<text bindtap='tapScan'>Scan</text>

<form bindsubmit='firstSubmit' id="main">

<input type='text' name='dest' value='{{addr}}' focus='true' disabled='{{disable}}' />

<button formType='submit' hover-class='hoverBtn'>Button</button>

</form>

Page({

data: {

            addr: '',

            disable: false

},

tapScan() {

    var me = this

    wx.scanCode({

        scanType: ['qrCode'],

        success: function(res) {

            console.log(res)

            me.setData({

                addr: res.result

            })

        }

    })

}

})

扫任意二维码后给input 赋值:

1. input disabled 属性为变量或不标示disabled 属性时，input value 均无法显示，是个空白，但 form submit 可取得value

2. 当 input 写死 disabled=‘{{true}}’ 时，value 可以显示

机型: iphone 6 plus,  ios12

代码段：

wechatide://minicode/eO23BKmy7b2c