How do I implement a multi-line flexbox?

问题:

Despite my Googling, I've found few examples on how to implement multiple line flexboxes. None of the code I've gotten from examples has worked. I have three elements inside a flexbox and I want the first to be on top and the second and third to be on the bottom row.

<div class="flexbox">
  <div id="element1">element 1</div>
  <div id="element2">element 2</div>
  <div id="element3">element 3</div>
</div>

I've tried using these properties:

.flexbox {
  width: 300px;
  display: box;
  display: -webkit-box;
  display: -moz-box;
  box-lines: multiple;
  flex-wrap: wrap;
}

#element1 {
  width: 100%;
}

and giving it a set width but it still won't wrap, even if the first element has a width of 100%. Am I missing certain vendor prefixes or is my syntax wrong?

回答1:

The flex box spec has changed in the last few months and you are using the old syntax. The new spec I believe is only currently implemented only in Chrome Canary and to some extent in latest chrome. (It's a little buggy) box-lines multiple is gone so to achieve this vertical layout there are a few ways. Using -webkit-flex-direction:column; so

<div id="flexbox">
    <div class="box">DIV 1</div>
    <div class="box">DIV 2</div>
    <div class="box">DIV 3</div>
</div>

and css :

#flexbox {
    display: -webkit-flex;
    -webkit-flex-direction: column;
    width: 500px;
    height: auto;
    min-height: 200px;
}

#flexbox .box {
    -webkit-flex: 1;

}

Using wrapping:

-webkit-flex-wrap: wrap; 

and setting your direction to:

-webkit-flex-direction: row;

So

<div id="flexbox">
    <div class="box">DIV 1</div>
    <div class="box">DIV 2</div>
    <div class="box">DIV 3</div>
    <div class="box">DIV 4</div>
    <div class="box bigger">DIV 5</div>
    <div class="box">DIV 6</div>
</div>

#flexbox {
    display: -webkit-flex;
    -webkit-flex-direction: row;
    -webkit-flex-wrap: wrap;
    width: 500px;
    height: auto;
    min-height: 200px;
    }

#flexbox .box {

    -webkit-flex: 130px 1;

    }

#flexbox .box.bigger {

    -webkit-flex: 330px 1;

    }

There's a whole bunch of examples on the spec page linked above.

回答2:

Use the flex-direction attribute.

.container { flex-direction: row | row-reverse | column | column-reverse; }

refer flowing article : http://fend-tricks.com/flexbox-intro/