实现 ios 热力图接口

components/maps/HeatMap.js

@@ -2,6 +2,9 @@ import React, {PropTypes, PureComponent} from 'react'
 import {PixelRatio, Platform, requireNativeComponent, ViewPropTypes} from 'react-native'
 import {LatLng} from '../PropTypes'
 
+/**
+ * 注意，热力图组件的 props 设置过一次之后便不能再更改
+ */
 export default class HeatMap extends PureComponent {
   static propTypes = {
     ...ViewPropTypes,

ios/AMapHeatMap.h

+#import <MAMapKit/MAMapKit.h>
+#import "AMapModel.h"
+
+#pragma ide diagnostic ignored "OCUnusedPropertyInspection"
+
+@interface AMapHeatMap : AMapModel
+@end

ios/AMapHeatMap.m

+#import "AMapHeatMap.h"
+#import "Coordinate.h"
+
+#pragma ide diagnostic ignored "OCUnusedMethodInspection"
+
+@implementation AMapHeatMap {
+    NSArray<MAHeatMapNode *> *_data;
+    MATileOverlayRenderer *_renderer;
+    MAHeatMapTileOverlay *_heatMap;
+    NSInteger _radius;
+    CGFloat _opacity;
+}
+
+- (void)setCoordinates:(NSArray<MAHeatMapNode *> *)coordinates {
+    _data = coordinates;
+}
+
+- (void)setRadius:(NSInteger)radius {
+    _radius = radius;
+}
+
+- (void)setOpacity:(CGFloat)opacity {
+    _opacity = opacity;
+}
+
+- (MAOverlayRenderer *)renderer {
+    if (_renderer == nil) {
+        if (_opacity == 0) {
+            _opacity = 0.6;
+        }
+        if (_radius == 0) {
+            _radius = 12;
+        }
+        _heatMap = [MAHeatMapTileOverlay new];
+        _heatMap.data = _data;
+        _heatMap.opacity = _opacity;
+        _heatMap.radius = _radius;
+        _renderer = [[MATileOverlayRenderer alloc] initWithTileOverlay:_heatMap];
+    }
+    return _renderer;
+}
+
+@end

ios/AMapHeatMapManager.m

+#import <MAMapKit/MAMapView.h>
+#import <React/RCTViewManager.h>
+#import "AMapHeatMap.h"
+
+#pragma ide diagnostic ignored "OCUnusedClassInspection"
+
+@interface AMapHeatMapManager : RCTViewManager
+@end
+
+@implementation AMapHeatMapManager {
+}
+
+RCT_EXPORT_MODULE()
+
+- (UIView *)view {
+    return [AMapHeatMap new];
+}
+
+RCT_EXPORT_VIEW_PROPERTY(coordinates, MAHeatMapNodeArray)
+RCT_EXPORT_VIEW_PROPERTY(radius, NSInteger)
+RCT_EXPORT_VIEW_PROPERTY(opacity, CGFloat)
+
+@end

ios/RCTConvert+AMapView.m

@@ -24,6 +24,13 @@ RCT_ENUM_CONVERTER(MAPinAnnotationColor, (@{
     return [[Coordinate alloc] initWithCoordinate:[self CLLocationCoordinate2D:json]];
 }
 
++ (MAHeatMapNode *)MAHeatMapNode:(id)json {
+    MAHeatMapNode *node = [MAHeatMapNode new];
+    node.coordinate = [self CLLocationCoordinate2D:json];
+    node.intensity = 1;
+    return node;
+}
+
 + (MACoordinateRegion)MACoordinateRegion:(id)json {
     return MACoordinateRegionMake(
             [self CLLocationCoordinate2D:json],
@@ -39,6 +46,7 @@ RCT_ENUM_CONVERTER(MAPinAnnotationColor, (@{
 }
 
 RCT_ARRAY_CONVERTER(Coordinate)
+RCT_ARRAY_CONVERTER(MAHeatMapNode)
 RCT_ARRAY_CONVERTER(AMapNaviPoint)
 
 @end