iOS开发之获取时间戳方法

// 得到当前本地时间，13位，整形

+ (long long)gs_getCurrentTimeToMilliSecond {

double currentTime = [[NSDate date] timeIntervalSince1970] * 1000;

long long iTime = (long long)currentTime;

return iTime;

}

//得到当前时间相对1970时间的字符串，精度到秒，返回10位长度字符串

+ (NSString *)gs_getCurrentTimeBySecond {

double currentTime =  [[NSDate date] timeIntervalSince1970];

NSString *strTime = [NSString stringWithFormat:@"%.0f",currentTime];

return strTime;

}

/** 得到当前时间相对1970时间的字符串，精度到毫秒，返回13位长度字符串*/

+ (NSString *)gs_getCurrentTimeStringToMilliSecond {

double currentTime =  [[NSDate date] timeIntervalSince1970]*1000;

NSString *strTime = [NSString stringWithFormat:@"%.0f",currentTime];

return strTime;

}