Integrating MBProgressHUD with two classes - ios

Question

Im am trying to properly integrate MBProgressHUD in a project while i am downloading and processing some data. Forgive me my ignorance if i am asking stupid things, but i'm a complete noob...
I have a "Data" class that is handling my HTTPRequests, so i thing here is the proper place to put some stuff in:
-(void)resolve
{
// Create the request.
NSURLRequest *theRequest=[NSURLRequest requestWithURL:[[NSURL alloc] initWithString:[self url]]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
NSLog(#"Resolving content from: %#",[self url]);
// create the connection with the request
// and start loading the data
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if (theConnection) {
// Create the NSMutableData to hold the received data.
// receivedData is an instance variable declared elsewhere.
receivedData = [[NSMutableData data] retain];
} else {
NSLog(#"Content - resolve: connection failed");
}
// Here is the part that it makes me crazy...
HUD = [[MBProgressHUD showHUDAddedTo:self.view animated:YES] retain];
return;
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
// This method is called when the server has determined that it
// has enough information to create the NSURLResponse.
// It can be called multiple times, for example in the case of a
// redirect, so each time we reset the data.
// receivedData is an instance variable declared elsewhere.
expectedLength = [response expectedContentLength];
currentLength = 0;
HUD.mode = MBProgressHUDModeDeterminate;
[receivedData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
currentLength += [data length];
HUD.progress = currentLength / (float)expectedLength;
// Append the new data to receivedData.
// receivedData is an instance variable declared elsewhere.
[receivedData appendData:data];
return;
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
[HUD hide:YES];
// release the connection, and the data object
[connection release];
// receivedData is declared as a method instance elsewhere
[receivedData release];
// inform the user
NSLog(#"Content - Connection failed! Error - %# %#",
[error localizedDescription],
[[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
return;
}
Now i know that putting the "showHUDaddedTo" in the -(void)resolve is not the right way...
I am calling this data function from a view controller with an IBaction like this:
-(IBAction) btnClicked:(id) sender {
if ([[issue status] intValue] == 1 ) // issue is not downloaded
{
[(Content *)[issue content] resolve];
//HUD = [[MBProgressHUD showHUDAddedTo:self.navigationController.view animated:YES] retain];
}
else // issue is downloaded - needs to be archived
{
NSError * error = nil;
[[NSFileManager defaultManager] removeItemAtPath:[(Content *)[issue content] path] error:&error];
if (error) {
// implement error handling
}
else {
Content * c = (Content *)[issue content];
[c setPath:#""];
[issue setStatus:[NSNumber numberWithInt:1]];
[buttonView setTitle:#"Download" forState:UIControlStateNormal];
[gotoIssue setTitle:#"..." forState:UIControlStateNormal];
// notify all interested parties of the archived content
[[NSNotificationCenter defaultCenter] postNotificationName:#"contentArchived" object:self]; // make sure its persisted!
}
}
}
Simply said: i would like to call all the MBProgressHUD stuff from my Conten.m file in the moment i push the download button in my IssueController.m file. I think you see now where my problem is: i am not a coder ;-) Any help is appreciated.
Cheers,
sandor

Answer 1

I would try and use the HUD method showWhileExecuting. Wrap your calls up in a new method and call that to download your information. When your method finishes, so will your HUD.
Also, is there a reason why you are retaining your calls for the HUD? I have not seen that before and I'm not sure if you need to retain those as they are autoreleased.