重构-加载区域

谁践踏了优雅 2021-07-24 12:30 335阅读 0赞

动画:
    	圆环旋转、圆环虚线运动
    
    实现:
    	圆环使用svg来设置,通过设置圆的实现和虚线距离来产生圆环运动效果
    	使用插槽特性,来指定需要加载的区域
    
    参数:
    	  loading: PropTypes.bool,	   	 是否将区域加载
    	  background:PropTypes.string,   加载背景色,传入具有透明度的rgba颜色
    	  fontSize: PropTypes.string,    加载背景中的字体大小
    	  strokeColor: PropTypes.string, 加载圆环的颜色

效果图:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI5NDU2MA_size_16_color_FFFFFF_t_70]代码示例:  
使用:

import React,{ useState,useEffect} from 'react'
    import Loading from './loading/loading'
    
    function App(){ 
    
      const [loading, setLoading ] = useState(true);
    
    
      useEffect(() => { 
        setTimeout(() => { 
          setLoading(!loading);
        },3000)
      },[])
      
    
      return(
    
        <div
          
        >
          <Loading
            loading={ loading}
          >
            <div style={ { width:'400px'}}>
              <ul>
                <li>哇咔咔</li>
                <li>啊哈哈</li>
                <li>哇啦啦</li>
                <li>哇咔咔</li>
                <li>啊哈哈</li>
                <li>哇啦啦</li>
                <li>哇咔咔</li>
                <li>啊哈哈</li>
                <li>哇啦啦</li>
                <li>哇咔咔</li>
                <li>啊哈哈</li>
                <li>哇啦啦</li>
              </ul>
            </div>
          </Loading>
        </div>
      )
    }
    
    export default App

loading.jsx:

import React,{ useState,useCallback,useRef,useEffect} from 'react'
    import PropTypes from 'prop-types';
    import './loading.css'
    
    function App(props) { 
      
      const loadingf = useRef(null);
    
      useEffect(() => { 
        _styleHandler('background');
        _styleHandler('fontSize');
        _styleHandler('strokeColor');
    
      }, [])
    
      // 统一样式处理
      const _styleHandler = useCallback((key) => { 
        props[key] && loadingf.current.style.setProperty('--' + key, props[key])
        
      }, [])
    
      return(
    
        <div className='jf-loading-container' ref={ loadingf}>
          { props.children}
    
          { props.loading &&
            <div className='jf-loading-mask'>
              <div>
                <svg className='jf-loading-circle-container' xmlns="http://www.w3.org/2000/svg" width='42' height='42' >
                  <circle className='jf-loading-circle'  cx='21' cy='21' r='19' fill='none'></circle>  
                </svg>
              </div>
            
              <span className='jf-loading-text'>
                加载中
              </span>
            </div>
          }
        </div>
      )
    }
    
    App.propTypes = { 
      loading: PropTypes.bool,
      background:PropTypes.string,
      fontSize: PropTypes.string,
      strokeColor: PropTypes.string,
    }
    
    App.defaultProps = { 
      
    }
    
    export default App

loading.css:

.jf-loading-container { 
      display: inline-block;
      box-sizing: border-box;
      position: relative;
    
      --background: rgba(214, 214, 213, 0.9);
      --fontSize: 14px;
      --strokeColor: #409eff;
    }
    .jf-loading-mask { 
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-color: var(--background);
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
    }
    .jf-loading-circle-container { 
      animation: loading-rotate 2s linear infinite;
    }
    .jf-loading-circle { 
      animation: loading-dash 1.5s ease-in-out infinite;
      stroke-dasharray: 90, 150;
      stroke-dashoffset: 0;
      stroke-width: 2;
      stroke: var(--strokeColor);
      stroke-linecap: round;
    }
    
    .jf-loading-text { 
      font-size: var(--fontSize);
    }
    
    @keyframes loading-rotate { 
      100% { 
        transform: rotate(1turn);
      }
    }
    
    @keyframes loading-dash { 
      0% { 
        stroke-dasharray: 1, 200;
        stroke-dashoffset: 0;
      }
      50% { 
        stroke-dasharray: 90, 150;
        stroke-dashoffset: -40px; /*出现圆环进度倒退效果*/
      }
      100% { 
        stroke-dasharray: 90, 150;
        stroke-dashoffset: -120px; /*出现圆环进度倒退效果*/
      }
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI5NDU2MA_size_16_color_FFFFFF_t_70]: /images/20210724/6089ad207e294b81b5387712b562254a.png