ios - AFNetworking：已取消，无请求

Question

愚蠢的问题。我只是将示例 AFNetworking 代码粘贴到：

NSURL *url = [NSURL URLWithString:@"https://gowalla.com/users/mattt.json"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];

AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
    NSLog(@"Name: %@ %@", [JSON valueForKeyPath:@"first_name"], [JSON valueForKeyPath:@"last_name"]);
} failure:nil];

[operation start];

但是，什么也没有发生。如果我向 NSLog 输出操作，看起来请求已被取消：

<AFJSONRequestOperation: 0x81655f0, state: isExecuting, cancelled: NO request: <NSURLRequest https://gowalla.com/users/mattt.json>, response: (null)>

我究竟做错了什么？

Answer 1

您最好的选择是添加一个失败块，然后检查其中提供的变量

NSURL *url = [NSURL URLWithString:@"https://gowalla.com/users/mattt.json"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];

AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
    NSLog(@"Name: %@ %@", [JSON valueForKeyPath:@"first_name"], [JSON valueForKeyPath:@"last_name"]);
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
    NSLog(@"%@", [error localizedDescription]);
}];

[operation start];