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GestureDetect 手势检测扩展：识别滑动、点击和长按手势 · App Inventor 2 中文网
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控制媒体播放：
当 GestureDetect1.onSwipeLeft 时
快进视频
当 GestureDetect1.onSwipeRight 时
快退视频
当 GestureDetect1.onSwipeUp 时
增加音量
当 GestureDetect1.onSwipeDown 时
减少音量
当 GestureDetect1.onDoubleClick 时
播放/暂停
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How to stop creating .DS_Store on Mac? [closed]
...ted the creation
of .DS_Store files on both Snow Leopard and Lion.
DeathToDSStore source code
NOTE: On 10.11 you can not inject code into system apps.
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How to do URL decoding in Java?
...at article too balusc.blogspot.in/2009/05/unicode-how-to-get-characters-right.html
– crackerplace
Jul 16 '14 at 20:32
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map vs. hash_map in C++
... search tree (usually a red/black tree).
An unordered_map should give slightly better performance for accessing known elements of the collection, but a map will have additional useful characteristics (e.g. it is stored in sorted order, which allows traversal from start to finish). unordered_map wi...
Checking if a list is empty with LINQ
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List.Count is O(1) according to Microsoft's documentation:
http://msdn.microsoft.com/en-us/library/27b47ht3.aspx
so just use List.Count == 0 it's much faster than a query
This is because it has a data member called Count which is updated any time something is added or removed fro...
Safari 3rd party cookie iframe trick no longer working?
...?php
// START SAFARI SESSION FIX
session_start();
$page_url = "http://www.facebook.com/pages/.../...?sk=app_...";
if (isset($_GET["start_session"]))
die(header("Location:" . $page_url));
if (!isset($_GET["sid"]))
die(header("Location:?sid=" . session_id()));
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App Inventor 2 拓展参考文档 · App Inventor 2 中文网
... 拓展：通过麦克风测量声音的音调高低（单位：Hz）
【视频播放器】 Plyr视频播放器拓展：全屏、画质、字幕、缩略图、强大的用户界面
【音频播放器】 TaifunPlayer 扩展（Audio Player）：音频播放器扩展，支持流媒体播放控制
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Detect iPad users using jQuery?
...ri
iPad: Mozilla/5.0 (iPad; CPU OS 5_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B176 Safari/7534.48.3
iPhone: Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3
# UIWebView
iPad: Moz...
What is the Swift equivalent to Objective-C's “@synchronized”?
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With this approach you need to be careful. Your block might be executed on some other thread. API docs say: "As an optimization, this function invokes the block on the current thread when possible."
– bio
Sep 24 '15 at 17:57
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How can a web application send push notifications to iOS devices? [closed]
...aging functions on the iPhone.
See these links provided by Peter Hosey:
https://support.apple.com/kb/HT201925
https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/APNSOverview.html
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