質問編集履歴
1
最後にエラーが出ます
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@@ -1,4 +1,6 @@
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```ここに言語を入力
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コード
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### 前提・実現したいこと
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```### 前提・実現したいこと
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プログラミング初心者になります。
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UIpicker対応のtextfieldを２つ置いて、最初のtextfieldで選択した値によって
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@@ -93,5 +95,81 @@
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ここに問題に対して試したことを記載してください。
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### 補足情報（FW/ツールのバージョンなど）
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```ここに言語を入力
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import UIKit
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101
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class ViewController: UIViewController,UITextFieldDelegate,UIPickerViewDelegate,UIPickerViewDataSource {
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@IBOutlet weak var text_field_daieria: UITextField!
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@IBOutlet weak var text_field_chueria: UITextField!
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105
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106
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let chueria_dic:[String:[String]] = [
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107
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"北海道地方":["","北海道"],
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108
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"東北地方":["","青森県","秋田県","岩手県","宮城県","山形県","福島県"]]
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109
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let daieria_arr =
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["","北海道地方","東北地方"]
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let chueria_arr =
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["","北海道","青森県","秋田県","岩手県","宮城県","山形県","福島県"]
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114
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115
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116
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let my_pickerView = UIPickerView()
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var current_arr : [String] = []
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var active_textfield : UITextField!
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override func viewDidLoad() {
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super.viewDidLoad()
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// Do any additional setup after loading the view.
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text_field_daieria.delegate = self
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text_field_chueria.delegate = self
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my_pickerView.delegate = self
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my_pickerView.dataSource = self
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text_field_daieria.inputView = my_pickerView
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text_field_chueria.inputView = my_pickerView
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}
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//修正箇所
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func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
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switch textField{
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case text_field_daieria:current_arr = daieria_arr
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case text_field_chueria:
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145
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if let daieria = text_field_daieria.text,!daieria.isEmpty{
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current_arr = chueria_dic[daieria]!
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}else{
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current_arr = chueria_arr
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}
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default:print("default")
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}
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my_pickerView.reloadAllComponents()
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return true
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}
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override func didReceiveMemoryWarning() {
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super.didReceiveMemoryWarning()
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}
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func numberOfComponents(in pickerView: UIPickerView) -> Int {
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return 1
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161
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}
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func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
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return current_arr.count
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}
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165
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func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
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return current_arr[row]
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}
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func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
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**active_textfield.text = current_arr[row]**//ここで、Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional valueとエラーが出ます。
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170
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171
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}
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172
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173
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}
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174
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```
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97
175
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ここにより詳細な情報を記載してください。
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