Question

我的Rails生成的bootstrap网页中的标题图片使用Chrome / firefox / Opera正确调整大小，但不能使用Mobile Safari调整大小。我在标题

中有以下元标记

      <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
      <meta name="apple-mobile-web-app-capable" content="yes">

这是HTML和CSS：

<!-- This is the Html -->
<div class="section section-fill-height">
  <div class="background-image background-image-fixed" style="background-image : url('sample1.jpg')"></div>
 </div>

 /* And this is the CSS  */
 .section {
 position:relative;
  }

  .section-fill-height {
  display: flex;
  height:100%;        
  align-items: center;
   }

   .section .background-image {
    z-index:-1;
    position:absolute;
    top: 0px;
    left: 0px;
    width:100%;
    height:100%;
    background-size: cover;
    background-position: center;
    }

    .section .background-image.background-image-fixed {
    background-attachment: fixed;
    }

Answer 1

在Mobile Safari中，您必须将背景图像设置为background-attachment: fixed。使用background-size: cover的背景图片无法在Mobile Safari中正常显示。 Mobile Safari无法将background-attachment: fixed与/*=============================================================== Various fixes for mobile devices ===============================================================*/ /* Detect if mobile device */ (function(a){(jQuery.browser=jQuery.browser||{}).mobile=/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od|ad)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0,4))})(navigator.userAgent||navigator.vendor||window.opera); if(jQuery.browser.mobile){ /* Adjust body class */ $("body").addClass("mobile-fix"); }结合使用，因为Mobile Safari不会像您期望的那样调整背景图片的大小（与其他浏览器的方式相同）。

以下可能不是最佳解决方案，但它有效：在你的javascript（jQuery）中，执行以下操作：

body.mobile-fix .section .background-image.background-image-fixed {
background-attachment: scroll !important;
}

在你的CSS中：

class Game extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      ...
    };
  }

  reset() {
    var node = ReactDOM.findDOMNode(this),
        ComponentName = this.constructor.name;
    if (node) {
      ReactDOM.unmountComponentAtNode(node);
      ReactDOM.render(<ComponentName />, node);
    }
  }

  ...
}

标题图片没有在移动设备上调整大小， - 仍然完全缩小

1 个答案: