如果蓝牙和位置服务已开启,我可以成功扫描信标。但我想知道当蓝牙处于开启模式且位置服务处于关闭模式时,有没有办法扫描信标。
我已经使用过这段代码,但是当位置服务关闭时,不会调用此委托方法
-(void)locationManager:(CLLocationManager *)manager didRangeBeacons:(NSArray *)beacons inRegion:(CLBeaconRegion *)region
有人可以详细说明如何在没有位置服务的情况下扫描信标吗?
提前致谢。
答案 0 :(得分:1)
不,我认为您无法在关闭位置服务的情况下使用系统iBeacon支持。 iBeacon支持由Core Location框架提供。
您可以编写低级别的BLE代码来查找来自iBeacons的消息,但我看过那些无法弄清楚如何做的人的帖子。此外,您将失去Core Location提供的优势,例如即使在检测到信标时您的应用未运行,也会收到有关信标的通知。
答案 1 :(得分:1)
启用蓝牙但位置关闭,您只能使用CoreBluetooth
API检测蓝牙LE信标设备,而不能使用CoreLocation
API。
这有效地阻止您检测iBeacon传输,因为iOS会通过CoreBluetooth
阻止其检测。请在此处查看我的博文:http://developer.radiusnetworks.com/2013/10/21/corebluetooth-doesnt-let-you-see-ibeacons.html
但是,您可以使用CoreBluetooth
来检测其他信标格式,例如AltBeacon和Eddystone。我有开源代码,展示了如何使用iOS beacon tools。
使用上述工具,以下是扫描AltBeacon,Eddystone-UID,Eddystone-URL和Eddystone-EID并记录检测到的标识符的示例:
self.beaconParsers = [[NSMutableArray alloc] init];
RNLBeaconParser *altBeaconParser = [[RNLBeaconParser alloc] init];
[altBeaconParser setBeaconLayout:@"m:2-3=beac,i:4-19,i:20-21,i:22-23,p:24-24,d:25-25" error: Nil ];
RNLBeaconParser *uidBeaconParser = [[RNLBeaconParser alloc] init];
[uidBeaconParser setBeaconLayout:@"s:0-1=feaa,m:2-2=00,p:3-3:-41,i:4-13,i:14-19" error: Nil];
RNLBeaconParser *urlBeaconParser = [[RNLBeaconParser alloc] init];
[urlBeaconParser setBeaconLayout:@"s:0-1=feaa,m:2-2=10,p:3-3:-41,i:4-20v" error: Nil];
RNLBeaconParser *eidBeaconParser = [[RNLBeaconParser alloc] init];
[eidBeaconParser setBeaconLayout:@"s:0-1=feaa,m:2-2=30,p:3-3:-41,i:4-11" error: Nil];
self.beaconParsers = @[ altBeaconParser, uidBeaconParser, urlBeaconParser, eidBeaconParser ];
self.cbManager = [[CBCentralManager alloc] initWithDelegate:self queue:dispatch_get_main_queue()
options:@{ CBCentralManagerOptionRestoreIdentifierKey:
@"myCentralManagerIdentifier" }];
...
- (void)centralManagerDidUpdateState:(CBCentralManager *)central {
if (central.state == CBCentralManagerStatePoweredOn && self.scanning) {
CBUUID *eddystone16BitUUID = [CBUUID UUIDWithString:@"FEAA"];
NSLog(@"eddy uuid is %@", [eddystone16BitUUID UUIDString]);
[self.cbManager scanForPeripheralsWithServices:@[eddystone16BitUUID] options:@{CBCentralManagerScanOptionAllowDuplicatesKey : @(YES)}];
// this scans for BLE peripherals including beacons
[self.cbManager scanForPeripheralsWithServices:nil options:@{CBCentralManagerScanOptionAllowDuplicatesKey : @(YES)}];
}
else {
if (central.state == CBCentralManagerStateUnknown) {
NSLog(@"CoreBluetooth state UNKNOWN");
}
else if (central.state == CBCentralManagerStateResetting) {
NSLog(@"CoreBluetooth state RESETTING");
}
else if (central.state == CBCentralManagerStateUnsupported) {
NSLog(@"CoreBluetooth state UNSUPPORTED");
}
else if (central.state == CBCentralManagerStateUnauthorized) {
NSLog(@"CoreBluetooth state UNAUTHORIZED");
}
else if (central.state == CBCentralManagerStatePoweredOff) {
NSLog(@"CoreBluetooth state POWERED OFF");
}
}
}
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI {
NSDictionary *serviceData = advertisementData[@"kCBAdvDataServiceData"];
RNLBeacon *beacon = Nil;
NSData *adData = advertisementData[@"kCBAdvDataManufacturerData"];
for (RNLBeaconParser *beaconParser in self.beaconParsers) {
if (adData) {
beacon = [beaconParser fromScanData: adData withRssi: RSSI forDevice: peripheral serviceUuid: Nil];
beacon.bluetoothIdentifier = [peripheral.identifier UUIDString];
}
else if (serviceData != Nil) {
for (NSObject *key in serviceData.allKeys) {
NSString *uuidString = [(CBUUID *) key UUIDString];
NSScanner* scanner = [NSScanner scannerWithString: uuidString];
unsigned long long uuidLongLong;
[scanner scanHexLongLong: &uuidLongLong];
NSNumber *uuidNumber = [NSNumber numberWithLongLong:uuidLongLong];
NSData *adServiceData = [serviceData objectForKey:key];
if (adServiceData) {
beacon = [beaconParser fromScanData: adServiceData withRssi: RSSI forDevice: peripheral serviceUuid: uuidNumber];
}
}
}
if (beacon != Nil) {
break;
}
}
if (beacon != Nil) {
NSString *key = [NSString stringWithFormat:@"%@ %@ %@", beacon.id1, beacon.id2, beacon.id3];
NSLog(@"Detected beacon: %@", key);
}
答案 2 :(得分:0)
不,没有位置服务就无法使用iBeacon。检查苹果文档中的内容:
iBeacon适用于iOS中的位置服务。使用iBeacon,您的iOS 当您接近或离开某个位置时,设备可以提醒应用。在 除了监控您的位置,应用程序还知道您何时关闭 到iBeacon,就像零售商店的收银台一样。代替 使用纬度和经度来确定您的位置,iBeacon使用 您的iOS设备检测到的蓝牙低能量信号。
有关详细信息,请参阅Apple support for iBracon
希望这会有所帮助:)