class Sweeter {
dynamic func change() {
print("🍍")
}
}
extension Sweeter {
@_dynamicReplacement(for:change())
func changeA() {
print("🍉")
}
}
Sweeter().changeA()
打印：🍉
class Sweeter {
dynamic func change() {
print("🍍")
}
}
extension Sweeter {
@_dynamicReplacement(for:change())
func changeA() {
print("🍉")
}
}
Sweeter().changeA()
打印：🍉
本文标题：Swift5 交换方法 @_dynamicReplacement
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