如何在swift中更改UISegmentController的索引

Question

如何在swift中更改segmentController的索引。我想在单击按钮时应更改段索引的值

 func respondToGesture(sender: UIGestureRecognizer)
{
    if let swipeGesture = sender as? UISwipeGestureRecognizer
    {
        if swipeGesture.direction == UISwipeGestureRecognizerDirection.Right
        {
        // change the segment to previous
        }
        else
        {
            // change th esegment to next


                        }

    }

}

Answer 1

以下是为段设置所选索引的方法：

import UIKit
import AVFoundation

class ViewController: UIViewController {
    //outlet of your segment
    @IBOutlet weak var segment: UISegmentedControl!
    override func viewDidLoad() {
        super.viewDidLoad()

    }
    @IBAction func setOne(sender: AnyObject) {
        //set selected index to 0
        segment.selectedSegmentIndex = 0
    }
    @IBAction func setTwo(sender: AnyObject) {
        //set selected index to 1
        segment.selectedSegmentIndex = 1
    }
    @IBAction func setThree(sender: AnyObject) {
        //set selected index to 2
        segment.selectedSegmentIndex = 2
    }
    @IBAction func four(sender: AnyObject) {
        //set selected index to 3
        segment.selectedSegmentIndex = 3
    }
}

结果将是：

希望它有所帮助。

Answer 2

你可以这样做：

@IBOutlet weak var mySegmentControl: UISegmentedControl!
var current = 0 // For current selection

@IBAction func buttonPressed(sender: AnyObject) {
    if current == 0 {
        mySegmentControl.selectedSegmentIndex = 1
        current = 1
    } else {
        mySegmentControl.selectedSegmentIndex = 0
        current = 0
    }