iOS刪除所有活動指標

我的活動指標存在問題。我有一個按鈕，可以在活動指示器之間重新加載網站和顯示器。問題在於，如果用戶在按鈕上點擊超過1次，它將重建一個新指標，並且該指標始終在屏幕上凍結。按鈕禁用不起作用。有沒有人解決這個問題。請幫忙。iOS刪除所有活動指標

這裏是我的代碼：

-(IBAction) buttonReload { 
Reachability *r = [Reachability reachabilityWithHostName:@"www.google.com"]; 
NetworkStatus internetStatus = [r currentReachabilityStatus];  
if ((internetStatus != ReachableViaWiFi) && (internetStatus != ReachableViaWWAN)){ 

    UIAlertView *myAlert = [[UIAlertView alloc] 
          initWithTitle:@"No Inet!" message:@"You need a Inet Connection..." 
          delegate:self 
          cancelButtonTitle:@"Ok" 
          otherButtonTitles:nil]; 
    [myAlert show]; 
    [myAlert release]; 
} 

else 
{ 

    //Website loading 
    [self performSelector: @selector(doLoadWebsite) 
       withObject: nil 
       afterDelay: 0]; 
    return; 
} 
} 

- (void) doLoadWebsite 
{ 

//add activity indicator 
NewsActivity = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(140.0f, 180.0f, 40.0f, 40.0f)]; 
[NewsActivity setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleGray]; 
[self.view addSubview: NewsActivity]; 
[NewsActivity startAnimating]; 

[NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(finishActivity) userInfo:nil repeats:YES]; 
//NewsActivity.backgroundColor = [UIColor grayColor]; 
NewsActivity.hidesWhenStopped = YES; 
// Show Status Bar network indicator 
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES; 

//perform time-consuming tasks 
//load News Website 
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.google.com"]]]; 
} 


-(void) finishActivity { 

if (!webView.loading) { 
    [self.NewsActivity removeFromSuperview]; 
    [NewsActivity stopAnimating]; 

    //Hide network activity indicator 
    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; 
} 
else { 
    [NewsActivity startAnimating]; 
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; 
} 


}

來源

2011-09-22 CaspervanDoorn

一旦加載頁面，則應該執行stopAnimating，removeFromSuperView。如果用戶再次刷新頁面，則可以再次將其添加到subView和startAnimating。

來源

2011-09-22 14:32:19 Legolas

你能給一點樣品嗎？如果我用[NewsActivity removeFromSuperview]嘗試它;指示器將永遠不會顯示。 – CaspervanDoorn

是的，再次將它添加到子視圖:) – Legolas

它不起作用。其他指標將一次又一次地顯示在循環中...... – CaspervanDoorn

iOS刪除所有活動指標

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