Offline Map
In order to save traffic, offline maps of a certain province and city can be downloaded to the SD card of the mobile phone, and the map service can be freely used without a network connection. [Navinfo Navigation SDK for iOS] The product provides data store functionality, and the initial data store code is as follows:
Import the data store header file in the controller
#import <iNaviCore/MBDatastoreItem.h>
#import <iNaviCore/MBDataUpdateTask.h>
Initialize
_dataStore = [[MBDatastore alloc] init];
_dataStore.delegate = self;
[_dataStore setNeedsRefresh];
Achieve proxy method
Get the data source
- (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;
}
}
Other agent callbacks
// start download
(void)datastoreDownloadingDataItemBegan:(MBDatastore *)ds itemId:(NSString *)itemId;
// Download progress callback
(void)datastoreDownloadingDataItemProgressUpdated:(MBDatastore *)ds itemId:(NSString *)itemId withPercent:(CGFloat)percent;
// Download completed
(void)datastoreDownloadingDataItemCompleted:(MBDatastore *)ds itemId:(NSString *)itemId;
// download failed
- (void)datastoreDownloadingDataItemFailed:(MBDatastore *) ds itemId:(NSString *)itemId withErrCode:(MBDatastoreErrCode)code;
// start installation
(void)datastoreInstallDataItemBegan:(MBDatastore *)ds itemId:(NSString *)itemId;
// Installation progress update callback
(void)datastoreInstallDataItemProgressUpdated:(MBDatastore *) ds itemId:(NSString *)itemId withPercent:(CGFloat)percent;
// The installation is complete
(void)datastoreInstallDataItemFinished:(MBDatastore *)ds itemId:(NSString *)itemId;
// installation failed
- (void)datastoreInstallDataItemFailed:(MBDatastore *)ds itemId:(NSString *)itemId withErrCode:(MBDatastoreErrCode)code;
// Data state change
- (void)dataItemStateChanged:(MBDatastore *)ds itemId:(NSString *)itemId;
For specific implementation, please refer to MBDataStoreController in SDKDemo.