Swift 不允许蓝牙写入

Question

我尝试用 Bluejay 库将命令形式 iphone 写入 BT ble，如下所示

func write(command: Command) {
    let weakSelf = self
    Utils.delay(0.3) {
        debugPrint("[\(self.getTodayString())]Writing to device: \(command.string)");
        debugPrint("hunter: weakSelf.bdeCharacteristics = \(weakSelf.bdeCharacteristics) and bdeService= \(weakSelf.bdeService) , and isConnected = \(weakSelf.isConnected)");

        weakSelf.bluejay.write(to: weakSelf.bdeCharacteristics, value: command.string) { (result) in
            switch result {
            case .success:
                debugPrint("Write to sensor location is successful.")
            //case .cancelled:
                //debugPrint("Cancelled write to sensor location.")
            case .failure(let error):
                debugPrint("Failed to write to sensor location with error: \(error.localizedDescription)")
            }
        }
    }

}

写命令时，日志如下：

"[2020-1-13 0:30:24]Writing to device: SystemOn:\n[=12=]" 2020-01-13 00:30:24.247 [Bluejay] [main] > Requesting write on Characteristic: 0000FFB2-0000-1000-8000-00805F9B34FB, Service: 0000FFB0-0000-1000-8000-00805F9B34FB... 2020-01-13 00:30:24.248 [Bluejay] [main] > Queue will start Bluejay.DiscoverService... 2020-01-13 00:30:24.248 [Bluejay] [main] > Queue has removed Bluejay.DiscoverService because it has finished. 2020-01-13 00:30:24.249 [Bluejay] [main] > Queue is empty, nothing to update. 2020-01-13 00:30:24.249 [Bluejay] [main] > Queue will start Bluejay.DiscoverCharacteristic... 2020-01-13 00:30:24.250 [Bluejay] [main] > Bluejay.WriteCharacteristic added to queue with UUID: 15A4B937-7BCB-4F02-B6D5-96E04D480320. 2020-01-13 00:30:24.250 [Bluejay] [main] > Queue has removed Bluejay.DiscoverCharacteristic because it has finished. 2020-01-13 00:30:24.251 [Bluejay] [main] > Queue will start Bluejay.WriteCharacteristic... 2020-01-13 00:30:24.252 [Bluejay] [main] > Started write to Characteristic: 0000FFB2-0000-1000-8000-00805F9B34FB, Service: 0000FFB0-0000-1000-8000-00805F9B34FB on 845E44D2-42EE-7B03-CC5D-10675DF5DB09. 2020-01-13 00:30:24.253 [Bluejay] [main] > Failed writing to Characteristic: 0000FFB2-0000-1000-8000-00805F9B34FB, Service: 0000FFB0-0000-1000-8000-00805F9B34FB on 845E44D2-42EE-7B03-CC5D-10675DF5DB09 with error: Writing is not permitted. "Failed to write to sensor location with error: Writing is not permitted."

结果显示：无法写入传感器位置，出现错误：不允许写入。

注：项目原形swift3升级为swift4

Answer 1

根据 i found this solution

CBCharacteristicWriteWithResponse 在 swift 4

之后更改为 withoutResponse

所以我用 withResponse 替换 withResponse ，这个问题就解决了。

Swift 不允许蓝牙写入

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