iOS CoreBluetooth无法在iPad Air中扫描服务 [英] iOS CoreBluetooth not scanning for services in iPad Air
问题描述
我正在开发一个连接到BLE外围设备并从中接收数据的应用程序。
I'm working on a app that connects to a BLE peripheral and receives data from it.
它扫描外围设备,找到外围设备,发现服务,并如果找到正确的服务,它将接收数据。
It scans for peripherals, finds a peripheral, discovers services, and if the right service is found, it receives data.
它在iPhone 5上运行良好,但是当我在iPad Air上运行时,它可以连接,但不能发现任何服务,并且不接收任何数据。两种设备都运行iOS 7.0.4
It works great on an iPhone 5, but when I run it on an iPad Air it connects , but doesn't discover any services, and receives no data. Both devices run iOS 7.0.4
这是代码的一些相关部分
This is some of the relevant parts of the code
- (void)startScan
{
[manager scanForPeripheralsWithServices:nil options:nil];
}
- (void)stopScan
{
[manager stopScan];
}
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{
NSLog(@"Did discover peripheral. peripheral: %@ rssi: %@, id: %@ advertisementData: %@ ", peripheral, RSSI, peripheral.identifier, advertisementData);
if(![self.dicoveredPeripherals containsObject:peripheral])
[self.dicoveredPeripherals addObject:peripheral];
[manager retrievePeripheralsWithIdentifiers:[NSArray arrayWithObject:(id)peripheral.identifier]];
[manager connectPeripheral:peripheral options:[NSDictionary dictionaryWithObject: [NSNumber numberWithBool:YES] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey]];
}
- (void)centralManager:(CBCentralManager *)central didRetrievePeripherals:(NSArray *)peripherals
{
NSLog(@"Retrieved peripheral: %lu - %@", (unsigned long)[peripherals count], peripherals);
[self stopScan];
/* If there are any known devices, automatically connect to it.*/
if([peripherals count] >= 1)
{
testPeripheral = [peripherals objectAtIndex:0];
[manager connectPeripheral:testPeripheral
options:[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey]];
}
}
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral
{
NSLog(@"Did connect to peripheral: %@", peripheral);
[self.delegate statusMessage:[NSString stringWithFormat:@"Did connect to peripheral: %@\n", peripheral]];
[peripheral setDelegate:self];
[peripheral discoverServices:nil];
}
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error
{
for (CBService *service in peripheral.services) {
NSLog(@"discovered service [%@]",service.UUID);
[peripheral discoverCharacteristics:nil forService:service];
}
}
iPhone 5的日志输出为:
The log output on the iPhone 5 is :
Did discover peripheral. peripheral: <CBPeripheral: 0x14587320 identifier = 3EE10DD6-99CD- 7E9C-C492-087CE3B980E6, Name = "BLE Sens", state = disconnected> rssi: -53, id: <__NSConcreteUUID 0x145f82f0> 3EE10DD6-99CD-7E9C-C492-087CE3B980E6 advertisementData: {
kCBAdvDataChannel = 38;
kCBAdvDataIsConnectable = 1;
kCBAdvDataLocalName = BLESensor;
kCBAdvDataServiceUUIDs = (
"Unknown (<fff0>)"
);
kCBAdvDataTxPowerLevel = 0;
}
Did connect to peripheral: <CBPeripheral: 0x14587320 identifier = 3EE10DD6-99CD-7E9C-C492-087CE3B980E6, Name = "BLE Sens", state = connected>
Connected
discovered service [Device Information]
discovered service [Unknown (<fff0>)]
discovered service [Unknown (<ffe0>)]
Service found with UUID: Device Information
在iPadAir上,它仅到达连接的部分,并且找不到服务:
On the iPadAir it just gets to the connected part and no services are found :
Did discover peripheral. peripheral: <CBPeripheral: 0x1700a1440 identifier = 23890BB4-FB07-AA1A-8D4F-B1427C859447, Name = "BLE Sens", state = disconnected> rssi: -60, id: <__NSConcreteUUID 0x17802f740> 23890BB4-FB07-AA1A-8D4F-B1427C859447 advertisementData: {
kCBAdvDataChannel = 39;
kCBAdvDataIsConnectable = 1;
kCBAdvDataLocalName = BLESensor;
kCBAdvDataServiceUUIDs = (
"Unknown (<fff0>)"
);
kCBAdvDataTxPowerLevel = 0;
}
Did connect to peripheral: <CBPeripheral: 0x1700a1440 identifier = 23890BB4-FB07-AA1A-8D4F-B1427C859447, Name = "BLE Sens", state = connected>
Connected
推荐答案
Apple承认这是一个iOS 7.0中的问题。他们承诺在iOS 7.1中解决该问题。我在iOS 7.1上进行了测试,并解决了该问题。
Apple admitted that this was an issue in iOS 7.0 . They promised to solve it in iOS 7.1. I tested it with iOS 7.1 , and it is solved.
这篇关于iOS CoreBluetooth无法在iPad Air中扫描服务的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!