Question

在我的应用程序中，我有一个Next按钮和一个Solution按钮。当您按下一个新卡时（即图像卡1），如果再次按下，则另一张卡会以随机方式出现。我的问题是如何有选择地显示每张卡的解决方案（即对于card1有sol1）

@IBAction func nextbutton（sender：AnyObject）{

    //Randomize a number for the first imageview
    var firstRandomNumber = arc4random_uniform(2) + 1

    //Construct a string with the random number 
    var firstCardString:String = String(format: "card%i", firstRandomNumber)

    // Set the first card image view to the asset corresponding to the randomized number
    self.Image1.image = UIImage(named: firstCardString)



}



@IBAction func solutionbutton(sender: AnyObject) {

}

Answer 1

我附上了你的问题的完整样本。你的代码的问题是你在下一个按钮中创建的变量范围有限，我们希望解决方案卡中没有相同的随机值。现在它们超出了下一步操作的范围，只需使用关键字 self

即可在此课程中轻松访问

import UIKit

class YourViewController : UIViewController {
var randomNumber:Int = 0
var cardString:String = ""
var solutionString:String = ""

@IBAction func nextbutton(sender: AnyObject) {

//Randomize a number for the first imageview
self.randomNumber = arc4random_uniform(2) + 1

//Construct a string with the random number 
self.cardString = String(format: "card%i", self.randomNumber)
self.solutionString = String(format: "sol%i", self.randomNumber)
// Set the first card image view to the asset corresponding to the randomized number
self.Image1.image = UIImage(named: self.cardString)
}

@IBAction func solutionbutton(sender: AnyObject) {
self.Image1.image = UIImage(named: self.solutionString)
}
override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
  }

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

}

如何有选择地为每张卡显示解决方案？

1 个答案: