筛选RACSequence不能按预期方式工作

Question

我正在尝试使用ReactiveCocoa刷新对象的提取数组，并且我想筛选出已删除的结果。我似乎无法让事情正常工作 - 我预计filter会在trackSequence中通过每个NSManagedObject，但是我会看到一个_PFBatchFaultingArray对象。

任何人都可以阐明我做错了什么？谢谢！

RACSequence *trackSequence = [documentContextUpdated map:^NSArray *(RACTuple *tuple) { 
    return [DWFAbstractTrack MR_findAllSortedBy:DWFAbstractTrackAttributes.order ascending:YES inContext:tuple.second]; 
}].sequence; 

RAC(self, tracks) = [trackSequence filter:^BOOL(NSManagedObject *managedObject) { 
    return (NO == [managedObject isDeleted]); 
}].signal; 

Answer 1

貌似trackSequence是NSArray的RACSequence S，不NSManagedObject秒。也许你想在-map:的-filter:？

RAC(self, tracks) = [documentContextUpdated map:^NSArray *(RACTuple *tuple) { 
    NSArray *tracks = [DWFAbstractTrack MR_findAllSortedBy:DWFAbstractTrackAttributes.order ascending:YES inContext:tuple.second]; 
    return [tracks.rac_sequence filter:^BOOL(NSManagedObject *managedObject) { 
     return (NO == [managedObject isDeleted]); 
    }].array; 
}];