iOS拖动地图选择地点

项目中写了一个关于拖动地图选择位置的功能，日常记录一下 使用的是高德地图，这里只使用到了定位、地图和搜索的SDK，直接上代码了

变量和懒加载

//定位
@property (nonatomic, strong) AMapLocationManager *locationManager;
//地图
@property (nonatomic, strong) MAMapView *mapView;
//大头针
@property (nonatomic, strong) MAPointAnnotation *annotation;
//逆地理编码
@property (nonatomic, strong) AMapReGeocodeSearchRequest *regeo;
//逆地理编码使用的
@property (nonatomic, strong) AMapSearchAPI *search;

- (AMapLocationManager *)locationManager {
    if (!_locationManager) {
        _locationManager = [[AMapLocationManager alloc]init];
        [_locationManager setDesiredAccuracy:kCLLocationAccuracyHundredMeters];
        _locationManager.locationTimeout = 2;
        _locationManager.reGeocodeTimeout = 2;
    }
    return _locationManager;
}

- (AMapReGeocodeSearchRequest *)regeo {
    if (!_regeo) {
        _regeo = [[AMapReGeocodeSearchRequest alloc]init];
        _regeo.requireExtension = YES;
    }
    return _regeo;
}

- (AMapSearchAPI *)search {
    if (!_search) {
        _search = [[AMapSearchAPI alloc]init];
        _search.delegate = self;
    }
    return _search;
}

添加地图背景

//在viewDidLoad里面添加背景和定位功能
//地图
    _mapView = [[MAMapView alloc]initWithFrame:CGRectMake(0, 0, KSCREEN_WIDTH, KSCREEN_HEIGHT)];
    [self.view addSubview:_mapView];
    _mapView.showsUserLocation = YES;
    _mapView.delegate = self;
    _mapView.userTrackingMode = MAUserTrackingModeFollow;
    _mapView.showsScale = NO;

//定位
[self.locationManager requestLocationWithReGeocode:YES completionBlock:^(CLLocation *location, AMapLocationReGeocode *regeocode, NSError *error) {
        
        if (error) {
            return ;
        }
        //添加大头针
        _annotation = [[MAPointAnnotation alloc]init];
        
        _annotation.coordinate = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude);
        [_mapView addAnnotation:_annotation];
        [_mapView setCenterCoordinate:CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude) animated:YES];
        //让地图在缩放过程中移到当前位置试图
        [_mapView setZoomLevel:16.1 animated:YES];
        
    }];

自定义大头针代理

- (MAAnnotationView *)mapView:(MAMapView *)mapView viewForAnnotation:(id)annotation {
    
    if ([annotation isKindOfClass:[MAPointAnnotation class]]) {
        static NSString *reuseIdetifier = @"annotationReuseIndetifier";
        MAAnnotationView *annotationView = (MAAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:reuseIdetifier];
        if (annotationView == nil) {
            annotationView = [[MAAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:reuseIdetifier];
        }
        //放一张大头针图片即可
        annotationView.image = [UIImage imageNamed:@"dingwei"];
        annotationView.centerOffset = CGPointMake(0, -18);
        return annotationView;
    }
    
    return nil;
}

地图开始移动和移动结束代理

#pragma mark - 让大头针不跟着地图滑动，时时显示在地图最中间
- (void)mapViewRegionChanged:(MAMapView *)mapView {
    _annotation.coordinate = mapView.centerCoordinate;
}
#pragma mark - 滑动地图结束修改当前位置
- (void)mapView:(MAMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
    self.regeo.location = [AMapGeoPoint locationWithLatitude:mapView.centerCoordinate.latitude longitude:mapView.centerCoordinate.longitude];
    [self.search AMapReGoecodeSearch:self.regeo];
}

滑动结束调用search的代理进行逆地理编码得到地理位置

- (void)onReGeocodeSearchDone:(AMapReGeocodeSearchRequest *)request response:(AMapReGeocodeSearchResponse *)response {
    if (response.regeocode != nil) {
        AMapReGeocode *reocode = response.regeocode;
        //地图标注的点的位置信息全在reoceode里面了
    }
}

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