如何在Java脚本（Smartface）中创建透明按钮

Question

I am just trying to make a transparent button in the smartface cloud IDE using java script, and every time I make it transparent it wont read a click. I can increase the opacity all the way to alpha = .1 but when I set it equal to zero it wont work. How can I fix this, or is there another way to do this. I just want the button to take this form...

left : "50%", top : "50%", height : "50%", width : "50%", (The bottom right hand corner)

This is the code I have for the button (It doesn't work)

var myTextBtn = new SMF.UI.TextButton({
    left : '50%',
    top : '50%',
    width : '50%',
    height : '50%',
    text : "",
    onPressed : alert("Pressed"),
});
myTextBtn.alpha = 0;
page1.add(myTextBtn);

Answer 1

alpha shouldn't affect click unless it is 0 . The problem is onPressed accepts callback function. But you are calling alert function there and giving its result to onPressed property.

Try this:

var myTextBtn = new SMF.UI.TextButton({
    left : '50%',
    top : '50%',
    width : '50%',
    height : '50%',
    text : "",
    onPressed : function() {
        alert("Pressed");
    }
});
myTextBtn.alpha = 0.5;
page1.add(myTextBtn);