标签：res nsnumber hand esc 注意 代码 显示 不显示 失败
网络地图服务（WMS）利用具有地理空间位置信息的数据制作地图。其中将地图定义为地理数据可视的表现。能够根据用户的请求返回相应的地图（包括PNG，GIF，JPEG等栅格形式或者是SVG和WEB CGM等矢量形式）。WMS支持网络协议HTTP，所支持的操作是由URL定义的。
先来分析一波服务链接：
一般情况给我们的是这样的：http://... .../geoserver/xf/wms?service=WMS&version=1.1.0&request=GetMap&layers=zgwz_lzyz_f08&styles=&bbox=-1844.9489742784644,0.0,35699.99999999942,34437.74999999997&width=768&height=704&srs=EPSG:3857&format=application/openlayers
参数：
通过高德地图 MATileOverlay 接口，添加 WMS 服务到地图上
import UIKit class WMSTileOverlay: MATileOverlay { var rootURL = "" var titleSize = 0 var initialResolution = 0.0 var originShift = 0.0 var HALF_PI = 0.0 var RAD_PER_DEGREE = 0.0 var HALF_RAD_PER_DEGREE = 0.0 var METER_PER_DEGREE = 0.0 var DEGREE_PER_METER = 0.0 /// 初始化 /// - Parameter initRootURL: 在线地图路径&TRANSPARENT=TRUE&FORMAT=image/png&BBOX= init?(rootURL initRootURL: String?) { super.init() rootURL = initRootURL ?? "" titleSize = 256 initialResolution = 156543.03392804062////2*Math.PI*6378137/titleSize originShift = 20037508.342789244//周长的一半 2*Math.PI*6378137/2.0 HALF_PI = .pi / 2.0 RAD_PER_DEGREE = .pi/180.0 HALF_RAD_PER_DEGREE = .pi/360.0 METER_PER_DEGREE = originShift/180.0//一度多少米 DEGREE_PER_METER = 180.0/originShift//一米多少度 } /** * @brief 以tile path生成URL。用于加载tile,此方法默认填充URLTemplate * @param path tile path * @return 以tile path生成tileOverlay */ override func url(forTilePath path: MATileOverlayPath) -> URL { let strURL = "\(rootURL)\(titleBoundsBy(x: path.x, y: path.y, zoom: path.z) ?? "")" let url = URL(string: strURL) return url! } /** * @brief 加载被请求的tile,并以tile数据或加载tile失败error访问回调block;默认实现为首先用URLForTilePath去获取URL,然后用异步NSURLConnection加载tile * @param path tile path * @param result 用来传入tile数据或加载tile失败的error访问的回调block */ override func loadTile(at path: MATileOverlayPath, result: @escaping(Data?, Error?) -> Void) { let url = self.url(forTilePath: path) let request = NSMutableURLRequest(url: url) request.httpMethod = "GET" let session = URLSession.shared session.dataTask(with: request as URLRequest, completionHandler: {(data, response, error) in if error != nil { #if DEBUG print("Error downloading tile") #endif result(nil, error) } else { result(data, nil) } }).resume() } /// 取消请求瓦片，当地图显示区域发生变化时，会取消显示区域外的瓦片的下载, 当disableOffScreenTileLoading=YES时会被调用。since 5.3.0 /// - Parameter path: path override func cancelLoadOfTile(at path: MATileOverlayPath) { super.cancelLoadOfTile(at: path) } /** * 根据瓦片的x/y等级返回瓦片范围 * * @param tx * @param ty * @param zoom * @return url */ func titleBoundsBy(x: Int, y: Int, zoom: Int) -> String? { let minX = pixels2Meters(x * titleSize, zoom: zoom) let maxY = -pixels2Meters(y * titleSize, zoom: zoom) let maxX = pixels2Meters(((x + 1) * titleSize), zoom: zoom) let minY = -pixels2Meters(((y + 1) * titleSize), zoom: zoom) return "\(minX),\(minY),\(maxX),\(maxY)" } /** * 根据像素、等级算出坐标 * * @param p p * @param zoom z * @return double */ func pixels2Meters(_ p: Int, zoom: Int) -> Double { return Double(p) * resolution(zoom) - originShift } /** * 计算分辨率 * * @param zoom z * @return double */ func resolution(_ zoom: Int) -> Double { return initialResolution / (pow(2.0, Double(zoom))) } }
import UIKit class MapController: UIViewController { let tileOverlay = WMSTileOverlay.init(rootURL: "http://... .../geoserver/haitu/wms?SERVICE=WMS&VERSION=1.1.0&REQUEST=GetMap&LAYERS=haitu:gis_t_landuse_a&TRANSPARENT=TRUE&STYLES=&srs=EPSG:3857&FORMAT=image/png&BBOX=") override func viewDidLoad() { super.viewDidLoad() let map = MAMapView(frame: frame: view.bounds) mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight] mapView.setCenter(CLLocationCoordinate2D(latitude: 39.97000000, longitude: 116.3300000), zoomLevel: 20, animated: false) tileOverlay?.disableOffScreenTileLoading = true//停止不在显示区域的瓦片下载 mapView.add(tileOverlay) view.addSubview(mapView) } }
（1）WMS服务地图没有坐标：会导致图层不能显示在正确的位置，这时候图层会显示在地图的（0，0）坐标位置（非洲），排查的方法就是将地图中心设置在（0，0）坐标，然后放大。解决办法就是制图工程师给你个带坐标的图。
（2）图层叠加了很多次：第一出现这种情况有可能是我们自己对图层做的缓存引起的。可以删除缓存试试。
（3）出现栅格：这种情况有可能发布的图有问题，或者bbox参数计算出现了问题。出现这种情况的原因很多，欢迎补充。
（4）坐标系不同、WMS版本1.1和1.3：如果WMS服务给的是84坐标系，叠加到高德上会出现偏移，可以让制图工程师出一个高德坐标系的图，也可以我们自己在代码里做，会有一点计算量，代码如下：
在第1步自定义类WMSTileOverlay中的方法func titleBoundsBy(x: Int, y: Int, zoom: Int) -> String?更改
/** * 根据瓦片的x/y等级返回瓦片范围 * * @param tx * @param ty * @param zoom * @return url */ func titleBoundsBy(x: Int, y: Int, zoom: Int) -> String? { let minX = pixels2Meters(x * titleSize, zoom: zoom) let maxY = -pixels2Meters(y * titleSize, zoom: zoom) let maxX = pixels2Meters(((x + 1) * titleSize), zoom: zoom) let minY = -pixels2Meters(((y + 1) * titleSize), zoom: zoom) return "\(minX),\(minY),\(maxX),\(maxY)" }
改为
/** * 根据瓦片的x/y等级返回瓦片范围 * * @param tx * @param ty * @param zoom * @return url */ func titleBoundsBy(x: Int, y: Int, zoom: Int) -> String? { var minX = pixels2Meters(x * titleSize, zoom: zoom) var maxY = -pixels2Meters(y * titleSize, zoom: zoom) var maxX = pixels2Meters(((x + 1) * titleSize), zoom: zoom) var minY = -pixels2Meters(((y + 1) * titleSize), zoom: zoom) //转换成经纬度 minX = meters2Lon(minX) minY = meters2Lat(minY) maxX = meters2Lon(maxX) maxY = meters2Lat(maxY) //转换目标经纬度为高德坐标系。 let amapcoord = AMapCoordinateConvert(CLLocationCoordinate2DMake(CLLocationDegrees(minY), CLLocationDegrees(minX)), type) minY = amapcoord.latitude minX = amapcoord.longitude let maxAmapcoord = AMapCoordinateConvert(CLLocationCoordinate2DMake(CLLocationDegrees(maxY), CLLocationDegrees(maxX)), type) maxY = maxAmapcoord.latitude maxX = maxAmapcoord.longitude //转换成墨卡托 minX = lon2Meters(minX) minY = lat2Meters(minY) maxX = lon2Meters(maxX) maxY = lat2Meters(maxY) //有博客提到1.1版本和1.3版本有区别，没有尝试过，如果你遇到了欢迎补充 result = "\(minX),\(minY),\(maxX),\(maxY)" //1.1 //result = "\(minX),\(minY),\(maxX),\(maxY)"//1.3 return result } //////添加坐标转换相应的方法 /** * X米转经纬度 */ func meters2Lon(_ mx: Double) -> Double { let lon = mx * DEGREE_PER_METER return lon } /** * Y米转经纬度 */ func meters2Lat(_ my: Double) -> Double { var lat = my * DEGREE_PER_METER lat = 180.0 / .pi * (2 * atan(exp(lat * RAD_PER_DEGREE)) - HALF_PI) return lat } /** * X经纬度转米 */ func lon2Meters(_ lon: Double) -> Double { let mx = lon * METER_PER_DEGREE return mx } /** * Y经纬度转米 */ func lat2Meters(_ lat: Double) -> Double { var my = log(tan((90 + lat) * HALF_RAD_PER_DEGREE))/(RAD_PER_DEGREE) my = my * METER_PER_DEGREE return my }
建议：做室内地图的用Mapbox，因为Mapbox缩放级别可以达到1米的效果。
import UIKit import Mapbox class ViewController: UIViewController, MGLMapViewDelegate { var mapView: MGLMapView! var rasterLayer: MGLRasterStyleLayer? override func viewDidLoad() { super.viewDidLoad() mapView = MGLMapView(frame: view.bounds) mapView.autoresizingMask = [.flexibleWidth, .flexibleHeight] mapView.setCenter(CLLocationCoordinate2D(latitude: 39.97000000, longitude: 116.3300000), zoomLevel: 20, animated: false) mapView.delegate = self view.addSubview(mapView) // Add a UISlider that will control the raster layer’s opacity. addSlider() } func mapView(_ mapView: MGLMapView, didFinishLoading style: MGLStyle) { // Add a new raster source and layer. let source = MGLRasterTileSource(identifier: "stamen-watercolor", tileURLTemplates: ["http://.../geoserver/xf/wms?service=WMS&version=1.1.0&request=GetMap&layers=zgwz_lzyz_f08_3857&styles=&bbox={bbox-epsg-3857}&width=768&height=704&srs=EPSG:3857&format=image/png"], options: [ .tileSize: 256 ]) let rasterLayer = MGLRasterStyleLayer(identifier: "stamen-watercolor", source: source) style.addSource(source) style.addLayer(rasterLayer) self.rasterLayer = rasterLayer } @objc func updateLayerOpacity(_ sender: UISlider) { rasterLayer?.rasterOpacity = NSExpression(forConstantValue: sender.value as NSNumber) } func addSlider() { let padding: CGFloat = 10 let slider = UISlider(frame: CGRect(x: padding, y: self.view.frame.size.height - 44 - 30, width: self.view.frame.size.width - padding * 2, height: 44)) slider.minimumValue = 0 slider.maximumValue = 1 slider.value = 1 slider.isContinuous = false slider.addTarget(self, action: #selector(updateLayerOpacity), for: .valueChanged) view.insertSubview(slider, aboveSubview: mapView) if #available(iOS 11.0, *) { let safeArea = view.safeAreaLayoutGuide slider.translatesAutoresizingMaskIntoConstraints = false let constraints = [ slider.bottomAnchor.constraint(equalTo: safeArea.bottomAnchor, constant: -mapView.logoView.bounds.height - 10), slider.widthAnchor.constraint(equalToConstant: self.view.frame.size.width - padding * 2), slider.centerXAnchor.constraint(equalTo: safeArea.centerXAnchor) ] NSLayoutConstraint.activate(constraints) } else { slider.autoresizingMask = [.flexibleTopMargin, .flexibleLeftMargin, .flexibleRightMargin] } } }
标签：res nsnumber hand esc 注意 代码 显示 不显示 失败
原文地址：https://www.cnblogs.com/zongqingmeng/p/12931009.html
