Swift-UInt行为 [英] Swift - UInt behaviour

问题描述

使用我的64位Mac(Macbook Pro 2009)，Xcode操场上的这段代码表现得很奇怪:

Using my 64 bit Mac (Macbook Pro 2009), this code in Xcode playground is acting weird:

let var1 = UInt32.max // 4,294,967,295
let var2 = UInt64.max // -1 --> why?
var var3: UInt = UInt.max // -1 --> why?
var3 = -1 // generates an error. 

将var3设置为-1会产生错误.但是在声明行中，它等于-1.

setting var3 to -1 should generate an error. But in the declaration line, it became equal to -1.

推荐答案

显然，这只是快速操场中的一个错误，根据@Anton的说法，打印变量会显示正确的值.

Apparently this is just a bug in swift playground and according to @Anton, printing the variables shows the correct value.

这篇关于Swift-UInt行为的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！