Ios 计算后是否显示数字？

我创建了一个小计算器来计算滴水率。我设法使所有的字段相乘，但它不会使一些计算变短。我对编码相当陌生，一直在尝试多种不同的选择。有人能帮我吗？这是我的密码：

导入UIKit

类DripCViewController:UIViewController{

//出口/////////////////////////////////////////////////////////////////////////

@IBOutlet var result: UILabel!

@IBOutlet var volume: UITextField!
@IBOutlet var drip: UITextField!
@IBOutlet var time: UITextField!

@IBAction func solve(sender: UIButton) {

    if let number1 = Int(volume.text!) {

        if let number2 = Int(drip.text!) {

            if let number3 = Int(time.text!) {

                let firstnumber = number1/number3
                    let secondnumber = firstnumber*number2

                result.text = "\(secondnumber) gtts/min"


            }
        }
    }

 func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    volume .resignFirstResponder();
    drip .resignFirstResponder() ;
    time .resignFirstResponder();
    }

//////////////////////////////////////////////////////////////////////////////////

@IBOutlet var result: UILabel!

@IBOutlet var volume: UITextField!
@IBOutlet var drip: UITextField!
@IBOutlet var time: UITextField!

@IBAction func solve(sender: UIButton) {

    if let number1 = Int(volume.text!) {

        if let number2 = Int(drip.text!) {

            if let number3 = Int(time.text!) {

                let firstnumber = number1/number3
                    let secondnumber = firstnumber*number2

                result.text = "\(secondnumber) gtts/min"


            }
        }
    }

 func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    volume .resignFirstResponder();
    drip .resignFirstResponder() ;
    time .resignFirstResponder();
    }

//数学函数/////////////////////////////////////////////////////////////////

@IBOutlet var result: UILabel!

@IBOutlet var volume: UITextField!
@IBOutlet var drip: UITextField!
@IBOutlet var time: UITextField!

@IBAction func solve(sender: UIButton) {

    if let number1 = Int(volume.text!) {

        if let number2 = Int(drip.text!) {

            if let number3 = Int(time.text!) {

                let firstnumber = number1/number3
                    let secondnumber = firstnumber*number2

                result.text = "\(secondnumber) gtts/min"


            }
        }
    }

 func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    volume .resignFirstResponder();
    drip .resignFirstResponder() ;
    time .resignFirstResponder();
    }

//////////////////////////////////////////////////////////////////////////////////

@IBOutlet var result: UILabel!

@IBOutlet var volume: UITextField!
@IBOutlet var drip: UITextField!
@IBOutlet var time: UITextField!

@IBAction func solve(sender: UIButton) {

    if let number1 = Int(volume.text!) {

        if let number2 = Int(drip.text!) {

            if let number3 = Int(time.text!) {

                let firstnumber = number1/number3
                    let secondnumber = firstnumber*number2

                result.text = "\(secondnumber) gtts/min"


            }
        }
    }

 func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    volume .resignFirstResponder();
    drip .resignFirstResponder() ;
    time .resignFirstResponder();
    }

//键盘覆盖功能///////////////////////////////////////////////////////

@IBOutlet var result: UILabel!

@IBOutlet var volume: UITextField!
@IBOutlet var drip: UITextField!
@IBOutlet var time: UITextField!

@IBAction func solve(sender: UIButton) {

    if let number1 = Int(volume.text!) {

        if let number2 = Int(drip.text!) {

            if let number3 = Int(time.text!) {

                let firstnumber = number1/number3
                    let secondnumber = firstnumber*number2

                result.text = "\(secondnumber) gtts/min"


            }
        }
    }

 func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    volume .resignFirstResponder();
    drip .resignFirstResponder() ;
    time .resignFirstResponder();
    }

func触摸开始（触摸：设置，withEvent事件：UIEvent？）{
volume.resignFirstResponder（）；
drop.resignFirstResponder（）；
time.resignFirstResponder（）；
}

}

---

}您正在将用户输入转换为整数。这些是没有额外精度的整数（例如，只有1、23等，而不是1.5和2.3）。您可以使用支持精度更高的数字的数字类型，如双精度

您需要使用

Float

或

Double

而不是

Int

固定代码：

if let number1 = Double(volume.text!) {

    if let number2 = Double(drip.text!) {

        if let number3 = Double(time.text!) {

            let firstnumber = number1/number3
                let secondnumber = firstnumber*number2

            result.text = "\(secondnumber) gtts/min"


        }
    }
}

---

我该怎么做呢？