是的,BLE设备可以通过发送数据来唤起处于睡眠模式的应用程序。要实现此功能,需使用iOS中的CoreBluetooth框架,并将应用程序设置为支持后台运行。
以下是示例代码:
UIBackgroundModes
bluetooth-central
centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil options:nil];
peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self queue:nil options:nil];
NSArray *peripherals = [centralManager retrievePeripheralsWithIdentifiers:@[myPeripheralID]];
if (peripherals.count > 0) {
peripheral = [peripherals objectAtIndex:0];
[centralManager connectPeripheral:peripheral options:nil];
}
[peripheral readValueForCharacteristic:myCharacteristic];
[peripheral writeValue:myData forCharacteristic:myCharacteristic type:CBCharacteristicWriteWithResponse];
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral {
peripheral.delegate = self;
[peripheral discoverServices:nil];
}
- (void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
NSData *data = characteristic.value;
// 处理数据
}
通过以上步骤,BLE设备可以在后台模式下向应用程序发送数据并唤醒应用程序。