如何使用Pull在WebView（iOS 5）中刷新？

Question

如何在iOS 5中爲UIWebView創建「拉動以刷新」？我找不到教程。

我已經在Tab Bar應用程序中獲得WebView，並且想要使用「Pull to refresh」（刷新）來刷新WebView，就像Twitter一樣。

我在哪裏可以找到完整的教程？

謝謝

Answer 1

我不能提供一個教程，也許我會寫一個，但我認爲這是很簡單的， 我這樣做小幅修改SPPullView。在主要的UIViewController

Here you can grab the files (SPPullView.m and SPPullView.h).

相關的代碼是一樣的東西：

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    self.pullView = [[SPPullView alloc] initWithScrollView:self.webView.scrollView]; 
    [self.pullView setDelegate:self]; 
    [self.webView.scrollView addSubview:self.pullView];  
    [self.webView.scrollView setDelegate:self]; 
    for (UIView *subview in [self.webView.scrollView subviews]) { 
     subview.userInteractionEnabled = NO; // used to disable copy/paste, etc inside the webview 
    } 
    //[self doYourStuff]; 
} 

//Called when the user pulls to refresh (this is when you should update your data) 
- (void) pullViewShouldRefresh: (SPPullView *) view { 
    [self updateYourStuff]; 
} 

您還可以添加一些邏輯或屬性，以防止用戶縮放，或暫時停用拉視圖，而縮放。

Answer 2

這個作品非常好：http://blog.gomiso.com/2012/03/22/yet-another-pull-to-refresh-library/

Answer 3

我寫了這個代碼，它工作正常。這可能會幫助你。

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    NSString *fullURL = URL you want to hit; 
    NSURL *url = [NSURL URLWithString:fullURL]; 
    NSURLRequest *requestObject = [NSURLRequest requestWithURL:url]; 
    webView.delegate = (id)self; 
    [webView loadRequest:requestObject]; 

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

-(void)handleRefresh:(UIRefreshControl *)refresh { 
    // Reload my data 
    NSString *fullURL = The Url you want to hit; 
    NSURL *url = [NSURL URLWithString:fullURL]; 
    NSURLRequest *requestObject = [NSURLRequest requestWithURL:url]; 
    [webView loadRequest:requestObject]; 
    [refresh endRefreshing]; 
}