在 iphone 的地图上绘制路径答案

【问题标题】：draw path on map in iphone在 iphone 的地图上绘制路径
【发布时间】：2009-04-26 05:49:51
【问题描述】：

我正在为 iPhone 使用Route-Me 库。例如，我的问题是我想在地图上画一条路径。

我在达拉斯，我想去纽约，然后我将标记在这两个地方，然后在这两个标记之间绘制路径。

任何机构都可以建议我如何做到这一点。

如果有其他 Map 而不是 RouteMe 也可以。

【问题讨论】：

标签： iphone objective-c

【解决方案1】：

以下代码将在 2 个点之间绘制路径。（在您的情况下，您必须添加所有路线点）

// Set map view center coordinate
CLLocationCoordinate2D center;
center.latitude = 47.582;
center.longitude = -122.333;
slideLocation = center;
[mapView.contents moveToLatLong:center];
[mapView.contents setZoom:17.0f];

// Add 2 markers(start/end)  and RMPath with 2 points
RMMarker *newMarker;
UIImage *startImage = [UIImage imageNamed:@"marker-blue.png"];
UIImage *finishImage = [UIImage imageNamed:@"marker-red.png"];
UIColor* routeColor = [[UIColor alloc] initWithRed:(27.0 /255) green:(88.0 /255) blue:(156.0 /255) alpha:0.75];
RMPath* routePath = [[RMPath alloc] initWithContents:mapView.contents];
[routePath setLineColor:routeColor];
[routePath setFillColor:routeColor];
[routePath setLineWidth:10.0f];
[routePath setDrawingMode:kCGPathStroke];
CLLocationCoordinate2D newLocation;
newLocation.latitude = 47.580;
newLocation.longitude = -122.333;   
[routePath addLineToLatLong:newLocation];
newLocation.latitude = 47.599;
newLocation.longitude = -122.333;   
[routePath addLineToLatLong:newLocation];
[[mapView.contents overlay] addSublayer:routePath];

newLocation.latitude = 47.580;
newLocation.longitude = -122.333;   
newMarker = [[RMMarker alloc] initWithUIImage:startImage anchorPoint:CGPointMake(0.5, 1.0)];
[mapView.contents.markerManager addMarker:newMarker AtLatLong:newLocation];
[newMarker release];
newMarker = nil;

newLocation.latitude = 47.599;
newLocation.longitude = -122.333;   
newMarker = [[RMMarker alloc] initWithUIImage:finishImage anchorPoint:CGPointMake(0.5, 1.0)];
[mapView.contents.markerManager addMarker:newMarker AtLatLong:newLocation];
[newMarker release];
newMarker = nil;

【讨论】：

【解决方案2】：

Route-me 有一个 RMPath 用于此目的的类。你玩过它吗？如果是这样，你做了什么，做了什么，什么没用？

【讨论】：

【解决方案3】：

Route-Me 例如如何在地图上画一条路径，不完全但是很接近。

使用 RMPath 在叠加层上绘制多边形

//polygonArray is a NSMutableArray of CLLocation
- (RMPath*)addLayerForPolygon:(NSMutableArray*)polygonArray toMap:(RMMapView*)map {
    RMPath* polygonPath = [[[RMPath alloc] initForMap:map] autorelease];
    [polygonPath setLineColor:[UIColor colorWithRed:1 green:0 blue:0 alpha:0.5]];
    [polygonPath setFillColor:[UIColor colorWithRed:1 green:0 blue:0 alpha:0.5]];
    [polygonPath setLineWidth:1];

    BOOL firstPoint = YES;
    for (CLLocation* loc in polygonArray) {
        if (firstPoint) {
            [polygonPath moveToLatLong:loc.coordinate];
            firstPoint = NO;
        } else {
            [polygonPath addLineToLatLong:loc.coordinate];
        } 
    }

    [polygonPath closePath];

    polygonPath.zPosition = -2.0f;

    NSMutableArray *sublayers = [[[[mapView contents] overlay] sublayers] mutableCopy];
    [sublayers insertObject:polygonPath atIndex:0];
    [[[mapView contents] overlay] setSublayers:sublayers];
    return polygonPath;
}

注意：

最新的RouteMe有addLineToCoordinate:(CLLocationCoordinate2D)coordinate而不是addLineToLatLong。

这是在 Route-me 示例中的 MapTestBed 中找到的较新

- (RMMapLayer *)mapView:(RMMapView *)aMapView layerForAnnotation:(RMAnnotation *)annotation
{
    if ([annotation.annotationType isEqualToString:@"path"]) {
        RMPath *testPath = [[[RMPath alloc] initWithView:aMapView] autorelease];
        [testPath setLineColor:[annotation.userInfo objectForKey:@"lineColor"]];
        [testPath setFillColor:[annotation.userInfo objectForKey:@"fillColor"]];
        [testPath setLineWidth:[[annotation.userInfo objectForKey:@"lineWidth"] floatValue]];

        CGPathDrawingMode drawingMode = kCGPathStroke;
        if ([annotation.userInfo containsObject:@"pathDrawingMode"])
            drawingMode = [[annotation.userInfo objectForKey:@"pathDrawingMode"] intValue];
        [testPath setDrawingMode:drawingMode];

        if ([[annotation.userInfo objectForKey:@"closePath"] boolValue])
            [testPath closePath];

        for (CLLocation *location in [annotation.userInfo objectForKey:@"linePoints"])
        {
            [testPath addLineToCoordinate:location.coordinate];
        }

        return testPath;
    }
    if ([annotation.annotationType isEqualToString:@"marker"]) {
        return [[[RMMarker alloc] initWithUIImage:annotation.annotationIcon anchorPoint:annotation.anchorPoint] autorelease];
    }

    return nil;
}

【讨论】：

【解决方案4】：

抱歉，我没有见过这样的事情 - 我只想指出，如果人们因为他们认为您在谈论新的 SDK 映射功能而对您投反对票，请再次阅读您在谈论第三个问题的问题派对库（仍然可能是一个有效的需求，因为您无法使用官方地图 SDK 进行转弯指示）。

【讨论】：