cloudmusic/cloudmusic/SearchController.swift

//
//  SearchController.swift
//  cloudmusic
//
//  Created by Qihua Pan on 2020/7/3.
//  Copyright © 2020 Qihua Pan. All rights reserved.
//

import UIKit
import SwiftyJSON
import CoreData
class SearchController: UIViewController {

    // 注意: Swift中mark注释的格式: MARK:-
    // MARK:- 属性
    let cellID = "cell"
    //关键词
    @IBOutlet weak var keyword: UITextField!
    
    //搜索结果表格
    @IBOutlet weak var musicTable: UITableView!
    
    //搜索结果
    
    var musicList:[cloudmusic.Music]=[]
    
    
    //关键词检索歌曲
    @IBAction func search(_ sender: UIButton) {
        self.textFieldShouldReturn(keyword)
        if let k=keyword{
            if k.text!.count>0{
                MusicRequest.search(keyword: k.text!,callback: {(json) in
                    debugPrint("json:\(String(describing: json))")
                    if let res=json{
                        if res["code"]==200{
                            self.musicList=[]
                            for (_,subJson):(String, JSON) in res["result"]["songs"] {
//                                debugPrint("index=\(index),subJson=\(subJson)")
                                let context=self.getContext()
                                let music = NSEntityDescription.insertNewObject(forEntityName: "Music", into: context) as! Music
                                music.id=subJson["id"].int64Value
                                music.name=subJson["name"].stringValue
                                debugPrint("id=\(music.id),name=\(String(describing: music.name))")
                                self.musicList.append(music)
                            }
                            self.musicTable.reloadData()
                            self.musicTable.isHidden=false
                        }else{
                            self.alert(message: "请求失败，请稍后再试")
                        }
                    }else{
                        self.alert(message: "请求失败，请稍后再试")
                    }
                })
            }else{
                self.alert(message: "关键词不能为空")
            }
        }
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()

          // Do any additional setup after loading the view.
          // 设置数据源代理
         self.musicTable.dataSource = self
         self.musicTable.delegate = self
         self.musicTable.isHidden=true

          // 注册cell
        self.musicTable.register(UITableViewCell.self, forCellReuseIdentifier: cellID)
        
        self.keyword.delegate=self
        self.keyword.returnKeyType=UIReturnKeyType.done
        
        
    }
    

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}

extension SearchController: UITableViewDataSource,UITableViewDelegate{
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return musicList.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: cellID)
    
        cell?.textLabel?.text = "歌曲名:\(String(describing: musicList[indexPath.row].name!))"
        return cell!
    }
    
    
}

extension SearchController:UITextFieldDelegate{
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        self.keyword.resignFirstResponder()
        return true
    }
    
    func textFieldDidEndEditing(_ textField: UITextField) {
        self.search(UIButton())
    }
}