Question

 @IBOutlet weak var textBox: UITextField!


@IBOutlet weak var result: UILabel!


@IBAction func calculate(sender: AnyObject) {

var age = textBox.text.toInt()

var Years = age! * 7

    result.text = "your cat is "+ catYears + "cat years old"//cat years is an int who do i print it
}

所以在将textBox转换为整数后，如何以整数形式打印它。

Answer 1

result.text = "your cat is \(Years) cat years old"

Answer 2

有两种基本方法：

result.text = "Your cat is \(catYears) years old."

result.text = "Your cat is " + catYears.description + " years old."

您还可以使用NSNumberFormatter，它支持更复杂的功能，例如千分之一分隔符等等：

let formatter = NSNumberFormatter()
formatter.hasThousandSeparators = true
let catYearsString = formatter.stringFromNumber(catYears)

result.text = "Your cat is " + catYearsString! + " years old."

如何在Swift中打印整数

2 个答案: