我想要显示我地图上的所有标记,在进行一些搜索后我发现应该使用 GMSCoordinateBounds (Google Maps SDK)我已经阅读了有关它的官方文档,但我不明白如何使用它并在我的代码中实现它。
这是我的代码
GMSCoordinateBounds *bounds = [[GMSCoordinateBounds alloc] init];
CLLocationCoordinate2D location;
for (NSDictionary *dictionary in array) {
location.latitude = [dictionary[@"latitude"] floatValue];
location.longitude = [dictionary[@"longitude"] floatValue];
// Creates a marker in the center of the map.
GMSMarker *marker = [[GMSMarker alloc] init];
marker.icon = [UIImage imageNamed:(@"marker.png")];
marker.position = CLLocationCoordinate2DMake(location.latitude, location.longitude);
bounds = [bounds includingCoordinate:marker.position];
marker.title = dictionary[@"type"];
marker.map = mapView_;
}
[mapView_ animateWithCameraUpdate:[GMSCameraUpdate fitBounds:bounds withPadding:30.0f]];
有任何帮助吗?
答案 0 :(得分:56)
- (void)focusMapToShowAllMarkers
{
GMSCoordinateBounds *bounds = [[GMSCoordinateBounds alloc] init];
for (GMSMarker *marker in <An array of your markers>)
bounds = [bounds includingCoordinate:marker.position];
[<yourMap> animateWithCameraUpdate:[GMSCameraUpdate fitBounds:bounds withPadding:30.0f]];
}
<强>更新强>
你确定你的标记数组和坐标没有错吗? 我已经尝试过这段代码并且工作正常。我把它放在viewDidAppear
上NSMutableArray *array = [[NSMutableArray alloc]initWithObjects:[[NSDictionary alloc]initWithObjectsAndKeys:@"44.66",@"latitude",@"21.33",@"longitude", nil],
[[NSDictionary alloc]initWithObjectsAndKeys:@"44.66",@"latitude",@"21.453",@"longitude", nil],
[[NSDictionary alloc]initWithObjectsAndKeys:@"44.44",@"latitude",@"21.993",@"longitude", nil],
[[NSDictionary alloc]initWithObjectsAndKeys:@"44.635",@"latitude",@"21.553",@"longitude", nil],
[[NSDictionary alloc]initWithObjectsAndKeys:@"44.3546",@"latitude",@"21.663",@"longitude", nil],
[[NSDictionary alloc]initWithObjectsAndKeys:@"44.6643",@"latitude",@"21.212",@"longitude", nil],
[[NSDictionary alloc]initWithObjectsAndKeys:@"44.63466",@"latitude",@"21.3523",@"longitude", nil],nil];
GMSCoordinateBounds *bounds = [[GMSCoordinateBounds alloc] init];
CLLocationCoordinate2D location;
for (NSDictionary *dictionary in array)
{
location.latitude = [dictionary[@"latitude"] floatValue];
location.longitude = [dictionary[@"longitude"] floatValue];
// Creates a marker in the center of the map.
GMSMarker *marker = [[GMSMarker alloc] init];
marker.icon = [UIImage imageNamed:(@"marker.png")];
marker.position = CLLocationCoordinate2DMake(location.latitude, location.longitude);
bounds = [bounds includingCoordinate:marker.position];
marker.title = dictionary[@"type"];
marker.map = mapView_;
}
[mapView_ animateWithCameraUpdate:[GMSCameraUpdate fitBounds:bounds withPadding:30.0f]];
这是我的结果:
答案 1 :(得分:35)
Swift 3 - Xcode 8
var bounds = GMSCoordinateBounds()
for marker in yourArrayOfMarkers
{
bounds = bounds.includingCoordinate(marker.position)
}
let update = GMSCameraUpdate.fit(bounds, withPadding: 60)
mapView.animate(with: update)
答案 2 :(得分:16)
使用GMSCoordinateBounds()
无路径的快速解决方案
var bounds = GMSCoordinateBounds()
for location in locationArray
{
let latitude = location.valueForKey("latitude")
let longitude = location.valueForKey("longitude")
let marker = GMSMarker()
marker.position = CLLocationCoordinate2D(latitude:latitude, longitude:longitude)
marker.map = self.mapView
bounds = bounds.includingCoordinate(marker.position)
}
let update = GMSCameraUpdate.fitBounds(bounds, withPadding: 100)
mapView.animateWithCameraUpdate(update)
答案 3 :(得分:16)
清理 swift 3 版本:
let bounds = markers.reduce(GMSCoordinateBounds()) {
$0.includingCoordinate($1.position)
}
mapView.animate(with: .fit(bounds, withPadding: 30.0))
答案 4 :(得分:7)
@IBOutlet weak var mapView: GMSMapView!
let camera = GMSCameraPosition.cameraWithLatitude(23.0793, longitude:
72.4957, zoom: 5)
mapView.camera = camera
mapView.delegate = self
mapView.myLocationEnabled = true
*** arry has dictionary object which has value of Latitude and Longitude. ***
let path = GMSMutablePath()
for i in 0..<arry.count {
let dict = arry[i] as! [String:AnyObject]
let latTemp = dict["latitude"] as! Double
let longTemp = dict["longitude"] as! Double
let marker = GMSMarker()
marker.position = CLLocationCoordinate2D(latitude: latTemp, longitude: longTemp)
marker.title = "Austrilia"
marker.appearAnimation = kGMSMarkerAnimationNone
marker.map = self.mapView
path.addCoordinate(CLLocationCoordinate2DMake(latTemp, longTemp))
}
let bounds = GMSCoordinateBounds(path: path)
self.mapView!.animateWithCameraUpdate(GMSCameraUpdate.fitBounds(bounds, withPadding: 50.0))
答案 5 :(得分:7)
我找到的最简单的方法是创建一个GMSMutablePath,然后将标记的所有坐标添加到它。然后,您可以使用GMSCoordinateBounds初始化程序initWithPath:来创建边界。
获得边界后,您可以创建GMSCameraUpdate并使用它将地图设置为包含所有标记的可见边界。
例如,如果你有一个GMSMarker的数组:
NSArray *myMarkers; // array of marker which sets in Mapview
GMSMutablePath *path = [GMSMutablePath path];
for (GMSMarker *marker in myMarkers) {
[path addCoordinate: marker.position];
}
GMSCoordinateBounds *bounds = [[GMSCoordinateBounds alloc] initWithPath:path];
[_mapView animateWithCameraUpdate:[GMSCameraUpdate fitBounds:bounds]];
答案 6 :(得分:6)
对于Google Maps版本2.0.0,如果您尝试使用默认构造函数GMSCoordinateBounds()创建GMSCoordinateBounds,并检查&#34;有效&#34;标志它将返回false并且它不会使animateWithCameraUpdate:move。
Swift 2.3解决方案
if let myLocation = mapView.myLocation {
let path = GMSMutablePath()
path.addCoordinate(myLocation.coordinate)
//add other coordinates
//path.addCoordinate(model.coordinate)
let bounds = GMSCoordinateBounds(path: path)
mapView.animateWithCameraUpdate(GMSCameraUpdate.fitBounds(bounds, withPadding: 40))
}
答案 7 :(得分:2)
我们可以在每个地方找到相同的代码,但请确保它位于 viewDidAppear()方法
//bounding to a region of markers
GMSCoordinateBounds *bounds =
[[GMSCoordinateBounds alloc] initWithCoordinate:sourceMarker.position coordinate:destMarker.position];
[_mapView moveCamera:[GMSCameraUpdate fitBounds:bounds withPadding:50.0]];
答案 8 :(得分:1)
您可以迭代地图标记并进一步指向东,西,北和南并制作[[GMSCoordinateBounds alloc] initWithRegion:]
答案 9 :(得分:0)
根据documentation,不能更改GMSCoordinateBounds 。
GMSCoordinateBounds是不可变的,构造后无法修改。
- (GMSCoordinateBounds *)includingCoordinate:(CLLocationCoordinate2D)coordinate;
- (GMSCoordinateBounds *)includingBounds:(GMSCoordinateBounds *)other;
因此,我们可以使用上述方法(包括坐标:(用于扩展坐标)和包括边界:(用于扩展边界)来对GMSCoordinateBounds进行突变。
因此Swift代码如下所示:
var gmsBounds = GMSCoordinateBounds()
for coordinate in coordinates {
let marker = GMSMarker(position: coordinate)
gmsBounds = gmsBounds.includingCoordinate(position)
marker.map = mapView
}
mapView.animate(with: GMSCameraUpdate.fit(gmsBounds, withPadding: 30.0))
附加说明:
如果添加自定义标记视图,则除了必需的填充之外,还添加填充作为标记视图的宽度。