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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网
...这里是单字节0x01，表示高电平）
signed - 表示values数据是否是有符号的数值（假表示无符号）
serviceUuid - 服务UUID，通俗来讲它就是硬件的唯一身份ID
characteristicUuid - 特性UUID，通俗来讲它是硬件中某一功能的唯一身份ID
UUID...
Camera access through browser
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The only problem is that, at least on iphone (ios 7.0.4) at least at the moment it creates a temporary image named always 'image.jpg'. So if you upload a few images in the same form, they overwrite each other due to same name unless you do something to rename the...
Exactly what is a “third party”? (And who are the first and second party?)
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Let's take Iphone for example.
Apple by its hardware and software are first party.
End user like me and you are the second party .
the third party is the person who enter this relation like an app developer
that effect me and apple .
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C#位运算符（C#按位与、按位或 等） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...象的值进行非运算，即：如果某一位等于0，就将其转变为1；如果某一位等于1，就将其转变为0。
比如，对二进制的10010001进行位逻辑非运算，结果等于01101110，用十进制表示就是：
~145等于110；对二进制的01010101进行位逻辑非运...
Play/pause HTML 5 video using JQuery
... to control video in this way seems to cause problems with playback on the iPhone. I have the video element in a tab, the jquery reveals this, but then clicking on the video start arrow does not start the clip. When I remove the $('#videoId').get(0).play() line there is no problem. What is the best ...
Xcode 4 hangs at “Attaching to (app name)”
...trying to resolve this after everything you tried from above, try starting iphone simulator, clicking iOS Simulator in menu on top, Reset Contents and Warnings. This will erase all apps from simulator, but now you can finally use simulator!
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presentViewController and displaying navigation bar
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It is true that if you present a view controller modally on the iPhone, it will always be presented full screen no matter how you present it on the top view controller of a navigation controller or any other way around. But you can always show the navigation bar with the following workaro...
to drawRect or not to drawRect (when should one use drawRect/Core Graphics vs subviews/images and wh
...found is usually no. When I first started my game, I was working with the iPhone 3G. As my game grew in complexity, I began to see some lag, but with the newer devices it was completely unnoticeable. Now I have plenty of action going on, and the only lag seems to be a drop in 1-3 fps when playing...
UICollectionView auto scroll to cell at IndexPath
...than once it seems to render the collectionView unscrollable(iOS simulator iPhone 5/iOS 8)
– maz
Oct 20 '14 at 5:19
1
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技术人员如何创业《一》—— 产品及想法 - 资讯 - 清泛网 - 专注C/C++及内核技术
...的学生交友、如何通过熟人关系网络邮件营销、添加用户是否单身的标示（最后这个功能大获成功）。
看到这里其实大家会想到，其实facebook的成功并不是因为他本身产品的技术多么牛，而是他把握好了产品用户的心理、选择...