Question

我试图编写一个代码“＃34;闪烁＆＃34;锁定键的速度非常快（使用-comObject to sendkeys）。 Powershell（来自CMD）的代码运行速度非常慢，并且错过了一些按键，但似乎在Powershell_ise上运行得很好。

代码将文件读取为二进制文件，然后将每个位传输到num / scroll lock。这需要尽快运行 - 尽可能快。

这是代码：

-(instancetype) initWithName:(NSString *)name
{
    self =[super init];
    if (self) {
        bookName = [NSString stringWithString:name];
        book=[NSMutableArray array];
        resultOfLookup = [NSMutableArray array]; // add this line.
}
    return self;
}

任何人都知道为什么会这样？

编辑：我添加了一个视频，显示锁定键在Powershell Console Vs上闪烁的延迟。 Powershell_ISE http://youtu.be/OnOmr50OBhs

我在Windows 7上的Powershell V3.0 / 4.0上试过这个

我使用了这个文本文件名 - ＆＃39; temp1536.txt＆＃39;在％temp％文件夹中该文件将导入二进制文件，然后相应地点亮LED。

$wsh = New-Object -ComObject "WScript.Shell"
$bytes = [Byte[]] (Get-Content  $env:temp\temp1536.txt -Encoding Byte -ReadCount 0) | ForEach-Object {[System.Convert]::ToString($_,2)}
##($i=0; $i -le $byte.length; $i++){

 foreach ($byte in $bytes) {
 #$byte;
   while($byte.length -ne 1 ){
    if($byte[1] -eq '1'){
        #echo "1";
        $wsh.SendKeys('{SCROLLLOCK}');
        [System.Threading.Thread]::Sleep(40);   
        $wsh.SendKeys('{SCROLLLOCK}');
    } Else {
        #echo "0";
        $wsh.SendKeys('{NUMLOCK}');
        [System.Threading.Thread]::Sleep(40);
        $wsh.SendKeys('{NUMLOCK}');
    }
    $byte=$byte.Substring(1);
    [System.Threading.Thread]::Sleep(50);


   }
   #echo " ";
   #echo "1";

   $wsh.SendKeys('{CAPSLOCK}');
   [System.Threading.Thread]::Sleep(55);

   $wsh.SendKeys('{CAPSLOCK}');
   [System.Threading.Thread]::Sleep(20);

 }

Answer 1

I couldn't get your code working (it never steps into if($byte[1] -eq '1')), but here is the version using keybd_event\GetKeyState Win32 API that works fine in my ISE and console. Adapted from code posted here.

$Keyboard = @'
using System.Runtime.InteropServices;

namespace My
{
    public class Keyboard
    {
        private const byte VK_SCROLL = 0x91;
        private const byte VK_NUMLOCK = 0x90;
        private const byte VK_CAPITAL = 0x14;
        private const uint KEYEVENTF_KEYUP = 0x2;

        [DllImport("user32.dll", EntryPoint = "keybd_event", SetLastError = true)]
        static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, uint dwExtraInfo);

        [DllImport("user32.dll", EntryPoint = "GetKeyState", SetLastError = true)]
        static extern short GetKeyState(uint nVirtKey);

        // SCROLLLOCK
        public static void SetScrollLockKey(bool newState)
        {
            bool scrollLockSet = GetKeyState(VK_SCROLL) != 0;
            if (scrollLockSet != newState)
            {
                keybd_event(VK_SCROLL, 0, 0, 0);
                keybd_event(VK_SCROLL, 0, KEYEVENTF_KEYUP, 0);
            }
        }
        public static bool GetScrollLockState()
        {
            return GetKeyState(VK_SCROLL) != 0;
        }

        // NUMLOCK
        public static void SetNumLockKey(bool newState)
        {
            bool scrollLockSet = GetKeyState(VK_NUMLOCK) != 0;
            if (scrollLockSet != newState)
            {
                keybd_event(VK_NUMLOCK, 0, 0, 0);
                keybd_event(VK_NUMLOCK, 0, KEYEVENTF_KEYUP, 0);
            }
        }

        public static bool GetNumLockState()
        {
            return GetKeyState(VK_NUMLOCK) != 0;
        }

        // CAPSLOCK
        public static void SetCapsLockKey(bool newState)
        {
            bool scrollLockSet = GetKeyState(VK_NUMLOCK) != 0;
            if (scrollLockSet != newState)
            {
                keybd_event(VK_CAPITAL, 0, 0, 0);
                keybd_event(VK_CAPITAL, 0, KEYEVENTF_KEYUP, 0);
            }
        }

        public static bool GetCapsLockState()
        {
            return GetKeyState(VK_CAPITAL) != 0;
        }
    }
}
'@

Add-Type -TypeDefinition $Keyboard -ErrorAction Stop

$Bytes = Get-Content -Path '.\led.txt' -Encoding Byte

foreach ($byte in $Bytes) {
    if($byte)
    {
        [My.Keyboard]::SetScrollLockKey($true)
        [System.Threading.Thread]::Sleep(40)
        [My.Keyboard]::SetScrollLockKey($false)
    }
    else
    {
        [My.Keyboard]::SetNumLockKey($true)
        [System.Threading.Thread]::Sleep(40)
        [My.Keyboard]::SetNumLockKey($false)
    }

    [My.Keyboard]::SetCapsLockKey($true)
    [System.Threading.Thread]::Sleep(55)

    [My.Keyboard]::SetNumLockKey($false)
    [System.Threading.Thread]::Sleep(20)
}

Answer 2

这似乎只是某些PC的问题。真的不明白为什么。但是我让它在某些计算机上运行良好。

Powershell代码在powershell_ise上运行良好，但在powershell上有所突破

2 个答案: