解释来自 Google 服务器的 API 响应

发布于 2024-12-11 18:36:21 字数 1514 浏览 0 评论 0原文

我正在开发一个基于位置的应用程序。应用程序将显示到位置之间的路线以及逐向方向（如在具有所有节点的本机“地图”应用程序中）。我请求谷歌地图以下列方式获取方向。（作为库比蒂诺和斯坦福之间的示例方向）

NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.google.com/maps?dirflg=d&output=dragdir&saddr=Stanford&daddr=cupertino"];
    NSURL* apiUrl = [NSURL URLWithString:apiUrlStr];

    NSError* error = nil;
    NSString* apiResponse = [NSString stringWithContentsOfURL:apiUrl encoding:NSASCIIStringEncoding error:&error];
    NSLog(@"apiResponse=%@", apiResponse);

在控制台我得到响应

{tooltipHtml:" (12.9\x26#160;mi / 19分钟)",折线:[{id:"route0",点:"kklcFzishVdBb@??@s@rB{PHi@Xk@??bEmDrDgF~DeHVcAhCgG??rFfEv@RbFHnEa@vBGnE d@\\P~EjGtMxK??zNwTxB_ChCqD??bAt@bDdBvDt@~BXrC@xBS|NiClA@fAPvBdA~@dAlIQAxAr@n@|@d@rFxA|AlA AnAz@t@l@@nAd@zQnC??bA\\^XVr@Az@KVa@\\m@B[UWq@?i@zBaI@oBd@mDt@kS~@kG AoDrA_DhAqB~AkBlCuBlDiB ~Cw@lU}CbBa@~B{@jE_CvAgAjDyDhQ{SvFuFpUgSzD{EdAcBBiDlA_DfAaEbIk@r@mERyBZkMXkHX{DjA{GtBaG|CcFxC{CfA y@vUaMjDmEva}BxCkGAwCfAyEtCiRv@{ClB_F|B_EpDkEvAoAdGcE|FwEbBmBvBmDhAiCtMma@dAcCrBmDLiNlB{CfAcCtEaM tKsUCmEdP{WbB_EbAoDr@}Dd@aFLkCC_FK_C{C}YMqGPsGRyC\eCdAeFpCaLdBiJXcENgHa@qIcIwo@[DWeFKk[Dyc@??\gHbAg我？@??|bAG???s@_@?",级别："BBB???BB????BB?@???@??BB??BB???@ ??????@??????@??????@BB??????@???@??????@???@??????@？？？？？？@？？？@？？？？@？@？？？？？@？？？？？@？？？？？？@？？@？？@？？？？？一个？？ ?@???@??????@???@?BB??BBBB?B",numLevel`s:4,zoomFactor:16}]}

我无法理解上面的回复。此响应是否包含逐段指示？如果没有，如何获得这些指示？

原文

I am developing a Location based application. application will show route between to locations with turn by turn directions(as in native "Maps" application with all the nodes). I am requesting to google maps for directions in following way.(as example directions between cupertino and stanford)

NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.google.com/maps?dirflg=d&output=dragdir&saddr=Stanford&daddr=cupertino"];
    NSURL* apiUrl = [NSURL URLWithString:apiUrlStr];

    NSError* error = nil;
    NSString* apiResponse = [NSString stringWithContentsOfURL:apiUrl encoding:NSASCIIStringEncoding error:&error];
    NSLog(@"apiResponse=%@", apiResponse);

At the console I got response

{tooltipHtml:" (12.9\x26#160;mi / 19 mins)",polylines:[{id:"route0",points:"kklcFzishVdBb@??@s@rB{PHi@Xk@??bEmDrDgF~DeHVcAhCgG??rFfEv@RbFHnEa@vBGnEd@\\P~EjGtMxK??zNwTxB_ChCqD??bAt@bDdBvDt@~BXrC@xBS|NiClA@fAPvBdA~@dAlIQAxAr@n@|@d@rFxA|AlAAnAz@t@l@@nAd@zQnC??bA\\^XVr@Az@KVa@\\m@B[UWq@?i@zBaI@oBd@mDt@kS~@kGAoDrA_DhAqB~AkBlCuBlDiB~Cw@lU}CbBa@~B{@jE_CvAgAjDyDhQ{SvFuFpUgSzD{EdAcBBiDlA_DfAaEbIk@r@mERyBZkMXkHX{DjA{GtBaG|CcFxC{CfAy@vUaMjDmEvA}BxCkGAwCfAyEtCiRv@{ClB_F|B_EpDkEvAoAdGcE|FwEbBmBvBmDhAiCtMma@dAcCrBmDLiNlB{CfAcCtEaMtKsUCmEdP{WbB_EbAoDr@}Dd@aFLkCC_FK_C{C}YMqGPsGRyC\eCdAeFpCaLdBiJXcENgHa@qIcIwo@[DWeFKk[Dyc@??\gHbAgI?@??|bAG???s@_@?",levels:"BBB???BB????BB?@???@??BB??BB???@????@????@??????@BB?????@???@????@???@??????@??????@???@????@?@?????@?????@??????@??@??@?????A???@????@??????@???@?BB??BBBB?B",numLevel`s:4,zoomFactor:16}]}

I am not able understand above response. Does this response contains turn by turn directions? If not how can get these directions?

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