Question

我似乎无法让我的两个UITextView正确使用我的UIPickerView与Swift合作。

我尝试使用标签来区分我的TextView，但我的第二个TextView无法正确更新。

有人能指出我正确的方向吗？

//
//  ViewController.swift


import UIKit

class ViewController: UIViewController, UITextViewDelegate, UIPickerViewDelegate {

    @IBOutlet weak var homeTeamNameTextView: UITextView!
    @IBOutlet weak var awayTeamNameTextView: UITextView!

    @IBOutlet weak var teamNamesPicker: UIPickerView! = UIPickerView()

    // Array of teams
    let teamNamesArray = ["Arsenal", "Aston Villa", "Burnley", "Chelsea", "Crystal Palace", "Everton", "Hull City", "Leicester City", "Liverpool", "Manchester City", "Manchester United", "Newcastle United", "Queens Park Rangers", "Southampton", "Stoke City", "Sunderland", "Swansea City", "Tottenham Hotspur", "West Bromwich Albion", "West Ham United"]

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        teamNamesPicker.hidden = true;
        teamNamesPicker.delegate = self
        homeTeamNameTextView.text = teamNamesArray[0]
        homeTeamNameTextView.delegate = self
        awayTeamNameTextView.text = teamNamesArray[1]
        awayTeamNameTextView.delegate = self
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    // returns the number of 'columns' to display.
    func numberOfComponentsInPickerView(pickerView: UIPickerView!) -> Int{
        return 1
    }

    // returns the # of rows in each component..
    func pickerView(pickerView: UIPickerView!, numberOfRowsInComponent component: Int) -> Int{
        return teamNamesArray.count
    }

    func pickerView(pickerView: UIPickerView!, titleForRow row: Int, forComponent component: Int) -> String! {
        return teamNamesArray[row]
    }

    func pickerView(pickerView: UIPickerView!, didSelectRow row: Int, inComponent component: Int) {
        if homeTeamNameTextView.tag == 0 {
            homeTeamNameTextView.text = teamNamesArray[row]
            teamNamesPicker.hidden = true;
        } else if awayTeamNameTextView.tag == 1 {
            awayTeamNameTextView.text = teamNamesArray[row]
            teamNamesPicker.hidden = true;
        }
        return
    }

    func textViewShouldBeginEditing(textView: UITextView) -> Bool{
        teamNamesPicker.hidden = false
        return false
    }


}

Answer 1

将此属性添加到您的班级：
```
var activeTextView: UITextView?
```

在textViewShouldBeginEditing设置activeTextView：

func textViewShouldBeginEditing(textView: UITextView) -> Bool{
    teamNamesPicker.hidden = false
    activeTextView = textView
    return false
}

在pickerView:didSelectRow:inComponent:中使用activeTextView更新正确的文字视图：

func pickerView(pickerView: UIPickerView!, didSelectRow row: Int, inComponent component: Int) {
    activeTextView?.text = teamNamesArray[row]
    teamNamesPicker.hidden = true
    return
}

带有一个选择器的多个TextView

1 个答案: