如何解决"Initializer for conditional binding must have Optional type, not 'Int'"？

Question

我看过如何解决此错误的示例，但我无法在我的案例中使用它。

Initializer for conditional binding must have Optional type, not 'Int'

不应该 employeeCount 是可选的，因为它正在推断右侧？

static func getEmployeeCount() -> Int {
    if let employeeCount = UserDefaults.standard.integer(forKey: "employeeCount") {
        return employeeCount as! Int
    }
    return 0
}

Answer 1

问题是UserDefaults.standard.integerreturnInt，不是Int?。所以你不需要用 if let.

包装它

optional是否在右侧无关

在你的情况下，只需 return UserDefaults.standard.integer(forKey: "employeeCount")

如何解决"Initializer for conditional binding must have Optional type, not 'Int'"？

How to resolve "Initializer for conditional binding must have Optional type, not 'Int'"?

ios

swift

nsuserdefaults

swift4