Question

我是新手，现在我正尝试使用cocoapods在情节提要上创建一个下拉表。我遵循了cocoapods的所有教程，我猜这里的代码有问题。请在这里给我一个启发，为什么在我声明下拉菜单的地方它不起作用。

感谢您的帮助，谢谢。

import iOSDropDown

class ViewController: UIViewController {

    @IBOutlet weak var DropDownMenu: DropDown!
    let dropDown = DropDown()
    let view = UIView()
    dropDown.anchorView = view
    dropDown.optionArray = ["option 1", "option 2", "option 3"]

Answer 1

override func viewDidLoad() {

    super.viewDidLoad()

    let dropDown = DropDown()
    let view = UIView()
    dropDown.anchorView = view // UIView or UIButton

    // For set direction .top, .bottom or .any(for automatic)
    dropDown.direction = .any 
    dropDown.optionArray = ["data 1", "data 2", "data 3"]

    // for custom cell you can set xib
    dropDown.cellNib = UINib(nibName: "MyCell", bundle: nil)

    // select item from dropdown
    dropDown.selectionAction = { [unowned self] (index: Int, item: String) in
       print("Selected item: \(item) at index: \(index)")
   }
   // if you want to set custom width then you can set.
   dropDownLeft.width = 200

   dropDown.show() // For Display Dropdown
   dropDown.hide() // For hide Dropdown
}

有关更多详细信息和功能，您可以参考https://github.com/AssistoLab/DropDown

Answer 2

import iOSDropDown

class ViewController: UIViewController,UITextFieldDelegate {

@IBOutlet weak var dropDown: DropDown!

override func viewDidLoad() {
    super.viewDidLoad()

    // The list of array to display. Can be changed dynamically
    dropDown.optionArray = ["Option 1", "Option 2", "Option 3"]
    //Its Id Values and its optional
    dropDown.optionIds = [1,23,54,22]

    // The the Closure returns Selected Index and String
    dropDown.didSelect{(selectedText , index ,id) in
    print("Selected String: \(selectedText) \n index: \(index)")
        self.dropDown.hideList()
        self.dropDown.text = selectedText
    }
}

}

func textFieldDidBeginEditing(_ textField: UITextField) {
            dropDown.showList()
}

}

您可以引用此链接https://cocoapods.org/pods/iOSDropDown

Answer 3

在viewDidLoad中写入初始化代码：

override func viewDidLoad() {
    super.viewDidLoad()

    let dropDown = DropDown()
    let view = UIView()
    dropDown.anchorView = view
    dropDown.optionArray = ["option 1", "option 2", "option 3"]
}

使用Cocoapods错误的Swift DropDown，将不起作用

3 个答案: