ios – 如何用可空写入完成块？

CRASH

[KPTaxnoteApiSaveHandler saveEntryWithUuid:uuid completion:nil];

好

[KPTaxnoteApiSaveHandler saveEntryWithUuid:uuid completion:^(NSError *error) {}];

这是代码.

+ (void)saveEntryWithUuid:(NSString *)uuid completion:(void (^ __nullablE)(NSError * _Nullable error))completion {

    NSLog(@"saveEntryWithUuid");

    Entry *entry = [Entry MR_findFirstByAttribute:@"uuid" withValue:uuid];

    NSDictionary *params = @{@"entrY[uuid]":entry.uuiD};

    [KPTaxnoteApiSaveHandler postWithUrl:kApiUrlStringForEntry params:params completion:^(NSError *error) {

        if (!error) {

            [MagicalRecord saveWithBlock:^(NsmanagedObjectContext *localContext) {

                Entry *entry    = [Entry MR_findFirstByAttribute:@"uuid" withValue:uuid inContext:localContext];
                entry.needSave  = @NO;
            }];
        }

        completion(error);
    }];

+ (void)postWithUrl:(NSString *)urlStr params:(NSDictionary *)params completion:(nullable void (^)(NSError *_Nullable error))completion {

    AFhttprequestOperationManager *manager = [AFhttprequestOperationManager manager];

    [manager POST:urlStr parameters:params success:^(AFhttprequestOperation *operation,id responSEObject) {

        completion(nil);

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

        completion(error);
    }];