// 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;
}
原文：https://www.cnblogs.com/hecanlin/p/10753002.html