onLoad(){
    
    wx.onMemoryWarning(function (res) {
        wx.showModal({
            title: '提示',
            content: '内存不足了，请退出小程序后重新进入',
            success (res1) {
                if (res1.confirm) {
                    console.log('用户点击确定')
                } else if (res1.cancel) {
                    console.log('用户点击取消')
                }
            }
        })
        console.log('onMemoryWarningReceive', res)
    })

}
并沒有任何提示，应该说明内存还是足够的吧