打印出 如下:

Jack,Optional(21)岁,M,身高Optional("174厘米"),有房,求交往! 

请问为什么会有 Optional ??

===>

var slider = sender as UISlider

//        var i = Int(slider.value)

        var i :Int = Int(slider.value)

        height.text = "\(i)厘米"

===>

return result.text = "\(name.text),\(age)岁,\(genderText),身高\(height.text),\(hasPropertyText),求交往! "

=== >