我有一个名为PickerFilterClass的类，该类可访问YNDropDownView库，并在其中在PickerFilterClass的扩展中创建pickerview。我想要pickerview帮助在另一个名为RestaurantDetails的类中对collectionview进行排序。我正在尝试使用pickerview didselect函数访问名为productCollection的collectionview并在用户pickerview选择一行时重新加载数据。我在这里就是我要这样做的方式：
PickerFilter类
class PickerFilterClass: YNDropDownView {
@IBOutlet var pickerView: UIPickerView!
var rotationAngle: CGFloat!
var filteredProducts = [Product]()
var products = [Product]()
let prodCollection: RestaurantDetails
let sections = [["Burgers", "Fries", "Cola", "Chicken", "Sides"],["Breakfast", "Lunch", "Dinner"]]
override init(frame: CGRect) {
super.init(frame: frame)
self.backgroundColor = UIColor.white
self.initViews()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.initViews()
}
@IBAction func confirmButtonClicked(_ sender: Any) {
self.normalSelected(at: 1)
self.hideMenu()
}
@IBAction func cancelButtonClicked(_ sender: Any) {
// self.changeMenu(title: "Changed", at: 1)
// self.changeMenu(title: "Changed", status: .selected, at: 0)
self.alwaysSelected(at: 1)
// self.alwaysSelected(at: 2)
// self.alwaysSelected(at: 3)
self.hideMenu()
}
override func dropDownViewOpened() {
print("Open Menu")
}
override func dropDownViewClosed() {
print("Close Menu")
}
func initViews() {
}
}
extension PickerFilterClass: UIPickerViewDataSource, UIPickerViewDelegate {
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 2
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return sections[component].count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
pickerView.sizeToFit()
return sections[component][row]
}
func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
let view = UIView()
view.frame = CGRect(x: 10, y: 20, width: 300, height: 52)
let label = UILabel()
label.frame = CGRect(x: 0, y: 0, width: 300, height: 52)
label.textAlignment = .center
label.font = UIFont(name: "Tiny.Toon", size: 11)
label.textColor = UIColor.purple
label.text = sections[component][row]
view.addSubview(label)
// view rotation
// view.transform = CGAffineTransform(rotationAngle: 90 * (.pi/180))
return view
}
我正在尝试使用pickerview在此处访问此集合视图：
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
print(sections[row])
if sections.count > row {
let selectedUsage = sections[component][row].lowercased()
if (selectedUsage == RestaurantDetails.allProductIdentifier.lowercased()) {
filteredProducts = products
} else {
filteredProducts = products.filter { ($0.usage?.lowercased() ?? "") == selectedUsage }
}
self.prodCollection.productCollection.reloadData()
}
}
}