自定义打印协议CustomStringConvertible和CustomDebugStringConvertible
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| class Person {
var age: Int = 10
}
extension Person: CustomStringConvertible {
var description: String {
"person age: \(age)"
}
}
extension Person: CustomDebugStringConvertible {
var debugDescription: String {
"debugPerson age: \(age)"
}
}
|
调用
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| let p = Person()
print(p)
debugPrint(p)
|
打印结果
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| person age: 10
debugPerson age: 10
|
当处于Release模式的时候，debugPrint也仍然会输出。目前看不出区别
当在控制台po的时候，调用的是CustomDebugStringConvertible的debugDescription方法