为UIWebView使用UIRefreshControl

Question

我在iOS 6中看到了UIRefreshControl，我的问题是，是否可以通过拉下WebView来刷新它，然后让它像邮件一样弹出？我使用的拉比代码是WebView：

UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
    [refreshControl addTarget:self action:@selector(handleRefresh:) forControlEvents:UIControlEventValueChanged];
    [rabih addSubview:rabih];

Answer 1

下面是使用下拉菜单刷新UIWebview的方法：

- (void)viewDidLoad
{
   [super viewDidLoad];
   // Do any additional setup after loading the view, typically from a nib.

   // Make webView a delegate to itself

   // I am going to add URL information
   NSString *fullURL = @"http://www.umutcankoseali.com/";
   NSURL *url = [NSURL URLWithString:fullURL];
   NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
   _webView.delegate = (id)self;
   [_webView loadRequest:requestObj];

   UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
   [refreshControl addTarget:self action:@selector(handleRefresh:) forControlEvents:UIControlEventValueChanged];
   [_webView.scrollView addSubview:refreshControl]; //<- this is point to use. Add "scrollView" property.
}

-(void)handleRefresh:(UIRefreshControl *)refresh {
   // Reload my data
   NSString *fullURL = @"http://www.umutcankoseali.com/";
   NSURL *url = [NSURL URLWithString:fullURL];
   NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
   [_webView loadRequest:requestObj];
   [refresh endRefreshing];
}

Answer 2

在Swift中使用这个，

假设您希望在WebView中使用pull来刷新，

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()
}

在Objective-C中，我使用了这个：

- (void)addPullToRefreshToWebView{
    UIColor *whiteColor = [UIColor whiteColor];
    UIRefreshControl *refreshController = [UIRefreshControl new];
    NSString *string = @"Pull down to refresh...";
    NSDictionary *attributes = @{ NSForegroundColorAttributeName : whiteColor };
    NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:string attributes:attributes];
    refreshController.bounds = CGRectMake(0, 0, refreshController.bounds.size.width, refreshController.bounds.size.height);
    refreshController.attributedTitle = attributedString;
    [refreshController addTarget:self action:@selector(refreshWebView:) forControlEvents:UIControlEventValueChanged];
    [refreshController setTintColor:whiteColor];
    [self.webView.scrollView addSubview:refreshController];
}

- (void)refreshWebView:(UIRefreshControl*)refreshController{
    [self.webView reload];
    [refreshController endRefreshing];
}

Answer 3

我已经非常快速地将以下代码添加到我的代码中：

[webserver.scrollView addSubview:refreshControl]

所以看起来UIWebView本身就有一个UIScrollView，你可以直接连接到它上。希望它对你有用。