[LayaAir 2.0]Laya.LocalStorage.getJSON空对象在微信小游戏中被处理为空字符串

var equipDataArray = Laya.LocalStorage.getJSON('equipDataArray');
如果getJSON为空，在LayaAir IDE中获取的是null，而在微信小游戏中获取的是''; 

getLocalStorage() {

		//清除本地存储 调试时取消下面一行的注释

		Laya.LocalStorage.clear();



		//获取当前武器配置

		var equipDataArray = Laya.LocalStorage.getJSON('equipDataArray');



		console.log('equipDataArray ', equipDataArray, ' |');



		if (equipDataArray === null) {

			equipDataArray = [

				{ icon: 'img/weapon/gun0.png', weaponIndex: 0, weaponGrade: 1 },

				{ icon: 'img/weapon/gun1.png', weaponIndex: 1, weaponGrade: 1 },

				{ icon: 'img/weapon/gun2.png', weaponIndex: 2, weaponGrade: 1 },

				{ icon: 'img/weapon/gun3.png', weaponIndex: 3, weaponGrade: 1 },

				{ icon: 'img/weapon/gun4.png', weaponIndex: 4, weaponGrade: 1 },

				{ icon: 'img/weapon/gun5.png', weaponIndex: 5, weaponGrade: 1 },

			];

			Laya.LocalStorage.setJSON('equipDataArray', equipDataArray);

		}



		console.log('equipDataArray[4].weaponIndex = ', equipDataArray[4].weaponIndex);

	}

因此，上面这段代码在微信小游戏中执行会报错，提示weaponIndex是undefined对象的属性；
为了避免这个错误被触发，应该同时判断
if (equipDataArray === null || equipDataArray.length === 0) 
这样在IDE和微信开发工具中就都可以正常运行了。