wx.request({            
        url: detectUrl, 
        templateSign:'。。。。。。。。。。。',           
        data: {                
          image: imageData            
        },            
        method: 'POST',            
        dataType: 'json',            
        header:{                
          'content-type': 'application/x-www-form-urlencoded'        
        },            
        success: function(res, resolve){              
          console.log('get word success：',res.data);              
                                    
        },            
        fail : function(res,reject){              
          console.log('get word fail：',res.data);                 },            
  
      })