Reputation: 409
I have a problem: I used AFNetworking to get data from server, i used NSOperationQueue to add many operation to it, in each request, I added this operation to queue and used waitUntilAllOperationsAreFinished
as bellow :
request 1
...
[queue addOperation:operation1];
[queue waitUntilAllOperationsAreFinished];
request 2
...
[queue addOperation:operation2];
[queue waitUntilAllOperationsAreFinished];
I tried above code and my programs seems hangs and after that, it runs ok.So that I want to added MBProgressHUD to waiting queue finish, then I want to check if queue finish, I want to hide MBProgressHUD. But when i click on Button to load UIViewController, MBProgressHUD cannot show.
HUD = [[MBProgressHUD alloc] initWithView:self.view];
[self.view addSubview:HUD];
HUD.delegate = self;
HUD.labelText = @"Loading";
Actually, I want to show MBProgressHUD when queue finish. How can i do that? Thanks all
Upvotes: 2
Views: 15385
Reputation: 34360
Another Better Approach..
HUD = [[MBProgressHUD alloc] initWithView:self.view];
HUD.labelText = @"Doing funky stuff...";
HUD.detailsLabelText = @"Just relax";
HUD.mode = MBProgressHUDModeAnnularDeterminate;
[self.view addSubview:HUD];
[HUD showWhileExecuting:@selector(doSomeFunkyStuff) onTarget:self withObject:nil animated:YES];
And doSomeFunkyStuff
- (void)doSomeFunkyStuff {
float progress = 0.0;
while (progress < 1.0) {
progress += 0.01;
HUD.progress = progress;
usleep(50000);
}
}
Detail answer is here..
Upvotes: 3
Reputation: 10195
waitUntilAllOperationsAreFinished
will bock the current thread, which is probably the main thread so you really don't want to do that.
If you're using AFNetworking then check out this method on AFHTTPClient
- (void)enqueueBatchOfHTTPRequestOperations:(NSArray *)operations
progressBlock:(void (^)(NSUInteger numberOfFinishedOperations, NSUInteger totalNumberOfOperations))progressBlock
completionBlock:(void (^)(NSArray *operations))completionBlock;
So show you HUD then call this method and hide your HUD in the completionBlock
Upvotes: 2
Reputation: 9091
Shortly you can do it like this:
[MBProgressHUD showHUDAddedTo:self.view animated:YES];
[MBProgressHUD hideHUDForView:self.view animated:YES];
Check MBProgressHUD
's usage
Upvotes: 12