ios – 将AnyObject转换为Int

println(currentObject[0])
println(_stdlib_getDemangledTypeName(currentObject[0]))

2

Swift.ImplicitlyUnwrappedOptional<Swift.AnyObject>

我正在尝试将currentObject [0]转换为Int.这是我试过的：

let num: Int = currentObjec[0] as! Int

当我运行应用程序时,我收到以下错误：

Could not cast value of type ‘__NSCFString’ (0x103c93c50) to ‘NSNumber’ (0x103535b88)

当我尝试这个：currentObject [0] .toInt()

我收到一个错误说

‘AnyObject’ does not have a member named ‘toInt()’

我能够使其工作的唯一方法是执行以下操作：

let numStr = currentObject[0] as! String
let num: Int = numStr.toInt()!

有更简单的方法吗？ (无需先将其转换为String.)

Could not cast value of type ‘__NSCFString’ (0x103c93c50) to ‘NSNumber’ (0x103535b88)

你可以得出结论,currentObject [0]实际上是一个NSString.
在这种情况下,你可以简单地转换它

let numStr = currentObject[0].integerValue

但请注意,如果数组元素不是NSString,则会崩溃.