CODEWITHSUNDEEP
iosobjective-cuiactivityindicatorview
user6631314
user6631314

Reputation: 1960

IOS/Objective-C: Methods to start and end uiactivityindicatorview

I am trying to create methods that I can reuse to start and stop spinning wheels during different lengthy activities such as syncing a table with a server.

My start method:

-(void) startSpinner {
    UIActivityIndicatorView *activityIndicator;

    activityIndicator = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
    activityIndicator.frame = CGRectMake(0.0, 0.0, 40.0, 40.0);
    activityIndicator.center = self.view.center;
    [self.view addSubview: activityIndicator];

    [activityIndicator startAnimating];
    }

and end method

-(void)endSpinner:(UIActivityIndicatorView *) spinner forTable:(UITableView *)tableView {
    [tableView reloadData];
    [spinner stopAnimating];
    tableView.userInteractionEnabled = YES;
}

The problem I'm running into is the end method does not recognize the uiactivityidicator created in the start method.

Should I be saving this in a property? Or how can I grab the spinner from a different method in order to save it.

I'd like to set this up in reusable code as I have many tableviews in different view controllers where I would like to include this code. The tableviews already have properties but do I have to set up a uiactivityindicator property in every view controller where I want to include a spinner?

Thanks for any insights.

Upvotes: 1

Views: 1132

Answers (1)

Teja Nandamuri
Teja Nandamuri

Reputation: 11201

Declare a property in AppDelegate:

   @property (strong,nonatomic) MyActivityIndicator *activity;

and initialise it:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    _activity=[[MyActivityIndicator alloc]init];
}

and then declare the following methods in appDelegate:

- (void)showActivity
{
    dispatch_async(dispatch_get_main_queue(), ^{
        [_window addSubview:_activity];
        [_activity startAnimating];
    });

}

- (void)hideActivity
{
    dispatch_async(dispatch_get_main_queue(), ^{
        //also remove activity from window
        [_activity stopAnimating];
    });
}

you can call these two methods from any class:

  [(AppDelegate*)[UIApplication sharedApplication].delegate showActivity];

Upvotes: 2

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