活動指標不停止

Question

爲我的下面的代碼，爲什麼我的webview的活動指標不停止？

//this part ok 
    NSURL *theURL = [NSURL URLWithString: Link]; 
    NSURLRequest *request = [NSURLRequest requestWithURL: theURL]; 
UIWebView * webView = [[UIWebView alloc] initWithFrame:CGRectMake(0,0,300,300)]; 
webView.scalesPageToFit = YES; 
[webView setDelegate: self]; 
    [webView loadRequest: request]; 

    /*this part ok*/ 
    UIViewController *newController = [[UIViewController alloc] init]; 
    newController.view = webView; 
    [self.navigationController pushViewController:newController animated:YES ]; 


    //activity indicatior not stoping! 
    CGRect frame = CGRectMake(0.0, 0.0, 25.0, 25.0); 
    activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame:frame]; 
    [activityIndicator startAnimating]; 
     [activityIndicator sizeToFit]; 
    activityIndicator.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin | 
     UIViewAutoresizingFlexibleRightMargin | 
     UIViewAutoresizingFlexibleTopMargin | 
     UIViewAutoresizingFlexibleBottomMargin); 

    UIBarButtonItem *loadingView = [[UIBarButtonItem alloc]   initWithCustomView:activityIndicator]; 
     loadingView.target = newController; 

newController.navigationItem.rightBarButtonItem = loadingView;

Thks提前！ :)

Answer 1

您需要實現UIWebViewDelegate方法：

- (void)webViewDidStartLoad:(UIWebView *)webView { 
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES]; 
    [activityIndicator stopAnimating]; 
} 

- (void)webViewDidFinishLoad:(UIWebView *)webView { 
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO]; 
    [activityIndicator stopAnimating]; 
} 

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error { 
    [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO]; 
    [activityIndicator stopAnimating]; 
} 

Answer 2

你要做的[activityIndicator stopAnimating]，當你希望它停止...