Question

我正在尝试使用flexbox将导航栏与4个按钮对齐，但我无法使用justify-content和align-items都设置为居中的方式使它们与中心对齐，感觉我缺少了一些东西，但是可以t弄清楚是什么。

我尝试将每个按钮都包装成一个，但无济于事。

HTML：

<!DOCTYPE html>
<html>
<body>
<nav id='nav'>
<span class='button'><button type='button'>Button1</button></span>
<span class='button'><button type='button'>button 2</button></span>
<span class='button'><button type='button'>Button 3</button></span>
<span class='button'><button type='button'>button 4</button></span>
</nav>
</body>
</html>

CSS：

nav {
display: flex;
}

.button {
justify-content: center;
align-items: center;
}

Answer 1

在flex容器上放置flex选项

<body>
  <nav id='nav'>
    <span class='button'><button type='button'>Button1</button></span>
    <span class='button'><button type='button'>button 2</button></span>
    <span class='button'><button type='button'>Button 3</button></span>
    <span class='button'><button type='button'>button 4</button></span>
  </nav>
</body>

var WIDTH = 250,
  HEIGHT = 250,
  BACKGROUND = 0xcccccc;

var gl1 = new THREE.WebGLRenderer({
    antialias: true,
    logarithmicDepthBuffer: false
  }),
  gl2 = new THREE.WebGLRenderer({
    antialias: true,
    logarithmicDepthBuffer: true
  }),
  scene1 = new THREE.Scene(),
  scene2 = new THREE.Scene(),
  s1pCam = new THREE.PerspectiveCamera(
    28,
    WIDTH / HEIGHT,
    1,
    1000
  ),
  s1oCam = new THREE.OrthographicCamera(-1 * (WIDTH / HEIGHT),
    1 * (WIDTH / HEIGHT),
    1, -1,
    1,
    1000),
  aLight1 = new THREE.AmbientLight(0x333333),
  dLight1 = new THREE.DirectionalLight(0xffffff, 0.75);

s1pCam.position.set(0, 0, 100);
s1pCam.lookAt(scene1.position);
s1oCam.position.set(0, 0, 100);
s1oCam.lookAt(scene1.position);
dLight1.position.set(0, 0, 100);
dLight1.lookAt(new THREE.Vector3(0, 0, -1));

// calculate ortho frustum
var modelCenter = new THREE.Vector3(),
  tmpCamPosition = s1pCam.position.clone(),
  camTarget = new THREE.Vector3(),
  radFOV = (Math.PI / 180.) * s1pCam.fov;
modelCenter.sub(camTarget);
tmpCamPosition.sub(camTarget);
var projectedLocation = modelCenter.projectOnVector(tmpCamPosition);
var distance = tmpCamPosition.distanceTo(projectedLocation);
var halfHeight = Math.tan(radFOV / 2.) * distance;
var halfWidth = halfHeight * s1pCam.aspect;
s1oCam.left = -halfWidth;
s1oCam.right = halfWidth;
s1oCam.top = halfHeight;
s1oCam.bottom = -halfHeight;
s1oCam.zoom = s1pCam.zoom;
s1oCam.updateProjectionMatrix();

var s2pCam = s1pCam.clone(),
  s2oCam = s1oCam.clone(),
  aLight2 = aLight1.clone(),
  dLight2 = dLight1.clone();

s2pCam.near = 1e-6;
s2pCam.far = 1e27;
s2oCam.near = 1e-6;
s2oCam.far = 1e27;

scene1.add(s1pCam);
scene1.add(s1oCam);
scene1.add(aLight1);
scene1.add(dLight1);
scene1.add(new THREE.Mesh(new THREE.TorusKnotGeometry(10, 4, 100, 32), new THREE.MeshPhongMaterial({
  color: 'red'
})));

scene2.add(s2pCam);
scene2.add(s2oCam);
scene2.add(aLight2);
scene2.add(dLight2);
scene2.add(new THREE.Mesh(new THREE.TorusKnotGeometry(10, 4, 100, 32), new THREE.MeshPhongMaterial({
  color: 'green'
})));

document.getElementById("view1").appendChild(gl1.domElement);
document.getElementById("view2").appendChild(gl2.domElement);

gl1.setSize(WIDTH, HEIGHT);
gl1.setClearColor(BACKGROUND);

gl2.setSize(WIDTH, HEIGHT);
gl2.setClearColor(BACKGROUND);

gl1.render(scene1, s1pCam);
gl2.render(scene2, s2pCam);

function handleCameraChanges(e) {
  debugger;
  if (gl1 && e.target.id.indexOf("1") !== -1) {
    gl1.render(scene1, (e.target.id.indexOf("p") !== -1) ? s1pCam : s1oCam);
  } else if (gl2) {
    gl2.render(scene2, (e.target.id.indexOf("p") !== -1) ? s2pCam : s2oCam);
  }
}

document.getElementById("v1p").addEventListener("click", handleCameraChanges);
document.getElementById("v1o").addEventListener("click", handleCameraChanges);
document.getElementById("v2p").addEventListener("click", handleCameraChanges);
document.getElementById("v2o").addEventListener("click", handleCameraChanges);

无法使用Flexbox对齐项和对齐内容使按钮居中

1 个答案: