swift中的UITableView学习总结 - Swift

UITableView - Swift

在这里就不过多的去介绍object-c中的UITableView与Swift的区别了，直接总结在Swift中的用法，我也是在学习有不足的地方可以共同探讨。

Swift中使用TableView和object-c中的流程一样，同样需要注册cell、实现相关的代理方法、cell的重用机制。

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import UIKit
 
let cell_identifier: String = "Cell"
/*
var infoTableView = UITableView()
var itemArr = NSMutableArray()
*/
class SecondViewController: UIViewController,
UITableViewDelegate,
UITableViewDataSource {
     
    var infoTableView:UITableView? = nil    //声明tableView变量
    var itemArr:NSMutableArray = []         //声明可变数组变量
     
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
         
    }
    override func viewDidLoad() {
        super.viewDidLoad()
         
        // Do any additional setup after loading the view.
        view.backgroundColor = UIColor.white
        self.createSubViews()
    }
    func createSubViews() {
         
        self.itemArr = NSMutableArray.init(array: ["郑州","开封","洛阳","焦作","新乡","周口","济源","漯河","信阳","安阳","许昌"])
        //UITableView 初始化
        self.infoTableView = UITableView (frame: view.bounds,style: UITableViewStyle.plain)
        self.infoTableView?.tableFooterView = UIView()
        self.infoTableView?.dataSource = self
        self.infoTableView?.delegate = self
        self.infoTableView?.setEditing(true, animated: true)
        self.view.addSubview(self.infoTableView!)
         
        //注册 cell
        self.infoTableView?.register(UITableViewCell.self, forCellReuseIdentifier: cell_identifier)
        //这种注册cell的方法也可以
        //infoTableView.register(UITableViewCell.classForCoder(), forCellReuseIdentifier: cell_identifier)
    }
     
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
         
        return itemArr.count
    }
     
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
         
        return 60.0
    }
     
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: cell_identifier, for: indexPath)
        cell.textLabel?.text = (itemArr[indexPath.row] as! String)
        return cell
    }
     
    //分割线从左端顶部显示(使cell的)分割线与屏幕的左右两端对齐显示
    func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
         
        if(cell.responds(to: #selector(setter: UITableViewCell.separatorInset))){
            cell.separatorInset = .zero
        }
        if(cell.responds(to: #selector(setter: UITableViewCell.layoutMargins))){
             
            cell.layoutMargins = .zero
        }
    }
     public func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath){
       //单独删除单元格
        if editingStyle ==  UITableViewCellEditingStyle.delete{
            self.itemArr.remove(at: indexPath.row)
            tableView.deleteRows(at: [indexPath], with:.top)
            print("单独删除cell单元格响应！")
            let alertCon = UIAlertController.init(title: "提示", message: "您正在进行UItableViewCell的删除操作，是否删除？", preferredStyle:UIAlertControllerStyle.actionSheet)
            let doneAction = UIAlertAction.init(title: "删除", style: UIAlertActionStyle.destructive, handler: { (UIAlertAction) -> Void in
                 
                print("alertView确定响应！")
            })
             
            let cancleAction = UIAlertAction.init(title: "放弃", style: UIAlertActionStyle.default, handler: { (UIAlertAction) -> Void in
                 
                print("alertView取消响应！")
                 
            })
             
            alertCon.addAction(doneAction)
            alertCon.addAction(cancleAction)
            self.present(alertCon, animated: true, completion: nil)
            //插入一个单元格数据
        }else if editingStyle == UITableViewCellEditingStyle.insert{
             
            print("insert响应！")
             
            let alertCon = UIAlertController.init(title: "提示", message: "您正在进行UItableViewCell的插入操作？", preferredStyle:UIAlertControllerStyle.alert)
            let doneAction = UIAlertAction.init(title: "确定", style: UIAlertActionStyle.default, handler: { (UIAlertAction) -> Void in
 
                print("alertView确定响应！")
                self.itemArr .insert("郑州(新增)", at: indexPath.row)
                self.infoTableView?.reloadData()
                 
            })
             
            let cancleAction = UIAlertAction.init(title: "取消", style: UIAlertActionStyle.default, handler: { (UIAlertAction) -> Void in
                 
                print("alertView取消响应！")
                 
            })
            alertCon.addAction(doneAction)
            alertCon.addAction(cancleAction)
            self.present(alertCon, animated: true, completion: nil)
        }
     }
     
     public func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCellEditingStyle{
        print("单元格cell删除设置响应")
        //返回的cell的样式 是带有选择按钮的样式
        //return UITableViewCellEditingStyle(rawValue: UITableViewCellEditingStyle.RawValue(UInt8(UITableViewCellEditingStyle.insert.rawValue)|UInt8(UITableViewCellEditingStyle.delete.rawValue)))!
         
        return UITableViewCellEditingStyle.delete
     }
     
     
    //自定义左滑显示项目 (实现此代理方法时需要设置TableView的setEditing为NO 否则没有实际的效果, 也可以设置代理editingStyleForRowAt返回UITableViewCellEditingStyle.delete 此时点击cell左侧的按钮cell会自动向左侧滑呼出自定义的操作按钮)
    /*func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
         
        //删除操作
        let deleteAction = UITableViewRowAction.init(style: .default, title: "删除", handler: {_,_ in
             
        })
        deleteAction.backgroundColor = UIColor.red
         
        let editAction = UITableViewRowAction.init(style: UITableViewRowActionStyle.normal, title: "编辑", handler: {_,_ in
             
        })
        let insertAction = UITableViewRowAction.init(style: UITableViewRowActionStyle.normal, title: "插入", handler: {_,_ in
             
        })
        insertAction.backgroundColor = UIColor.blue
         
        let topAction = UITableViewRowAction.init(style: UITableViewRowActionStyle.normal, title: "置顶", handler: {_,_ in
             
        })
        editAction.backgroundColor = UIColor.green
         
        return [deleteAction,editAction,insertAction,topAction]
    }*/
     
    //是否允许cell进行编辑 默认允许
    func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
         
        return true
    }
     
    //是否允许cell排序
    func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
         
        print("是否允许cell排序的响应！")
        return true
    }
     
    //cell排序操作
    func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
         
        self.infoTableView?.moveRow(at: sourceIndexPath, to: destinationIndexPath)
        self.itemArr.exchangeObject(at: sourceIndexPath.row, withObjectAt: destinationIndexPath.row)
         
        print("cell排序响应！")
    }
     
    //选中某个 cell
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
      
        print("cell点击响应")
    }
     
    //如果需要实现cell按下高亮，手放开恢复原状态，则实现如下方法即可：
    func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
         
        tableView.deselectRow(at: indexPath, animated: true)
    }
     
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
     
    /*
    // 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.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */
}

效果如下图所示：

自定义cell侧滑操作按钮效果：

public func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCellEditingStyle{
        //返回的cell的样式 是带有选择按钮的样式
        return UITableViewCellEditingStyle(rawValue: UITableViewCellEditingStyle.RawValue(UInt8(UITableViewCellEditingStyle.insert.rawValue)|UInt8(UITableViewCellEditingStyle.delete.rawValue)))!
     }

效果如下：

1	`- (UITableViewCellEditingStyle)tableView:(UITableView )tableView editingStyleForRowAtIndexPath:(NSIndexPath` `)indexPath;<br><br>//此代理方法返回UITableViewCellEditingStyle.delete cell是删除的效果如下图1<br><br>//返回UITableViewCellEditingStyle.insert 是插入添加的效果如下图2`

图一：