如何在iOS上搜索和连接附近的经典蓝牙设备（Not BLE）？

Question

I need to search nearby by bluetooth device those are classic Bluetooth (Bluetooth 2.1 or later). I searched a lot but there are only library and discussion about the BLE any guidance will help me a lot.

Answer 1

As far as I know, you can't find them until you don't manually pair and connect them. In order to discover the already paired and connected ones, I use this:

import AVFoundation
func example() {
    let session = AVAudioSession.sharedInstance()
    do {
        try session.setCategory(AVAudioSessionCategoryPlayAndRecord, with: AVAudioSessionCategoryOptions.allowBluetooth)
        if let inputs = session.availableInputs { ... } //should contain bluetooth devices aswell
    }
    catch { print("Failed to set category") }
}

`