小程序input组件的bindinput事件获取不到值

例：

<input class='btn' type="number" placeholder='被推荐人的手机号码' maxlength='11' value="{{mobile}}" bindinput ="mobileInput" placeholder-class="placeholderStyle"></input>

mobileInput: function (e) {

console.log(e.detail.value);

this.setData({

recMobile: e.detail.value

})

},