Unity64 AStarPath 寻路失效 Bug解决 IOS64 IL2CPP

把游戏项目迁移到IOS64 上面又出现了自动寻路无效的BUG，在XCode Console中有提示AStarpath异常，

Bad date/time format in the zip file在代码中查询得知是AStarpath在初始化时，会读取场景的寻路信息文件，但是由于DonetZip中的一个解析时间的Bug，导致异常，从而没有读取到场景自动寻路信息。

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我们从谷歌下载到DotnetZip的源代码，然后在整个项目中搜索异常信息，定位到文件 Shared.cs 文章来自播客

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internal static DateTime PackedToDateTime(Int32 packedDateTime){// workitem 7074 & workitem 7170if (packedDateTime == 0xFFFF || packedDateTime == 0)return new System.DateTime(1995, 1, 1, 0, 0, 0, 0); // return a fixed date when none is supplied.Int16 packedTime = unchecked((Int16)(packedDateTime & 0x0000ffff));Int16 packedDate = unchecked((Int16)((packedDateTime & 0xffff0000) >> 16));int year = 1980 + ((packedDate & 0xFE00) >> 9);int month = (packedDate & 0x01E0) >> 5;int day = packedDate & 0x001F;int hour = (packedTime & 0xF800) >> 11;int minute = (packedTime & 0x07E0) >> 5;//int second = packedTime & 0x001F;int second = (packedTime & 0x001F) * 2;// validation and error checking.// this is not foolproof but will catch most errors.if (second >= 60) { minute++; second = 0; }if (minute >= 60) { hour++; minute = 0; }if (hour >= 24) { day++; hour = 0; }DateTime d = System.DateTime.Now;bool success= false;try{d = new System.DateTime(year, month, day, hour, minute, second, 0);success= true;}catch (System.ArgumentOutOfRangeException){if (year == 1980 && (month == 0 || day == 0)){try{d = new System.DateTime(1980, 1, 1, hour, minute, second, 0);success= true;}catch (System.ArgumentOutOfRangeException){try{d = new System.DateTime(1980, 1, 1, 0, 0, 0, 0);success= true;}catch (System.ArgumentOutOfRangeException) { }}}// workitem 8814// my god, I can't believe how many different ways applications// can mess up a simple date format.else{try{while (year < 1980) year++;while (year > 2030) year–;while (month < 1) month++;while (month > 12) month–;while (day < 1) day++;while (day > 28) day–;while (minute < 0) minute++;while (minute > 59) minute–;while (second < 0) second++;while (second > 59) second–;d = new System.DateTime(year, month, day, hour, minute, second, 0);success= true;}catch (System.ArgumentOutOfRangeException) { }}}if (!success){string msg = String.Format("y({0}) m({1}) d({2}) h({3}) m({4}) s({5})", year, month, day, hour, minute, second);throw new ZipException(String.Format("Bad date/time format in the zip file. ({0})", msg));}// workitem 6191//d = AdjustTime_Reverse(d);d = DateTime.SpecifyKind(d, DateTimeKind.Local);return d;}文章来自播客 最后抛出异常！文章来自播客

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作为一个ZIP库，自然而然是需要读取文件中存储的时间信息的，但是我们这里用来作为读取AStarPath保存的寻路信息，那ZIP中的时间数据对我们来说一点用处没有，所以

我们也不用管为什么会抛出异常，直接返回一个时间，我这里就返回现在时间吧！ 文章来自播客

修改后的函数

internal static DateTime PackedToDateTime(Int32 packedDateTime){return System.DateTime.Now;// workitem 7074 & workitem 7170if (packedDateTime == 0xFFFF || packedDateTime == 0)return new System.DateTime(1995, 1, 1, 0, 0, 0, 0); // return a fixed date when none is supplied.Int16 packedTime = unchecked((Int16)(packedDateTime & 0x0000ffff));Int16 packedDate = unchecked((Int16)((packedDateTime & 0xffff0000) >> 16));int year = 1980 + ((packedDate & 0xFE00) >> 9);int month = (packedDate & 0x01E0) >> 5;int day = packedDate & 0x001F;int hour = (packedTime & 0xF800) >> 11;int minute = (packedTime & 0x07E0) >> 5;//int second = packedTime & 0x001F;int second = (packedTime & 0x001F) * 2;// validation and error checking.// this is not foolproof but will catch most errors.if (second >= 60) { minute++; second = 0; }if (minute >= 60) { hour++; minute = 0; }if (hour >= 24) { day++; hour = 0; }DateTime d = System.DateTime.Now;bool success= false;try{d = new System.DateTime(year, month, day, hour, minute, second, 0);success= true;}catch (System.ArgumentOutOfRangeException){if (year == 1980 && (month == 0 || day == 0)){try{d = new System.DateTime(1980, 1, 1, hour, minute, second, 0);success= true;}catch (System.ArgumentOutOfRangeException){try{d = new System.DateTime(1980, 1, 1, 0, 0, 0, 0);success= true;}catch (System.ArgumentOutOfRangeException) { }}}// workitem 8814// my god, I can't believe how many different ways applications// can mess up a simple date format.else{try{while (year < 1980) year++;while (year > 2030) year–;while (month < 1) month++;while (month > 12) month–;while (day < 1) day++;while (day > 28) day–;while (minute < 0) minute++;while (minute > 59) minute–;while (second < 0) second++;while (second > 59) second–;d = new System.DateTime(year, month, day, hour, minute, second, 0);success= true;}catch (System.ArgumentOutOfRangeException) { }}}if (!success){string msg = String.Format("y({0}) m({1}) d({2}) h({3}) m({4}) s({5})", year, month, day, hour, minute, second);throw new ZipException(String.Format("Bad date/time format in the zip file. ({0})", msg));}// workitem 6191//d = AdjustTime_Reverse(d);d = DateTime.SpecifyKind(d, DateTimeKind.Local);return d;}文章来自播客 下面附上DonetZIP的项目源代码以及编译好的DLL，，大家可以下载源代码自行编译或者直接替换DLL即可。 文章来自播客

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其实，每个人都是幸福的。只是，你的幸福，常常在别人眼里。