UIActivityIndicatorView+AFNetworking或UIProgressView+AFNetworking

Question

你能帮我理解一下如何使用UIActivityIndicatorView+AFNetworking或UIProgressView+AFNetworking吗？我是否需要再创建一个UIViewController，如果需要，我需要在哪里实现它？我发现我需要使用setProgressWithUploadProgressOfOperation或setAnimatingWithStateOfOperation，但我仍然需要一个例子。

我的代码是：

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFJSONResponseSerializer serializer];
[manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[manager.requestSerializer setValue:@"" forHTTPHeaderField:@""];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
[manager GET:@"blablabla" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {

    // 3
    //[self.view setAnimatingWithStateOfOperation:operation];
    NSLog(@"JSON: %@", responseObject);
    NSArray *carsList = responseObject[@"data"];
    [self showStream:carsList];

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {

    // 4
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error"
                                                        message:[error localizedDescription]
                                                       delegate:nil
                                              cancelButtonTitle:@"Ok"
                                              otherButtonTitles:nil];
    [alertView show];
}];

Answer 1

我想，您希望在加载操作时显示UIActivityIndicator。所以你必须这样做：

// your code

AFHTTPRequestOperation *operation = [manager GET:@"blablabla" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    // even more code
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    // and here
}];

UIActivityIndicatorView *indicatorView = [[UIActivityIndicatorView alloc] init];
indicatorView.frame = /*calculate frame here*/;
[self.view addSubView:indicatorView];
[indicatorView setAnimatingWithStateOfOperation:operation];