rules:{
  newPassword: [{validator:(rule,newPassword,callback)=>{
      var all = false
      if(newPassword == ‘‘){
      　　callback(new Error("请输入密码"));
      }else{
         var str = "" 
         for(var i=0;i<newPassword.length;i++){
　　　　　　　　str = newPassword.charCodeAt(i)
             if(str > 65280 &&  str < 65375 || str == 12288){
                 all = true
             }
         }
         if(all == true){
             callback(new Error("请输入半角字符"));
         }else{
             callback()
         }
      }
    }, trigger:‘blur‘}]  
}