uiactivityindicatorview

问题 I am downloading an mp3 using NSData dataWithContentsOfURL:url. This takes a while and while the file is downloading the application hangs. I want to handle well and ideal would like to show the download progress but can't find methods for this. It is in a UIViewController and I have made a first attempt by putting in a UIActivityIndicatorView and start it spinning before I start the download, then stop it spinning after but nothing appears. So my question really is please could someone tell

问题 This question already has answers here : Alert view is showing white rectangle in iOS7 (3 answers) Closed 6 years ago . I need to UIActivityIndicatorView in UIAlertView when loading. But UIActivityIndicatorView is not displaying when I add this with UIActivityIndicatorView not displaying in UIAlertView - iOS7 in iOS 7 . And this is working good in iOS 6 & lowest versions. Below is my code. Is there any solution ? . thanks. UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:nil message

问题 I am using this library https://github.com/ninjaprox/NVActivityIndicatorView for showing the loading indicator. By default it blocks the entire view controller but how can I show the activity indicator only for the particular view. For example if a view controller contains a webview and some other view, the activity indicator should be only for the webview and I should be able interact with the other view. class FaqViewController: UIViewController, UIWebViewDelegate { @IBOutlet var faqWebView

问题 I have a UIBarButtonItem called "Refresh Data". When user clicks it, the app should refresh its data. What happens on that button click is web services are launched and xml data is brought and they are of the order 30000-40000 records. So to prevent UI from hanging i wrote a background thread and did that loading there. - (void)refreshDataAction { NSLog(@"Refresh Data"); //Put up an alert box indicating user to wait while data is loading. UIAlertView *alert = [[UIAlertView alloc]

问题 I created a custom cell with a hidden spinner and hidden text "Load More". These fields are unhidden for the last cell so that the user can click it to request more data. I have it woking so that when the user clicks the last cell the spinner starts, but when the user scrolls the cell out of view and back again the spinner is not shown. Any help will be appreciated.:) I have a custom cell that is a subclass of UITableViewCell: @interface BrowseListCell : UITableViewCell{ IBOutlet UIImageView

问题 I have implemented a UIActivityIndicator that shows up in one part of my program but not another. I have the activity indicator come up while i am loading a table, however, i am trying to get it to start animating again after the user has clicked a button and is waiting for the table to reload. The table reloads, but no indicator. Here is the code. - (void)viewWillAppear:(BOOL)animated { CGRect frame = CGRectMake (120.0, 185.0, 80, 80); activity = [[UIActivityIndicatorView alloc]

问题 I currently starting the activity indicator before pushing another view controller but it is not start animating the activity indicator. [activityindicator startanimating]; [self.navigationcontroller pushviewcontroller:viewcontroller animated:YES]; [activityindicator stopanimating]; 回答1: Create a NSThread as call a selector as follows : [NSThread detachNewThreadSelector:@selector(threadStartAnimating:) toTarget:self withObject:nil]; // Some code [spinner stopAnimating]; [self

问题 How would I go about showing an activity Indicator and a white background while the data in my collectionView loads? I currently have this: let activityView = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge) override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) self.view.addSubview(activityView) activityView.hidesWhenStopped = true activityView.center = self.view.center activityView.startAnimating() DispatchQueue.global(qos: DispatchQoS.QoSClass.background)

问题 I have an annoying problem with displaying UITableViewCell with UIActivityIndicatorView inside. My tableView delegate loads portions of data. The last cell always indicates loading process while new portion is not loaded. Loading starts in tableView: willDisplayCell: forRowAtIndexPath: .So in iOS 5 (or iOS 5 simulator) it works perfectly, but in iOS 6 (or iOS 6 simulator) UIActivityIndicatorView displays only for the first time. Maybe something was deprecated since iOS 6 or it's iOS 6 bug?

问题 I'm playing with some JSON parsing in iOS and i wanted to add a spinner, this works wel but i can't stop the spinner and i would like to understand why. [spinner stopAnimating] is called in the async block and i believe thats where the problem is, maybe because i can't call the method on spinner in the block? i've logged the spinner obj and the output is: <UIActivityIndicatorView: 0x76905f0; frame = (150 230; 20 20); layer = <CALayer: 0x768ffb0>> Maybe somebody can make me understand how to