SolarBT_iOS/SolarBT/Classes/Main/UI/Home/BLEConnectUtils.swift

//
//  BLEConnectUtils.swift
//  SolarBT
//
//  Created by weclouds on 2019/11/4.
//  Copyright © 2019 weclouds. All rights reserved.
//

import UIKit

class BLEConnectUtils: NSObject {
     
    static let shared : BLEConnectUtils = {
        let  tool = BLEConnectUtils()
        return tool
     }()
    
    var startWrite:(()->Void)?
    
    private var timer: DispatchSourceTimer?
    
    //查询是否可写
    func checkWriteStatus(_ startWrite : @escaping (()->Void))  {
        self.startWrite = startWrite
        timer = DispatchSource.makeTimerSource(flags: [], queue: DispatchQueue.global())
        //dealiyne 开始执行时间
        //repeating : 重复时间将
        //leewa : 时间精度
        timer?.schedule(deadline: .now() + .seconds(0), repeating: DispatchTimeInterval.seconds(1), leeway: DispatchTimeInterval.seconds(0))
        timer?.setEventHandler(handler: {
            self.timerAction()
        })
        timer?.resume()
        
    }
    
    @objc func timerAction()   {
        let canWrite = BabyBluetoothSwift.shareInstance()?.canWrite()
        
        log.debug( "是否能写 --  \(canWrite)")
        if BabyBluetoothSwift.shareInstance()?.canWrite() == true {
            self.startWrite!()
            timer?.cancel()
            timer = nil
            
        }
    }
    
 
}