setData赋值不渲染？

	onShow: function() {
		//var _this=this;
		console.log(wx.getStorageSync('CARD'))
		 var wb=this.data.WebSocket;
		 wb.card=wx.getStorageSync('CARD');
		this.setData({
			WebSocket:wb
		})
		console.log(this.data.WebSocket)