iOS计算两个时间戳的时间差

```

//计算两个时间戳的时间差

+ (NSString*)compareTwoTime:(longlong)time1 time2:(longlong)time2

{

NSTimeIntervalbalance = time2 /1000- time1 /1000;

NSString*timeString = [[NSStringalloc]init];

timeString = [NSStringstringWithFormat:@"%f",balance /60];

timeString = [timeStringsubstringToIndex:timeString.length-7];

NSIntegertimeInt = [timeStringintValue];

NSIntegerhour = timeInt /60;

NSIntegermint = timeInt %60;

if(hour ==0) {

timeString = [NSStringstringWithFormat:@"%ld分钟",(long)mint];

}

else

{

if(mint ==0) {

timeString = [NSStringstringWithFormat:@"%ld小时",(long)hour];

}

else

{

timeString = [NSStringstringWithFormat:@"%ld小时%ld分钟",(long)hour,(long)mint];

}

}

returntimeString;

}

@end

```