Introduction to flex

Public class as_001 extends sprite {public function as_001 () {var V1: Int = 9; trace (V1); var V2: uint = 10; // unsigned number var v3: boolean = true; var V4: Number = 4.5; var V5: String = "Hello World"; var V6: String = 'Hello world !!! '; Var V7: * = 3; // trace (V7) of any data type; V7 = "hello"; trace (V7); var V8; trace (V8 ); // undefinedvar V9: string; trace (V9); // nullvar V10: array = [2, 3, 4, 5]; // array trace (V10); var V11: object = {ID: 3, Username: "admin", password: "admin"}; trace (v11.username );}}

Output result

9

3

Hi!

Undefined

Null

2, 3, 4, 5

Admin

public function my_function(){var v1:Array = ["a", "b", "c", "d", "e"];for(var i:String in v1){trace(i);trace(v1[i]);}for each(var propertyValue:String in v1){trace(propertyValue);}var v2:Object = {id:1, name:"admin", age:22};for(var i in v2){trace(i);trace(v2[i]);}for each(var propertyValue:String in v2){trace(propertyValue);}trace(v2["name"]);}

Public Function my_function1 () {var traceparameter: function = function (aparam: string): void {trace (aparam) ;}; traceparameter ("hello"); var tracearray: array = new array (); tracearray [0] = function (aparam: string): void {trace (aparam) ;}; tracearray [0] ("hello "); F ("admin"); F1 ("admin1", "admin2");} public function f (Name: String = "zhangsan"): void {trace (name ); // zhangsan is the default parameter} public function F1 (... ARGs): void {trace (ARGs. length); // Variable Parameter}

ActionScript object-oriented

Create an ActionScript class student.

Package COM. umgsai. as3 {public class student {private VaR _ name: String = "zhangsan"; Public Function student () {} public function set name (Name: string ): void {// set method this. _ name = Name;} public function get name (): String {// get method return this. _ name ;}}}

Use

VaR S: Student = new student (); trace (S. name); // It is equivalent to calling function get name () and outputting zhangsans. name = "admin"; // equivalent to calling function set name () trace (S. name); // output Admin

ActionScript dynamic class

Create a teacher Class

package com.umgsai.as3{public dynamic class Teacher{public function Teacher(){}}}

Use

VaR T: Teacher = new teacher (); // The teacher class is a dynamic class T. F = function () {// dynamically add F function trace ("F");} t. F (); Delete T. f; // Delete F function // T. F (); // This sentence will report an error

Use the ActionScript Interface

Iflyable.

Package com. umgsai. as3 {public interface iflyable // The interface generally starts with I {function fly (): void; // do not write public modifiers }}

Implementation Interface

Package COM. umgsai. as3 {public class t implements iflyable {public function T () {} public function fly (): void // implementation interface method {trace ("fly ");}}}

Use

var tt:IFlyable  = new T();tt.fly();

ActionScript Exception Handling

try{throw new EOFError("error occurs");} catch(error:Error) {trace(error);}finally{trace("finnaly");}

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Introduction to flex