ASIHTTPRequest Issue With NSNotificationCenter

Question

I download Images Using ASIHTTPRequest. I wrote This Code:

+(void)GetImagesURL
{
    NSLog(@"%i",[TripsArray count]);
    for (int i=0;i< [TripsArray count]; i++) 
    {

        NSURL *DetailTripURL = [NSURL URLWithString:[[TripsArray objectAtIndex:i] TripURL]];
        __block ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:DetailTripURL];
        [request setCompletionBlock:^{
            NSData *TripHTMLData = [request responseData];
            NSLog(@"url :  %@",DetailTripURL);
            [[TripsArray objectAtIndex:i] setTripData:TripHTMLData];
            //NSLog(@"%@",DetailTripHTMLData);
            // 2
            TFHpple *DetailTripParser = [TFHpple hppleWithHTMLData:TripHTMLData];

            // Get Image
            NSString *ImageTripXpathQueryString = @"//div[@class='image_container']/img";
            NSArray *ImageTripNodes = [DetailTripParser searchWithXPathQuery:ImageTripXpathQueryString];
            NSLog(@"%i",[ImageTripNodes count]);
            for (int j=0 ;j<[ImageTripNodes count]; j++)
            {
                [[TripsArray objectAtIndex:i] setImageUrl:[[ImageTripNodes objectAtIndex:j] objectForKey:@"src"]];
                NSLog(@"%@",[[ImageTripNodes objectAtIndex:j] objectForKey:@"src"]);
            }


        }];
        [request setFailedBlock:^{
            NSError *error = [request error];
            NSLog(@"Get Image URL Failed %@", error.localizedDescription);
        }];

        [request startAsynchronous];        
    }
        [[NSNotificationCenter defaultCenter] postNotificationName:@"Get Images URL Success" object:self];
}

i want postNotificationName To Call Another Function .

The Problem is NSNotificationCenter, not postNotificationName . Any Help Please ?

Please write something about where you think your error lies, what your code is supposed to do and any other relevant info — The Unfun Cat, Nov 13 '12 at 19:21
i have Trips Array with Images URL I wanna Get Image URL By Parsing HTML Page Using TFHpple In Asynchronous Way and i wanna if i get All Images Download PostNotificationCenter — Tefa, Nov 13 '12 at 19:27
Is there an object that has added itself as an NSNotificationCenter observer for notifications named `"Get Images URL Success"`? — Craig Otis, Nov 13 '12 at 19:30

score 0 · Answer 1 · answered Nov 13 '12 at 19:33

0

First, you need to add an observer Get_Images_URL_Success

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(gotMessages:) name:Get_Images_URL_Success object:nil];

When you postNotificationName in +GetImagesURL method, this will be called

- (void)gotMessages:(id)sender {
    NSLog(@"This will be called after the postNotificationName");
}

it is recommended you removeObserver when not needed (for example, in dealloc)

[[NSNotificationCenter defaultCenter] removeObserver:self name:Get_Images_URL_Success object:nil];

Now when you postNotificationName like this, gotMessages method should be called

[[NSNotificationCenter defaultCenter] postNotificationName:Get_Images_URL_Success object:self];

[super easy, isn't it?]

answered Nov 13 '12 at 19:33

Warif Akhand Rishi

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This What I do Warif But Not Call GotMessage ? – Tefa Nov 13 '12 at 19:38
You are posting a notification Get_Images_URL_Success. and gotMessages will fire every time you post notification with Get_Images_URL_Success. – Warif Akhand Rishi Nov 13 '12 at 19:52
can i Call GotMessages With Argument Int ? – Tefa Nov 13 '12 at 19:59
yes. But you need to use NSNumber instead of integer. You can use string directly. – Warif Akhand Rishi Nov 13 '12 at 20:10
please can you write how can i call method with argument type NSNumber ? – Tefa Nov 13 '12 at 20:11

ASIHTTPRequest Issue With NSNotificationCenter

1 Answers1