如何将 UIButton 值存储在核心数据中？

Question

如何在核心数据中存储UIButton 值。我有两个按钮，分别命名为 BloodGroup 和城市。 当用户点击任何按钮然后pickerview 出现在底部并且有取消和完成按钮。所以用户从UIPickerview 中选择值并点击完成按钮然后UIPickerview 消失并且该值显示在UIButton。

需要回答两个问题。 我想将此值存储在核心数据中。 1）我们如何存储这个值？

第二个选项是如果我们可以将这个值存储在 uitextfield 中，那么这很容易。

2) 谁能告诉我如何将按钮中选定字段的数据传递给UITextField？

import UIKit

class Bloodbank: UIViewController {


    @IBOutlet weak var Bloodgroup: UIButton!

    @IBOutlet weak var City: UIButton!


    @IBOutlet weak var pickerViewObj: UIPickerView!


    @IBOutlet weak var subViewObj: UIView!



    let fruitsArrayValues = ["A+","A-","B+","B-","AB+","AB-","O+","O-"]
    let iPhoneModelArrayValues = ["Ahmedabad","Gandhinagar","Surat","Rajkot","Vadodara"]

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        subViewObj.hidden = true
    }

    //delegate methods.
    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return 1
    }

    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        //dynamic delegate methods using pickerviewObj.tag
        if pickerViewObj.tag == 0 {
            return fruitsArrayValues.count
        }
        else {
            return iPhoneModelArrayValues.count
        }
    }

    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
        if pickerViewObj.tag == 0 {
            return "\(fruitsArrayValues[row])" //its displyed to titleForRow.
        }
        else {
            return "\(iPhoneModelArrayValues[row])"
        }
    }

    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        //valuesLbl.text = pickerDataValues[row]
    }


    @IBAction func selectItemsBtn(sender: AnyObject) {

        //first they set the tag in pickerviewObj.
        subViewObj.hidden = false
        switch sender.tag {
        case 0:
            pickerViewObj.tag = 0
        case 1:
            pickerViewObj.tag = 1
        default:
            break;
        }
        pickerViewObj.reloadAllComponents()
    }



    @IBAction func cancelBtn(sender: AnyObject) {
    subViewObj.hidden = true
    }


    @IBAction func DoneBtn(sender: AnyObject) {

        if pickerViewObj.tag == 0 {
            let selectedIndex = pickerViewObj.selectedRowInComponent(0)
            Bloodgroup.setTitle(fruitsArrayValues[selectedIndex], forState: UIControlState.Normal)
        }
        else if pickerViewObj.tag == 1 {
            let selectedIndex = pickerViewObj.selectedRowInComponent(0)
            City.setTitle(iPhoneModelArrayValues[selectedIndex], forState: UIControlState.Normal)
        }
        subViewObj.hidden = true

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


}

Answer 1

正如我所见，所选值只是一个字符串。您可以将字符串存储在核心数据中。

对于第二个问题：可以用当前的title方法获取按钮的title的值。见：https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIButton_Class/#//apple_ref/occ/instp/UIButton/currentTitle

顺便说一句，您是否考虑过使用 NSUserDefaults 来存储此值？这对你来说可能更容易。