格式化数字（每几个数字后加一个空格）

onInput = ({ detail }) => {
		const value = detail.value; // 输入的字符串
		const newValue = value.replace(/([^0-9])/g, ''); // 只容许输入数字
		const formatValue = newValue.replace(/(\d{4})(?=\d)/g, '$1 '); // 每4个数字后面加一个空格
		const inputLen = this.getOriginValue().length;
		if (inputLen > this.maxLen) { // 若是输入的字符大于最大输入长度则禁止继续输入
			this.inputRef.inputRef.value = this.state.recharge_phone;
			return;
		}

		const end = () => {
			setTimeout(() => {
				this.end();
			}, 10);
		};

		if (inputLen >= this.minLen) {
			this.setState({ isValidNo: true, recharge_phone: formatValue }, end);
		} else {
			this.setState(
				{ isValidNo: false, recharge_phone: formatValue, activeItem: -1 },
				end
			);
		}

		return formatValue;
	};


　　　　　/**
	 * 移动光标位置到最后面
	 */
	end() {
		const obj = this.inputRef.inputRef;
		const len = this.state.recharge_phone.length;
		if (document.hasOwnProperty('selection')) {
			const sel = obj.createTextRange();
			sel.moveStart('character', len);
			sel.collapse();
			sel.select();
		} else if (
			typeof obj.selectionStart === 'number' &&
			typeof obj.selectionEnd === 'number'
		) {
			obj.selectionStart = obj.selectionEnd = len + 1;
		}
	}

	/**
	 * 获取input的原始值
	 */
	getOriginValue() {
		return this.inputRef.inputRef.value.split(' ').join('');
	}