uiactivityindicatorview

问题 I have an app that makes web service calls to obtain data. I want to add an activity indicator that is visible when the app is fetching web service data. I have looked into other posts, and though I believe I am doing as the posts recommend, my indicator does not render on the screen. The object that makes the web service call is stateGauges. Here is my code: - (void)viewDidLoad { [super viewDidLoad]; UIActivityIndicatorView *activityStatus = [[UIActivityIndicatorView alloc] initWithFrame

问题 I have a couple of programmatically generated UIButtons (custom, 200 by 200, white background) where i wanted to put a UIActivityIndicatorView inside. I tried it with the following code: UIActivityIndicatorView *playlistImageLoader = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite]; playlistImageLoader.center = CGPointMake(100, 100); playlistImageLoader.hidesWhenStopped = YES; [playlistImage addSubview:playlistImageLoader]; [mainScrollView

问题 My question regards the use of activity indicator in an iPhone project. I have a class that contains an UIActivityIndicatorView @interface StatusView : UIView { UIActivityIndicatorView *indicator; UILabel *textLabel; } - (id)initWithFrame:(CGRect)frame Text:(NSString*)text andShowIndicator:(BOOL)value; In my business logic code I call [indicator startAnimating] and the frame appears at the bottom of the screen. The code also contains a dealloc method that releases the indicator - (void

问题 I am trying to implement a simple spinner while my app seeks data from the Internet. My data grab is working fine, but it sometimes takes a while, so I'd like to use a UIActivityIndicatorView to let the user know that the app hasn't crashed. But it's currently not working. I've gleaned as much as I can from these forums, and others, but for some reason it's not working. Again, I feel like this solution is probably very simple. Here's what I'm doing: I declare the spinner as a property in the

问题 i working on uploading the images through my application.i used the following code -(IBAction)submitimage:(id)sender { // [activity startAnimating]; i started activity here but it starts after completion of function NSString *name, *comments; comments = txtcomment.text; name = @"Anonymous"; int r=random()%10000; NSLog(@"random number:%d",r ); NSString *imageName=[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"dashboard\"; filename=\"%d.jpg\"\r\n",r]; NSData *imageData =

问题 This question already has answers here : Get notification when NSOperationQueue finishes all tasks (13 answers) Closed 4 years ago . How to get completion block of NSOperationQueue, here I want to spin activity indicator from start to end of all operation. NSOperationQueue *operationQueue = [[NSOperationQueue alloc] init]; // Set the max number of concurrent operations (threads) [operationQueue setMaxConcurrentOperationCount:3]; [operationQueue addOperations:@[operation, operation1,

问题 I'm adding activity indicator view before doing some heavy ui updating (pushViewController takes a while to load view). For some reason, indicator view doesn't appear until the new viewController is pushed. (indicator view shows up right before the viewController push animation takes place, although my intention was to show the indicator while a device takes long time before the animation) Should I do something more than adding the indicator view as a subview? I already tried [indicatorView

问题 I have UITableView where each cell has one UIImage and the image is being downloaded from an API using JSON. I handled the initial images and data via Background Threading. However, as user scrolls down inside table view, images to other cells begins to download, so those cells requires some refreshing. I thought about adding an ActivityIndicator inside UIImageView, so user will notice image is being downloaded. Additional info, UIImageView is inside an UIStackView. I thought about isHidden

问题 I'm trying to add a spinning activity indicator (UIActivityIndicatorView) to my app while it parses data from the internet. I have an IBOutlet (spinner) connected to a UIActivityIndicatorView in IB. Initially I had it set up like this: - (void) function { self.spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle: UIActivityIndicatorViewStyleWhite]; self.spinner.hidesWhenStopped = YES; [spinner startAnimating]; //parse data from internet [spinner stopAnimating];} But the

问题 I would like to add an UIActivityIndicatorView (_av object) object into a left bar button item of UINavigationItem My code looks like : UIBarButtonItem * button = [[UIBarButtonItem alloc] initWithCustomView:_av]; [self.navigationItem setLeftBarButtonItem:button]; [button release]; but after I launch the code I take an error: *** Assertion failure in -[UINavigationBar layoutSublayersOfLayer:], /SourceCache/UIKit/UIKit-2380.17/UIView.m:5776 2013-04-15 16:28:39.246 * [12484:907] * Terminating