【报Bug】IOS UIActivityViewController不生效

示例代码：

var UIPasteboard = plus.ios.importClass("UIPasteboard");    
            var generalPasteboard = UIPasteboard.generalPasteboard();    
            generalPasteboard.plusCallMethod({setValue: msg.title, forPasteboardType: "public.utf8-plain-text"});    
            // generalPasteboard.plusCallMethod({valueForPasteboardType:"public.utf8-plain-text"});    

            var NSURL = plus.ios.import('NSURL');    
            var NSData = plus.ios.import("NSData");    
            var UIImage = plus.ios.import("UIImage");    
            var NSArray = plus.ios.import("NSMutableArray");    
            var activityItems = NSArray.arrayWithCapacity(10);    

            msg.pictures.forEach(item => {    
                var imageUrl = NSURL.URLWithString(item)    
                var data = NSData.dataWithContentsOfURL(imageUrl);    
                var localImage = UIImage.imageWithData(data);    
                activityItems.addObject(localImage);    
            });    

            var UIActivityViewController = plus.ios.importClass("UIActivityViewController");    
            var activityVC = new UIActivityViewController();    
            var activity = plus.ios.invoke(activityVC, "initWithActivityItems:applicationActivities:", activityItems, null);    
            console.log("activity == ");    
            console.log(activity);    
            var UIApplicationClass = plus.ios.importClass("UIApplication");    
            var UIAppObj = UIApplicationClass.sharedApplication();    
            var del = plus.ios.invoke(UIAppObj, "delegate");    
            var appWindowObj = plus.ios.invoke(del, "window");    
            var appRootController = plus.ios.invoke(appWindowObj, "rootViewController");    
            console.log("appRootController == ");    
            console.log(appRootController);    
            plus.ios.invoke(appRootController, "presentViewController:animated:completion:", activity, "YES", null);

操作步骤：

执行代码

预期结果：

能弹窗系统分享

实际结果：

没弹窗也没报错