React圆环SemiCircle代码importReactfrom"react";classSemiCircleextendsReact.Component{constructor(props){super(props);}polarToCartesian=(centerX,centerY,radius,angleInDegrees)=>{varangleInRadians=((angleInDegrees-180)*Math.PI)/180;返回{x:centerX+radius*Math.cos(angleInRadians),y:centerY+radius*Math.sin(angleInRadians)};};describeArc=(x,y,radius,startAngle,endAngle)=>{varstart=this.polarToCartesian(x,y,radius,endAngle);varend=this.polarToCartesian(x,y,radius,startAngle);varlargeArcFlag=endAngle-startAngle<=180?“0”：“1”；vard=["M",start.x,start.y,"A",radius,radius,0,largeArcFlag,0,end.x,end.y].join("");返回d;};render(){const{size,scoreSafe,strokeColor,safeText}=this.props;constgradient=strokeColor=>{if(!strokeC颜色）返回；让arr=strokeColor.map((item,index)=>{让{offset,color,opacity}=item;return(
