Swift - Segmented control - Switch multiple views

问题

Until now I still can't figure how to switch multiple views in one view controller. My storyboard is like this one.

Right now I want to embed two views inside my view controller.

My code for segmented control to switch two views in one view controller so far.

import UIKit

class PopularHistoryViewController: UIViewController {

    @IBOutlet weak var segmentedControl: UISegmentedControl!

    @IBAction func indexChanged(sender: UISegmentedControl) {
        switch segmentedControl.selectedSegmentIndex
        {
        case 0:
            NSLog("Popular selected")
            //show popular view
        case 1:
            NSLog("History selected")
            //show history view
        default:
            break; 
        }
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }


}

Another thing, If I put two views inside my controller, what is best practice to differentiate it?

回答1:

You can use the isHidden property of the UIView to show/hide your required views. First you have to link both views to IBOutlets through the Interface builder

@IBOutlet weak var historyView: UIView!
@IBOutlet weak var popularView: UIView!

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

Note: it was named hidden in Swift 1 and 2.

回答2:

If you want to do UI layout in Xcode for the two overlapping subviews, a better solution is to use two UIContainerViewController, and use the same way of setting the hidden property as suggested in the above answer.

回答3:

First of all create two outlets and connect hose to the views in your ViewController.

@IBOutlet weak var firstView: UIView!
@IBOutlet weak var secondView: UIView!

And Change the code like:

@IBAction func indexChanged(sender: UISegmentedControl)
{
    switch segmentedControl.selectedSegmentIndex
    {
    case 0:
        firstView.hidden = false
        secondView.hidden = true
    case 1:
        firstView.hidden = true
        secondView.hidden = false
    default:
        break; 
    }
}

If you don't want to create Outlets, assign the views individual tags (Say 101 and 102) and you can do it like:

@IBAction func indexChanged(sender: UISegmentedControl)
{
    switch segmentedControl.selectedSegmentIndex
    {
    case 0:
        self.view.viewWithTag(101)?.hidden = false
        self.view.viewWithTag(102)?.hidden = true
    case 1:
        self.view.viewWithTag(101)?.hidden = true
        self.view.viewWithTag(102)?.hidden = false
    default:
        break; 
    }
}

回答4:

Add both views to the view controller in the story board and set one of them to be hidden = yes or alpha = 0. When your index changed function gets called set the current view on screen to hidden = yes/alpha of 0 and set the previously hidden view to hidden = no/alpha = 1. This should achieve what you want.

回答5:

@IBAction func acSegmentAction(_ sender: Any) {

    switch acSegmentedControl.selectedSegmentIndex
    {
    case 0:
       // print("addressview selected")

        addressView.isHidden = false
        contactProviderView.isHidden = true
    case 1:
        //print("contact provider selected")

        addressView.isHidden = true
        contactProviderView.isHidden = false
    default:
        break;
    }

    }

回答6:

If it is a simple view, not a part of the screen, you can indeed use isHidden property of two subviews of your view controller view. But I don't like this approach because it's hard to understand latter what is going on with your nib when all of the subviews are in one pile. I would add and remove those two views as child view controllers programmatically. It's the cleanest way there is, in my opinion. But even if you decided to go with just views, don't put them directly on view controller's view. Use nibs, preferably with owner class. And in many cases consider adding and constraint them programmatically. It's more code, but also cleaner and conserves resources.

来源：https://stackoverflow.com/questions/27956353/swift-segmented-control-switch-multiple-views