我正在使用 MapKit api 获取地图上的当前位置,并绘制由落针指向的两个位置之间的路线。我还想获取其路线之间的所有主要看台。
我正在使用下面的函数来获取两个位置之间的路线
- (NSArray*)getRoutePointFrom:(MyLocation*)origin to:(MyLocation*)destination
{
NSString* saddr = [NSString stringWithFormat:@"%f,%f", origin.coordinate.latitude, origin.coordinate.longitude];
NSString* daddr = [NSString stringWithFormat:@"%f,%f", destination.coordinate.latitude, destination.coordinate.longitude];
NSURL *url=[NSURL URLWithString:[NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/directions/json?origin=%@&destination=%@&sensor=false&avoid=highways&mode=driving",saddr,daddr]];
NSError *error=nil;
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:url];
[request setHTTPMethod:@"POST"];
NSURLResponse *response = nil;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error: &error];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
SBJsonParser *json=[[SBJsonParser alloc] init];
NSDictionary *dic=[json objectWithString:responseString error:nil];
NSDictionary *nextdic=[dic valueForKey:@"routes"];
NSDictionary *legdic=[nextdic valueForKey:@"legs"];
NSDictionary *stepdic=[legdic valueForKey:@"steps"];
NSArray *array=[[NSArray alloc] initWithArray:[[stepdic valueForKey:@"polyline"] valueForKey:@"points"]];
NSString *string=[NSString stringWithFormat:@"%@",[[array objectAtIndex:0] objectAtIndex:0]];
return [self decodePolyLine:[string mutableCopy]];
}
-(NSMutableArray *)decodePolyLine:(NSString *)encodedStr
{
NSMutableString *encoded = [[NSMutableString alloc] initWithCapacity:[encodedStr length]];
[encoded appendString:encodedStr];
[encoded replaceOccurrencesOfString:@"\\\\" withString:@"\\"
options:NSLiteralSearch
range:NSMakeRange(0, [encoded length])];
NSInteger len = [encoded length];
NSInteger index = 0;
NSMutableArray *array = [[NSMutableArray alloc] init] ;
NSInteger lat=0;
NSInteger lng=0;
while (index < len) {
NSInteger b;
NSInteger shift = 0;
NSInteger result = 0;
do {
b = [encoded characterAtIndex:index++] - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
NSInteger dlat = ((result & 1) ? ~(result >> 1) : (result >> 1));
lat += dlat;
shift = 0;
result = 0;
do {
b = [encoded characterAtIndex:index++] - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
NSInteger dlng = ((result & 1) ? ~(result >> 1) : (result >> 1));
lng += dlng;
NSNumber *latitude = [[NSNumber alloc] initWithFloat:lat * 1e-5];
NSNumber *longitude = [[NSNumber alloc] initWithFloat:lng * 1e-5];
// printf("[%f,", [latitude doubleValue]);
// printf("%f]", [longitude doubleValue]);
CLLocation *loc =[[CLLocation alloc] initWithLatitude:[latitude floatValue] longitude:[longitude floatValue]] ;
[array addObject:loc];
}
NSLog(@"array in decode polygon is %@",array);
return array;
}
但它不起作用。 ..
有关于此的帮助
谢谢你!...
这个问题已经被问过好几次了。我猜你正在从以下位置获取代码http://iosguy.com/2012/05/22/tracing-routes-with-mapkit/ http://iosguy.com/2012/05/22/tracing-routes-with-mapkit/您还可以看看这个问题:在 iOS 中绘制多点路线 https://stackoverflow.com/questions/10639530/plotting-route-with-multiple-points-in-ios
您可以从以下位置获取代码http://iosboilerplate.com http://iosboilerplate.com也并为此做出贡献。
最后但并非最不重要的一点是,有一个框架可以帮助您花很少的钱来完成它(但与您做同样的事情相比,这没什么可比的):http://www.cocoacontrols.com/controls/mtdirectionskit http://www.cocoacontrols.com/controls/mtdirectionskit
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系:hwhale#tublm.com(使用前将#替换为@)