在iOS 7中拉刷新

我正试图在我的表视图中使“拉入刷新”功能在iOS 7上正常工作。在viewDidLoad上，我有：

self.refreshControl = [[UIRefreshControl alloc] init];

    [self.refreshControl addTarget:self action:@selector(refreshInvoked:forState:) forControlEvents:UIControlEventValueChanged];

然后我运行：

-(void) refreshInvoked:(id)sender forState:(UIControlState)state {
    // Refresh table here...
    [_allEntries removeAllObjects];
    [self.tableView reloadData];
    [self refresh];
}

当刷新方法调用的请求完成时，在didCompleteRequest代码中，我有：

[self.refreshControl endRefreshing];

---

在iOS 6上，这意味着当你在桌面视图上向下拉时，它会显示一个圆形箭头，当你拉的时候它会被拉长，拉得足够远后，它会刷新。但现在，我看不到圆形箭头，只看到UIActivityIndicator。它有时有效，有时无效。我缺少什么？

您所说的“UIActivityIndicator”是UIRefreshControl的新默认外观

---

您向下拉，圆圈完成时，它显示您离触发刷新有多近。

要在UITableView中添加UIRefreshControl…

- (void)viewDidLoad
{
    [super viewDidLoad];

    //to add the UIRefreshControl to UIView
    UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
    refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Please Wait..."]; //to give the attributedTitle
    [refreshControl addTarget:self action:@selector(refresh:) forControlEvents:UIControlEventValueChanged];
    [tblVideoView addSubview:refreshControl];
}

- (void)refresh:(UIRefreshControl *)refreshControl
{
    [self refreshTableData]; //call function you want
    [refreshControl endRefreshing];
}

1）在视图中加载..

- (void)viewDidLoad
{
    [super viewDidLoad];

    //to add the UIRefreshControl to UIView
    UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
    refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Please Wait..."]; //to give the attributedTitle
    [refreshControl addTarget:self action:@selector(refresh:) forControlEvents:UIControlEventValueChanged];
    [tblVideoView addSubview:refreshControl];
}

- (void)refresh:(UIRefreshControl *)refreshControl
{
    [self refreshTableData]; //call function you want
    [refreshControl endRefreshing];
}

2）调用相关方法刷新UITableView数据…

- (void)viewDidLoad
{
    [super viewDidLoad];

    //to add the UIRefreshControl to UIView
    UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
    refreshControl.attributedTitle = [[NSAttributedString alloc] initWithString:@"Please Wait..."]; //to give the attributedTitle
    [refreshControl addTarget:self action:@selector(refresh:) forControlEvents:UIControlEventValueChanged];
    [tblVideoView addSubview:refreshControl];
}

- (void)refresh:(UIRefreshControl *)refreshControl
{
    [self refreshTableData]; //call function you want
    [refreshControl endRefreshing];
}

或用于Swift

 let refreshControl : UIRefreshControl = UIRefreshControl.init()
 refreshControl.attributedTitle = NSAttributedString.init(string: "Please Wait...")
 refreshControl.addTarget(self, action: #selector(refresh), forControlEvents: UIControlEvents.ValueChanged)
 feedTable.addSubview(refreshControl)

 func refresh(refreshControl:UIRefreshControl){
      self.refreshTableData()//call function you want
      refreshControl.endRefreshing()
 }

---

您可以删除/隐藏默认活动指示器，并添加自己的图像和动画

还有一个特定的阈值（距离），在调用刷新之前必须将表拉过该阈值

以下是我们的自定义拉刷新控件教程（在objective-c和swift中）：

希望有帮助，如果我能回答任何其他问题，请告诉我

对于TableView

 - (void)viewDidLoad
 {
    let refreshControl = UIRefreshControl()
    refreshControl.attributedTitle = NSAttributedString(string: "Please  Wait..")
    tableView.addSubview(refreshControl)
    refreshControl.addTarget(self, action: #selector(refreshTable), forControlEvents: UIControlEventValueChanged)
 }

- (void)refreshTable {
    //Refresh Data here
    //......
    //Once all the data is fetched. If you are loading asynchronously add the below code inside the async block
    refreshControl.endRefreshing()
    [tableView reloadData];
 }

对于UITableViewController

在UITableViewController中，有一个名为refreshControl的默认属性，默认情况下为nil。如果需要，只需初始化refreshControl并分配它

let refreshControl = UIRefreshControl()
refreshControl.attributedTitle = NSAttributedString(string: "Please Wait..")
yourTableViewController.refreshControl = refreshControl

---

iOS 7中UIRefreshControl的默认外观是activityindicator。代码中也缺少此项：[self.myTableView addSubview:refreshControl]；我看不出这在应用程序中有什么区别。尝试使用和不使用

[self.tableView addSubview:self.refreshControl]并且没有看到任何更改@Nikos M.更详细的回答：谢谢，所以就我发布的代码而言，不需要更多了？（我意识到我遗漏了我为填充表而创建的实际刷新方法）。不，你可以走了。你可以改变它的颜色，但不幸的是，没有办法恢复到老的类似于柏忌的风格。你能告诉我，当我们释放它时，我们如何消除他或小延迟？