init project

ios/Classes/OverlayController/AMapPolygonController.m

@@ -0,0 +1,99 @@
+//
+//  AMapPolygonController.m
+//  amap_map
+//
+//  Created by lly on 2020/11/12.
+//
+
+#import "AMapPolygonController.h"
+#import "AMapPolygon.h"
+#import "AMapJsonUtils.h"
+#import "MAPolygon+Flutter.h"
+#import "MAPolygonRenderer+Flutter.h"
+#import "FlutterMethodChannel+MethodCallDispatch.h"
+
+@interface AMapPolygonController ()
+
+@property (nonatomic,strong) NSMutableDictionary<NSString*,AMapPolygon*> *polygonDict;
+@property (nonatomic,strong) FlutterMethodChannel *methodChannel;
+@property (nonatomic,strong) NSObject<FlutterPluginRegistrar> *registrar;
+@property (nonatomic,strong) MAMapView *mapView;
+
+@end
+
+
+@implementation AMapPolygonController
+
+- (instancetype)init:(FlutterMethodChannel*)methodChannel
+             mapView:(MAMapView*)mapView
+           registrar:(NSObject<FlutterPluginRegistrar>*)registrar {
+    self = [super init];
+    if (self) {
+        _methodChannel = methodChannel;
+        _mapView = mapView;
+        _polygonDict = [NSMutableDictionary dictionaryWithCapacity:1];
+        _registrar = registrar;
+        
+        __weak typeof(self) weakSelf = self;
+        [_methodChannel addMethodName:@"polygons#update" withHandler:^(FlutterMethodCall * _Nonnull call, FlutterResult  _Nonnull result) {
+            id polygonsToAdd = call.arguments[@"polygonsToAdd"];
+            if ([polygonsToAdd isKindOfClass:[NSArray class]]) {
+                [weakSelf addPolygons:polygonsToAdd];
+            }
+            id polygonsToChange = call.arguments[@"polygonsToChange"];
+            if ([polygonsToChange isKindOfClass:[NSArray class]]) {
+                [weakSelf changePolygons:polygonsToChange];
+            }
+            id polygonIdsToRemove = call.arguments[@"polygonIdsToRemove"];
+            if ([polygonIdsToRemove isKindOfClass:[NSArray class]]) {
+                [weakSelf removePolygonIds:polygonIdsToRemove];
+            }
+            result(nil);
+        }];
+    }
+    return self;
+}
+
+- (nullable AMapPolygon *)polygonForId:(NSString *)polygonId {
+    return _polygonDict[polygonId];
+}
+
+- (void)addPolygons:(NSArray*)polygonsToAdd {
+    for (NSDictionary* polygonDict in polygonsToAdd) {
+        AMapPolygon *polygon = [AMapJsonUtils modelFromDict:polygonDict modelClass:[AMapPolygon class]];
+        // 先加入到字段中，避免后续的地图回到里，取不到对应的overlay数据
+        if (polygon.id_) {
+            _polygonDict[polygon.id_] = polygon;
+        }
+        [self.mapView addOverlay:polygon.polygon];
+    }
+}
+
+- (void)changePolygons:(NSArray*)polygonsToChange {
+    for (NSDictionary* polygonDict in polygonsToChange) {
+        AMapPolygon *polygon = [AMapJsonUtils modelFromDict:polygonDict modelClass:[AMapPolygon class]];
+        AMapPolygon *currentPolygon = _polygonDict[polygon.id_];
+        NSAssert(currentPolygon != nil, @"需要修改的Polygon不存在");
+        [currentPolygon updatePolygon:polygon];
+        MAOverlayRenderer *render = [self.mapView rendererForOverlay:currentPolygon.polygon];
+        if (render && [render isKindOfClass:[MAPolygonRenderer class]]) { // render没有复用，只要添加过，就一定可以获取到
+            [(MAPolygonRenderer *)render updateRenderWithPolygon:currentPolygon];
+        }
+    }
+}
+
+- (void)removePolygonIds:(NSArray*)polygonIdsToRemove {
+    for (NSString* polygonId in polygonIdsToRemove) {
+        if (!polygonId) {
+            continue;
+        }
+        AMapPolygon* polygon = _polygonDict[polygonId];
+        if (!polygon) {
+            continue;
+        }
+        [self.mapView removeOverlay:polygon.polygon];
+        [_polygonDict removeObjectForKey:polygonId];
+    }
+}
+
+@end