SWIFT 2:多行MKPointAnnotation

Question

有没有一种方法可以创建多行注释？

下面是我的代码：

1)我的customAnnotation类

import UIKit
import MapKit

class CustomAnnotation: NSObject, MKAnnotation {

    var title: String?
    var subtitle: String?
    var address: String = ""
    var phoneNumber: String = ""
    var workingHours: String = ""
    var coordinate: CLLocationCoordinate2D


    init(   title: String,
            subtitle: String,
            address: String,
            phoneNumber: String,
            workingHours: String,
            coordinate: CLLocationCoordinate2D ){

        self.title = title
        self.subtitle = subtitle
        self.address = address
        self.phoneNumber = phoneNumber
        self.workingHours = workingHours
        self.coordinate = coordinate

        super.init()
    }
}

2)我的带有map的视图控制器：

类MapViewController: UIViewController，MKMapViewDelegate {

@IBOutlet weak var theMapView: MKMapView!

override func viewDidLoad() {
    super.viewDidLoad()


            let latitude: CLLocationDegrees = 54.685290
            let longitude : CLLocationDegrees = 25.279661

            let latDelta : CLLocationDegrees = 0.2
            let lonDelta : CLLocationDegrees = 0.2

            let theSpan : MKCoordinateSpan = MKCoordinateSpanMake(latDelta, lonDelta)

            let branchLocation : CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)

            let theRegion : MKCoordinateRegion = MKCoordinateRegionMake(branchLocation, theSpan)


            let annotation = CustomAnnotation(title: "Brach1", subtitle: "some text for B1", address: "address str 12-12", phoneNumber: "123 321 123", workingHours: "00 - 24", coordinate: branchLocation)


            self.theMapView.setRegion(theRegion, animated: true)

            self.theMapView.addAnnotation(annotation)

        }


override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}


func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {

    let identifier = "MyPin"

    if annotation.isKindOfClass(MKUserLocation) {
        return nil
    }

    var annotationView: MKPinAnnotationView? = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier) as? MKPinAnnotationView

    if annotationView == nil {

        annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
        annotationView?.canShowCallout = true

        let multiLineView = UIView(frame: CGRectMake(0, 0, 100, 40))

        let label1 = UILabel(frame: CGRectMake(0,0,100,20))
        label1.text = "Some text1"
        multiLineView.addSubview(label1)

        let label2 = UILabel(frame: CGRectMake(0,20,100,20))
        label2.text = "some text2"
        multiLineView.addSubview(label2)

        annotationView!.rightCalloutAccessoryView = multiLineView

    } else {
        annotationView!.annotation = annotation
    }
return annotationView
}

}

我得到的是：

​

​

如果我要使用

annotationView!.leftCalloutAccessoryView = multiLineView

我会得到：

​

​

我没有找到任何其他的方法。我希望像bottomCalouttAccessoryView这样的东西会得到这样的结果：

​

​

对于我来说，注释的高度是不可修改的，这对我来说是非常有意义的。(这就是为什么我的三个标签甚至不适合那里)我试图尝试自动调整注解视图的大小方法，但没有成功：(

Answer 1

副标题是打印到单行标签的字符串，您可能必须创建一个子类才能添加多行。

Answer 2

你看过吗：How to display 2 lines of text for subtitle of MKAnnotation and change the image for the button on the right?

尤其是这部分(我帮你把它转换成了Swift )

   var multiLineView= UIView(frame: CGRectMake(0, 0, 23, 23))
    multiLineView.addSubview(lable1)
    multiLineView.addSubview(lable2)
    annotationView.leftCalloutAccessoryView = multiLineView

更新

func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView! {

var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier("pin")

if pinView == nil {
    pinView = MKAnnotationView(annotation: annotation, reuseIdentifier: "pin")
    pinView!.canShowCallout = true

    // create a new View
    var multiLineView= UIView(frame: CGRectMake(0, 0, 23, 23))
    // add all the labels you need here
    let label1 = UILabel(frame: CGRectMake(0,10,10,10))
    label1.text = "Some text"
    multiLineView.addSubview(label1)
    let label2 = UILabel(frame: CGRectMake(0,20,10,10))
    label2.text = "some text"
    multiLineView.addSubview(label2)
    pinView!.leftCalloutAccessoryView = multiLineView


}
else {
    pinView!.annotation = annotation
}

return pinView

}

Answer 3

请使用我以编程方式设置的NSLayoutConstraint。

 func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {

        let identifier = "MyPin"

        if annotation.isKindOfClass(MKUserLocation) {
            return nil
        }

        var annotationView: MKPinAnnotationView? = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier) as? MKPinAnnotationView

        if annotationView == nil {

            annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
            annotationView?.canShowCallout = true

              let label1 = UILabel(frame: CGRectMake(0, 0, 200, 21))
            label1.text = "Some text1 some text2 some text2 some text2 some text2 some text2 some text2"
             label1.numberOfLines = 0
              annotationView!.detailCalloutAccessoryView = label1;

            let width = NSLayoutConstraint(item: label1, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.LessThanOrEqual, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 200)
            label1.addConstraint(width)


            let height = NSLayoutConstraint(item: label1, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 90)
            label1.addConstraint(height)



        } else {
            annotationView!.annotation = annotation
        }
        return annotationView
    }


}

和输出

​