第一次用swift写完整的Demo

1.倒入框架蓝牙

import CoreBluetooth

2.遵守协议

class AppDelegate: UIResponder, UIApplicationDelegate,CBCentralManagerDelegate,
CBPeripheralDelegate {

3.声明变量和初始化

var centralManager:CBCentralManager!
var selectedPeripheral:CBPeripheral?
var deviceArray:NSMutableArray = []
var characterFFB0:CBCharacteristic?

 self.deviceArray = NSMutableArray.init()
 self.centralManager = CBCentralManager.init(delegate:self, queue: nil, options: [CBCentralManagerOptionShowPowerAlertKey:(true)])

4.方法的调用

 func addView() {
        
 }
 self.addView()

5.通知的发送和接收

 <!--发送-->
NotificationCenter.default.post(Notification.init(name: Notification.Name(rawValue: "readMac")))
 
  <!--接收-->
NotificationCenter.default.addObserver(self, selector: #selector(readMac), name: NSNotification.Name(rawValue: "readMac"), object: nil)
 
 <!--通知的方法-->
  @objc func readMac(){
        self.selectedPeripheral?.readValue(for:self.characterFFB3!)
    }

6.byte数组转成Data

var byte:[UInt8] = [0,0,0,0,0,0]
byte[0] = UInt8(year)
byte[1] = UInt8(month)
byte[2] = UInt8(day)
byte[3] = UInt8(hour)
byte[4] = UInt8(min)
byte[5] = UInt8(sec)            
let data = Data.init(bytes:byte)

7.系统版本的判断和 switch case方法

 if #available(iOS 10.0, *) {
      switch central.state{
      case .poweredOn:
          print("powerOn")
      case .unknown:
          print("unknown")
      case .resetting:
          print("restting")
      case .unsupported:
          print("unsupported")
      case .unauthorized:
          print("unauthorized")
      case .poweredOff:
          print("powerOff")
      }
}

8.error 判断

 if (error != nil) {
       print("\(error.debugDescription)")
 }

9.字符串判断

<!--同 isEqualToString-->
if uuidStr == "FFB4"

10.声明常量

 let screenWidth = UIScreen.main.bounds.size.width;
 let screenHeight = UIScreen.main.bounds.size.height;

11.自定义collectionView

 func addCollectionView() {
        let flowLayout = UICollectionViewFlowLayout.init();
        flowLayout.itemSize = CGSize.init(width: (screenWidth-20 * 2-10 * 2)/3.0, height:  (screenWidth-20 * 2-10 * 2)/3.0)
        flowLayout.minimumInteritemSpacing = 10;
        flowLayout.minimumLineSpacing = 10;
        flowLayout.sectionInset = UIEdgeInsetsMake(10, 0, 10, 0);
        
        let collectionView = UICollectionView.init(frame: CGRect.init(x: 20, y:self.deviceLab.frame.maxY+10, width:screenWidth-20*2, height:screenHeight-self.deviceLab.frame.maxY-10), collectionViewLayout: flowLayout)
        collectionView.delegate = self;
        collectionView.dataSource = self;
        collectionView.register(MainCell.self, forCellWithReuseIdentifier: "reusedID")
        collectionView.backgroundColor = UIColor.white
        collectionView.showsVerticalScrollIndicator = false;
        collectionView.showsHorizontalScrollIndicator  = false;
        
        self.view.addSubview(collectionView)
}

12.自定义collectionViewCell

import UIKit

class MainCell: UICollectionViewCell {
    
    var imgView:UIImageView!
    var titelLab:UILabel!
    
    override init(frame: CGRect) {
       super.init(frame: frame)
       setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
     fatalError("init(coder:) has not been implemented")
        
    }
    
    func setupUI() {  //无返回值的参数
        imgView = UIImageView.init();
        titelLab = UILabel.init();
        
        titelLab.font = UIFont.systemFont(ofSize: 14);
        titelLab.textAlignment = NSTextAlignment.center;
        titelLab.textColor = UIColor.black;
     
        self.addSubview(imgView)
        self.addSubview(titelLab)
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        let  frame:CGRect = self.frame
        
        self.imgView.frame = CGRect.init(x: 0, y: 0, width:frame.size.width , height: frame.size.height-20)
        self.titelLab.frame = CGRect.init(x: 0, y: frame.size.height-20, width: frame.size.width, height: 20)
    }
    
}

13.添加tableView

 func addTabView() {
        self.tableView = UITableView.init(frame:CGRect.init(x: 0, y:0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height), style: UITableViewStyle.plain)
        self.tableView?.delegate = self;
        self.tableView?.dataSource = self;
        self.tableView?.rowHeight = 68;
        self.tableView?.showsVerticalScrollIndicator = false;
        self.tableView?.tableFooterView = UIView.init();
        self.tableView?.tableHeaderView = UIView.init()
        self.tableView?.register(ListCell.self, forCellReuseIdentifier: "Cell")
        self.view.addSubview(self.tableView!);
    }

14.自定义tableViewCell

import UIKit
class ListCell: UITableViewCell {

    var nameLab:UILabel!
    var rssiLab:UILabel!
    
    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier);
        setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
        
    }
    
    func setupUI() {
        nameLab = UILabel.init();
        nameLab.font = UIFont.systemFont(ofSize: 14)
        nameLab.textAlignment = NSTextAlignment.left;
        nameLab.textColor = UIColor.black;
        addSubview(self.nameLab)
        
        rssiLab = UILabel.init();
        rssiLab.font = UIFont.systemFont(ofSize: 13)
        nameLab.textAlignment = NSTextAlignment.center;
        nameLab.textColor = UIColor.black;
        self.addSubview(self.rssiLab)
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        self.nameLab.frame = CGRect.init(x: 20, y: 20, width: 100, height: 28);
        self.rssiLab.frame = CGRect.init(x: 140, y: 20, width: 100, height: 28);
    }

    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

}

以上只是我自己的记录，可能存在问题。