ios - block 无法导入嵌套 block

Question

我在一个方法中有这段代码:

- (NetworkOperation *)runOperationWithPath:(NSString *)path

                                           params:(NSDictionary *)params

                                       httpMethod:(NSString *)httpMethod

                                completionHandler:(DictionaryCompletionHandler)completionHandler;

{
    NetworkOperation *op = (NetworkOperation *)[self operationWithPath:path

                                                                              params:[params mutableCopy]

                                                                          httpMethod:httpMethod

                                                                                 ssl:YES];


    [op addCompletionHandler:^(NetworkOperation *completedOperation) {        
        NSData *responseData = [completedOperation responseData];

        NSError *error;

        NSDictionary *returnDict = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:&error];

        if(error == nil && !self.timedOut) {
            completionHandler(returnDict, nil);
        } else {
            completionHandler(nil, error);
        }
    } errorHandler:^(NetworkOperation *completedOperation, NSError *error) {
        //Manage error
    }];



    [self enqueueOperation:op];



    return op;

}

我正在为它创建单元测试，我发现了这种奇怪的行为。在单元测试中，我使用 OHHTTPStubs 来 stub 网络响应。单元测试的代码在这里

- (void)testThatTheRequestRunAndCallsTheCompletationBlock; {
    //Here i have the setup of OHHTTPStubs to stub the responses.

    __block BOOL called = NO;

    [self.restClient runOperationWithPath:@"Rest/clientTest" params:nil httpMethod:@"POST" authenticationEngine:nil completionHandler:^(NSDictionary *result, NSError *error) {
        called = YES;

    }];

    while (CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, true) && !blockFinished)  

    STAssertTrue(called, @"The completation block should be called");

}

如果我运行单个单元测试一切正常，如果我运行整套单元测试应用程序崩溃调用 completationHandler 为 nil。我不明白，因为在第一种情况下(单次运行)嵌套 block 被正确复制，当我运行整个测试套件时嵌套 block 没有被容器 block 正确捕获。

我尝试删除 OHHTTPStubs 并阻止等待代码，但没有任何变化。关于如何调试它的一些想法？

Answer 1

错别字:

- (void)testThatTheRequestRunAndCallsTheCompletationBlock; {
//                                                       ^