谷歌地图代表

Question

我在我的项目中使用谷歌地图。当点击调用委托方法的infoWindowOfMarker时，我想给用户两个选项：mapView(_ mapView: GMSMapView, didTapInfoWindowOfMarker marker: GMSMarker)

如果我只想执行一个操作，我可以检索标记中的信息，然后执行我的操作。实际上，我想给用户两个选项：See Detail(它将把用户发送到一个新的视图控制器(和Visit(它将根据标记的位置属性和用户的当前位置从google API获得方向(这两个选项将是两个按钮。

我不知道如何将标记参数传递给点击按钮时调用的方法。

查看代码，请让我知道我可以做这件事的任何其他方法。

class ItemMarker: GMSMarker {
let item: Item
init(item: Item){
self.item = item
super.init(position: item.coordinate)
//and necessary initialization
}}
class MapViewController: GMSMapViewDelegate{
@IBOutlet weak var actionStackView: UIStackView!
@IBoutlet weak var mapView: GMSMapView!
var currentUser: User!
var users = [User]()
var items = [Item]()
override viewDidLoad(){
super.viewDidLoad()
//implement code for mapView
self.currentUser = UserManager.shared.currentUser
self.users = UserManager.shared.users
users.forEach {self.items.append(contentOf: $0.items}
self.items.forEach {let marker = ItemMarker(item: $0)
marker.map = mapView}
}
@objc func seeDetailButtonTapped(_ sender: UIButton){
//here I want to verify if the user is the owner of the item he wants to see the detail,
//then allow him to modify it and present the new view controller modally.
//if the user is not the owner, then not allowing editing, and show the new view controller.
//i guess for that I need to be able to have the marker for that.
}
@objc func visitButtonTapped(_ sender: UIButton) {
//here I want to use the user current location,
//the item location, get the directions for the user,
//I need the ItemMarker to do that.
}
func mapView(_ mapView: GMSMapView, didtapInfoWindowOfMarker marker: GMSMarker)
{
let visitButton = UIButton(type: .roundedRect)
visitButton.setTitle(Utilities.visit, for: .normal)
visitButton.backgroundColor = UIColor.systemBlue
visitButton.addTarget(self, action: #selector(visitButtonTapped(_:)), for: .touchUpInside)
let seeDetail = UIButton(type: .roundedRect)
seeDetail.setTitle(Utilities.detail, for: .normal)
seeDetail.backgroundColor = UIColor.systemGray
seeDetail.addTarget(self, action: #selector(showDetailHouse(_:)), for: .touchUpInside)
actionStackView.addArrangedSubview(visitButton)
actionStackView.addArrangedSubview(seeDetail)
let stackViewHeight = actionStackView.intrinsicContentSize.height
let topInset = self.mapView.safeAreaInsets.top
mapView.padding = UIEdgeInsets(top: topInset, left: 0.0, bottom: stackViewHeight, right: 0.0)
UIView.animate(withDuration: 0.25) {
actionStackView.bottomAnchor.constraint(equalTo: self.mapView.safeAreaLayoutGuide.bottomAnchor, constant: 2.0).isActive = true
actionStackView.alpha = 0.9 }
}
}

如何将标记传递给seeDetail方法和visitButtonTapped方法？🤷

Answer 1

从UIButton创建一个具有所需属性的子类，然后可以在tap处理程序中使用它。

class UIButtonWithMarker: UIButton {
var itemMarker: ItemMarker?
}
func mapView(_ mapView: GMSMapView, didtapInfoWindowOfMarker marker: GMSMarker)
{
let visitButton = UIButtonWithMarker(type: .roundedRect)
visitButton.itemMarker = marker as? ItemMarker
visitButton.setTitle(Utilities.visit, for: .normal)
visitButton.backgroundColor = UIColor.systemBlue
visitButton.addTarget(self, action: #selector(visitButtonTapped(_:)), for: .touchUpInside)
let seeDetail = UIButtonWithMarker(type: .roundedRect)
seeDetail.itemMarker = marker as? ItemMarker
seeDetail.setTitle(Utilities.detail, for: .normal)
seeDetail.backgroundColor = UIColor.systemGray
seeDetail.addTarget(self, action: #selector(showDetailHouse(_:)), for: .touchUpInside)
}
@objc func seeDetailButtonTapped(_ sender: UIButtonWithMarker){
if itemMarker = sender.itemMarker {
//use itemMarker here
}
}
@objc func visitButtonTapped(_ sender: UIButtonWithMarker) {
if itemMarker = sender.itemMarker {
//use itemMarker here
}
}