ios - 如何修复条件绑定(bind)的可选类型不是 'Bool'？

Question

我该如何解决这个问题？

我在 10 个不同的地方遇到了同样的错误，我一直在对其进行测试，但似乎无法理解这一点

提前感谢你们提供的任何帮助，这对我来说真的很重要

条件绑定(bind)的初始化器必须是 Optional 类型，而不是“Bool”

extension HomeController: FiltersViewControllerDelegate{
    func query(withCategory jewelry: Bool, shoe: Bool, hat: Bool, apearel: Bool, gear: Bool) -> Query {

        if jewelry == false && shoe == false && hat == false && apearel == false && gear == false {
            stackViewHeightConstraint.constant = 0
            activeFiltersStackView.isHidden = true
        } else {
            stackViewHeightConstraint.constant = 44
            activeFiltersStackView.isHidden = false
        }

        var filtered = baseQuery

        // Sort and Filter data
        if let jewelry = jewelry, !jewelry.isEmpty {                      //Error
            filtered = filtered.whereField("category", isEqualTo: jewelry)
        }
        //......more Filters....\\

        if let gear = gear, !gear.isEmpty {                               //Error
            filtered = filtered.whereField("category", isEqualTo: gear)
        }

        return filtered
    }

    func controller(_ controller: FilterViewController,
                      didSelectCategory jewelry: Bool,
                      shoe: Bool,
                      hat: Bool,
                      apearel: Bool,
                      gear: Bool) {

        if jewelry == false && shoe == false && hat == false && apearel == false && gear == false {
            stackViewHeightConstraint.constant = 0
            activeFiltersStackView.isHidden = true
        } else {
            stackViewHeightConstraint.constant = 44
            activeFiltersStackView.isHidden = false
        }

        let filtered = query(withCategory: jewelry, shoe: shoe, hat: hat, apearel: apearel, gear: gear)


        if let jewelry = jewelry, ! jewelry.isEmpty {                //Error
            jewelryFilterLbl.text = "Jewelry"
            jewelryFilterLbl.isHidden = false
        } else {
            jewelryFilterLbl.isHidden = true
        }

        //......more Filters....\\

        if let gear = gear, !gear.isEmpty {                          //Error
            gearFilterLbl.text = "gear"
            gearFilterLbl.isHidden = false
        } else {
            gearFilterLbl.isHidden = true
        }

        query = filtered
    }

}

Answer 1

删除 .isEmpty 检查它不是 Bool 的属性

    if jewelry {                      //Error
        filtered = filtered.whereField("category", isEqualTo: jewelry)
    }
    //......more Filters....\\

    if gear {                               //Error
        filtered = filtered.whereField("category", isEqualTo: gear)
    }