騰訊地圖獲取全國行政區劃檢索列表Demo

時間 2020-09-19

原文原文鏈接

前言

全國行政區劃檢索功能, 因爲高德和百度也沒有提供一個比較完美的解決方案, 所以使用了騰訊地圖iOS SDK內部封裝的Web接口來實現. 行政區劃共分爲三個等級, 省級/市級/區級, 對於北京市和天津市這樣的城市, 一般直接認爲是省級, 並直接以一樣的內容來填充市級. 可是SDK內部並無提供這樣的填充, 所以須要自行再省級裏面將其複製到市級。git

使用場景

給用戶提供選擇行政區域和居住地等功能的行政區劃選擇器。數組

準備

騰訊地圖3D SDKide

行政區劃檢索ui

核心代碼

- (void)searchWithDistrictSearchOption:(QMSDistrictBaseSearchOption *)districtSearchOption didRecevieResult:(QMSDistrictSearchResult *)districtSearchResult {
    
    _provinceModelArray = [NSMutableArray array];
    
    NSArray *provinceArray = districtSearchResult.result[0];
    NSArray *cityArray = districtSearchResult.result[1];
    NSArray *districtArray = districtSearchResult.result[2];
    
    for (QMSDistrictData *provinceData in provinceArray) {
        ProvinceModel *provinceModel = [ProvinceModel provinceWithDistrictData:provinceData];
        
        // 取出市級
        NSMutableArray *cityModelArray = [NSMutableArray array];
        NSArray<NSNumber *> *cidx = provinceData.cidx;
        QMSDistrictData *cityData = cityArray[cidx.firstObject.intValue];
        
        // 判斷二級結構後面是否還有三級結構
        // 若是沒有, 則直接使用一級結構做爲二級結構, 二級結構做爲三級結構, 如: 北京-北京-東城區
        if (cityData.cidx == nil) {
            CityModel *cityModel = [CityModel cityWithDistrictData:provinceData];
            [cityModelArray addObject:cityModel];
            
            // 設置三級結構
            NSMutableArray *districtModelArray = [NSMutableArray array];
            int firstIndex = provinceData.cidx.firstObject.intValue;
            int lastIndex = provinceData.cidx.lastObject.intValue;
            
            // 將二級結構設置爲三級結構
            for (int i = firstIndex; i < lastIndex + 1; i++) {
                QMSDistrictData *districData = cityArray[i];
                DistrictModel *districtModel = [DistrictModel districtWithDistrictData:districData];
                [districtModelArray addObject:districtModel];
            }
            
            cityModel.districts = districtModelArray;
            provinceModel.cities = cityModelArray;
        } else {
            // 填充二級結構
            int cityFirstIndex = provinceData.cidx.firstObject.intValue;
            int cityLastIndex = provinceData.cidx.lastObject.intValue;
            
            for (int i = cityFirstIndex; i < cityLastIndex + 1; i++) {
                QMSDistrictData *cityData = cityArray[i];
                CityModel *cityModel = [CityModel cityWithDistrictData:cityData];
                [cityModelArray addObject:cityModel];
                
                // 設置三級結構
                int districtFirstIndex = cityData.cidx.firstObject.intValue;
                int districtLastIndex = cityData.cidx.lastObject.intValue;
                NSMutableArray *districtModelArray = [NSMutableArray array];
                
                for (int i = districtFirstIndex; i < districtLastIndex + 1; i++) {
                    QMSDistrictData *districtData = districtArray[i];
                    DistrictModel *districtModel = [DistrictModel districtWithDistrictData:districtData];
                    [districtModelArray addObject:districtModel];
                }
                
                cityModel.districts = districtModelArray;
            }
            
            provinceModel.cities = cityModelArray;
        }
        
        [_provinceModelArray addObject:provinceModel];
    }
    
    _selectProvinceModel = _provinceModelArray[0];
    _selectCityModel = _selectProvinceModel.cities[0];
    _selectDistrictModel = _selectCityModel.districts[0];
    
    [self setupPickerView];
}

以上就是核心代碼，因爲須要解析返回的行政區劃的內容, 而且數據共有省市區三個數組, 對於北京市這樣的特殊例子並無第三個數組, 所以須要額外的步驟區拆分, 直接看部分代碼可能有一些晦澀, 所以建議同窗們能夠直接下載Demo嘗試。spa