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我正在开发一个 iPhone 应用程序,该应用程序需要在加载带有相关参数的 Google 地图 URL 的 UIWebView 中显示从点 A 到另一点 B 的步行路线。

我正在加载的 URL 示例:

[self.myWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://maps.google.com/maps?saddr=55.720923,12.513428&daddr=55.745666,12.546387"]]];

我需要 UIWebView 将方向显示为地图(如地图上的线条),如下面的链接中所示:

我希望如何显示路线(路线作为地图)

但是,当这个 URL 加载到 iPhone 上时,路线会显示为一个列表(参见下面的链接)。

如何显示路线(路线作为列表)

用户需要按下顶部栏中的地图按钮才能将方向作为地图查看。

如何设置 Google 地图 URL 参数,以便在我的 iPhone 应用程序中直接将路线显示为地图(而不是列表!) ?

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2 回答 2

1

如果您使用来自 github 的MKMapView.check nvpolyline项目,这会容易得多。它将帮助您在 a 点到 b 点之间创建线,从而解决您的第一个问题。

对于第二个问题,在您的项目中添加此代码

NSString* apiUrlStr = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/directions/json?origin=%@&destination=%@&sensor=false", saddr, daddr];
    //&alternatives=true

    NSURL* apiUrl = [NSURL URLWithString:apiUrlStr];

    NSString *apiResponse = [NSString stringWithContentsOfURL:apiUrl];

    SBJsonParser *jsonParser = [SBJsonParser new];
    NSDictionary *jsonData = (NSDictionary *) [jsonParser objectWithString:apiResponse error:nil];

    NSLog(@"apiResponse is : %@",jsonData);

    //to display route in drop down

    NSArray *routeArray = [[NSArray alloc]init];
    routeArray= [jsonData objectForKey:@"routes"];

    for(int i=0;i<[routeArray count];i++)
    {
        NSDictionary *tempDictionary = [routeArray objectAtIndex:i];
        if([tempDictionary objectForKey:@"overview_polyline"]!=nil)
        {
            NSDictionary *secTempDictionary = [tempDictionary objectForKey:@"overview_polyline"];
            if([secTempDictionary objectForKey:@"points"]!=nil)
            {
                NSString * routePoint =[secTempDictionary objectForKey:@"points"];

                [routeSetAry addObject:routePoint];

                encodedPoints = [secTempDictionary objectForKey:@"points"];
            }
            // NSLog(@"secTempDictionary is: %@", secTempDictionary);
        } 
        if([tempDictionary objectForKey:@"legs"]!=nil)
        {
            NSArray *lagArray = [[NSArray alloc]init];
            lagArray= [tempDictionary objectForKey:@"legs"];

            for(int i=0;i<[lagArray count];i++)
            {
                NSDictionary *thirdTempDictionary = [lagArray objectAtIndex:i];
                if([thirdTempDictionary objectForKey:@"steps"]!=nil)
                {
                    NSArray *stepsArray = [[NSArray alloc]init];
                    stepsArray= [thirdTempDictionary objectForKey:@"steps"];

                    for(int i=0;i<[stepsArray count];i++)
                    {
                        NSDictionary *forthTempDictionary = [stepsArray objectAtIndex:i];

                        if([forthTempDictionary objectForKey:@"html_instructions"]!=nil)
                        {
                            NSString * directionStr =[forthTempDictionary objectForKey:@"html_instructions"];

                            NSRange range;
                            while ((range = [directionStr rangeOfString:@"<[^>]+>" options:NSRegularExpressionSearch]).location != NSNotFound){
                                directionStr=[directionStr stringByReplacingCharactersInRange:range withString:@""];
                            }
                            [directionStrAry addObject:directionStr];
                        }

                        NSDictionary *fifthTempDictionary = [forthTempDictionary objectForKey:@"polyline"];
                        if([fifthTempDictionary objectForKey:@"points"]!=nil)
                        {
                            NSString * routePoint =[fifthTempDictionary objectForKey:@"points"];

                            [polylineSetAry addObject:routePoint];

                           // encodedPoints = [fifthTempDictionary objectForKey:@"points"];
                        }
                        NSDictionary *sixthTempDictionary =[forthTempDictionary objectForKey:@"distance"];
                        if([sixthTempDictionary objectForKey:@"text"]!=nil)
                        {
                            NSString * distanceStr =[sixthTempDictionary objectForKey:@"text"];

                            [distanceStrAry addObject:distanceStr];

                            // encodedPoints = [fifthTempDictionary objectForKey:@"points"];
                        } 
                    }
                }
            }
        }  
    }

    NSLog(@"routeSetAry is :%@",routeSetAry);
 NSLog(@"polylineSetAry is : %i",polylineSetAry.count);

这将为您提供方向字符串数组,您可以使用此字符串在项目中的任何位置显示。

在我的项目中,我创建了一个显示在地图顶部的小视图,在该视图中,我一一显示方向。

于 2013-02-04T10:21:58.963 回答
0

我不确定,但你应该参考这个链接谷歌已经很好地解释了它“谷歌地图 URL 方案”

您可以使用

"comgooglemaps://?saddr=Google+Inc,+8th+Avenue,+New+York,+NY&daddr=John+F.+Kennedy+International+Airport,+Van+Wyck+Expressway,+Jamaica,+New+York&directionsmode =过境”

它具有不同的参数,例如 saddrdaddr方向模式

希望这可以帮助!

于 2013-10-01T05:58:48.837 回答