我的项目之前运行正常，如果使用模拟器仍然运行正常。但当我连接iPhone并尝试运行项目时，我收到此错误：“检索JSON信息时”下划线的模糊使用...
这是我的示例代码。
let data = NSData(contentsOfURL: url!)
let json=
NSJSONSerialization.JSONObjectWithData(data!, options: .AllowFragments)
routesInfo = json.objectForKey("routes")
for i in 0 ..< routesInfo!.count
{
let routes = json.objectForKey("routes")![i] //ERROR_LINE
let overview = routes!.objectForKey("overview_polyline")
let point = overview!.objectForKey("points")
let path = GMSPath(fromEncodedPath: (point as? String)!)
let polyline = GMSPolyline(path: path)
polyline.strokeWidth = 6.0
polyline.map = mapView
}
Google地图返回的完整JSON是：
{
"geocoded_waypoints" : [
{
"geocoder_status" : "OK",
"place_id" : "ChIJRVR9ciHP5zsRsRVN9_E-fb0",
"types" : [ "premise" ]
},
{
"geocoder_status" : "OK",
"place_id" : "ChIJpapok9jO5zsRIL5b1p9GhF4",
"types" : [ "route" ]
}
],
"routes" : [
{
"bounds" : {
"northeast" : {
"lat" : 19.024652,
"lng" : 72.8565404
},
"southwest" : {
"lat" : 19.0176492,
"lng" : 72.84871849999999
}
},
"copyrights" : "Map data ©2016 Google",
"legs" : [
{
"distance" : {
"text" : "2.0 km",
"value" : 1992
},
"duration" : {
"text" : "6 mins",
"value" : 371
},
"end_address" : "King's Cir Flyover, Parsi Colony, Matunga, Mumbai, Maharashtra 400014, India",
"end_location" : {
"lat" : 19.024652,
"lng" : 72.8531031
},
"start_address" : "Dheeraj Enclave, Wadala West, Wadala, Mumbai, Maharashtra 400031, India",
"start_location" : {
"lat" : 19.0176492,
"lng" : 72.8561606
},
"steps" : [
{
"distance" : {
"text" : "41 m",
"value" : 41
},
"duration" : {
"text" : "1 min",
"value" : 9
},
"end_location" : {
"lat" : 19.0178793,
"lng" : 72.8558529
},
"html_instructions" : "Head \u003cb\u003enorthwest\u003c/b\u003e on \u003cb\u003eRd Number 19\u003c/b\u003e toward \u003cb\u003eBalaram Babu Khedekar Marg\u003c/b\u003e",
"polyline" : {
"points" : "ikasB_vt{Lm@|@"
},
"start_location" : {
"lat" : 19.0176492,
"lng" : 72.8561606
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "85 m",
"value" : 85
},
"duration" : {
"text" : "1 min",
"value" : 28
},
"end_location" : {
"lat" : 19.0182834,
"lng" : 72.8565404
},
"html_instructions" : "Turn \u003cb\u003eright\u003c/b\u003e onto \u003cb\u003eBalaram Babu Khedekar Marg\u003c/b\u003e",
"maneuver" : "turn-right",
"polyline" : {
"points" : "wlasBatt{Lo@yAUa@IM"
},
"start_location" : {
"lat" : 19.0178793,
"lng" : 72.8558529
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "82 m",
"value" : 82
},
"duration" : {
"text" : "1 min",
"value" : 22
},
"end_location" : {
"lat" : 19.0187209,
"lng" : 72.85590959999999
},
"html_instructions" : "Turn \u003cb\u003eleft\u003c/b\u003e after Excise & Customs Residential Colony (on the left)",
"maneuver" : "turn-left",
"polyline" : {
"points" : "goasBkxt{Lg@x@Q`@]`@"
},
"start_location" : {
"lat" : 19.0182834,
"lng" : 72.8565404
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "0.2 km",
"value" : 244
},
"duration" : {
"text" : "1 min",
"value" : 40
},
"end_location" : {
"lat" : 19.0199158,
"lng" : 72.85405589999999
},
"html_instructions" : "At the roundabout, continue straight onto \u003cb\u003eLady Jehangir Rd\u003c/b\u003e",
"maneuver" : "roundabout-left",
"polyline" : {
"points" : "_rasBmtt{L?@@@?@@??@?@?@@??@?@?@?@A??@?@?@A@?@A@A@?@A?A@A?A@A?A??@A?A?A?A?AAaCdEuAbC"
},
"start_location" : {
"lat" : 19.0187209,
"lng" : 72.85590959999999
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "0.3 km",
"value" : 273
},
"duration" : {
"text" : "1 min",
"value" : 46
},
"end_location" : {
"lat" : 19.0212656,
"lng" : 72.8521094
},
"html_instructions" : "At the roundabout, take the \u003cb\u003e2nd\u003c/b\u003e exit and stay on \u003cb\u003eLady Jehangir Rd\u003c/b\u003e",
"maneuver" : "roundabout-left",
"polyline" : {
"points" : "oyasB{ht{L@@@B@B?F@D?F?DAHAFCFADADCBGHEFKHGDGBIBI@K?ICkAxBeBrC"
},
"start_location" : {
"lat" : 19.0199158,
"lng" : 72.85405589999999
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "0.3 km",
"value" : 298
},
"duration" : {
"text" : "1 min",
"value" : 88
},
"end_location" : {
"lat" : 19.0226609,
"lng" : 72.84999250000001
},
"html_instructions" : "At the roundabout, take the \u003cb\u003e2nd\u003c/b\u003e exit and stay on \u003cb\u003eLady Jehangir Rd\u003c/b\u003e",
"maneuver" : "roundabout-left",
"polyline" : {
"points" : "}absBu|s{LB@@BB@@B@B?@@B@B?B?B?B?B?BABABADCDA@C@A@C@C@C@A?C@C?C?C?CACAA?CACA}AhC[h@m@jA}@~A"
},
"start_location" : {
"lat" : 19.0212656,
"lng" : 72.8521094
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "0.2 km",
"value" : 233
},
"duration" : {
"text" : "1 min",
"value" : 50
},
"end_location" : {
"lat" : 19.020958,
"lng" : 72.84870769999999
},
"html_instructions" : "At \u003cb\u003eDr GM Phadke Chowk\u003c/b\u003e, take the \u003cb\u003e1st\u003c/b\u003e exit onto \u003cb\u003eSir Bhalchandra Rd\u003c/b\u003e",
"maneuver" : "roundabout-left",
"polyline" : {
"points" : "sjbsBmos{L\\VtCpB~CtB"
},
"start_location" : {
"lat" : 19.0226609,
"lng" : 72.84999250000001
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "0.1 km",
"value" : 124
},
"duration" : {
"text" : "1 min",
"value" : 39
},
"end_location" : {
"lat" : 19.0202794,
"lng" : 72.84958060000001
},
"html_instructions" : "At the roundabout, take the \u003cb\u003e1st\u003c/b\u003e exit onto \u003cb\u003eKhareghat Rd\u003c/b\u003e",
"maneuver" : "roundabout-left",
"polyline" : {
"points" : "_`bsBmgs{L@A@??A@A@A@?@A@?@A@?@?@?@?@?@?@??@@?zAoCJS"
},
"start_location" : {
"lat" : 19.020958,
"lng" : 72.84870769999999
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "0.6 km",
"value" : 612
},
"duration" : {
"text" : "1 min",
"value" : 49
},
"end_location" : {
"lat" : 19.024652,
"lng" : 72.8531031
},
"html_instructions" : "\u003cb\u003eKhareghat Rd\u003c/b\u003e turns \u003cb\u003eleft\u003c/b\u003e and becomes \u003cb\u003eKing's Cir Flyover\u003c/b\u003e",
"polyline" : {
"points" : "w{asB{ls{LSMsGoE}@m@_Aq@eAw@y@o@y@o@_@Yg@a@o@g@m@g@q@o@q@m@"
},
"start_location" : {
"lat" : 19.0202794,
"lng" : 72.84958060000001
},
"travel_mode" : "DRIVING"
}
],
"traffic_speed_entry" : [],
"via_waypoint" : []
}
],
"overview_polyline" : {
"points" : "ikasB_vt{Lm@|@o@yA_@o@y@zA]b@BB?D?HCHOHE?cCbEsAdCDTC^KVMPSNQFU@ICkAxBeBrCB@DDBFBL?NIRKFMDOAMEyBrDkBjDrDhC`DrBBCDCHAH@fBcDgH}E}B_B_CgBqDsCqCeC"
},
"summary" : "Lady Jehangir Rd and King's Cir Flyover",
"warnings" : [],
"waypoint_order" : []
},
{
"bounds" : {
"northeast" : {
"lat" : 19.024652,
"lng" : 72.8565404
},
"southwest" : {
"lat" : 19.0172015,
"lng" : 72.8474793
}
},
"copyrights" : "Map data ©2016 Google",
"legs" : [
{
"distance" : {
"text" : "2.3 km",
"value" : 2260
},
"duration" : {
"text" : "7 mins",
"value" : 392
},
"end_address" : "King's Cir Flyover, Parsi Colony, Matunga, Mumbai, Maharashtra 400014, India",
"end_location" : {
"lat" : 19.024652,
"lng" : 72.8531031
},
"start_address" : "Dheeraj Enclave, Wadala West, Wadala, Mumbai, Maharashtra 400031, India",
"start_location" : {
"lat" : 19.0176492,
"lng" : 72.8561606
},
"steps" : [
{
"distance" : {
"text" : "41 m",
"value" : 41
},
"duration" : {
"text" : "1 min",
"value" : 9
},
"end_location" : {
"lat" : 19.0178793,
"lng" : 72.8558529
},
"html_instructions" : "Head \u003cb\u003enorthwest\u003c/b\u003e on \u003cb\u003eRd Number 19\u003c/b\u003e toward \u003cb\u003eBalaram Babu Khedekar Marg\u003c/b\u003e",
"polyline" : {
"points" : "ikasB_vt{Lm@|@"
},
"start_location" : {
"lat" : 19.0176492,
"lng" : 72.8561606
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "85 m",
"value" : 85
},
"duration" : {
"text" : "1 min",
"value" : 28
},
"end_location" : {
"lat" : 19.0182834,
"lng" : 72.8565404
},
"html_instructions" : "Turn \u003cb\u003eright\u003c/b\u003e onto \u003cb\u003eBalaram Babu Khedekar Marg\u003c/b\u003e",
"maneuver" : "turn-right",
"polyline" : {
"points" : "wlasBatt{Lo@yAUa@IM"
},
"start_location" : {
"lat" : 19.0178793,
"lng" : 72.8558529
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "82 m",
"value" : 82
},
"duration" : {
"text" : "1 min",
"value" : 22
},
"end_location" : {
"lat" : 19.0187209,
"lng" : 72.85590959999999
},
"html_instructions" : "Turn \u003cb\u003eleft\u003c/b\u003e after Excise & Customs Residential Colony (on the left)",
"maneuver" : "turn-left",
"polyline" : {
"points" : "goasBkxt{Lg@x@Q`@]`@"
},
"start_location" : {
"lat" : 19.0182834,
"lng" : 72.8565404
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "0.2 km",
"value" : 244
},
"duration" : {
"text" : "1 min",
"value" : 40
},
"end_location" : {
"lat" : 19.0199158,
"lng" : 72.85405589999999
},
"html_instructions" : "At the roundabout, continue straight onto \u003cb\u003eLady Jehangir Rd\u003c/b\u003e",
"maneuver" : "roundabout-left",
"polyline" : {
"points" : "_rasBmtt{L?@@@?@@??@?@?@@??@?@?@?@A??@?@?@A@?@A@A@?@A?A@A?A@A?A??@A?A?A?A?AAaCdEuAbC"
},
"start_location" : {
"lat" : 19.0187209,
"lng" : 72.85590959999999
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "0.7 km",
"value" : 661
},
"duration" : {
"text" : "2 mins",
"value" : 116
},
"end_location" : {
"lat" : 19.0172015,
"lng" : 72.84873309999999
},
"html_instructions" : "At the roundabout, take the \u003cb\u003e1st\u003c/b\u003e exit onto \u003cb\u003eMancherji Joshi Rd\u003c/b\u003e\u003cdiv style=\"font-size:0.9em\"\u003eGo through 1 roundabout\u003c/div\u003e",
"maneuver" : "roundabout-left",
"polyline" : {
"points" : "oyasB{ht{L@@@B@B?F@D?F?DAHAFCFADADCBGHEF`AlBdDvGjAhC|@lBrBbF@?@?@?@??@@?@??@@??@@??@@??@?@@??@?@?@?@?@?@?@A??@?@A?~@fA"
},
"start_location" : {
"lat" : 19.0199158,
"lng" : 72.85405589999999
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "92 m",
"value" : 92
},
"duration" : {
"text" : "1 min",
"value" : 34
},
"end_location" : {
"lat" : 19.0175873,
"lng" : 72.8479641
},
"html_instructions" : "Turn \u003cb\u003eright\u003c/b\u003e onto \u003cb\u003eDr Babasahed Ambedkar Rd\u003c/b\u003e/\u003cb\u003eTilak Rd\u003c/b\u003e",
"maneuver" : "turn-right",
"polyline" : {
"points" : "ohasBqgs{Ls@nAYhA"
},
"start_location" : {
"lat" : 19.0172015,
"lng" : 72.84873309999999
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "0.4 km",
"value" : 431
},
"duration" : {
"text" : "2 mins",
"value" : 93
},
"end_location" : {
"lat" : 19.0203431,
"lng" : 72.8494846
},
"html_instructions" : "At \u003cb\u003eKhodadad Cir\u003c/b\u003e, take the \u003cb\u003e3rd\u003c/b\u003e exit onto \u003cb\u003eDr Baba Saheb Ambedkar Rd\u003c/b\u003e",
"maneuver" : "roundabout-left",
"polyline" : {
"points" : "}jasBwbs{LBBBD@DBD@D?F@D?DADADADADCBCBEBCBC@C@C@C?A@C?C?C?GAGAGCECEEECEGCEACACACAC?EAC?CAC_MiI"
},
"start_location" : {
"lat" : 19.0175873,
"lng" : 72.8479641
},
"travel_mode" : "DRIVING"
},
{
"distance" : {
"text" : "0.6 km",
"value" : 624
},
"duration" : {
"text" : "1 min",
"value" : 50
},
"end_location" : {
"lat" : 19.024652,
"lng" : 72.8531031
},
"html_instructions" : "Turn \u003cb\u003eright\u003c/b\u003e at \u003cb\u003eDattray Shankar Nadkarni Chowk\u003c/b\u003e onto \u003cb\u003eKing's Cir Flyover\u003c/b\u003e\u003cdiv style=\"font-size:0.9em\"\u003eDestination will be on the left\u003c/div\u003e",
"maneuver" : "turn-right",
"polyline" : {
"points" : "c|asBgls{LJSSMsGoE}@m@_Aq@eAw@y@o@y@o@_@Yg@a@o@g@m@g@q@o@q@m@"
},
"start_location" : {
"lat" : 19.0203431,
"lng" : 72.8494846
},
"travel_mode" : "DRIVING"
}
],
"traffic_speed_entry" : [],
"via_waypoint" : [
{
"location" : {
"lat" : 19.0175605,
"lng" : 72.84923569999999
},
"step_index" : 4,
"step_interpolation" : 0.8934055159711098
}
]
}
],
"overview_polyline" : {
"points" : "ikasB_vt{Lm@|@o@yA_@o@y@zA]b@BB?D?HCHOHE?cCbEsAdCDTC^KVMPfFdKhCvFtBbF@?D@B@DJAJ?@A?~@fAs@nAYhABBDJFXEVOPOHM@[GWUIQCQAC_MiIJSSMqI}FeCiB{D{C}AoAcB}A"
},
"summary" : "King's Cir Flyover",
"warnings" : [],
"waypoint_order" : []
}
],
"status" : "OK"
}
答案 0 :(得分：0)
你的问题是你只是强迫展开事物并最终得到AnyObject个引用，所以Swift无法真正验证你要求它做的事情。
我建议您在防御性方面编码：
if let routesInfo = json["routes"] as? [[String:AnyObject]] {
for routes in routesInfo {
if let overview = routes["overview_polyline"] as? [String:AnyObject] {
if let point = overview["points"] as? String {
let path = GMSPath(fromEncodedPath: point)
let polyline = GMSPolyline(path: path)
polyline.strokeWidth = 6.0
polyline.map = mapView
}
}
}
}