HTML代码： <input class='Input' type='number' bindinput='BankCardNoInput' value='{{userInputCardNo}}'></input> js代码： Page({ /**   * 页面的初始数据   */ data: { winHeight: 0, money: '300.00', userInputCardNo2: '', cardlen: 0, }, //输入框的监听事件 BankCardNoInput: function (e) { var card = e.detail.value; var len = card.length; if (len > this.data.cardlen) { if ((len + 1) % 5 == 0) { card = card + '　'; console.log('ok',card) } } else { card = card.replace(/(^\s*)|(\s*$)/g, "") } this.setData({ userInputCardNo: card }) this.setData({ cardlen: len }) },