Swift userInput.toInt（）错误？

Question

下面是代码：

let answer = randomIntBetween(1, high: 100) 

print("Enter a number between 1 and 100!") 

let userInput = input() 
let inputAsInt = userInput.toInt() 

if let guess = inputAsInt { 
if (guess > answer) { 
    print("Your guess was too high!") 
} else if (guess < answer) { 
    print("Your guess was too low!") 
} else { 
    print("You got it dead on! The answer was \(answer)!") 
} 
} else { 
print("Not a valid answer, try adding a number!") 
} 

我下面的指南（只学了一个月左右），我知道.toInt（液）移出，但我需要放在它的位置？

Answer 1

羽绒被替换它。

let inputAsInt = Int(userInput)