質問編集履歴

Cannot subscript a value of type '[String : [String]]' with an index of type 'Int' というエラーが出てしまいます。

2019/06/05 13:17

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@@ -145,3 +145,153 @@
     }
 }
+【追記】
+以下のようにしてみましたが
+```
+import UIKit
+class ViewController: UIViewController,UIPickerViewDelegate,
+UIPickerViewDataSource{
+    @IBOutlet weak var rosennameTextField: UITextField!
+    @IBOutlet weak var stationnameTextField: UITextField!
+    let rosenname = ["東北新幹線","上越新幹線","東海道新幹線"]
+    let stationname:[String:[String]] =
+        [
+            "東北新幹線":["","東京","上野","大宮","小山","宇都宮","那須塩原","新白河","郡山"],
+            "上越新幹線":["","東京","上野","大宮","熊谷","高崎"],
+            "東海道新幹線":["","東京","品川","新横浜"]
+    ]
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        let rosennamePickerView = UIPickerView()
+        rosennamePickerView.delegate = self
+        rosennamePickerView.tag = 1
+        rosennameTextField.inputView = rosennamePickerView
+        let stationnamePickerView = UIPickerView()
+        stationnamePickerView.delegate = self
+        stationnamePickerView.tag = 2
+        stationnameTextField.inputView = stationnamePickerView
+        // Do any additional setup after loading the view.
+    }
+    func numberOfComponents(in pickerView: UIPickerView) -> Int {
+        return 1
+    }
+    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
+        if pickerView.tag == 1 {
+            return rosenname.count
+        }
+        else if pickerView.tag == 2 {
+            return stationname.count
+        }
+        return 0
+    }
+    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
+        if pickerView.tag == 1 {
+            return rosenname[row]
+    }
+        else if pickerView.tag == 2 {
+            **return stationname[row]**
+    }
+        return nil
+}
+    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
+        if pickerView.tag == 1 {
+            rosennameTextField.text = rosenname[row]
+        }
+        else if pickerView.tag == 2 {
+            stationnameTextField.text = **stationname[row]**
+//Cannot subscript a value of type '[String : [String]]' with an index of type 'Int'
+というエラーが出てしまいます。
+       }
+}
+    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
+        view.endEditing(true)
+    }
+}
+```