swift 百度地图Api定位不准确问题

    // 1.OC的经纬度画线代码
    CLLocationCoordinate2D coords[5] = {0};
    coords[0] = CLLocationCoordinate2DMake(31.174805, 121.408186);
    coords[1] = CLLocationCoordinate2DMake(31.172792, 121.408577);
    coords[2] = CLLocationCoordinate2DMake(31.172575, 121.408623);
    coords[3] = CLLocationCoordinate2DMake(31.171408, 121.407910);
    coords[4] = CLLocationCoordinate2DMake(31.170963, 121.405790);
    BMKPolyline *polyline = [BMKPolyline polylineWithCoordinates:coords count:5];
    [_mapView addOverlay:polyline];
    [_mapView setCenterCoordinate:coords[0]];
    
    // 2. swift经纬度画线代码
    var coords = [CLLocationCoordinate2D]()
    coords.append(CLLocationCoordinate2D(latitude: 31.174805 , longitude: 121.408186))
    coords.append(CLLocationCoordinate2D(latitude: 31.172792, longitude: 121.408577))
    coords.append(CLLocationCoordinate2D(latitude: 31.172575, longitude: 121.408623))
    coords.append(CLLocationCoordinate2D(latitude: 31.171408, longitude: 121.407910))
    coords.append(CLLocationCoordinate2D(latitude: 31.170963, longitude: 121.405790))
    let polyline = BMKPolyline(coordinates: &coords, count: UInt(coords.count))
    self.mapView.add(polyline)
    self.mapView.setCenter(coords[0], animated: true)
    
    // 3. 显示鲜果对比
    ![[email protected]](https://upload-images.jianshu.io/upload_images/1434489-d6636dbb1065afb2.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

    
    // 4. 解决方法
    将swift的纬度减0.006, 经度减去0.0065
    var coords = [CLLocationCoordinate2D]()
    coords.append(CLLocationCoordinate2D(latitude: 31.174805 - 0.006, longitude: 121.408186 - 0.0065))
    coords.append(CLLocationCoordinate2D(latitude: 31.172792 - 0.006, longitude: 121.408577 - 0.0065))
    coords.append(CLLocationCoordinate2D(latitude: 31.172575 - 0.006, longitude: 121.408623 - 0.0065))
    coords.append(CLLocationCoordinate2D(latitude: 31.171408 - 0.006, longitude: 121.407910 - 0.0065))
    coords.append(CLLocationCoordinate2D(latitude: 31.170963 - 0.006, longitude: 121.405790 - 0.0065))