如何使用拉刷新在Swift?

我正在使用swift构建一个RSS阅读器，需要实现重新加载功能。

以下是我如何努力做到这一点。

class FirstViewController: UIViewController,
    UITableViewDelegate, UITableViewDataSource {

   @IBOutlet var refresh: UIScreenEdgePanGestureRecognizer
   @IBOutlet var newsCollect: UITableView

   var activityIndicator:UIActivityIndicatorView? = nil

   override func viewDidLoad() {
       super.viewDidLoad()
       self.newsCollect.scrollEnabled = true
      // Do any additional setup after loading the view, typically from a nib.

      if nCollect.news.count <= 2{
          self.collectNews()
       }
      else{
          self.removeActivityIndicator()
       }
      view.addGestureRecognizer(refresh)
   }



@IBAction func reload(sender: UIScreenEdgePanGestureRecognizer) {
    nCollect.news = News[]()
    return newsCollect.reloadData()
}

我得到:

财产的自我。刷新'未在super初始化。init调用

请帮助我理解手势识别器的行为。一个工作样例代码将是一个很大的帮助。

谢谢。

当前回答

斯威夫特5

private var pullControl = UIRefreshControl()

pullControl.attributedTitle = NSAttributedString(string: "Pull to refresh")
        pullControl.addTarget(self, action: #selector(refreshListData(_:)), for: .valueChanged)
        if #available(iOS 10.0, *) {
            tableView.refreshControl = pullControl
        } else {
            tableView.addSubview(pullControl)
        }
// Actions
@objc private func refreshListData(_ sender: Any) {
        self.pullControl.endRefreshing() // You can stop after API Call
        // Call API
    }

2020-01-13 12:55:44

其他回答

在Swift中使用这个，

如果你想在WebView中刷新，

所以试试这段代码:

override func viewDidLoad() {
    super.viewDidLoad()
    addPullToRefreshToWebView()
}

func addPullToRefreshToWebView(){
    var refreshController:UIRefreshControl = UIRefreshControl()

    refreshController.bounds = CGRectMake(0, 50, refreshController.bounds.size.width, refreshController.bounds.size.height) // Change position of refresh view
    refreshController.addTarget(self, action: Selector("refreshWebView:"), forControlEvents: UIControlEvents.ValueChanged)
    refreshController.attributedTitle = NSAttributedString(string: "Pull down to refresh...")
    YourWebView.scrollView.addSubview(refreshController)

}

func refreshWebView(refresh:UIRefreshControl){
    YourWebView.reload()
    refresh.endRefreshing()
}

2015-05-07 14:12:31

斯威夫特4

var refreshControl: UIRefreshControl!

override func viewDidLoad() {
    super.viewDidLoad()

    refreshControl = UIRefreshControl()
    refreshControl.attributedTitle = NSAttributedString(string: "Pull to refresh")
    refreshControl.addTarget(self, action: #selector(refresh), for: .valueChanged)
    tableView.addSubview(refreshControl) 
}

@objc func refresh(_ sender: Any) {
    //  your code to reload tableView
}

你可以停止刷新:

refreshControl.endRefreshing()

2017-01-06 15:27:32

对于拉刷新，我正在使用

DGElasticPullToRefresh

https://github.com/gontovnik/DGElasticPullToRefresh

安装

豆荚的DGElasticPullToRefresh

import DGElasticPullToRefresh

然后把这个函数放到你的swift文件中，然后从你的

override func viewWillAppear(_ animated: Bool)

     func Refresher() {
      let loadingView = DGElasticPullToRefreshLoadingViewCircle()
      loadingView.tintColor = UIColor(red: 255.0/255.0, green: 255.0/255.0, blue: 255.0/255.0, alpha: 1.0)
      self.table.dg_addPullToRefreshWithActionHandler({ [weak self] () -> Void in

          //Completion block you can perfrom your code here.

           print("Stack Overflow")

           self?.table.dg_stopLoading()
           }, loadingView: loadingView)
      self.table.dg_setPullToRefreshFillColor(UIColor(red: 255.0/255.0, green: 57.0/255.0, blue: 66.0/255.0, alpha: 1))
      self.table.dg_setPullToRefreshBackgroundColor(self.table.backgroundColor!)
 }

不要忘记在视图消失时删除引用

要删除拉刷新，请将此代码放入您的

重写func viewDidDisappear(_ animated: Bool)

override func viewDidDisappear(_ animated: Bool) {
      table.dg_removePullToRefresh()

 }

看起来就像

快乐编码:)

2017-05-31 11:50:02

斯威夫特5

private var pullControl = UIRefreshControl()

pullControl.attributedTitle = NSAttributedString(string: "Pull to refresh")
        pullControl.addTarget(self, action: #selector(refreshListData(_:)), for: .valueChanged)
        if #available(iOS 10.0, *) {
            tableView.refreshControl = pullControl
        } else {
            tableView.addSubview(pullControl)
        }
// Actions
@objc private func refreshListData(_ sender: Any) {
        self.pullControl.endRefreshing() // You can stop after API Call
        // Call API
    }

2020-01-13 12:55:44

我构建了一个RSS提要应用程序，在其中我有一个Pull To refresh功能，它最初有上面列出的一些问题。

但是为了补充上面用户的答案，我到处寻找我的用例，但没有找到它。我正在从网络(RSSFeed)下载数据，我想下拉我的故事tableView来刷新。

上面提到的内容涵盖了正确的领域，但人们遇到了一些问题，以下是我所做的，它很有效:

我采取了@Blankarsch的方法，去了我的主。然后选择表视图来使用刷新，然后没有提到的是创建IBOutlet和IBAction来有效地使用刷新

//Created from main.storyboard cntrl+drag refresh from left scene to assistant editor @IBOutlet weak var refreshButton: UIRefreshControl override func viewDidLoad() { ...... ...... //Include your code ...... ...... //Is the function called below, make sure to put this in your viewDidLoad //method or not data will be visible when running the app getFeedData() } //Function the gets my data/parse my data from the web (if you havnt already put this in a similar function) //remembering it returns nothing, hence return type is "-> Void" func getFeedData() -> Void{ ..... ..... } //From main.storyboard cntrl+drag to assistant editor and this time create an action instead of outlet and //make sure arguments are set to none and note sender @IBAction func refresh() { //getting our data by calling the function which gets our data/parse our data getFeedData() //note: refreshControl doesnt need to be declared it is already initailized. Got to love xcode refreshControl?.endRefreshing() }

希望这能帮助到和我处境相同的人

2015-02-24 23:21:39

如何使用拉刷新在Swift?

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