【ios開(kāi)發(fā)/Xcode】實(shí)現(xiàn)省會(huì)問(wèn)答

• 實(shí)現(xiàn)效果
• 源代碼

實(shí)現(xiàn)效果

圖1為初始界面，點(diǎn)擊【顯示答案】結(jié)果如圖2所示顯示答案為“福州”，點(diǎn)擊【下一個(gè)】如圖3所示顯示下一個(gè)省份，同樣也可以點(diǎn)擊【顯示答案】將答案進(jìn)行展示。

源代碼

注：@開(kāi)頭的這些代碼都是需要關(guān)聯(lián)控鍵，都需要自行在故事板中(Storyboards)進(jìn)行關(guān)聯(lián)

import UIKit
class ViewController: UIViewController {@IBOutlet weak var L1: UILabel!@IBOutlet weak var L2: UILabel!let pA:[String] = ["福建","河北","山東","吉林","黑龍江","遼寧","內(nèi)蒙古"]let cA:[String]=["福州","石家莊","濟(jì)南","長(zhǎng)春","哈爾濱","沈陽(yáng)","呼和浩特"]var pIndex: Int=0@IBAction func B1(_ sender: UIButton) {let city:String = cA[pIndex]L2.text=city} @IBAction func B2(_ sender: UIButton) {pIndex += 1if pIndex == pA.count{pIndex=0}let province:String=pA[pIndex]L1.text=provinceL2.text="???"}override func viewDidLoad() {super.viewDidLoad()// Do any additional setup after loading the view, typically from a nib.L1.text=pA[pIndex]L2.text="???"}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}
}

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