Create map callout view UserAnnotationCalloutView.

2026-04-20 00:24:43 +02:00 · 2022-04-05 17:43:34 +02:00
parent 4f72fd3745
commit 2ca9669f7d
1 changed files with 156 additions and 0 deletions
@@ -0,0 +1,156 @@
+// 
+// Copyright 2022 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Mapbox
+
+class UserAnnotationCalloutView: UIView, MGLCalloutView, Themable {
+    
+    // MARK: - Constants
+    
+    private enum Constants {
+        static let animationDuration: TimeInterval = 0.2
+        static let bottomMargin: CGFloat = 3.0
+    }
+ 
+    // MARK: - Properties
+    
+    // MARK: Overrides
+    
+    var representedObject: MGLAnnotation
+    
+    lazy var leftAccessoryView: UIView = UIView()
+    
+    lazy var rightAccessoryView: UIView = UIView()
+    
+    var delegate: MGLCalloutViewDelegate?
+    
+    // Allow the callout to remain open during panning.
+    let dismissesAutomatically: Bool = false
+    
+    let isAnchoredToAnnotation: Bool = true
+    
+    // https://github.com/mapbox/mapbox-gl-native/issues/9228
+    override var center: CGPoint {
+        set {
+            var newCenter = newValue
+            newCenter.y -= bounds.maxY + Constants.bottomMargin
+            super.center = newCenter
+        }
+        get {
+            return super.center
+        }
+    }
+    
+    // MARK: Private
+    
+    lazy var contentView: UserAnnotationCalloutContentView = {
+        return UserAnnotationCalloutContentView.instantiate()
+    }()
+    
+    // MARK: - Setup
+    
+    required init(userLocationAnnotation: UserLocationAnnotation) {
+        
+        self.representedObject = userLocationAnnotation
+        
+        super.init(frame: .zero)
+                        
+        self.vc_addSubViewMatchingParent(self.contentView)
+        
+        self.update(theme: ThemeService.shared().theme)
+        
+        let size = UserAnnotationCalloutContentView.contentViewSize()
+
+        self.frame = CGRect(origin: .zero, size: size)
+    }
+    
+    required init?(coder decoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    // MARK: - Public
+    
+    func update(theme: Theme) {
+        self.contentView.update(theme: theme)
+    }
+    
+    // MARK: - Overrides
+
+    func presentCallout(from rect: CGRect, in view: UIView, constrainedTo constrainedRect: CGRect, animated: Bool) {
+        
+        // Set callout above the marker view
+        
+        self.center = view.center.applying(CGAffineTransform(translationX: 0, y: view.bounds.height/2 + self.bounds.height))
+        
+        delegate?.calloutViewWillAppear?(self)
+        
+        view.addSubview(self)
+        
+        if isCalloutTappable() {
+            // Handle taps and eventually try to send them to the delegate (usually the map view).
+            self.contentView.shareButton.addTarget(self, action: #selector(CustomCalloutView.calloutTapped), for: .touchUpInside)
+        } else {
+            // Disable tapping and highlighting.
+            self.contentView.shareButton.isUserInteractionEnabled = false
+        }
+        
+        if animated {
+            alpha = 0
+            
+            UIView.animate(withDuration: Constants.animationDuration) { [weak self] in
+                guard let strongSelf = self else {
+                    return
+                }
+                
+                strongSelf.alpha = 1
+                strongSelf.delegate?.calloutViewDidAppear?(strongSelf)
+            }
+        } else {
+            delegate?.calloutViewDidAppear?(self)
+        }
+    }
+    
+    func dismissCallout(animated: Bool) {
+        if (superview != nil) {
+            if animated {
+                UIView.animate(withDuration: Constants.animationDuration, animations: { [weak self] in
+                    self?.alpha = 0
+                }, completion: { [weak self] _ in
+                    self?.removeFromSuperview()
+                })
+            } else {
+                removeFromSuperview()
+            }
+        }
+    }
+
+    // MARK: - Callout interaction handlers
+
+    func isCalloutTappable() -> Bool {
+        if let delegate = delegate {
+            if delegate.responds(to: #selector(MGLCalloutViewDelegate.calloutViewShouldHighlight)) {
+                return delegate.calloutViewShouldHighlight!(self)
+            }
+        }
+        return false
+    }
+
+    @objc func calloutTapped() {
+        if isCalloutTappable() && delegate!.responds(to: #selector(MGLCalloutViewDelegate.calloutViewTapped)) {
+            delegate!.calloutViewTapped!(self)
+        }
+    }
+}