I am Working on BLE project, everything works fine when the app in the foreground.It can discover and connect to the peripheral, all the call back method work perfectly.
But the problem is that, when the app in the background mode (I press home button). Only the
centralManagerDidUpdateState
- (void)centralManagerDidUpdateState:(CBCentralManager *)central{
switch (central.state) {
case CBCentralManagerStatePoweredOn:
[self.cbCentralManager scanForPeripheralsWithServices:nil options:@{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES }];
break;
default:
break;
}
}
scanForPeripheralsWithServices:nil
didDiscoverPeripheral
didDiscoverPeripheral
Paulw11 said are right, If your app find the peripherals in the foreground. It will not call the didDiscoverPeripheral
for the same peripherals when it enters the background.
For more information about the iOS BLE Behavior in the background mode. You can check this answer What exactly can CoreBluetooth applications do whilst in the background?