將布爾值從true更改爲false並將其用於if（）之後使用jquery

Question

我嘗試了幾種方法將布爾值輸出實現爲if語句。不知怎的，我做錯了。我可以改變布爾值和console.log的值，所以這應該是正確的。然後我嘗試在一個if語句中使用它，但不知何故它被忽略，並沒有給出預期的結果。 這是我的代碼：

var heroVelX = game.currentHero.GetLinearVelocity().x; 
    var heroVelY = game.currentHero.GetLinearVelocity().y; 
    var speed = Math.sqrt(Math.pow(heroVelX, 2) + Math.pow(heroVelY, 2)); 
    var moveOn = ""; 

    function delay(){ 
     moveOn = Boolean(speed<1.5); 
     console.log("Speed = " + speed + " " + moveOn);  
    }; 

    setTimeout(delay, 3500); 

    // These are the conditions I have tried using. I can see in console.log that the value is changed. But somehow it is ignored? All the other conditions are accepted in the if-statement.  
    // moveOn ===!false 
    // moveOn == true 

    if(!game.currentHero.IsAwake() || moveOn === !false || heroX<0 || heroX >game.currentLevel.foregroundImage.width){ 
      // then delete the old hero 
      box2d.world.DestroyBody(game.currentHero); 
      game.currentHero = undefined; 
      // and load next hero 
      game.mode = "load-next-hero"; 
     } 

誰能告訴我什麼，我做錯了什麼？

Answer 1

你正在做的幾件事情錯了......

首先，這是可怕的定義VAR爲字符串，而這種改變後，爲布爾值。

其次，把你的布爾值放入不同的日誌中，並用dir代替。

if語句太混亂了。

而且沒有必要轉換爲布爾值。

看看這個：

var heroVelX = game.currentHero.GetLinearVelocity().x; 
var heroVelY = game.currentHero.GetLinearVelocity().y; 
var speed = Math.sqrt(Math.pow(heroVelX, 2) + Math.pow(heroVelY, 2)); 
var moveOn = false; 

function delay(){ 
    moveOn = (speed<1.5) ? true : false; 
    console.log("Speed = " + speed); 
    console.dir(moveOn); 


}; 

setTimeout(delay, 3500); 

if(!game.currentHero.IsAwake() || moveOn || heroX<0 || heroX >game.currentLevel.foregroundImage.width){ 
     // then delete the old hero 
     box2d.world.DestroyBody(game.currentHero); 
     game.currentHero = undefined; 
     // and load next hero 
     game.mode = "load-next-hero"; 
    }