Merge pull request #40 in ~GUY/fineui from ~WINDY/fineui:master to master

* commit '7b1679a30d61cefef27dca0f33904fd3b66f9c59':
  月份偏移方法

bi/core.js

@@ -6354,6 +6354,20 @@ Date.prototype.getQuarterStartMonth = function () {
     }
     return quarterStartMonth;
 };
+
+//指定日期n个月之前或之后的日期
+Date.prototype.getOffsetMonth = function (n) {
+    var dt = new Date(this.getTime());
+    var day = dt.getDate();
+    var monthDay = new Date(dt.getFullYear(), dt.getMonth() + parseInt(n), 1).getMonthDays();
+    if(day > monthDay){
+        day = monthDay;
+    }
+    dt.setDate(day);
+    dt.setMonth(dt.getMonth() + parseInt(n));
+    return dt;
+};
+
 //获得本季度的起始日期
 Date.prototype.getQuarterStartDate = function () {
     return new Date(this.getFullYear(), this.getQuarterStartMonth(), 1);

docs/core.js

@@ -23834,6 +23834,20 @@ Date.prototype.getQuarterStartMonth = function () {
     }
     return quarterStartMonth;
 };
+
+//指定日期n个月之前或之后的日期
+Date.prototype.getOffsetMonth = function (n) {
+    var dt = new Date(this.getTime());
+    var day = dt.getDate();
+    var monthDay = new Date(dt.getFullYear(), dt.getMonth() + parseInt(n), 1).getMonthDays();
+    if(day > monthDay){
+        day = monthDay;
+    }
+    dt.setDate(day);
+    dt.setMonth(dt.getMonth() + parseInt(n));
+    return dt;
+};
+
 //获得本季度的起始日期
 Date.prototype.getQuarterStartDate = function () {
     return new Date(this.getFullYear(), this.getQuarterStartMonth(), 1);

src/core/proto/date.js

@@ -182,6 +182,20 @@ Date.prototype.getQuarterStartMonth = function () {
     }
     return quarterStartMonth;
 };
+
+//指定日期n个月之前或之后的日期
+Date.prototype.getOffsetMonth = function (n) {
+    var dt = new Date(this.getTime());
+    var day = dt.getDate();
+    var monthDay = new Date(dt.getFullYear(), dt.getMonth() + parseInt(n), 1).getMonthDays();
+    if(day > monthDay){
+        day = monthDay;
+    }
+    dt.setDate(day);
+    dt.setMonth(dt.getMonth() + parseInt(n));
+    return dt;
+};
+
 //获得本季度的起始日期
 Date.prototype.getQuarterStartDate = function () {
     return new Date(this.getFullYear(), this.getQuarterStartMonth(), 1);