我这儿有个函数但不清楚 各参数的意义，那个大哥解释下哈？//音量控制
procedure TForm1.TrackBar1Change(Sender: TObject);
var
t,v:Longint;
begin
t:=TrackBar1.Position;
v:=(t shl 8)or(t shl 24);
waveOutSetVolume(0,v);
end;就是 waveOutSetVolume(0,v); 0 和v 是代表什么？？
v:=(t shl 8)or(t shl 24); shl 是？？？
procedure TForm1.TrackBar1Change(Sender: TObject);
var
t,v:Longint;
begin
t:=TrackBar1.Position;
v:=(t shl 8)or(t shl 24);
waveOutSetVolume(0,v);
end;就是 waveOutSetVolume(0,v); 0 和v 是代表什么？？
v:=(t shl 8)or(t shl 24); shl 是？？？
量的大小，这是个32位的整数，高16位表示右声道的音量，低16位表示左声道
shl表示左移
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
MMSystem;(*
* TAudioMixer v1.11 (FREEWARE component)
* -----------------
* Released 4 Jan 1999
*
* This component can cache data from audio mixer. It has direct support for
* getting/setting volume of any control (It can set also set state of that
* "Selected" CheckBox in standard Windows Volume Control program). You can
* better use other features of mixer, but that's more difficult than volume
* setting and you must know something about audio mixer.
*
* The mixer has following structure (as it is in this component) :
*
* Destinations (destinations should be for example: Playback, Recording and Voice commands)
* |
* |--Destination[0] (if you want to get volume of this call GeVolume (<ThisDestinationNum>,-1,...))
* | | (=0) ----
* | |--Data:TMixerLine
* | |--Controls (controls of the line, ex: Master volume, master mute)
* | | |
* | | |--Control[0]
* | | |--Control[1]
* | | |--Control[..]
* | |
* | |--Connections (ex: Wave, MIDI, CD Audio, Line-In,...)
* | |
* | |--Connection[0] (GetVolume (<ThisDestinationNum>,<ThisConnectionNumb>,...))
* | | | (=0) (=0)
* | | |--Data:TMixerLine
* | | |--Controls (here can be volume and mute)
* | | |
* | | |--Control[0]
* | | |--Control[1]
* | | |--Control[..]
* | |
* | |--Connection[1]
* | |--Connection[..]
* |
* |--Destination[1]
* |--Destination[..]
*
*
* There are many types of controls - checkbox, list, slider,... they are
* described in Windows help. Common ones are volume slider, mute checkbox or
* volume meter.
*
* This component is universal, so you can work with all controls through it,
* but this is difficult. You can simply get/set volume level by procedures
* GetVolume or SetVolume (description is near their declaration; use - see
* example program).
*
*
* What's New
* ----------
* 1.11 (4 Jan 1999)
* - now it supports also MIXERCONTROL_CONTROLTYPE_MUX flag
* (I got SB Live! for Christmas (:-)) and my component didn't work
* properly, this corrects that problem)
* 1.1 (16 Nov 1998)
* - made compatible with Delphi 4
* - corrected memory leaks (by Ishida Wataru)
* - some another minor changes (by Ishida Wataru)
* - added another example
* - added AMixer.dcr
* 1.0 (18 Aug 1998)
* - initial version
*
*
* You can use this component freely in your programs. But if you do so, please
* send me an e-mail. I would like to know if it is useful.
*
* ?Vit Kovalcik
*
* e-mail: [email protected]
* WWW: http://www.geocities.com/SiliconValley/Hills/1335/
*){Note:
When no mixer is present TAudioMixer.Destinations will be nil.
If you then check Destinations.Count it will raise exception,
so be sure to check TAudioMixer.MixerCount first.}type
TAudioMixer=class; TPListFreeItemNotify=procedure (Pntr:Pointer) of object;
TMixerChange=procedure (Sender:TObject;MixerH:HMixer;ID:Integer) of object;
{MixerH is handle of mixer, which sent this message.
ID is ID of changed item (line or control).} TPointerList=class(TObject)
private
FOnFreeItem:TPListFreeItemNotify;
Items:Tlist;
protected
function GetPointer (Ind:Integer):Pointer;
function GetCount :integer;
public
constructor Create;
destructor Destroy; override;
procedure Clear;
procedure Add (Pntr:Pointer);
property Count:Integer read GetCount;
property Pointer[Ind:Integer]:Pointer read GetPointer; default;
property OnFreeItem:TPListFreeItemNotify read FOnFreeItem write FOnFreeItem; end; TMixerControls=class(TObject)
private
heap:pointer;
FControls:TPointerList;
protected
function GetControl (Ind:Integer):PMixerControl;
function GetCount:Integer;
public
constructor Create (AMixer:TAudioMixer;AData:TMixerLine);
destructor Destroy; override;
property Control[Ind:Integer]:PMixerControl read GetControl; default;
property Count:Integer read GetCount;
end; TMixerConnection=class(TObject)
private
XMixer:TAudioMixer;
FData:TMixerLine;
FControls:TMixerControls;
public
constructor Create (AMixer:TAudioMixer;AData:TMixerLine);
destructor Destroy; override;
property Controls:TMixerControls read FControls;
property Data:TMixerLine read FData;
end;---------
春困秋乏夏打盹，睡不醒的冬三月 ^^!
private
XMixer:TAudioMixer;
FConnections:TPointerList;
protected
procedure DoFreeItem (Pntr:Pointer);
function GetConnection (Ind:Integer):TMixerConnection;
function GetCount:Integer;
public
constructor Create (AMixer:TAudioMixer;AData:TMixerLine);
destructor Destroy; override;
property Connection[Ind:Integer]:TMixerConnection read GetConnection; default;
property Count:Integer read GetCount;
end; TMixerDestination=class(TObject)
private
XMixer:TAudioMixer;
FData:TMixerLine;
FControls:TMixerControls;
FConnections:TMixerConnections;
public
constructor Create (AMixer:TAudioMixer;AData:TMixerLine);
destructor Destroy; override;
property Connections:TMixerConnections read FConnections;
property Controls:TMixerControls read FControls;
property Data:TMixerLine read FData;
end; TMixerDestinations=class(TObject)
private
FDestinations:TPointerList;
protected
function GetDestination (Ind:Integer):TMixerDestination;
procedure DoFreeItem (Pntr:Pointer);
function GetCount:Integer;
public
constructor Create (AMixer:TAudioMixer);
destructor Destroy; override;
property Count:Integer read GetCount;
property Destination[Ind:Integer]:TMixerDestination read GetDestination; default;
end; TAudioMixer = class(TComponent)
private
XWndHandle:HWnd; FDestinations:TMixerDestinations;
FMixersCount:Integer;
FMixerHandle:HMixer;
FMixerID:Integer;
FMixerCaps:TMixerCaps;
FOnLineChange:TMixerChange;
FOnControlChange:TMixerChange;
protected
procedure SetMixerID (Value:Integer);
procedure MixerCallBack (var Msg:TMessage);
procedure CloseMixer;
published
constructor Create (AOwner:TComponent); override;
destructor Destroy; override;
property MixerID:Integer read FMixerID write SetMixerID;
{Opened mixer - value must be in range 0..MixersCount-1
If no mixer is opened this value is -1}
property OnLineChange:TMixerChange read FOnLineChange write FOnLineChange;
property OnControlChange:TMixerChange read FOnControlChange write FOnControlChange;
public
function GetVolume (ADestination,AConnection:Integer;var LeftVol,RightVol,Mute:Integer;var VolDisabled,MuteDisabled:Boolean):Boolean;
{This function return volume of selected Destination and Connection.
ADestination must be from range 0..Destinations.Count-1
AConnection must be in range 0..Destinations[ADestination].Connections.Count-1
If you want to read master volume of some Destination, you have to
set AConnection to -1.
If LeftVol, RightVol or Mute is not supported by queried connection,
it's return value will be -1. LeftVol and RightVol are in range 0..65536 If Mute is non-zero then the connection is silent.
If specified line is recording source then Mute specifies if programs will
record from this connection (it is copy of "Select" Checkbox in
standard Windows Volume Control program)
VolDisabled or MuteDisabled is True when you cannot apply settings to this
control (but can read it). Return value of the function is True if no error has occured,
otherwise it returns False.}
function SetVolume (ADestination,AConnection:Integer;LeftVol,RightVol,Mute:Integer):Boolean;
{This function sets volume.
If you set RightVol to -1 and connection is stereo then LeftVol will be
copied to RightVol.
If LeftVol or Mute is -1 then this value will not be set. Return value is True if ADestination and AConnection ar correct, otherwise False.}
property Destinations:TMixerDestinations read FDestinations;
{Ind must be in range 0..DestinationsCount-1}
property MixerCaps:TMixerCaps read FMixerCaps;
property MixerCount:Integer read FMixersCount;
{Number of mixers present in system; mostly 1}
property MixerHandle:HMixer read FMixerHandle;
{Handle of opened mixer}
end;procedure Register;implementation{------------}
{TPointerList}
{------------}constructor TPointerList.Create;
begin
items:=tlist.create;
end;destructor TPointerList.Destroy;
begin
Clear;
items.destroy;
end;procedure TPointerList.Add (Pntr:Pointer);
begin
items.add(Pntr);
end;function TPointerList.GetPointer (Ind:Integer):Pointer;
begin
result:=items[Ind];
end;procedure TPointerList.Clear;
var i:integer;
begin
for i:=0 to items.count-1 do begin
If Assigned (FOnFreeItem) then
FOnFreeItem (items[i])
end;
items.clear;
end;function TPointerList.GetCount:Integer;
begin
result:=items.count;
end;{--------------}
{TMixerControls}
{--------------}constructor TMixerControls.Create (AMixer:TAudioMixer;AData:TMixerLine);
var MLC:TMixerLineControls;
A,B:Integer;
P:PMixerControl;
begin
FControls:=TPointerList.Create;
MLC.cbStruct:=SizeOf(MLC);
MLC.dwLineID:=AData.dwLineID;
MLC.cControls:=AData.cControls;
MLC.cbmxctrl:=SizeOf(TMixerControl);
GetMem (P,SizeOf(TMixerControl)*AData.cControls);
heap:=P;
MLC.pamxctrl:=P;
A:=MixerGetLineControls(AMixer.MixerHandle,@MLC, MIXER_GETLINECONTROLSF_ALL);
If A=MMSYSERR_NOERROR then
begin
For B:=0 to AData.cControls-1 do
begin
FControls.Add (P);
Inc (P);
end;
end;
end;destructor TMixerControls.Destroy;
begin
FControls.free;
freemem(heap);
inherited;
end;function TMixerControls.GetControl (Ind:Integer):PMixerControl;
begin
Result:=FControls.Pointer[Ind];
end;function TMixerControls.GetCount:Integer;
begin
Result:=FControls.Count;
end;---------
春困秋乏夏打盹，睡不醒的冬三月 ^^!
{TMixerConnection}
{----------------}constructor TMixerConnection.Create (AMixer:TAudioMixer;AData:TMixerLine);
begin
FData:=AData;
XMixer:=AMixer;
FControls:=TMixerControls.Create (AMixer,AData);
end;destructor TMixerConnection.Destroy;
begin
FControls.Free;
inherited;
end;{-----------------}
{TMixerConnections}
{-----------------}constructor TMixerConnections.Create (AMixer:TAudioMixer;AData:TMixerLine);
var A,B:Integer;
ML:TMixerLine;
begin
XMixer:=AMixer;
FConnections:=TPointerList.Create;
FConnections.OnFreeItem:=Dofreeitem;
ML.cbStruct:=SizeOf(TMixerLine);
ML.dwDestination:=AData.dwDestination;
For A:=0 to AData.cConnections-1 do
begin
ML.dwSource:=A;
B:=MixerGetLineInfo (AMixer.MixerHandle,@ML,MIXER_GETLINEINFOF_SOURCE);
If B=MMSYSERR_NOERROR then
FConnections.Add(Pointer(TMixerConnection.Create (XMixer,ML)));
end;
end;destructor TMixerConnections.Destroy;
begin
FConnections.Free;
inherited;
end;procedure TMixerConnections.DoFreeItem (Pntr:Pointer);
begin
TMixerConnection(Pntr).Free;
end;function TMixerConnections.GetConnection (Ind:Integer):TMixerConnection;
begin
Result:=FConnections.Pointer[Ind];
end;function TMixerConnections.GetCount:Integer;
begin
Result:=FConnections.Count;
end;{-----------------}
{TMixerDestination}
{-----------------}constructor TMixerDestination.Create (AMixer:TAudioMixer;AData:TMixerLine);
begin
FData:=AData;
XMixer:=AMixer;
FConnections:=TMixerConnections.Create (XMixer,FData);
FControls:=TMixerControls.Create (XMixer,AData);
end;destructor TMixerDestination.Destroy;
begin
Fcontrols.free;
FConnections.Free;
inherited;
end;{------------------}
{TMixerDestinations}
{------------------}constructor TMixerDestinations.Create (AMixer:TAudioMixer);
var A,B:Integer;
ML:TMixerLine;
begin
FDestinations:=TPointerList.Create;
FDestinations.OnFreeItem:=DoFreeItem;
For A:=0 to AMixer.MixerCaps.cDestinations-1 do
begin
ML.cbStruct:=SizeOf(TMixerLine);
ML.dwDestination:=A;
B:=MixerGetLineInfo (AMixer.MixerHandle,@ML,MIXER_GETLINEINFOF_DESTINATION);
If B=MMSYSERR_NOERROR then
FDestinations.Add(Pointer(TMixerDestination.Create (AMixer,ML)));
end;
end;procedure TMixerDestinations.DoFreeItem (Pntr:Pointer);
begin
TMixerDestination(Pntr).Free;
end;destructor TMixerDestinations.Destroy;
begin
FDestinations.Free;
inherited;
end;function TMixerDestinations.GetDestination (Ind:Integer):TMixerDestination;
begin
Result:=FDestinations.Pointer[Ind];
end;function TMixerDestinations.GetCount:Integer;
begin
Result:=FDestinations.Count;
end;{-----------}
{TAudioMixer}
{-----------}constructor TAudioMixer.Create (AOwner:TComponent);
begin
inherited Create (AOwner);
FDestinations:=nil;
XWndHandle:=AllocateHWnd (MixerCallBack);
FMixersCount:=mixerGetNumDevs;
FMixerID:=-1;
If FMixersCount>0 then
SetMixerID (0);
end;destructor TAudioMixer.Destroy;
begin
closemixer;
if XWndHandle<>0 then
DeAllocateHwnd(XWndHandle);
inherited;
end;procedure TAudioMixer.CloseMixer;
begin
If FMixerID>=0 then
begin
mixerClose (FMixerHandle);
FMixerID:=-1;
end;
FDestinations.Free;
FDestinations:=nil;
end;procedure TAudioMixer.SetMixerID (Value:Integer);
begin
If Value>=FMixersCount then
Exit;
CloseMixer;
If Value>=0 then
If mixerOpen (@FMixerHandle,Value,XWndHandle,0,CALLBACK_WINDOW OR MIXER_OBJECTF_MIXER)=MMSYSERR_NOERROR then
begin
FMixerID:=Value;
mixerGetDevCaps (MixerID,@FMixerCaps,SizeOf (TMixerCaps));
FDestinations:=TMixerDestinations.Create (Self);
end;
end;procedure TAudioMixer.MixerCallBack (var Msg:TMessage);
begin
case Msg.Msg of
MM_MIXM_LINE_CHANGE:
If Assigned (OnLineChange) then
OnLineChange (Self,Msg.wParam,Msg.lParam);
MM_MIXM_CONTROL_CHANGE:
If Assigned (OnControlChange) then
OnControlChange (Self,Msg.wParam,Msg.lParam);
end;
end;谁在顶一下 还没有完呢---------
春困秋乏夏打盹，睡不醒的冬三月 ^^!
var MD:TMixerDestination;
MC:TMixerConnection;
Cntrls:TMixerControls;
MCD:TMixerControlDetails;
Cntrl:PMixerControl;
A,B:Integer;
ML:TMixerLine;
details:array [0..30] of Integer;
begin
Result:=False;
MD:=Destinations[ADestination];
If MD<>nil then
begin
If AConnection=-1 then
begin
Cntrls:=MD.Controls;
ML:=MD.Data;
end
else
begin
MC:=MD.Connections[AConnection];
If MC<>nil then
begin
Cntrls:=MC.Controls;
ML:=MC.Data;
end
else
Cntrls:=nil;
end;
If Cntrls<>nil then
begin
A:=0;
Result:=True;
LeftVol:=-1;
RightVol:=-1;
Mute:=-1;
while ((LeftVol=-1) OR (Mute=-1)) AND (A<Cntrls.Count) do
begin
Cntrl:=Cntrls[A];
If Cntrl<>nil then
begin
If ((Cntrl.dwControlType=MIXERCONTROL_CONTROLTYPE_VOLUME) OR
(Cntrl.dwControlType=MIXERCONTROL_CONTROLTYPE_MUTE)) AND
(Cntrl.fdwControl AND MIXERCONTROL_CONTROLF_MULTIPLE<>MIXERCONTROL_CONTROLF_MULTIPLE)
then
begin
MCD.cbStruct:=SizeOf(TMixerControlDetails);
MCD.dwControlID:=Cntrl.dwControlID;
If Cntrl.fdwControl AND MIXERCONTROL_CONTROLF_UNIFORM>0 then
MCD.cChannels:=1
else
MCD.cChannels:=ML.cChannels;
MCD.cMultipleItems:=0;
MCD.cbDetails:=SizeOf(Integer);
MCD.paDetails:=@details;
B:=mixerGetControlDetails (FMixerHandle,@MCD,MIXER_GETCONTROLDETAILSF_VALUE);
If B=MMSYSERR_NOERROR then
begin
If (Cntrl.dwControlType=MIXERCONTROL_CONTROLTYPE_VOLUME) AND (LeftVol=-1) then
begin
VolDisabled:=Cntrl.fdwControl AND MIXERCONTROL_CONTROLF_DISABLED>0;
If not VolDisabled then
begin
LeftVol:=details[0];
If MCD.cChannels>1 then
RightVol:=Details[1];
end;
end
else
If (Cntrl.dwControlType=MIXERCONTROL_CONTROLTYPE_MUTE) AND (Mute=-1) then
begin
MuteDisabled:=Cntrl.fdwControl AND MIXERCONTROL_CONTROLF_DISABLED>0;
If not MuteDisabled then
begin
If Details[0]<>0 then
Mute:=1
else
Mute:=0;
end;
end;
end;
end;
end;
Inc (A);
end;
If Mute=-1 then
begin
If AConnection<>-1 then
begin
Cntrls:=MD.Controls;
ML:=MD.Data;
If Cntrls<>nil then
begin
A:=0;
while (Mute=-1) AND (A<Cntrls.Count) do
begin
Cntrl:=Cntrls[A];
If (Cntrl.dwControlType AND MIXERCONTROL_CONTROLTYPE_MIXER=MIXERCONTROL_CONTROLTYPE_MIXER) OR
(Cntrl.dwControlType AND MIXERCONTROL_CONTROLTYPE_MUX=MIXERCONTROL_CONTROLTYPE_MUX) then
// Mux is similar to mixer, but only one line can be selected at a time
begin
MCD.cbStruct:=SizeOf(TMixerControlDetails);
MCD.dwControlID:=Cntrl.dwControlID;
If Cntrl.fdwControl AND MIXERCONTROL_CONTROLF_UNIFORM>0 then
MCD.cChannels:=1
else
MCD.cChannels:=ML.cChannels;
If Cntrl.fdwControl AND MIXERCONTROL_CONTROLF_MULTIPLE=MIXERCONTROL_CONTROLF_MULTIPLE then
MCD.cMultipleItems:=Cntrl.cMultipleItems
else
MCD.cMultipleItems:=0;
MCD.cbDetails:=4;
MCD.paDetails:=@Details;
B:=mixerGetControlDetails (FMixerHandle,@MCD,MIXER_GETCONTROLDETAILSF_VALUE);
If B=MMSYSERR_NOERROR then
Mute:=Details[AConnection];
end;
Inc (A);
end;
end;
end;
end;
If LeftVol=-1 then
VoldIsabled:=True;
If Mute=-1 then
MuteDisabled:=True;
end;
end;
end;
---------
春困秋乏夏打盹，睡不醒的冬三月 ^^!
function TAudioMixer.SetVolume (ADestination,AConnection:Integer;LeftVol,RightVol,Mute:Integer):Boolean;
var MD:TMixerDestination;
MC:TMixerConnection;
Cntrls:TMixerControls;
MCD:TMixerControlDetails;
Cntrl:PMixerControl;
A,B:Integer;
ML:TMixerLine;
details:array [0..30] of Integer;
VolSet,MuteSet:Boolean;
begin
Result:=False;
MD:=Destinations[ADestination];
If MD<>nil then
begin
If AConnection=-1 then
begin
Cntrls:=MD.Controls;
ML:=MD.Data;
end
else
begin
MC:=MD.Connections[AConnection];
If MC<>nil then
begin
Cntrls:=MC.Controls;
ML:=MC.Data;
end
else
Cntrls:=nil;
end;
If Cntrls<>nil then
begin
A:=0;
VolSet:=LeftVol=-1;
MuteSet:=Mute=-1;
Result:=True;
while (not VolSet OR not MuteSet) AND (A<Cntrls.Count) do
begin
Cntrl:=Cntrls[A];
If Cntrl<>nil then
begin
If ((Cntrl.dwControlType=MIXERCONTROL_CONTROLTYPE_VOLUME) OR
(Cntrl.dwControlType=MIXERCONTROL_CONTROLTYPE_MUTE)) AND
(Cntrl.fdwControl AND MIXERCONTROL_CONTROLF_MULTIPLE<>MIXERCONTROL_CONTROLF_MULTIPLE)
then
begin
MCD.cbStruct:=SizeOf(TMixerControlDetails);
MCD.dwControlID:=Cntrl.dwControlID;
If Cntrl.fdwControl AND MIXERCONTROL_CONTROLF_UNIFORM>0 then
MCD.cChannels:=1
else
MCD.cChannels:=ML.cChannels;
MCD.cMultipleItems:=0;
MCD.cbDetails:=SizeOf(Integer);
MCD.paDetails:=@Details;
If (Cntrl.dwControlType=MIXERCONTROL_CONTROLTYPE_VOLUME) AND not VolSet then
begin
Details[0]:=LeftVol;
If RightVol=-1 then
Details[1]:=LeftVol
else
Details[1]:=RightVol;
VolSet:=True;
end
else
If (Cntrl.dwControlType=MIXERCONTROL_CONTROLTYPE_MUTE) AND not MuteSet then
begin
Details[0]:=Mute;
MuteSet:=True;
end;
mixerSetControlDetails (FMixerHandle,@MCD,MIXER_GETCONTROLDETAILSF_VALUE);
end;
end;
Inc (A);
end;
If not MuteSet then
begin
If AConnection<>-1 then
begin
Cntrls:=MD.Controls;
ML:=MD.Data;
If Cntrls<>nil then
begin
A:=0;
while not MuteSet AND (A<Cntrls.Count) do
begin
Cntrl:=Cntrls[A];
If (Cntrl.dwControlType AND MIXERCONTROL_CONTROLTYPE_MIXER=MIXERCONTROL_CONTROLTYPE_MIXER) OR
(Cntrl.dwControlType AND MIXERCONTROL_CONTROLTYPE_MUX=MIXERCONTROL_CONTROLTYPE_MUX) then
begin
MCD.cbStruct:=SizeOf(TMixerControlDetails);
MCD.dwControlID:=Cntrl.dwControlID;
If Cntrl.fdwControl AND MIXERCONTROL_CONTROLF_UNIFORM>0 then
MCD.cChannels:=1
else
MCD.cChannels:=ML.cChannels;
If Cntrl.fdwControl AND MIXERCONTROL_CONTROLF_MULTIPLE=MIXERCONTROL_CONTROLF_MULTIPLE then
MCD.cMultipleItems:=Cntrl.cMultipleItems
else
MCD.cMultipleItems:=0;
MCD.cbDetails:=4;
MCD.paDetails:=@Details;
MuteSet:=True;
mixerGetControlDetails (FMixerHandle,@MCD,MIXER_GETCONTROLDETAILSF_VALUE);
For B:=0 to Cntrl.cMultipleItems-1 do
Details[B]:=0;
Details[AConnection]:=Mute;
mixerSetControlDetails (FMixerHandle,@MCD,MIXER_GETCONTROLDETAILSF_VALUE);
end;
Inc (A);
end;
end;
end;
end;
end;
end;
end;procedure Register;
begin
RegisterComponents('Samples', [TAudioMixer]);
end;end.
把上面的保存为 AMixer.pas然后你就用吧 hehe^^ 这可是控制 Windows 系统级音量哦---------
春困秋乏夏打盹，睡不醒的冬三月 ^^!
困扰了我许久。