Question

I am using iPhone to get data from my web service.
Because I wan’t to display loading view while getting data I invoke web service synchronous.
I have button which navigate to table view (that get data from ws):

Loading *loading = [[Loading alloc]init];
[[[UIApplication sharedApplication] keyWindow] addSubview:loading.view];

TableViewController *tableViewController = [[TableViewController alloc] init];

[self.navigationController pushViewController:tableViewController animated:YES]; 
[loading.view removeFromSuperview];

And I call web service in viewDidLoad of my view.

webData = [NSURLConnection sendSynchronousRequest:req
                                returningResponse:&response
                                            error:&error]; 

NSString *xml= [[NSString alloc] initWithBytes:[webData mutableBytes] 
                                        length:[webData length] 
                                      encoding:NSUTF8StringEncoding]; 
// Parse XML etc.

I have tried to add loading view before I call web service (in viewDidLoad) but still doesn’t work.
Any idea how to display loading view?

Answer 1

You should call the web service asynchronously. By doing it synchronously, you are blocking the main (UI) thread & it can’t finish loading your view or make it appear (or animate things on the loading view), etc.