我有 2 个注释要显示在 mapview 上,但无法将 maprect 设置为在屏幕上显示所有注释而不需要用户缩小。
我试过了,showAnnotations
但没有运气。任何人都能够在 Swift 和 Xcode 6.1.1 中做到这一点?
这是我的代码:
class ViewController: UIViewController, MKMapViewDelegate {
@IBOutlet var map: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
var mapView = map
// 1
let point1 = CLLocationCoordinate2D(latitude: 38.915565, longitude: -77.093524)
let point2 = CLLocationCoordinate2D(latitude: 38.890693, longitude: -76.933318)
//2
let annotation = MKPointAnnotation()
annotation.setCoordinate(point1)
annotation.title = "point1"
map.addAnnotation(annotation)
let annotation2 = MKPointAnnotation()
annotation2.setCoordinate(point2)
annotation2.title = "point2"
map.addAnnotation(annotation2)
//3
// option1: set maprect to cover all annotations, doesn't work
var points = [annotation, annotation2]
var rect = MKMapRectNull
for p in points {
let k = MKMapPointForCoordinate(p.coordinate)
rect = MKMapRectUnion(rect, MKMapRectMake(k.x, k.y, 0.1, 0.1))
println("result: x = \(rect.origin.x) y = \(rect.origin.y)")
}
map.setVisibleMapRect(rect, animated: true)
// option 2: using showAnnotations, doesn't work
//map.showAnnotations(points, animated: true)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
这是我目前得到的:
这是我期望看到的:
谢谢你的帮助。