swift学习猜数字app

刺骨的言语ヽ痛彻心扉 2022-10-02 02:58 85阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

![155936_OaTW_113421.png][]

新建iOS single view application 名字为whatNumber, 打开main storyboard选中view controoler, 右上角, attribute inspector中simulated metrics 的size 选择iphone 4.7-inch这样view controller更像是一个iphone..

然后拖动三个控件到界面上lable, text field, button

最后打开assistant editor, ctrl 拖动这三个控件到viewController.swift中, 会自动生成如下代码

@IBOutlet weak var resultLabel: UILabel!  
@IBOutlet weak var guessField: UITextField!  
@IBAction func checkBtnPressed(sender: UIButton) \{

完整的代码如下:

//
    //  ViewController.swift
    //  whatNumber
    //
    //  Created by cyper on 6/2/16.
    //  Copyright © 2016 Moaz Tech. All rights reserved.
    //
    
    import UIKit
    
    class ViewController: UIViewController {
        
        let randomNum = arc4random_uniform(5)
    
        @IBOutlet weak var resultLabel: UILabel!
        
        @IBOutlet weak var guessField: UITextField!
        
        
        override func viewDidLoad() {
            super.viewDidLoad()
            // Do any additional setup after loading the view, typically from a nib.
            
            print(randomNum)
        }
    
        override func didReceiveMemoryWarning() {
            super.didReceiveMemoryWarning()
            // Dispose of any resources that can be recreated.
        }
    
    
        @IBAction func checkBtnPressed(sender: UIButton) {
            let userEntered = guessField.text
            let generated = String(randomNum)
            
            guessField.text = ""
            
            if userEntered == generated {
                resultLabel.text = "Correct Answer"
                resultLabel.textColor = UIColor.greenColor()
            } else {
                
                resultLabel.text = "Incorrect! Try Again."
                resultLabel.textColor = UIColor.redColor()
            }
            
        }
    }

学到的:

在Attribute inspector中可以设置text field的Keyboard type为Number Pad, 这样当text field获得焦点时弹出的就是数字键盘.

设置文本的颜色: resultLabel.textColor = UIColor.redColor()

生成随机数用func arc4random\_uniform(\_: UInt32) -> UInt32 , 比如arc4random\_uniform(5)可以生成0~4的随机数字, 依此类推.

转载于:https://my.oschina.net/uniquejava/blog/686060

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220113/9fcdd360f31a4dfc8d40bf33934ffc92.png
[155936_OaTW_113421.png]: /images/20220113/1ad7a6c4c5724f3990078eb9117db42f.png