解决了拖拽跳动的问题

src/module/view.js

@@ -91,6 +91,7 @@ define(function(require, exports, module) {
             function dragEnd(e) {
                 if (!lastPosition) return;
 
+
                 lastPosition = null;
 
                 e.stopPropagation();
@@ -342,33 +343,29 @@ define(function(require, exports, module) {
                     if (kity.Browser.edge) {
                         this.fire('paperrender');
                     }
-
                     if (!selected) return;
 
                     var dragger = this._viewDragger;
                     var view = dragger.getView();
                     var focus = selected.getLayoutBox();
-                    var space = 150;
-                    var tolerance = 150;
-                    var dx = 0,
-                        dy = 0;
+                    var space = 50;
+                    var dx = 0, dy = 0;
 
-                    if (focus.right > view.right - tolerance) {
+                    if (focus.right > view.right) {
                         dx += view.right - focus.right - space;
-                    } else if (focus.left < view.left + tolerance) {
+                    }
+                    else if (focus.left < view.left) {
                         dx += view.left - focus.left + space;
                     }
 
-                    if (focus.bottom > view.bottom - tolerance) {
+                    if (focus.bottom > view.bottom) {
                         dy += view.bottom - focus.bottom - space;
                     }
-                    if (focus.top < view.top + tolerance) {
+                    if (focus.top < view.top) {
                         dy += view.top - focus.top + space;
                     }
 
-                    if (dx || dy) {
-                        dragger.move(new kity.Point(dx, dy));
-                    }
+                    if (dx || dy) dragger.move(new kity.Point(dx, dy), 100);
 
 
                 }