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给出的错误是’CountableClosedRange< Int>‘类型的表达模式对于我在switch语句中尝试使用不同值范围的交换机情况,无法匹配“Int”类型的值:
switch hour { case 0 ... 11: greeTingStatement.text = "Good Morning" case 12 ... 24: greeTingStatement.text = "Good Evening" default: greeTingStatement.text = "Hello" }
这是完整的代码:
import UIKit class ViewController: UIViewController { @IBOutlet weak var userInput: UITextField! @IBOutlet weak var usertOutput: UILabel! @IBOutlet weak var tapMeAfterEnteringYourName: UIButton! @IBOutlet weak var greeTingStatement: UILabel! @IBOutlet weak var letsGetStartedLabel: UILabel! @IBOutlet weak var ballonsImageView: UIImageView! @IBOutlet weak var teacherPoinTingToBoardImage: UIImageView! @IBACtion func setOutput(_ sender: AnyObject){ greeTingStatement.isHidden = false usertOutput.text=userInput.text tapMeAfterEnteringYourName.isHidden = true userInput.isHidden = true letsGetStartedLabel.isHidden = false ballonsImageView.isHidden = false let date = Date() let calendar = Calendar.current let components = (calendar as NSCalendar).components([.hour],from: datE) let hour = components.hour switch hour { case 0 ... 11: greeTingStatement.text = "Good Morning" case 12 ... 24: greeTingStatement.text = "Good Evening" default: greeTingStatement.text = "Hello" } view.BACkgroundColor = UIColor.magenta teacherPoinTingToBoardImage.isHidden=true var timer = Timer.scheduledTimer(timeInterval: 1.4,target: self,SELEctor: #SELEctor(ViewController.updateViewController),userInfo: nil,repeats: falsE) let hover = CABasicAnimation(keyPath: "position") hover.isAdditive = true hover.fromValue = NSValue(cgPoint: CGPoint.zero) hover.toValue = NSValue(cgPoint: CGPoint(x: 0.0,y: -100.0)) hover.autoreverses = true hover.duration = 5 hover.repeatCount = Float.infinity ballonsImageView.layer.add(hover,forKey: "myHoverAnimation") } func updateViewController() { print("Timer just fired") let storyBoard : UIStoryboard = UIStoryboard(name: "Main",bundle:nil) let resultViewController = storyBoard.instantiateViewController(withIdentifier: "MadLibOneViewController") as! MadLibOneViewController self.present(resultViewController,animated:true,completion:nil) } override func viewDidLoad() { super.viewDidLoad() view.BACkgroundColor=UIColor.purple usertOutput.textColor=UIColor.white userInput.textColor = UIColor.purple greeTingStatement.isHidden = true letsGetStartedLabel.isHidden = true ballonsImageView.isHidden = true } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() } }
有人可以澄清这只是一个通用的任何类型的Int是允许的还是预期的?
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