间戳

//获取系统当前的时间戳

NSDate* dat = [NSDate dateWithTimeIntervalSinceNow:0];

NSTimeInterval a=[dat timeIntervalSince1970]*1000;

NSString *timeString = [NSString stringWithFormat:@"%f", a];／／转为字符型

当前时间 到毫秒

NSString* date;

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

[formatter setDateFormat:@"YYYY.MM.dd.hh.mm.ss"];

[formatter setDateFormat:@"YYYY-MM-dd hh:mm:ss:SSS"];

date = [formatter stringFromDate:[NSDate date]];

timeNow = [[NSString alloc] initWithFormat:@"%@", date];

NSLog(@"%@", timeNow);