delphi之完美Splash方案

1.创建一个窗体(TfrmSplash)，放入一个TImageBox,加载一幅图片，调整好TImageBox与图片的大小，然后在其上放入一个TLabel,name=LblStatus,用于显示加载进度文字。然后将TfrmSplash设置为不自动创建。

 

2.加入如下代码（代码很简单，就不用解释太多）

unit UntFormSplash;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, StdCtrls;

type
  TfrmSplash = class(TForm)
    Image1: TImage;
    LblStatus: TLabel;
  private
    { Private declarations }
    FParam:Pointer;
  public
    { Public declarations }
    class function Execute(AParam:Pointer):Boolean;
    procedure SetStatusText(Value: string);
  published
    property StatusText : string write SetStatusText;
  end;

var
  SplashForm: TfrmSplash;

implementation

{$R *.dfm}

{ TfrmSplash }

class function TfrmSplash.Execute(AParam:Pointer): Boolean;
begin
  with TfrmSplash.Create(nil) do
  try
    FParam := AParam;
    Result := ShowModal = mrOk;
  finally
    Free;
  end;
end;

procedure TfrmSplash.SetStatusText(Value: string);
begin
  LblStatus.Caption := Value;
  Update;  //这句非常重要，不加的话，界面会阻塞，文字也就不会更新显示
  Sleep(1000); //这句根据自己实际情况来调整，主要是怕闪屏太快关闭，达不到效果
end;


end.

unit UntFormSplash;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, StdCtrls;

type
  TfrmSplash = class(TForm)
    Image1: TImage;
    LblStatus: TLabel;
  private
    { Private declarations }
    FParam:Pointer;
  public
    { Public declarations }
    class function Execute(AParam:Pointer):Boolean;
    procedure SetStatusText(Value: string);
  published
    property StatusText : string write SetStatusText;
  end;

var
  SplashForm: TfrmSplash;

implementation

{$R *.dfm}

{ TfrmSplash }

class function TfrmSplash.Execute(AParam:Pointer): Boolean;
begin
  with TfrmSplash.Create(nil) do
  try
    FParam := AParam;
    Result := ShowModal = mrOk;
  finally
    Free;
  end;
end;

procedure TfrmSplash.SetStatusText(Value: string);
begin
  LblStatus.Caption := Value;
  Update;  //这句非常重要，不加的话，界面会阻塞，文字也就不会更新显示
  Sleep(1000); //这句根据自己实际情况来调整，主要是怕闪屏太快关闭，达不到效果
end;


end.

 

3. 在项目的.dpr文件中加入如下代码：

begin

  Application.Initialize;

  Application.MainFormOnTaskbar := True; //这句如果有，必须放在SplashForm 创建之前，否则会在状态栏出现2个应用图标。或者干脆不要这一句。

  SplashForm := TfrmSplash.Create(Application);
  SplashForm.Show;
  SplashForm.Update;

  SplashForm.StatusText := '准备启动...';
  SplashForm.Update;

  Application.CreateForm(TDM, DM);
  Application.CreateForm(TfrmMain, frmMain);

  SplashForm.Hide;
  SplashForm.Free;

  Application.Run;
end.

begin

  Application.Initialize;

  SplashForm := TfrmSplash.Create(Application);
  SplashForm.Show;
  SplashForm.Update;

  SplashForm.StatusText := '准备启动...';
  SplashForm.Update;
  
  Application.CreateForm(TDM, DM);
  Application.CreateForm(TfrmMain, frmMain);
  
  SplashForm.Hide;
  SplashForm.Free;

  Application.Run;
end.

 

4.这一步就是主窗体加载数据的时候，边加载边更新闪屏的进度文字了：

procedure TfrmMain.FormCreate(Sender: TObject);
begin

  with SplashForm do
  try
    StatusText := ('开始初始化内存...');
    FCacheHash := TStringHashMap.Create(CaseInsensitiveTraits, 255);
    FCurrentClients := TList.Create;
    //VST.NodeDataSize := SizeOf(TTagCustomListItem);
    //VST.RootNodeCount := 2;
    VST.NodeDataSize := SizeOf(TMyTreeNodeDate);
    StatusText :=('初始化内存完成');

    StatusText :=('开始加载客户端列表...');
    BuildGroupTree;
    StatusText :=('加载客户端列表完成');

    StatusText :=('开始加载分组信息...');
    AddELVDefaultGroup;
    StatusText :=('开始初始化内存');

    StatusText :=('开始初始化数据...');
    G_DefNetImpl := TDefNetImpl.Create();
    G_DefNetImpl.RegisterObserver(Self);
    StatusText :=('全部数据加载完毕，程序即将启动...');

  finally

  end;


end;