Ios 基于mapkit覆盖的UIImage动画
我正试图在美国地图上制作一系列雷达图像的动画。我有一份从NOAA网站下载的雷达gif图像列表 如何在mapkit覆盖上实现一系列图像的动画? 我在这里看到了这些帖子: 和Ios 基于mapkit覆盖的UIImage动画,ios,overlay,mapkit,Ios,Overlay,Mapkit,我正试图在美国地图上制作一系列雷达图像的动画。我有一份从NOAA网站下载的雷达gif图像列表 如何在mapkit覆盖上实现一系列图像的动画? 我在这里看到了这些帖子: 和 但是找不到解决方案。以下是iOS7的最佳解决方案mkoverlayrender使向MKMapkit添加动画变得非常困难。按照此示例进行操作。我通过在视图控制器中创建计时器解决了此问题。每次计时器启动时,它都会调用自定义mkoverlayrender的setNeedsDisplay方法。在renderer子类drawMapRe
但是找不到解决方案。以下是iOS7的最佳解决方案
mkoverlayrender
使向MKMapkit
添加动画变得非常困难。按照此示例进行操作。我通过在视图控制器中创建计时器解决了此问题。每次计时器启动时,它都会调用自定义mkoverlayrender的setNeedsDisplay方法。在renderer子类drawMapRect方法中,我有以下代码来更新覆盖上的图像:
-(void)drawMapRect:(MKMapRect)mapRect zoomScale:(MKZoomScale)zoomScale inContext:(CGContextRef)context{
if (!weatherDataStore) //This is the store where I have my radar images
weatherDataStore = [WeatherDataStore sharedInstance];
UIImage *image = [weatherDataStore currentRadarImage];
if (!image || ![image isKindOfClass:[UIImage class]]) {
return;
}
CGImageRef imageReference = image.CGImage;
CGContextSetAlpha(context, 0.8);
MKMapRect theMapRect = [self.overlay boundingMapRect];
CGRect theRect = [self rectForMapRect:theMapRect];
CGContextScaleCTM(context, 1.0, -1.0);
CGContextTranslateCTM(context, 0.0, -theRect.size.height);
CGContextDrawImage(context, theRect, imageReference);
}
SWIFT
通过子类化MKOverlay和mkoverlarenderer将图像添加为覆盖
MapOverlay.swift
import UIKit
import MapKit
class MapOverlay: NSObject, MKOverlay {
var coordinate: CLLocationCoordinate2D
var boundingMapRect: MKMapRect
init(coord: CLLocationCoordinate2D, rect: MKMapRect) {
self.coordinate = coord
self.boundingMapRect = rect
}
}
import UIKit
import MapKit
class MapOverlayView: MKOverlayRenderer {
var overlayImage: UIImage
init(overlay: MKOverlay, overlayImage:UIImage) {
self.overlayImage = overlayImage
super.init(overlay: overlay)
}
override func draw(_ mapRect: MKMapRect, zoomScale: MKZoomScale, in context: CGContext) {
let mapImage = overlayImage.cgImage
let mapRect = rect(for: overlay.boundingMapRect)
context.scaleBy(x: 1.0, y: -1.0)
context.translateBy(x: 0.0, y: -mapRect.size.height)
context.draw(mapImage!, in: mapRect)
}
}
import UIKit
import MapKit
class ViewController: UIViewController {
@IBOutlet weak var mapview: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
mapview.delegate = self
let location = CLLocationCoordinate2D(latitude: 47.6062, longitude: -122.3320)
let span = MKCoordinateSpanMake(2.0, 2.0)
let region = MKCoordinateRegion(center: location, span: span)
mapview.setRegion(region, animated: true)
let rec = should be same as your image size
let overlay = MapOverlay(coord: location, rect: rec)
mapview.add(overlay)
}
}
extension ViewController: MKMapViewDelegate {
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
if overlay is MapOverlay {
let logo = UIImage(named: "swift")
let overlayView = MapOverlayView(overlay: overlay, overlayImage: logo)
return overlayView
} else {
return MKPolylineRenderer()
}
}
}
MapOverlayView.swift
import UIKit
import MapKit
class MapOverlay: NSObject, MKOverlay {
var coordinate: CLLocationCoordinate2D
var boundingMapRect: MKMapRect
init(coord: CLLocationCoordinate2D, rect: MKMapRect) {
self.coordinate = coord
self.boundingMapRect = rect
}
}
import UIKit
import MapKit
class MapOverlayView: MKOverlayRenderer {
var overlayImage: UIImage
init(overlay: MKOverlay, overlayImage:UIImage) {
self.overlayImage = overlayImage
super.init(overlay: overlay)
}
override func draw(_ mapRect: MKMapRect, zoomScale: MKZoomScale, in context: CGContext) {
let mapImage = overlayImage.cgImage
let mapRect = rect(for: overlay.boundingMapRect)
context.scaleBy(x: 1.0, y: -1.0)
context.translateBy(x: 0.0, y: -mapRect.size.height)
context.draw(mapImage!, in: mapRect)
}
}
import UIKit
import MapKit
class ViewController: UIViewController {
@IBOutlet weak var mapview: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
mapview.delegate = self
let location = CLLocationCoordinate2D(latitude: 47.6062, longitude: -122.3320)
let span = MKCoordinateSpanMake(2.0, 2.0)
let region = MKCoordinateRegion(center: location, span: span)
mapview.setRegion(region, animated: true)
let rec = should be same as your image size
let overlay = MapOverlay(coord: location, rect: rec)
mapview.add(overlay)
}
}
extension ViewController: MKMapViewDelegate {
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
if overlay is MapOverlay {
let logo = UIImage(named: "swift")
let overlayView = MapOverlayView(overlay: overlay, overlayImage: logo)
return overlayView
} else {
return MKPolylineRenderer()
}
}
}
ViewController.swift
import UIKit
import MapKit
class MapOverlay: NSObject, MKOverlay {
var coordinate: CLLocationCoordinate2D
var boundingMapRect: MKMapRect
init(coord: CLLocationCoordinate2D, rect: MKMapRect) {
self.coordinate = coord
self.boundingMapRect = rect
}
}
import UIKit
import MapKit
class MapOverlayView: MKOverlayRenderer {
var overlayImage: UIImage
init(overlay: MKOverlay, overlayImage:UIImage) {
self.overlayImage = overlayImage
super.init(overlay: overlay)
}
override func draw(_ mapRect: MKMapRect, zoomScale: MKZoomScale, in context: CGContext) {
let mapImage = overlayImage.cgImage
let mapRect = rect(for: overlay.boundingMapRect)
context.scaleBy(x: 1.0, y: -1.0)
context.translateBy(x: 0.0, y: -mapRect.size.height)
context.draw(mapImage!, in: mapRect)
}
}
import UIKit
import MapKit
class ViewController: UIViewController {
@IBOutlet weak var mapview: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
mapview.delegate = self
let location = CLLocationCoordinate2D(latitude: 47.6062, longitude: -122.3320)
let span = MKCoordinateSpanMake(2.0, 2.0)
let region = MKCoordinateRegion(center: location, span: span)
mapview.setRegion(region, animated: true)
let rec = should be same as your image size
let overlay = MapOverlay(coord: location, rect: rec)
mapview.add(overlay)
}
}
extension ViewController: MKMapViewDelegate {
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
if overlay is MapOverlay {
let logo = UIImage(named: "swift")
let overlayView = MapOverlayView(overlay: overlay, overlayImage: logo)
return overlayView
} else {
return MKPolylineRenderer()
}
}
}
在此调用之后,将调用一个函数来切换mkoverlayrender的alpha值
该项目在github中提供: