将位置信息从 uibutton 传递到地图视图页面并开始导航

Question

enter image description here

    
    var location: [Location] = [
    
    Location(title: "LaFarge Hall", cllocation: CLLocation(latitude: 39.992853, longitude: -75.239888), regionRadius: 300.0, location: "Cardinal Ave", type: "Dorm Hall", coordinate: CLLocationCoordinate2DMake( 39.992853, -75.239888))
    ]
    
    @IBAction func tapDidNavi(sender: UIButton){
        
        
    }
    

我有一个按钮列表，这些按钮是用户可以选择的下车地点。当用户单击按钮时，按钮将移动到地图视图页面并绘制从当前位置到他们选择的位置的 google polyliner 路径。放置位置按钮位于包含位置坐标的数组中，我想传递位置坐标并启动一个地图视图，该视图绘制从当前位置到坐标的路径。

Answer 1

我建议在这里尝试使用 UITableView 而不是按钮列表。但是，如果您需要使用按钮列表，这应该可以：

只需创建一个 UIButton 的子类并将位置属性添加到它的初始化程序。

class LocationButton: UIButton {

public var location : Location

init(location: Location, frame: CGRect) {

    self.location = location

    super.init(frame: frame)

    setProperties()
}

///needed for interface builder 
required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

private func setProperties() {
    //Set properties of button here...
    setTitle("Button Title", for: .normal)
   }
}

创建一个“LocationButton”将如下所示：

let locationButton = LocationButton(location: Location(title: "LaFarge Hall", location: CLLocation(), frame: CGRect())

确保还为数组中的每个按钮添加一个目标：

locationButton.addTarget(self, action: #selector(tapDidNavi(_:)), for: .touchUpInside)

更新您的 tapDidNavi() 函数以接受 LocationButton 类型。然后，您将能够从按下的任何按钮中获取位置并将其传递给下一个 viewController，如下所示：

@IBAction func tapDidNavi(sender: LocationButton) {
    let nextViewController = SomeViewController() //This viewController must have a 'public var Location' inside of it.
    nextViewController.location = sender.location //The location object you set on the button

    self.navigationController?.pushViewController(nextViewController, animated: true)
}