RACSignal：處理不兼容的塊指針類型

Question

我是新來的無功可可，我想知道，如果有人可以幫我解決這個問題：

下面的代碼片段造成我的麻煩：

[[[self getFormItemAttachmentHeaders:listName 
         topListItemID:form.topListItemID 
           form:form 
] map:^id(NSMutableArray* value) { 
    NSArray* attachmentHeaders = [value copy]; 
    return attachmentHeaders; 
    } 
    ] subscribeNext:^(NSArray* attachmentHeaders) { 
    return [self uploadFormItemAttachments:pendingAttachments 
        attachmentHeaders:attachmentHeaders 
           form:form]; 
    } 
]; 

RACSignal* batchSignal = [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) { 
    [pendingAttachments enumerateObjectsUsingBlock:^(SEFSManagedAttachment* pendingImage, NSUInteger idx, BOOL *stop) { 

下面的代碼行：：該代碼是從在相同的方法中的RACsignal對象定義爲這樣的稱爲

return [self uploadFormItemAttachments:pendingAttachments 
         attachmentHeaders:attachmentHeaders 
            form:form]; 

生成錯誤：

Incompatible block pointer types sending 'RACSignal *(^)(NSArray *__strong)' to parameter of type 'void (^)(__strong id)' 

Answer 1

的原因的錯誤是因爲subscribeNext塊11返回空隙並通過回將生成具有方塊標記的不相容性。