iOS开发之时间戳篇

//获得当前的时间戳,共10位数字,精确到秒
- (NSString *)getCurrentDateString
{  
NSTimeZone *zone = [NSTimeZone systemTimeZone];   
NSTimeInterval delta = [zone secondsFromGMTForDate:[NSDate date]];  
NSString *string = [NSString stringWithFormat:@"%f",[[NSDate date] timeIntervalSince1970] + delta];   
NSString *dateString = [[string componentsSeparatedByString:@"."]objectAtIndex:0];    
return dateString;
}