96 lines
2.7 KiB
Swift
Executable File
96 lines
2.7 KiB
Swift
Executable File
/*
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* Copyright 2020 Google LLC. All rights reserved.
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*
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
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* file except in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under
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* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
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* ANY KIND, either express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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import GoogleMaps
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import UIKit
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class FrameRateViewController: UIViewController {
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private lazy var mapView: GMSMapView = {
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let camera = GMSCameraPosition(latitude: -33.868, longitude: 151.2086, zoom: 6)
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return GMSMapView(frame: .zero, camera: camera)
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}()
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private lazy var statusTextView: UITextView = UITextView()
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override func loadView() {
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view = mapView
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statusTextView.text = ""
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statusTextView.textAlignment = .center
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statusTextView.backgroundColor = UIColor(white: 1, alpha: 0.8)
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statusTextView.isEditable = false
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view.addSubview(statusTextView)
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statusTextView.sizeToFit()
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// Add a button toggling through modes.
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navigationItem.rightBarButtonItem = UIBarButtonItem(
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barButtonSystemItem: .play, target: self, action: #selector(changeFrameRate))
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updateStatus()
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statusTextView.translatesAutoresizingMaskIntoConstraints = false
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NSLayoutConstraint.activate([
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statusTextView.leftAnchor.constraint(equalTo: view.leftAnchor),
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statusTextView.rightAnchor.constraint(equalTo: view.rightAnchor),
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statusTextView.heightAnchor.constraint(greaterThanOrEqualToConstant: 24),
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])
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if #available(iOS 11, *) {
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NSLayoutConstraint.activate([
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statusTextView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor)
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])
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} else {
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NSLayoutConstraint.activate([
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statusTextView.topAnchor.constraint(equalTo: topLayoutGuide.topAnchor)
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])
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}
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}
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@objc func changeFrameRate() {
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mapView.preferredFrameRate = nextFrameRate()
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updateStatus()
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}
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func nextFrameRate() -> GMSFrameRate {
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switch mapView.preferredFrameRate {
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case .powerSave:
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return .conservative
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case .conservative:
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return .maximum
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default:
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return .powerSave
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}
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}
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func updateStatus() {
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statusTextView.text = "Preferred frame rate: \(mapView.preferredFrameRate.name)"
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}
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}
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extension GMSFrameRate {
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var name: String {
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switch self {
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case .powerSave:
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return "PowerSave"
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case .conservative:
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return "Conservative"
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default:
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return "Maximum"
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}
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}
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}
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