Kotlin observable 观察者

BetterZhang · Jun 28, 2017 · ec6f15a · ec6f15a
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commit ec6f15a
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diff --git a/src/com/betterzhang/learnkotlin/kotlin/Observable.kt b/src/com/betterzhang/learnkotlin/kotlin/Observable.kt
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+package com.betterzhang.learnkotlin.kotlin
+
+import kotlin.properties.Delegates
+
+/**
+ * Created by IntelliJ IDEA.
+ * Author : Andrew Zhang
+ * Email  : betterzhang.dev@gmail.com
+ * Time   : 2017/06/28 下午 2:12
+ * Desc   : Kotlin observable 观察者
+ */
+class Person2 {
+    public var name: String by Delegates.observable("init...") {
+        property, oldValue, newValue -> println("property: $property, oldValue: $oldValue, newValue: $newValue")
+    }
+}
+fun main(args: Array<String>) {
+    val person = Person2()
+    println(person.name)
+
+    person.name = "Andrew Zhang"
+    person.name = "Kotlin"
+}