iOS获取当前时间和时间戳

//获取当前日期
&＃43;(NSString*)getCurrentTimebyday{NSDateFormatter* nsdf2&＃61;[[NSDateFormatter alloc] init];[nsdf2 setDateStyle:NSDateFormatterShortStyle];[nsdf2 setDateFormat:&＃64;"YYYYMMdd"];return [nsdf2 stringFromDate:[NSDate date]];
}
//获取当前日期
&＃43;(NSString*)getCurrentTimebyseconds
{
// return &＃64;"1446440606485";NSDateFormatter* nsdf2&＃61;[[NSDateFormatter alloc] init];[nsdf2 setDateStyle:NSDateFormatterShortStyle];[nsdf2 setDateFormat:&＃64;"YYYYMMddHHmmss"];return [nsdf2 stringFromDate:[NSDate date]];
}//获取时间戳
&＃43;(NSString *)timespan{NSDate* date &＃61; [NSDate dateWithTimeIntervalSinceNow:0];NSTimeInterval a&＃61;[date timeIntervalSince1970]*1000;NSString *timespan &＃61; [NSString stringWithFormat:&＃64;"%.0f", a];
// NSInteger date&＃61;[[self getCurrentTimebyseconds] integerValue]*1000;
// NSString *timespan&＃61;[NSString stringWithFormat:&＃64;"%ld",[(long)date]t];return timespan;
}//获取GUID
&＃43; (NSString*) stringWithGUID {CFUUIDRef uuidObj &＃61; CFUUIDCreate(nil);//create a new UUID//get the string representation of the UUIDNSString *uuidString &＃61; (__bridge_transfer NSString*)CFUUIDCreateString(nil, uuidObj);CFRelease(uuidObj);return [uuidString lowercaseString];
}