在 Xcode 8 和 Swift 3 中将 UITextField 转换为 Integer 并用它们计算
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Convert UITextField to Integer in Xcode 8 and Swift 3 and calculate with them
提问by Lupo
I searched the whole internet but only found solutions for Swift 2 or outdated Xcode versions which doesnt help me :/ Also Im very new to Xcode and Swift, so please excuse that.
我搜索了整个互联网，但只找到了 Swift 2 或过时的 Xcode 版本的解决方案，这对我没有帮助：/我对 Xcode 和 Swift 也很陌生，所以请原谅。
I want the user to input some numbers in several UITextFields and then press a "calculate" button which shows the result in a UILabel.
我希望用户在几个 UITextField 中输入一些数字，然后按下一个“计算”按钮，在 UILabel 中显示结果。
What I tested so far:
到目前为止我测试的内容：
Convert input data to Integer in Swift
Swift calculate value of UITextFields and return value
So my code looks really poor so far. Nothing worked so thats all I have and the comment shows how I want it to be:
所以到目前为止我的代码看起来很糟糕。没有任何效果，所以这就是我所拥有的，评论显示了我想要的样子：
import UIKit
class ViewController: UIViewController {
//elements from the viewcontroller
@IBOutlet weak var input1: UITextField!
@IBOutlet weak var input2: UITextField!
@IBOutlet weak var calculate: UIButton!
@IBOutlet weak var output: UILabel!
//calculation
//Just simple math like
//output = input1 + input2
//or output = (input1 + 50) + input2
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.
}
}
Thank you for helping me out =)
谢谢你帮助我=)
采纳答案by Orest Savchak
First of all, you need to create an IBAction for your button by dragging from Storyboard. I think it is not a problem.
首先，您需要通过从 Storyboard 中拖动来为您的按钮创建一个 IBAction。我认为这不是问题。
//imagine this is your IBAction function on calculate click
@IBAction func calculate(_ sender: UIView) {
output.text = String(Int(input1.text!)! + Int(input2.text!)!)
}
I skipped all validations, but for the happy path it should work
我跳过了所有验证，但对于快乐路径它应该可以工作
回答by Matt
Connect your calculate button to below action.
将您的计算按钮连接到以下操作。
@IBAction func calculate(sender: Any) {
let result = Int(input1.text!) + Int(input2.text!)
output.text = "\(result)"
}
