调用中缺少参数 'dictionary' 的参数

Question

这是我用来填充 collectionView 单元格的 NSObject class 文件。我正在从 firebase 获取我的数据并用它填充 collectionViewCell。 Xcode 出现此错误 "Missing argument for parameter 'dictionary' in call" 我已尽我所能，但我无法弄清楚缺少什么。是什么导致了这个错误，我该如何解决？

class BusinessCategory: NSObject {

var ref: FIRDatabaseReference!
var name: String?
var logo: String?
var featurebusiness: [SampleBusinesses]?
var type: String?
init(dictionary: [String: Any]) {
    self.name = dictionary["BusinessName"] as? String ?? ""
    self.logo = dictionary["logo"] as? String ?? ""
}


static func sampleBusinessCategories() -> [BusinessCategory] {

    var FinancialInstitutionCatergory = BusinessCategory()
    FinancialInstitutionCatergory.name = "Financial Institutions"
    var featurebusiness = [SampleBusinesses]()
    //logic


    FIRDatabase.database().reference().child("BusinessCategories/Banks").observeSingleEvent(of: .childAdded, with: { (snapshot) in

        if let dictionary = snapshot.value as? [String: AnyObject] {
             let financeApp = SampleBusinesses()
             financeApp.setValuesForKeys(dictionary)
            financeApp.name = dictionary["BusinessName"] as? String

            featurebusiness.append(financeApp)
        }
        FinancialInstitutionCatergory.featurebusiness = featurebusiness

        print(snapshot)

    }, withCancel: nil)

    return [FinancialInstitutionCatergory]

}
}

Answer 1

错误说明您需要在任何有错误的行中包含 dictionary 参数；示例可能如下所示：

var FinancialInstitutionCatergory = BusinessCategory(dictionary: [String : Any])

不清楚你的代码是哪一行出错了；您需要在某处包含参数。

调用中缺少参数 'dictionary' 的参数

Missing argument for parameter 'dictionary' in call

dictionary

nsobject

firebase

swift

firebase-realtime-database