在 Xcode 9 Beta 中试用 Swift 4。
出于某种原因,在 NSObject 上使用键值访问器时我遇到了崩溃。
有任何想法吗?
import Cocoa
class Person: NSObject {
var name = ""
var age = 0
}
let alpha = Person()
alpha.name = "Robert"
alpha.age = 53
alpha.value(forKey: "name")
// error: Execution was interrupted, reason: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0).