如何在ReactJS中将特定的div放入全屏（全窗口大小）

时间：2019-02-18 06:08:01

标签： reactjs fullscreen

由于我是新手，所以我正在ReactJs中创建图像查看器，所以我停留在某个地方。实际上我必须添加一个全屏选项。当用户单击任何特定图像时，该图像是打开的，并且有一个类似next，prev，close，rotate和全屏的选项（即使用浏览器的高度和宽度），因此当用户单击全屏时，该特定图像将获得完整的图像。窗口大小和用户仍然可以选择如rotate，next.close和prev。我搜索了很多解决方案，但没有任何效果。

我尝试了很多事情，但是它只对整个屏幕进行全屏显示，但是我希望.center-image可以像我所说的那样全屏显示。这是画廊模式成分。

class GalleryModal extends React.Component {
        constructor(props) {
          super(props);

          this.state = {
            rotation: 0
          };
          this.rotate = this.rotate.bind(this);
        }

        render() {
          const { rotation } = this.state;
          if (this.props.isOpen === false) {
            return null;
          }

          return (
            <div className="modal-overlay" name={this.props.name}>
              <div className="modal-body">
                <a href="#" className="button" onClick={() => this.rotate()}>
                  <i className="fas fa-sync-alt" />
                </a>
                <a href="#" className="button" onClick={this.props.onPrev}>
                  <i className="fas fa-angle-left" />
                </a>
                <img
                  className="center_image"
                  id="image"
                  src={this.props.src}
                  style={{ transform: `rotate(${rotation}deg)` }}
                />
                <a href="#" className="button" onClick={this.props.onNext}>
                  <i className="fas fa-angle-right" />
                </a>
                <a
                  className="modal-close"
                  href="#"
                  onClick={this.props.onClick}
                >
                  <span className="fa fa-times" />
                </a>
              </div>
            </div>
          );
        }
        rotate() {
          let newRotation = this.state.rotation + 90;
          if (newRotation >= 360) {
            newRotation = -360;
          }
          this.setState({
            rotation: newRotation
          });
        }
      }

Full code

这是我的代码，我很困惑如何添加全屏选项以及添加位置。

2 个答案:

答案 0 :(得分：2)

我建议使用css视口单位，将组件设置为高度：100vh和宽度：100vw将使其全屏显示。然后，根据您希望全屏显示的时间来有条件地渲染该组件。

答案 1 :(得分：1)

必须使用一些css技巧，但是我相信这是您要实现的目标。图像居中并占据窗口内可用的最大宽度；但是，如果您拉伸窗口，它将向上调整其宽度，直到达到最大宽度为止（不建议将其拉伸超过其最大值，否则会出现像素化）。

我确实通过将state和类methods提升为单个container以及使用setState() callbacks来简化您的代码state更有效，ternary operator（cond ? true : false）代替了简单的if/else条件语句。

工作示例：https://codesandbox.io/s/zr5k7v0zp3

容器/图库/Gallery.js 

import React from "react";
import GalleryImages from "../../components/GalleryImages/galleryImages";
import GalleryModal from "../../components/GalleryModal/galleryModal";

const imgUrls = [
  "https://source.unsplash.com/3Z70SDuYs5g/800x600",
  "https://source.unsplash.com/01vFmYAOqQ0/800x600",
  "https://source.unsplash.com/2Bjq3A7rGn4/800x600",
  "https://source.unsplash.com/t20pc32VbrU/800x600",
  "https://source.unsplash.com/pHANr-CpbYM/800x600",
  "https://source.unsplash.com/3PmwYw2uErY/800x600",
  "https://source.unsplash.com/uOi3lg8fGl4/800x600",
  "https://source.unsplash.com/CwkiN6_qpDI/800x600",
  "https://source.unsplash.com/9O1oQ9SzQZQ/800x600",
  "https://source.unsplash.com/E4944K_4SvI/800x600",
  "https://source.unsplash.com/-hI5dX2ObAs/800x600",
  "https://source.unsplash.com/vZlTg_McCDo/800x600"
];

export default class Gallery extends React.Component {
  constructor(props) {
    super(props);

    this.state = {
      imgIndex: 0,
      imgUrlLength: imgUrls.length,
      showModal: false,
      rotation: 0
    };

    this.openModal = this.openModal.bind(this);
    this.closeModal = this.closeModal.bind(this);
    this.nextClick = this.nextClick.bind(this);
    this.prevClick = this.prevClick.bind(this);
    this.rotateImage = this.rotateImage.bind(this);
  }

  openModal(index) {
    this.setState({
      showModal: true,
      imgIndex: index
    });
  }

  closeModal() {
    this.setState({
      showModal: false,
      imgIndex: 0,
      rotation: 0
    });
  }

  nextClick() {
    this.setState(prevState => {
      return {
        imgIndex:
          prevState.imgIndex === prevState.imgUrlLength - 1
            ? 0
            : prevState.imgIndex + 1
      };
    });
  }

  prevClick() {
    this.setState(prevState => {
      return {
        imgIndex:
          prevState.imgIndex === 0
            ? prevState.imgUrlLength - 1
            : prevState.imgIndex - 1
      };
    });
  }

  rotateImage() {
    this.setState(prevState => {
      return {
        rotation: prevState.rotation + 90 <= 270 ? prevState.rotation + 90 : 0
      };
    });
  }

  render() {
    return (
      <div className="container-fluid gallery-container">
        <GalleryImages imgUrls={imgUrls} openModal={this.openModal} />
        <GalleryModal
          isOpen={this.state.showModal}
          onClick={this.closeModal}
          onNext={this.nextClick}
          onPrev={this.prevClick}
          rotateImage={this.rotateImage}
          rotation={this.state.rotation}
          src={imgUrls[this.state.imgIndex]}
        />
      </div>
    );
  }
}

components / GalleryImages / galleryImages.js 

import React from "react";
import PropTypes from "prop-types";

const GalleryImages = ({ imgUrls, openModal }) => {
  return (
    <div className="row">
      {imgUrls.map((url, index) => {
        return (
          <div key={index} className="col-sm-6 col-md-3 col-xl-2">
            <div className="gallery-card">
              <img
                key={index}
                className="gallery-thumbnail"
                src={url}
                alt={`Image number ${index + 1}`}
              />

              <span
                className="card-icon-open fa fa-expand"
                onClick={() => openModal(index)}
              />
            </div>
          </div>
        );
      })}
    </div>
  );
};

GalleryImages.propTypes = {
  imgUrls: PropTypes.arrayOf(PropTypes.string).isRequired,
  openModal: PropTypes.func.isRequired
};

export default GalleryImages;

components / GalleryModal / galleryModal.js 

import React from "react";
import PropTypes from "prop-types";

const GalleryModal = ({
  isOpen,
  onClick,
  onNext,
  onPrev,
  rotateImage,
  rotation,
  src
}) => {
  return isOpen ? (
    <div className="modal-overlay">
      <div className="modal-body">
        <div className="close-modal">
          <a className="modal-close" href="#" onClick={onClick}>
            <span className="fa fa-times" />
          </a>
        </div>
        <div className="rotate-container">
          <a href="#" className="button" onClick={rotateImage}>
            <i style={{ fontSize: 44 }} className="fas fa-sync-alt" />
          </a>
        </div>
        <div className="image-container">
          <div>
            <a href="#" className="button" onClick={onPrev}>
              <i className="fas fa-angle-left" />
            </a>
          </div>
          <div>
            <img
              src={src}
              style={{ transform: `rotate(${rotation}deg)`, width: "100%" }}
            />
          </div>
          <div>
            <a href="#" className="button" onClick={onNext}>
              <i className="fas fa-angle-right" />
            </a>
          </div>
        </div>
      </div>
    </div>
  ) : null;
};

GalleryModal.propTypes = {
  isOpen: PropTypes.bool.isRequired,
  onClick: PropTypes.func.isRequired,
  onNext: PropTypes.func.isRequired,
  onPrev: PropTypes.func.isRequired,
  rotateImage: PropTypes.func.isRequired,
  rotation: PropTypes.number.isRequired,
  src: PropTypes.string
};

export default GalleryModal;

styles.css 

html,
body {
  min-height: 100%;
  height: 100%;
}
html {
  font-size: 16px;
}
body {
  position: relative;
  font-size: 100%;
}
.button {
  font-size: 50px;
  color: #eee;
  margin: 5px;
}
.card-icon-open {
  display: block;
  position: relative;
  left: 45%;
  top: 35px;
  font-size: 30px;
  width: 30px;
  color: #fff;
  cursor: pointer;
  opacity: 0;
  transform: translate(0%, -400%);
  transition: all 0.25s ease-in-out;
}
.card-icon-open:focus,
.card-icon-open:hover {
  color: #111;
}
.close-modal {
  position: fixed;
  top: 0;
  right: 5px;
}
.fullscreen {
  position: relative;
  text-decoration: none;
  font-size: 25px;
  color: #eee;
  z-index: 999;
}
.fullscreen:hover,
.fullscreen:focus,
.fullscreen:blur {
  text-decoration: none;
  color: red;
}
.gallery-container {
  padding-top: 10px;
}
.gallery-card {
  position: relative;
  overflow: hidden;
  margin-bottom: 10px;
}
.gallery-thumbnail {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}
.gallery-thumbnail:focus ~ .card-icon-open,
.gallery-thumbnail:hover ~ .card-icon-open,
.gallery-thumbnail ~ .card-icon-open:focus,
.gallery-thumbnail ~ .card-icon-open:hover {
  opacity: 1;
}
.image-container {
  display: flex;
  justify-content: center;
  align-items: center;
}
.image-rotate {
  font-size: 44px;
}
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10;
  width: 100%;
  height: 100%;
  background: rgba(21, 21, 21, 0.75);
}
.modal-body {
  position: relative;
  top: 15%;
  z-index: 11;
  padding: 0;
  overflow: hidden;
  max-width: 100%;
  max-height: 100%;
}
.modal-close {
  font-size: 44px;
  z-index: 99;
  color: #eee;
  transition: all 0.25s ease-in-out;
}
.modal-close:focus,
.modal-close:hover {
  color: red;
}
.rotate-container {
  font-size: 44px;
  position: fixed;
  top: 0;
  left: 5px;
}
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