回答編集履歴
1
任意の View を表示させる方法
answer
CHANGED
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@@ -73,4 +73,90 @@
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print(#function)
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}
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}
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```
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##任意の View を表示させる方法
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```Swift
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import UIKit
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import MapKit
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83
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// UIGestureRecognizerDelegate に準拠させる
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class ViewController: UIViewController, MKMapViewDelegate, UIGestureRecognizerDelegate {
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@IBOutlet weak var mapView: MKMapView!
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var annotationCoordinate = MKPointAnnotation()
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override func viewDidLoad() {
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90
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super.viewDidLoad()
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// Do any additional setup after loading the view.
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mapView.delegate = self
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// mapView に gestureRecognizer を追加する
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let gesture = UIPanGestureRecognizer(target: self, action: #selector(receiveGesture(_:)))
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gesture.delegate = self
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mapView.addGestureRecognizer(gesture)
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// 緯度・経度を設定
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let location = CLLocationCoordinate2DMake(35.68154,139.752498)
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mapView.setCenter(location, animated:true)
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// 初期のアノテーション
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annotationCoordinate.coordinate = location
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mapView.addAnnotation(annotationCoordinate)
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// 縮尺を設定
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var region = mapView.region
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region.center = location
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region.span.latitudeDelta = 0.02
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region.span.longitudeDelta = 0.02
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mapView.setRegion(region,animated:true)
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mapView.mapType = .standard
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// アニメーションを使うなら
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// 縦横20ピクセルの視覚を用意する
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let squareView = UIView(frame: .init(x: 0, y: 0, width: 20, height: 20))
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squareView.layer.borderWidth = 2
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squareView.layer.borderColor = UIColor.red.cgColor
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// 点滅処理
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UIView.animateKeyframes(withDuration: 0.5, delay: 0.0, options: [.autoreverse, .repeat]) {
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squareView.alpha = 0.0
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} completion: { _ in
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}
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// mapView の region.center として設定されている CGPoint を取得して、squareView の中心にする
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squareView.center = mapView.convert(mapView.region.center, toPointTo: mapView)
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mapView.addSubview(squareView)
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}
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// delegate: 複数の GestureRecognizer を有効にする
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func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
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return true
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}
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@objc func receiveGesture(_ gestureRecognizer : UIPanGestureRecognizer) {
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print(#function)
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if let mapView = gestureRecognizer.view as? MKMapView {
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moveAnnotation(mapView)
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}
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}
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func moveAnnotation(_ mapView: MKMapView) {
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// 地図の中央座標
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annotationCoordinate.coordinate = mapView.centerCoordinate
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}
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// delegate: ドラッグ終了
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func mapView(_ mapView: MKMapView, regionDidChangeAnimated animated: Bool) {
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print(#function)
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moveAnnotation(mapView)
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}
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// delegate: ドラッグ開始
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func mapView(_ mapView: MKMapView, regionWillChangeAnimated animated: Bool) {
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print(#function)
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}
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}
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```
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