如何在核心数据中存储UIButton值？

Question

如何在核心数据中存储UIButton值。我有两个名为BloodGroup和city的按钮。 当用户单击任何按钮时， pickerview会出现在底部，并且有“ cancel and done”按钮。因此，用户从UIPickerview选择值，然后单击“ Done”按钮，然后UIPickerview消失，该值将显示在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？

第二种选择是，如果我们可以将此值存储在uitextfield中，则很容易。

2）谁能告诉我如何将数据从按钮中的选定字段传递到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

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：您可以使用当前的标题方法获取按钮标题的值。 参见： 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存储此值？ 对您来说可能会更容易。