實例屬性
debug
debugDescription
此實例的文本表示,適用於調試。
聲明
var debugDescription: String { get }
詳述
不鼓勵直接調用此屬性。相反,使用 String(reflecting:)
初始化程序將任何類型的實例轉換為字符串。此初始化程序適用於任何類型,並為符合 CustomDebugStringConvertible
的類型使用自定義 debugDescription
屬性:
struct Point: CustomDebugStringConvertible {
let x: Int, y: Int
var debugDescription: String {
return "(\(x), \(y))"
}
}
let p = Point(x: 21, y: 30)
let s = String(reflecting: p)
print(s)
// Prints "(21, 30)"
將p
轉換為分配給s
的字符串使用Point
類型的debugDescription
屬性。
可用版本
iOS 8.0+, iPadOS 8.0+, macOS 10.10+, Mac Catalyst 13.0+, tvOS 9.0+, watchOS 2.0+
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注:本文由純淨天空篩選整理自apple.com大神的英文原創作品 AnyHashable debugDescription。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。