扫描特定UUID时，核心蓝牙无法找到外围设备

Question

所以当谈到蓝牙时，我是一个新手，我正在尝试让它扫描设备，如果我尝试使用这个来扫描所有设备：

self.centralManager.scanForPeripherals(withServices: nil, options: nil);

它找到了几个设备，我打印出uuidStrings并获得了几个设备uuids但是当我尝试搜索那些特定的uuids时它找不到任何东西，这就是我正在使用的代码：

private var uuidArray = ["8B2F2570-9E3B-1FB6-C76E-9258526B662B",
                         "4A29E654-F59F-53AD-D7F6-B435B8BBAB78",
                         "48F038D0-246C-4D62-A025-1D822CAFB93A",
                         "D8E13B7A-BB89-45C2-8747-BAE1D94AE9E0",
                         "558CF744-2C4F-439F-AD7F-E2212938123B",
                         "967B98AC-FFE7-45EC-8D25-0276FBD57FC8"];

func scanForPeripherals (timeout: Double) -> Bool {
    if (self.centralManager.state != .poweredOn) {

        print ("[BLE] Central Manager is not powered on");
        return false;
    }
    print ("[BLE] Start Scan");

    Timer.scheduledTimer(timeInterval: timeout, target: self, selector: #selector(stopScan), userInfo: nil, repeats: false)

    var services: [CBUUID] = [];

    for uuid in uuidArray {
        let cbuuid = CBUUID(string: uuid);
        services.append(cbuuid);
    }


    self.centralManager.scanForPeripherals(withServices: services, options: nil);
    return true;

}

我在这里错过了什么吗？有谁知道如何找到特定的设备？