将yyyy MM dd HH mm ss格式时间转换成时间戳

+(long)changeTimeToTimeSp:(NSString *)timeStr{ long time; NSDateFormatter *format=[[NSDateFormatter alloc] init]; [format setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; NSDate *fromdate=[format dateFromString:timeStr]; time= (long)[fromdate timeIntervalSince1970];

return time;

}