... 摩尔斯电码制作电码谜题，并判断用户输入的答案是否正确。 ↗ 字符串比较比较用户输入和目标文本，再根据结果执行操作。 ↗ 显示随机...

... 方法 IsSupported – 检查加速度传感器是否可用于通过BluetoothDevice属性连接的设备。如果当前没有设备连接，此方法将始终返回false。 ReadAccelerometerData – 从Arduino读取单个加速度传感器数据样本。读取成...

... IsSupported – 检查当前通过BluetoothDevice属性连接的设备是否支持此功能。如果当前没有设备连接，此方法将始终返回false。 ReadGyroscopeData – 从Arduino读取单个陀螺仪数据样本。读取成功后，将触发GyroscopeDataReceived事件。 ...

Now that iPhone 3.0 SDK is public, I think I can ask this question for those of you that have already been playing with the 3.0 SDK. I want to record audio in my application, but I want to use AVAudioRecorder and not the older way of recording like the example SpeakHere shows. There are not any...

...选择菜单里面的Trace→Optimize System，这时候系统会提示是否重新启动，选择启动，重启登录以后什么都别动，过一段时间会自动弹出一个对话框，对话框上写着系统分析等提示信息，你什么都别做，一直等到提示分析完毕，这...

... I benchmarked all the other answers on an iPhone 4S and iPad 3 (release builds). CACurrentMediaTime has the least overhead by a small margin. timeIntervalSince1970 is far slower than the others, probably due to NSDate instantiation overhead, though it may not matter ...

...度"这类逻辑。数值一直是0，先看"可用状态"是否为真，很多廉价手机连光线传感器都没有；有传感器的话，用手电筒贴近屏幕或走窗户边都会让数值跳变。它适合做"黄昏自动切换暗色主题"这类趣味功能，不...

What is considered best practice for animating view transitions on the iPhone? 8 Answers ...

I am programming an iPhone app, and I need to force it to exit due to certain user actions. After cleaning up memory the app allocated, what's the appropriate method to call to terminate the application? ...

...置媒体文件的音乐流派。 有专辑图像 HasAlbumImage 返回是否存在有效的专辑图像。 MIME类型 MimeType 获取或设置媒体文件的 MIME 类型。 超时时间 Timeout 网络加载等待时间（秒）。默认值：3秒。 标题 Title 获取或设置媒体...