Swift:
let services = [CBUUID(string: SERVICE1_UUID), CBUUID(string: SERVICE2_UUID)]
centralManager.scanForPeripherals(withServices: services, options: nil)
Objective C:
NSArray *services = @[[CBUUID UUIDWithString:SERVICE1_UUID], [CBUUID UUIDWithString:SERVICE2_UUID]];
[centralManager scanForPeripheralsWithServices:services options:nil];