Question

I have the following code that fetches some data from a php script. I m finding that it blocks the interface so that the progress indicator doesn t spin. Is there an easy way to send this to the background so that the UI is free to do whatever it needs? I was under the impression that using blocks would have achieved this but I was obviously wrong (learning Obj-C one step at a time!)

感谢!

NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
                        self.user.username, @"username",
                        self.user.password, @"password",
                        nil];
AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:
                        [NSURL URLWithString:@"http://domain.com"]];

    // Show animated progress indicator, etc    
[self enbleLoadingState:YES];

[client postPath:@"/en/api/login" parameters:params success:^(AFHTTPRequestOperation *operation, id response) {
    [self enbleLoadingState:NO];
    // Do stuff

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    [self enbleLoadingState:NO];
    // Show error
}];

Answer 1

This code should work, the request loads in the background. The problem must be somewhere else. I don t know where the time is spent on the main thread, maybe in enbleLoadingState:? The method starting the request should return immediately. Test this by inserting a NSLog at the start and the end of the method and inside the success-block. The NSLog in the success-block should print out last.

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