class HTMLElement {

let name: String
let text: String?

@lazy var asHTML: () -> String = {
[unowned self] in
if let text = self.text {
return "<\(self.name)>\(text)</\(self.name)>"
} else {
return "<\(self.name) />"
}
}

init(name: String, text: String? = nil) {
self.name = name
self.text = text
}

deinit {
println("\(name) is being deinitialized")
}

}
var paragraph: HTMLElement? = HTMLElement(name: "p", text: "hello, wor
ld")
println(paragraph!.asTHML())
paragraph = nil
请问：最后一行怎么没有打印打印  "p is being deinitialized"

这个是书上的一个例子，为什么没有释放内存啊

还未看到，LZ C和OC的知识如果掌握了就尽快进入流程~swift入学后学习，你可以参考下iOS广告页那个树状图。