AMapPolylineController.m
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//
// AMapPolylineController.m
// amap_flutter_map
//
// Created by lly on 2020/11/6.
//
#import "AMapPolylineController.h"
#import "AMapPolyline.h"
#import "AMapJsonUtils.h"
#import "AMapMarker.h"
#import "MAPolyline+Flutter.h"
#import "MAPolylineRenderer+Flutter.h"
#import "AMapConvertUtil.h"
#import "FlutterMethodChannel+MethodCallDispatch.h"
@interface AMapPolylineController ()
// 存储所有 polyline 的字典，key 为 polylineId
@property (nonatomic,strong) NSMutableDictionary<NSString*,AMapPolyline*> *polylineDict;
// Flutter 方法通道
@property (nonatomic,strong) FlutterMethodChannel *methodChannel;
// Flutter 插件注册器
@property (nonatomic,strong) NSObject<FlutterPluginRegistrar> *registrar;
// 地图视图
@property (nonatomic,strong) MAMapView *mapView;
@end
@implementation AMapPolylineController
// 构造方法，初始化通道、地图和注册器，并注册 Flutter 侧 polyline 更新的回调
- (instancetype)init:(FlutterMethodChannel*)methodChannel
mapView:(MAMapView*)mapView
registrar:(NSObject<FlutterPluginRegistrar>*)registrar {
self = [super init];
if (self) {
_methodChannel = methodChannel;
_mapView = mapView;
_polylineDict = [NSMutableDictionary dictionaryWithCapacity:1];
_registrar = registrar;
__weak typeof(self) weakSelf = self;
// 注册 Flutter 侧 polylines#update 方法的回调
[_methodChannel addMethodName:@"polylines#update" withHandler:^(FlutterMethodCall * _Nonnull call, FlutterResult _Nonnull result) {
id polylinesToAdd = call.arguments[@"polylinesToAdd"];
if ([polylinesToAdd isKindOfClass:[NSArray class]]) {
[weakSelf addPolylines:polylinesToAdd];
}
id polylinesToChange = call.arguments[@"polylinesToChange"];
if ([polylinesToChange isKindOfClass:[NSArray class]]) {
[weakSelf changePolylines:polylinesToChange];
}
id polylineIdsToRemove = call.arguments[@"polylineIdsToRemove"];
if ([polylineIdsToRemove isKindOfClass:[NSArray class]]) {
[weakSelf removePolylineIds:polylineIdsToRemove];
}
result(nil);
}];
}
return self;
}
// 根据 polylineId 获取 polyline 对象
- (nullable AMapPolyline *)polylineForId:(NSString *)polylineId {
return _polylineDict[polylineId];
}
// 添加一组 polyline 到地图
- (void)addPolylines:(NSArray*)polylinesToAdd {
for (NSDictionary* polyline in polylinesToAdd) {
AMapPolyline *polylineModel = [AMapJsonUtils modelFromDict:polyline modelClass:[AMapPolyline class]];
// 如果有自定义纹理图片，解析图片
if (polylineModel.customTexture) {
polylineModel.strokeImage = [AMapConvertUtil imageFromRegistrar:self.registrar iconData:polylineModel.customTexture];
}
// 先加入到字段中，避免后续的地图回调里，取不到对应的overlay数据
if (polylineModel.id_) {
_polylineDict[polylineModel.id_] = polylineModel;
}
[self.mapView addOverlay:polylineModel.polyline];
}
}
// 修改一组 polyline 的属性
- (void)changePolylines:(NSArray*)polylinesToChange {
for (NSDictionary* polylineToChange in polylinesToChange) {
AMapPolyline *polyline = [AMapJsonUtils modelFromDict:polylineToChange modelClass:[AMapPolyline class]];
AMapPolyline *currentPolyline = _polylineDict[polyline.id_];
NSAssert(currentPolyline != nil, @"需要修改的Polyline不存在");
// 如果图片纹理变了，则存储和解析新的图标
if ([AMapConvertUtil checkIconDescriptionChangedFrom:currentPolyline.customTexture to:polyline.customTexture]) {
currentPolyline.strokeImage = [AMapConvertUtil imageFromRegistrar:self.registrar iconData:polyline.customTexture];
currentPolyline.customTexture = polyline.customTexture;
}
// 更新除了图标之外的其它信息
[currentPolyline updatePolyline:polyline];
MAOverlayRenderer *render = [self.mapView rendererForOverlay:currentPolyline.polyline];
if (render && [render isKindOfClass:[MAPolylineRenderer class]]) { // render没有复用，只要添加过，就一定可以获取到
[(MAPolylineRenderer *)render updateRenderWithPolyline:currentPolyline];
}
}
}
// 移除一组 polyline
- (void)removePolylineIds:(NSArray*)polylineIdsToRemove {
for (NSString* polylineId in polylineIdsToRemove) {
if (!polylineId) {
continue;
}
AMapPolyline* polyline = _polylineDict[polylineId];
if (!polyline) {
continue;
}
[self.mapView removeOverlay:polyline.polyline];
[_polylineDict removeObjectForKey:polylineId];
}
}
//MARK: Polyline的回调
// 处理 polyline 点击事件
- (BOOL)onPolylineTap:(NSString*)polylineId {
if (!polylineId) {
return NO;
}
AMapPolyline* polyline = _polylineDict[polylineId];
if (!polyline) {
return NO;
}
[_methodChannel invokeMethod:@"polyline#onTap" arguments:@{@"polylineId" : polylineId}];
return YES;
}
@end