在viewDidLayoutSubviews()中调用map view函数时,map view会显示两次?

我正在视图中显示地图。我使用的是自动布局,这就是为什么我在viewdidLayoutSubviews()中调用create map view函数的原因。viewDidLayoutSubviews()调用了两次,并创建了两次映射,但未从视图中删除初始映射。当我在viewdidload()中调用create map view函数时,它只创建了一次,不适合视图框架。

我的代码是…。

override func viewDidLayoutSubviews()。{
super.viewdidlayoutSubviews()。
打印(“ViewDidLayoutSubviews”)

loadmapview()//调用map view函数

让width=mapSubview.frame.size.width
设x=mapsubview.frame.minx
设y=mapSubView.frame.miny

searchbar.frame=cgrect(x:x+10,y:y+10,width:width,height:40)
mapsubview.addsubview(搜索栏)
searchbar.delegate=本人
//隐藏取消按钮
searchbar.showscancelbutton=真
//设置默认条形图状态。
searchbar.searchbarstyle=uisearchbarstyle.default

设y1=searchbar.frame.maxy
searchTableView.frame=cDirect(x:x,y:y1,width:width,height:searchTableView.frame.size.height)
mapSubview.addSubview(搜索表视图)

searchTableView.delegate=自己
searchTableView.datasource=自身


}







override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    print("viewDidLayoutSubviews")

    loadMapView()//Call map view function

    let width = mapSubView.frame.size.width
    let x = mapSubView.frame.minX
    let y = mapSubView.frame.minY

    searchBar.frame = CGRect(x: x+10, y: y+10, width: width, height: 40)
    mapSubView.addSubview(searchBar)
    searchBar.delegate = self
    // hide cancel button
    searchBar.showsCancelButton = true
    // set Default bar status.
    searchBar.searchBarStyle = UISearchBarStyle.default

    let y1 = searchBar.frame.maxY
    searchTableView.frame = CGRect(x: x, y: y1, width: width, height: searchTableView.frame.size.height)
    mapSubView.addSubview(searchTableView)

    searchTableView.delegate = self
    searchTableView.dataSource = self


}

//Create map view
func loadMapView() {
    // Create a GMSCameraPosition that tells the map to display the
    // coordinate -33.86,151.20 at zoom level 6.
    let camera = GMSCameraPosition.camera(withLatitude: 19.3822559, longitude: 80.2194394, zoom: 6.0)
    let mapView = GMSMapView.map(withFrame: CGRect(x: 1, y: 1, width: mapSubView.frame.size.width-2, height: mapSubView.frame.size.height-2), camera: camera)
    mapSubView.addSubview(mapView)
     print("map : \(mapSubView.frame.size.height)")
    print("map : \(mapView)")
    // Creates a marker in the center of the map.
    let marker = GMSMarker()
    marker.position = CLLocationCoordinate2D(latitude: 19.3822559, longitude: 80.2194394)
    marker.title = ""
    marker.snippet = ""

    marker.map = mapView
}