离线地图
为了节约流量，可以将某省市的离线地图下载到手机SD卡中，在没有网络连接的情况下也能自由使用地图服务。【Navinfo Navigation SDK for iOS】产品提供了数据商店功能，初始化数据商店代码如下：
在controller中导入数据商店头文件
#import <iNaviCore/MBDatastoreItem.h>
#import <iNaviCore/MBDataUpdateTask.h>
初始化
_dataStore = [[MBDatastore alloc] init];
_dataStore.delegate = self;
[_dataStore setNeedsRefresh];
实现代理方法
获得数据源
- (void) datastoreRefreshed:(MBDatastore *)ds {
NSArray *dataStoreItems = ds.root.subnodes;
NSMutableArray *provinceItems = [NSMutableArray arrayWithCapacity:dataStoreItems.count];
NSMutableArray *cityItems = [NSMutableArray array];
NSMutableArray *cityDataStoreItems = [NSMutableArray array];
for (MBDatastoreItem*provinceItem in dataStoreItems) {
CTMLObj *provinceNode = [CTMLObj nodeWithOwnID:provinceItem.itemId name:provinceItem.name level:1];
[provinceItems addObject:provinceNode];
if (provinceItem.subnodes.count) {
for (MBDatastoreItem* cityItem in provinceItem.subnodes) {
MLNodelObj *cityNode = [MLNodelObj nodeWithParentID:provinceItem.itemId ownID:cityItem.itemId name:cityItem.name level:2 isleaf:YES isroot:NO isExpand:NO];
[cityItems addObject:cityNode];
[cityDataStoreItems addObject:cityItem];
}
} else {
[cityDataStoreItems addObject:provinceItems];
}
provinceNode.subNodes = cityItems;
}
}
其他代理回调
// 开始下载
(void)datastoreDownloadingDataItemBegan:(MBDatastore *)ds itemId:(NSString *)itemId;
// 下载中进度回调
(void)datastoreDownloadingDataItemProgressUpdated:(MBDatastore *)ds itemId:(NSString *)itemId withPercent:(CGFloat)percent;
// 下载完成
(void)datastoreDownloadingDataItemCompleted:(MBDatastore *)ds itemId:(NSString *)itemId;
// 下载失败
- (void)datastoreDownloadingDataItemFailed:(MBDatastore *) ds itemId:(NSString *)itemId withErrCode:(MBDatastoreErrCode)code;
// 开始安装
(void)datastoreInstallDataItemBegan:(MBDatastore *)ds itemId:(NSString *)itemId;
// 安装中进度更新回调
(void)datastoreInstallDataItemProgressUpdated:(MBDatastore *) ds itemId:(NSString *)itemId withPercent:(CGFloat)percent;
// 安装完成
(void)datastoreInstallDataItemFinished:(MBDatastore *)ds itemId:(NSString *)itemId;
// 安装失败
- (void)datastoreInstallDataItemFailed:(MBDatastore *)ds itemId:(NSString *)itemId withErrCode:(MBDatastoreErrCode)code;
// 数据状态改变
- (void)dataItemStateChanged:(MBDatastore *)ds itemId:(NSString *)itemId;
具体实现请参照SDKDemo中MBDataStoreController。