ios - 在不使用 alpha 的情况下使用 UISegmentedControl 在 View ios 之间切换？

Question

我有 UISegmentedControl，我用它来在 2 个 UI View 之间切换，但我的 View 有问题，使应用程序与 Web APIs 聊天。每个 View 将调用其 API 为每个 View 带来数据。我想让应用程序父 View 加载每个 View ，而没有子用户 alpha

import UIKit

class UsersGroupsViewController: UIViewController {

        @IBOutlet weak var usersView:UIView!
        @IBOutlet weak var groupView:UIView!

        @IBOutlet weak var segmentedControlViews: UISegmentedControl!

        override func viewDidLoad() {
            super.viewDidLoad()

            // Do any additional setup after loading the view.

            let font = UIFont.systemFont(ofSize: 15)
            segmentedControlViews.setTitleTextAttributes([NSAttributedString.Key.font: font], for: .normal)
        }

        @IBAction func switchViews(_ sender: UISegmentedControl) {
            if sender.selectedSegmentIndex == 0 {
                usersView.alpha = 1
                groupView.alpha = 0
            } else {
                usersView.alpha = 0
                groupView.alpha = 1
            }
        }
}

Answer 1

而不是使用 alpha 使用 isHidden

@IBOutlet weak var segmentedControlViews: UISegmentedControl!
@IBOutlet weak var usersView: UIView!
@IBOutlet weak var groupView: UIView!

@IBAction func indexChanged(_ sender: UISegmentedControl) {
    switch sender.selectedSegmentIndex {
    case 0:
        usersView.isHidden = true
        groupView.isHidden = false
    case 1:
        usersView.isHidden = false
        groupView.isHidden = true
    default:
        break
}