swift - String() 和 ""之间的区别

Question

这个问题已经有答案了:

Swift string via string literal vs initializer (1 个回答)

已关闭 6 年前。

基本上 String() 之间有什么区别和""

var x = "Test"
x = String()
x = ""

上面这两行有什么区别吗？

Answer 1

根据Apple documentation ，字符串是等效的:

Initializing an Empty String

To create an empty String value as the starting point for building a longer string, either assign an empty string literal to a variable, or initialize a new String instance with initializer syntax:

var emptyString = ""               // empty string literal
var anotherEmptyString = String()  // initializer syntax