每次用户按下按钮时,我都会尝试将某些内容附加到数组中,并将其保存为UserDefault。
我可以根据用户输入的内容将文本字段保存为用户默认字段,但保存它并将其附加到我的数组时遇到了问题。
import UIKit
var nums = ["3","4","5"]
class ViewController: UIViewController {
@IBOutlet weak var text: UITextField!
@IBAction func submit_button(_ sender: Any) {
UserDefaults.standard.set(text.text!, forKey: "Submitted")
// append
nums.append("\(String(describing: text))")
}
override func viewDidLoad() {
super.viewDidLoad()
let savedscore = UserDefaults.standard.object(forKey: "Submitted")
if let saving = savedscore as?
String{text.text = saving}
}
}
每次有人在文本字段中提交时,我都会尝试让我的数组变大
发布于 2019-05-17 11:25:33
我已经改进了你的代码并解决了你的问题。所以,请继续检查下面的代码,并在评论中分享你的评论。
import UIKit
class ViewController: UIViewController {
var nums = [String]()
@IBOutlet weak var textField: UITextField!
@IBAction func submit_button(_ sender: Any) {
if let text = textField.text {
// Append to array
nums.append("\(text)")
// Save to User Defaults
UserDefaults.standard.set(nums, forKey: "NumberOfArray")
UserDefaults.standard.set(textField.text, forKey: "Submitted")
// Refresh User Defaults
UserDefaults.standard.synchronize()
}
// Print Updated Data
print("numbers: \(nums)")
print("text: \(textField.text ?? "")")
}
override func viewDidLoad() {
super.viewDidLoad()
let savedscore = UserDefaults.standard.object(forKey: "Submitted")
if let saving = savedscore as? String
{
textField.text = saving
}
// Update Array Based on userdefault data.
nums = UserDefaults.standard.object(forKey: "NumberOfArray") as? [String] ?? []
// Print Saved Data
print("numbers: \(nums)")
print("text: \(textField.text ?? "")")
}
}
https://stackoverflow.com/questions/56175060
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