uview-plus组件库全面升级更新，订单结算判断支付方式是否可用代码调整，公众号关注二维码修改

uni_modules/uview-plus/libs/function/calc.js

@@ -0,0 +1,64 @@
+// 浮点数加法
+export function add (arg1, arg2) {
+	var r1, r2, m
+		try {
+			r1 = arg1.toString().split('.')[1].length
+		} catch (e) {
+			r1 = 0
+		}
+		try {
+			r2 = arg2.toString().split('.')[1].length
+		} catch (e) {
+			r2 = 0
+		}
+		m = Math.pow(10, Math.max(r1, r2))
+	return (arg1 * m + arg2 * m) / m
+}
+// 浮点数减法
+export function sub (arg1, arg2) {
+	var r1, r2, m, n
+		try {
+		  r1 = arg1.toString().split('.')[1].length
+		} catch (e) {
+		  r1 = 0
+		}
+		try {
+		  r2 = arg2.toString().split('.')[1].length
+		} catch (e) {
+		  r2 = 0
+		}
+		m = Math.pow(10, Math.max(r1, r2))
+		n = (r1 >= r2) ? r1 : r2
+	return Math.abs(((arg1 * m - arg2 * m) / m).toFixed(n))
+}
+//浮点乘法
+export function mul (a, b) {
+	var c = 0,
+		d = a.toString(),
+		e = b.toString();
+	try {
+		c += d.split(".")[1].length;
+	} catch (f) {}
+	try {
+		c += e.split(".")[1].length;
+	} catch (f) {}
+	return Number(d.replace(".", "")) * Number(e.replace(".", "")) / Math.pow(10, c);
+}
+//浮点除法
+export function div (a, b) {
+	var c, d, e = 0,
+		f = 0;
+	try {
+		e = a.toString().split(".")[1].length;
+	} catch (g) {}
+	try {
+		f = b.toString().split(".")[1].length;
+	} catch (g) {}
+	return c = Number(a.toString().replace(".", "")), d = Number(b.toString().replace(".", "")), xyutil.mul(c / d, Math.pow(10, f - e));
+}
+export default {
+	add,
+	sub,
+	mul,
+	div
+}