device

问题 When I tried to build and run, Xcode said my device was locked. I looked at my iPhone, and it's not locked at all. How do I fix this? 回答1: Did you by chance not "trust" the device? This will prevent it from communicating with xcode even if the device is unlocked. Update here's a support doc from Apple: http://support.apple.com/en-us/HT5868 回答2: My phone was set to "trust" the Mac, and I still ran into this error with Xcode 6.1.1. This worked for me: unplug device quit xcode open xcode plug in

问题 I'm having a problem trying to change my camera in real time, It works for the local video, but the remote person cannot see the new camera, and still sees the old one. I tried to stop the stream and init again but still not working. This is just some of my code. I have searched everywhere and I can't find a solution. Can someone help me out? function init() { getUserMedia(constraints, connect, fail); } $(".webcam-devices").on('change', function() { var deviceID = this.value; constraints

问题 I'm having a problem trying to change my camera in real time, It works for the local video, but the remote person cannot see the new camera, and still sees the old one. I tried to stop the stream and init again but still not working. This is just some of my code. I have searched everywhere and I can't find a solution. Can someone help me out? function init() { getUserMedia(constraints, connect, fail); } $(".webcam-devices").on('change', function() { var deviceID = this.value; constraints

问题 I would like to check a network devices status e.g. promiscous mode. Basically like shown with ip a command. Maybe someone could push me in the right direction? I want to do this in C for linux so linux specific headers are available. 回答1: You need to use the SIOCGIFFLAGS ioctl to retrieve the flags associated with an interface. You can then check if the IFF_PROMISC flag is set: #include <stdlib.h> #include <stdio.h> #include <string.h> #include <sys/ioctl.h> /* ioctl() */ #include <sys

问题 I am developing a C# .NET 2.0 application wherein I need to scan for an attached HID. How can this be done? Because it is a HID, Windows does not assign a COM port to it. I only need to programmatically determine if the device is attached. Thank you. ADDITIONAL INFORMATION When I connect the USB device to my computer two entries appear under Human Interface Devices in the Device Manager. Clicking into their Properties yields this information in their respective Details tabs: HID-compliant

问题 I'm searching for a way to detect the device my app is running on. I am not interested in software version. I searched many questions but none of them (surprisingly) satisfy my needs for following reasons: Solution 1: NSString *deviceType = [UIDevice currentDevice].model; This does not work because it gives me just "iPad". I want to know whether it is iPad, iPad 2, new iPad, iPhone 3GS, iPhone4 etc. Solution 2: Not testing for device type, checking for individual capabilities This does not

问题 I have a Python script that reads a file (typically from optical media) marking the unreadable sectors, to allow a re-attempt to read said unreadable sectors on a different optical reader. I discovered that my script does not work with block devices (e.g. /dev/sr0), in order to create a copy of the contained ISO9660/UDF filesystem, because os.stat().st_size is zero. The algorithm currently needs to know the filesize in advance; I can change that, but the issue (of knowing the block device

问题 How can I autostart my application's service at device boot (with the possibility of enabling/disabling this feature)? What permissions do I have to include in AndroidManifest? Thanks 回答1: this permission are use <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /> In your <application> element (be sure to use a fully-qualified [or relative] class name for your BroadcastReceiver): <receiver android:name="com.example.MyBroadcastReceiver"> <intent-filter> <action android

问题 My android app is not in the app store yet. Is it possible to send my app to someone, and they install it on their device. Something like iphone AdHoc? 回答1: You can email them your APK. Of course, there are several drawbacks to doing this. There is not any built in copy protection to lock an APK to a single device so a tester could redistribute your application without your consent . This is something that you will need to deal with even once you are using Market to distribute your

问题 I am developing an embedded solution using C and I am working with two USB sensors. If I connect each sensor alone they take this names: Device 1 (I do not know why it takes 6 names...) /dev/ttyACM0 /dev/ttyACM1 /dev/ttyACM2 /dev/ttyACM3 /dev/ttyACM4 /dev/ttyACM5 /dev/ttyACM6 Device 2 /dev/ttyACM0 So when I start as an embedded system and both sensors are connected, the fastest one takes /dev/ACM0 but it not always the same. So, when I try to read device 2 I could be reading device 1... I