使用 UISlider 的起始值问题 [英] Troubles with starting value using UISlider

问题描述

开始处理应用程序.有以下问题，在 Main.storyboard 中为滑块设置了当前值(顶部为 1.5 分之 3，底部为 100 分之 200)，因此，

第二个滑块的属性:

解决方案

是的，是 Xcode 问题.您可以从此链接找到问题列表.(https://fahimfarook.medium.com/xcode-12-and-ios-14-developer-bugs-and-issues-ada35920a104).

通过编码创建滑块和设置值的出口.

@IBOutlet 弱变量 firstSlider:UISlider！@IBOutlet 弱变量 secondSlider:UISlider！覆盖 func viewDidLoad() {super.viewDidLoad()firstSlider.minimumValue = 0firstSlider.maximumValue = 3firstSlider.value = 1.5secondSlider.minimumValue = 0secondSlider.maximumValue = 200secondSlider.value = 100}

Started working on the application. There was the following problem, in Main.storyboard the current value is set for the slider (for the top one it is 1.5 out of 3, and for the bottom one it is 100 out of 200), therefore, in the screenshot, I should have points on the slider track in the middle. I started googling about it, I can't find anything. Xcode 12 problem maybe? If not, please help me write the correct search query. I will be very grateful. Sorry for my bad English. :)

Here ViewController:

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var heightLabel: UILabel!
    @IBOutlet weak var weightLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

    }
    
    @IBAction func heightSliderChanged(_ sender: UISlider) {
        print(sender.value)
        heightLabel.text = String(format: "%.2f", sender.value) + "m"
    }

    @IBAction func weightSliderChanged(_ sender: UISlider) {
        weightLabel.text = String(format: "%.0f", sender.value) + "Kg"
    }
    
}

Property's for first slider:

Property's for second slider:

解决方案

Yes, it's Xcode issues. You can find the issues list from this link. (https://fahimfarook.medium.com/xcode-12-and-ios-14-developer-bugs-and-issues-ada35920a104).

Create an outlet of both slider and set value through coding.

@IBOutlet weak var firstSlider: UISlider!
@IBOutlet weak var secondSlider: UISlider!

override func viewDidLoad() {
    super.viewDidLoad()
    
    firstSlider.minimumValue = 0
    firstSlider.maximumValue = 3
    firstSlider.value = 1.5
    
    secondSlider.minimumValue = 0
    secondSlider.maximumValue = 200
    secondSlider.value = 100
}

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