UIPickerView层次结构级别
我很乐意为这个Objective-C中的代码做一个类似于这个代码的快速解决scheme。
我基本上想要一个有两个组件的select器。 我希望能够在第一个组件中select一行，并在此基础上select一个列中的组件，在第二个组件中显示相应数据的值。 这将停止寻找一个特定的足球俱乐部无尽的滚动。
数据：
Top Level: leagueName.text Second Level: teamName.text 相关代码如下所示：
// 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() var activeTextView: UITextView? // Array of teams (a bit large needs to fix... [ EPL ] is not a teamName but leagueName followed by leagueNames) let teamNamesArray = ["[ EPL ]", "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", "[ LFP ]", "Almería", "Athletic Bilbao", "Atlético Madrid", "Barcelona", "Celta de Vigo", "Córdoba", "Deportivo La Coruña", "Eibar", "Elche", "Espanyol", "Getafe", "Granada", "Levante", "Málaga", "Rayo Vallecano", "Real Madrid", "Real Sociedad", "Sevilla", "Valencia", "Villarreal", "[ BUNDESLIGA ]", "Augsburg", "Bayer Leverkusen", "Bayern München", "Borussia Dortmund", "Borussia M'gladbach", "Eintracht Frankfurt", "Freiburg", "Hamburger SV", "Hannover", "Hertha BSC", "Hoffenheim", "Mainz", "Paderborn", "Schalke", "Stuttgart", "Werder Bremen", "Wolfsburg", "[ SERIE A ]", "Atalanta", "Cagliari", "Cesena", "Chievo", "Empoli", "Fiorentina", "Genoa", "Hellas Verona", "Internazionale", "Juventus", "Lazio", "Milan", "Napoli", "Palermo", "Parma", "Roma", "Sampdoria", "Sassuolo", "Torino", "Udinese", "[ LIGUE 1 ]", "Bastia", "Bordeaux", "Caen", "Évian", "Guingamp", "Lens", "Lille", "Lorient", "Lyon", "Marseille", "Metz", "Monaco", "Montpellier", "Nantes", "Nice", "Paris Saint-Germain", "Reims", "Rennes", "Saint-Étienne", "Toulouse", "[ A-LEAGUE ]", "Adelaide United", "Brisbane Roar", "Central Coast Mariners", "Melbourne City", "Melbourne Victory", "Newcastle Jets", "Perth Glory", "Sydney FC", "Wellington Phoenix", "Western Sydney Wanderers"] 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 = "Select Home Team" homeTeamNameTextView.delegate = self awayTeamNameTextView.text = "Select Away Team" 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) { activeTextView?.text = teamNamesArray[row] teamNamesBackground.hidden = true teamNamesPicker.hidden = true return } func textViewShouldBeginEditing(textView: UITextView) -> Bool{ teamNamesBackground.hidden = false teamNamesPicker.hidden = false activeTextView = textView return false } }