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所以我正在通過動作完全創建一個計算器的過程中，暫存區域中沒有任何東西。到目前爲止，我正在執行計算。但是，我似乎有問題。我的代碼示例如下圖所示：AS3計算器
import flash.events.MouseEvent;
var btn:Array = new Array();
for(var i = 0; i < 10; i++) {
var myBtn:Btn = new Btn();
myBtn.y = 15;
myBtn.x = i * 100 + 15;
myBtn.width = 48;
myBtn.height = 48;
myBtn.buttonMode = true;
myBtn.mouseChildren = false;
myBtn.num = Number(i);
myBtn.caption.text = String (i);
addChild(myBtn);
btn.push(myBtn);
btn[i].addEventListener(MouseEvent.CLICK,pressNumber);//EVENT TO ADD NUMBERS TO DISPLAY
}
btn[0].y += 370;
btn[0].x += 10;
btn[1].y += 310;
btn[1].x += -90;
btn[2].y += 310;
btn[2].x += -130;
btn[3].y += 310;
btn[3].x += -170;
btn[4].y += 250;
btn[4].x += -390;
btn[5].y += 250;
btn[5].x += -430;
btn[6].y += 250;
btn[6].x += -470;
btn[7].y += 190;
btn[7].x += -690;
btn[8].y += 190;
btn[8].x += -730;
btn[9].y += 190;
btn[9].x += -770;
//OPERATORS//
var operators:Array = new Array();
for(var io:int = 0; io < 6; io++) {
var opBtn:Btn_operator = new Btn_operator();
opBtn.width = 48;
opBtn.height = 48;
opBtn.buttonMode = true;
opBtn.mouseChildren = false;
opBtn.caption_op.text = String (".");
addChild(opBtn);
operators.push(opBtn);
operators[io].addEventListener(MouseEvent.CLICK, pressOperator);//EVENT TO ADD OPERATORS TO DISPLAY
}
//ADD DOT
var dot:Btn_dot = new Btn_dot();
dot.width = 48;
dot.height = 48;
dot.buttonMode = true;
dot.mouseChildren = false;
dot.caption_op.text = String (".");
addChild(dot);
dot.y += 383;
dot.x += 78;
dot.addEventListener(MouseEvent.CLICK, addDot);//EVENT TO ADD DOT TO DISPLAY
//BACKSPACE
var goBack:Btn_backspace = new Btn_backspace();
goBack.width = 48;
goBack.height = 48;
goBack.buttonMode = true;
goBack.mouseChildren = false;
goBack.caption_op.text = String ("<--");
addChild(goBack);
goBack.y += 203;
goBack.x += 256;
goBack.addEventListener(MouseEvent.CLICK, backSpace);//EVENT TO GO BACK SPACE IN DISPLAY
//BACKSPACE
var clearAll:Btn_clear = new Btn_clear();
clearAll.width = 48;
clearAll.height = 48;
clearAll.buttonMode = true;
clearAll.mouseChildren = false;
clearAll.caption_op.text = String ("C");
addChild(clearAll);
clearAll.y += 323;
clearAll.x += 256;
clearAll.addEventListener(MouseEvent.CLICK, clearFields);//EVENT TO GO BACK SPACE IN DISPLAY
operators[0].y += 383;
operators[0].x += 138;
operators[0].caption_op.text = String("=");
operators[1].y += 383;
operators[1].x += 198;
operators[1].caption_op.text = String("/");
operators[2].y += 323;
operators[2].x += 198;
operators[2].caption_op.text = String("*");
operators[3].y += 263;
operators[3].x += 198;
operators[3].caption_op.text = String("-");
operators[4].y += 203;
operators[4].x += 198;
operators[4].caption_op.text = String("+");
operators[5].y += 263;
operators[5].x += 256;
operators[5].caption_op.text = String("-/+");
//VARIABLE HANDLE OPERATION NOT BUTTON
var operate:String;
//HANDLE FIRST AND SECOND VALUE
var num1:Number;
var num2:Number;
//grouping all buttons in function
//display_txt.text = "0";
//DISPLAYING NUMBERS IN DISPLAY
//var numberEntered:String ="";
function pressNumber(e:MouseEvent):void{
display_txt.appendText(e.target.num);
}
//DISPLAY OPERATORS
function pressOperator(event:MouseEvent):void{
var operatorEntered:String;
trace("a",display_txt.text,display_txt.text.length,event.currentTarget.caption_op.t ext,event.currentTarget.caption_op.text.length);
display_txt.appendText(event.currentTarget.caption_op.text);
//CHECKING FOR VALUES AND STORING NUMBERS
trace("b",display_txt.text);
if(isNaN(num1)){
//CONVERT STRING TO NUMBER
num1=Number(display_txt.text);
operate = operatorEntered;
display_txt.text = "";
//trace(num1,isNaN(num1)); // if this outputs some number and true, display_txt an html enabled textfield, has kerning enabled or is a multiline textfield. fix that.
}
else if(isNaN(num2)){
num2 = Number(display_txt.text);
//trace(num1,isNaN(num2)); // if this outputs some number and true, display_txt an html enabled textfield, has kerning enabled or is a multiline textfield. fix that.
performCalculation();
operate = operatorEntered;
}
}
//CLEARS DISPLAY AREA
function clearFields(event:MouseEvent):void{
display_txt.text = "";
num1=NaN;
num2=NaN;
}
//ADDS DECIMAL PLACE
function addDot(event:MouseEvent):void{
if(event.target.num == Number(display_txt.text))
{
display_txt.text = "0";
}
if (display_txt.text.indexOf(".")==-1){
display_txt.appendText(".");
}
}
//BACKSPACE DISPLAY AREA
function backSpace(e:MouseEvent):void{
var temp_str:String = display_txt.text;
display_txt.text = temp_str.substr(0, (temp_str.length-1)); // Get rid of last character in the string, which in this case is the phantom \r or \n character
}
function performCalculation():void{
switch (operate){
case "multiply":
num1*=num2;
break;
case "divide":
num1/=num2;
break;
case "subtract":
num1-=num2;
break;
case "add":
num1+=num2;
break;
default:
break;
}
//now that we found out the result
//let's display on the window
display_txt.text=String(num1);
num2=NaN;
}
它似乎並沒有被執行計算並在下面所示的代碼，它的目的是要調用函數來執行計算，但它不會似乎正在這樣做，當我試圖跟蹤num1它輸出爲NaN當它是爲了顯示最後按下按鈕，當我點擊一個操作符。
function pressOperator(event:MouseEvent):void{
var operatorEntered:String;
trace("a",display_txt.text,display_txt.text.length,event.currentTarget.caption_op.t ext,event.currentTarget.caption_op.text.length);
display_txt.appendText(event.currentTarget.caption_op.text);
//CHECKING FOR VALUES AND STORING NUMBERS
trace("b",display_txt.text);
if(isNaN(num1)){
//CONVERT STRING TO NUMBER
num1=Number(display_txt.text);
operate = operatorEntered;
display_txt.text = "";
//trace(num1,isNaN(num1)); // if this outputs some number and true, display_txt an html enabled textfield, has kerning enabled or is a multiline textfield. fix that.
}
else if(isNaN(num2)){
num2 = Number(display_txt.text);
//trace(num1,isNaN(num2)); // if this outputs some number and true, display_txt an html enabled textfield, has kerning enabled or is a multiline textfield. fix that.
performCalculation();
operate = operatorEntered;
}
}
我認爲這是導致NaN的，因爲沒有任何事情到瓦爾的操作，但是operatorEntered它們都進入對方。我將如何解決？
對於'String-> Number'的轉換，你需要'parseInt（str_num）'或'parseFloat（str_num）'方法，而不是'Number（str_num）'。 – Engineer 2012-03-16 20:25:02