斯威夫特的NSString字符串在Linux上

Question

在文檔中，我發現文章：https://developer.apple.com/library/ios/documentation/Swift/Conceptual/BuildingCocoaApps/WorkingWithCocoaDataTypes.html

和代碼：

import Foundation 
let myString: NSString = "123" 
if let integerValue = Int(myString as String) { 
    print("\(myString) is the integer \(integerValue)") 
} 
// prints "123 is the integer 123" 

在它的工作的MacOS，但在Lunux沒有。 我得到了一個錯誤：

error: cannot convert value of type 'NSString' to type 'String' in coercion if let integerValue = Int(myString as String) {

Answer 1

沒有進入到Linux編譯器...我建議以下解決方法。

let myString: NSString = "123" 
if let integerValue = Int(String(myString)) { 
    print("\(myString) is the integer \(integerValue)") 
} 

或

let myString: NSString = "123" 
if myString.isEqualToString("0") || myString.integerValue != 0 { 
    print("\(myString) is the integer \(myString.integerValue)") 
}