UI Slider 显示字符串数组

Question

我有一个 UISlider 和一个要在 UILabel 中显示的字符串数组。尝试设置 minimumValue 和 maximumValue 时出现此错误 无法将“String”类型的值分配给“Float”

我是 swift 新手，我为 Ints 制作了一个滑块，但从未为 Strings 制作过滑块。

import UIKit


class PostTableViewController: UITableViewController, UINavigationControllerDelegate {

    @IBOutlet weak var ageSlider: UISlider!
    @IBOutlet weak var ageSliderLabel: UILabel!

     var ageArray = ["6 weeks", "7 weeks", "8 weeks", "9 weeks", "10 weeks", "11 weeks", "12 weeks", "13 weeks", "14 weeks", "15 weeks", "16 weeks", "17 weeks", "18 weeks", "19 weeks", "20 weeks", "21 weeks","22 weeks","23 weeks","24 weeks","25 weeks","26 weeks","27 weeks","28 weeks","29 weeks","30 weeks",]





        override func viewDidLoad() {
            super.viewDidLoad()
            let tapGesture = UITapGestureRecognizer(target: view, action: #selector(UIView.endEditing))
            view.addGestureRecognizer(tapGesture)


        }


        // MARK:Table view data source
        override func numberOfSections(in tableView: UITableView) -> Int {
            return 6
        }

        override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
            return 1
        }
        func ageSliderInterval(){
            ageSlider.minimumValue = String("")// This is where i get the error
            ageSlider.maximumValue = String(ageArray.count)// This is where i get the error
            ageSlider.isContinuous = false
        }
        @IBAction func ageSlider(_ sender: Any) {

        }
        }

Answer 1

你可以试试这个，

滑块的最大值和最小值是浮点类型而不是字符串

ageSlider.minimumValue = 0 
ageSlider.maximumValue = ageArray.count

和

@IBAction func ageSlider(_ sender: Any) {

    let currentValue = Int(sender.value)
    ageSliderLabel.text = ageArray[currentValue]
}

Answer 2

你可以试试

ageSlider.minimumValue = 0  // check even if it's the defailt 
ageSlider.maximumValue =  geArray.count 

并更改此函数名称

@IBAction func ageSlider(_ sender: Any) {

因为它与变量名混淆