JS实现文字头像生成的两种方案与代码示例

function gen_text_img(size, s) {
 let colors = [
 "rgb(239,150,26)", 'rgb(255,58,201)', "rgb(111,75,255)", "rgb(36,174,34)", "rgb(80,80,80)"
 ];
 let cvs = document.createElement("canvas");
 cvs.setAttribute('width', size[0]);
 cvs.setAttribute('height', size[1]);
 let ctx = cvs.getContext("2d");
 ctx.fillStyle = colors[Math.floor(Math.random()*(colors.length))];
 ctx.fillRect(0, 0, size[0], size[1]);
 ctx.fillStyle = 'rgb(255,255,255)';
 ctx.font = size[0]*0.6+"px Arial";
 ctx.textBaseline = "middle";
 ctx.textAlign = "center";
 ctx.fillText(s,size[0]/2,size[1]/2);

 return cvs.toDataURL('image/jpeg', 1);
}

// 获取名字第一个文字，转换成16进制颜色值
const { name } = this.props;
let firstName = name.substring(1, 0);
 
tranColor = (name) => {
 var str ='';
 for(var i=0; i<name.length; i++) {
  str += parseInt(name[i].charCodeAt(0), 10).toString(16);
 }
 return '#' + str.slice(1, 4);
}
const bgColor = this.tranColor(name)