[Xcode] Fixed: Build error that it import Objective-C codes in the .cpp?

Build error: (NSObjCRuntime.h & NSObject)

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:371:1: Expected unqualified-id

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:373:19: Unknown type name 'NSString'
...

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/objc/NSObject.h:11:1: Expected unqualified-id
...


[Solution]
rename extension name from .cpp into .mm

[Xcode] Fixed: _CMAudioFormatDescriptionGetStreamBasicDescription", referenced from: -[captureNSObject init] in captureNSObject.o

I have a project to build some code,  and then it has error in the follow:

Undefined symbols for architecture x86_64:

  "_CMAudioFormatDescriptionGetStreamBasicDescription", referenced from:

      -[captureNSObject init] in captureNSObject.o

  "_CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer", referenced from:

      -[captureNSObject captureOutput:didOutputSampleBuffer:fromConnection:] in captureNSObject.o

  "_CMSampleBufferGetNumSamples", referenced from:

      -[captureNSObject captureOutput:didOutputSampleBuffer:fromConnection:] in captureNSObject.o

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

[Solution]

Add CoreMedia.framework into "Linked Frameworks and Libraries".

[Xcode] Enable/disable a button

@property (retain, nonatomic) IBOutlet UIButton *btnButton;

enable/disable like this in .m file:

btnButton.enabled = NO; // disable button
btnButton.enabled = YES; // enable button

[Xcode] How to convert int to NSString

    int nNum = 100;

    NSString* str = [[NSString alloc]initWithFormat:@"%d", nNum];

[Xcode] How to quit the application when the window closes

If you want an application to quit (terminate) when the window is closed, you can do this:

-(BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication*)theApplication
{
    return YES;
}

[Xcode] How to convert between NSTextField and NSString

// NSString --> NSTextField

NSTextField * txtField = [[NSTextField alloc] init];

NSString *str = @“1234”;

txtField.stringValue = str;

// NSTextField --> NSString

NSString *str1 = txtField.stringValue;

[Xcode] How to convert byte array to NSString

Byte* btData = new Byte[12];

memset(btData, 0, sizeof(Byte) * 12);

...

NSData *data = [NSData dataWithBytes:btData length:sizeof(btData)];

NSString *string = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];

[Xcode] Hotkey

command + X
- cut

command + C

- copy

command  + V
- paste

command + A
- select all

command + /
- add/remove comment

command + \

- add/remove breakpoint

command + R
- run

command + B
- build

command + F
- find

shift + command + F
- find in project

command + option + F
- find and replace

shift + command + option + F
- find and replace in project

[Mac OS] How To Capture a Screen Shot with Mac OS X

1. Command+Shift+3
   To capture the entire desktop, and then will be automatically saved as a PNG file on your desktop.

2. Command+Control+Shift+3
   To copy the entire desktop, and then will be placed on your clipboard for you to paste into another program.

3. Command+Shift+4
    To capture a portion of the desktop. A cross-hair cursor will appear and you can click and drag to select the area you wish to capture. When you release the mouse button, the screen shot will be automatically saved as a PNG file on your desktop. (The file is saved as PDF in Mac OS 10.3 and earlier.)

4. Command+Shift+4, then press the Spacebar
   To capture a specific application window. The cursor will change to a camera, and you can move it around the screen. As you move the cursor over an application window, the window will be highlighted. The entire window does not need to be visible for you to capture it. When you have the cursor over a window you want to capture, just click the mouse button and the screen shot will be saved as a PNG file on your desktop. (The file is saved as PDF in Mac OS 10.3 and earlier.)

[Windows] How to lock your computer using command line

Step 1:
Open a DOS promot for launching a special command line. One simple way you can do it would be by clicking Start/Run, typing cmd.

Step 2:
Enter  the command line for locking your station:
rundll32.exe user32.dll, LockWorkStation

[Win32] How to get the app owner version?

Example:

    CString strResult;
    TCHAR szModPath[MAX_PATH];
    ZeroMemory(szModPath, sizeof(TCHAR) * MAX_PATH);
    GetModuleFileName(NULL, szModPath, sizeof(szModPath));
    DWORD dwHandle;

    DWORD dwSize = GetFileVersionInfoSize(szModPath, &dwHandle);
    if (dwSize > 0)
    {
        BYTE* pbBuf = static_cast<BYTE*>(alloca(dwSize));
        if (GetFileVersionInfo(szModPath, dwHandle, dwSize, pbBuf))
        {
            UINT uiSize;
            BYTE* lpb;
            if (VerQueryValue(pbBuf, L"\\VarFileInfo\\Translation", (void**)&lpb, &uiSize))
            {
                WORD* lpw = (WORD*)lpb;
                CString strQuery;
                strQuery.Format(L"\\StringFileInfo\\%04x%04x\\ProductVersion", lpw[0], lpw[1]);
                if (VerQueryValue(pbBuf, const_cast<LPTSTR>((LPCTSTR)strQuery), (void**)&lpb, &uiSize ) && uiSize > 0)
                {
                    strResult = (LPCTSTR)lpb;
                }
            }
        }
    }

[Win32] How to get the OS Version?

DWORD WINAPI GetVersion(void);

Examples:

#include <windows.h>

#include <stdio.h>

void main()

{

    DWORD dwVersion = 0; 

    DWORD dwMajorVersion = 0;

    DWORD dwMinorVersion = 0; 

    DWORD dwBuild = 0;

    dwVersion = GetVersion();

    // Get the Windows version.

    dwMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));

    dwMinorVersion = (DWORD)(HIBYTE(LOWORD(dwVersion)));

    // Get the build number.

    if (dwVersion < 0x80000000)              

        dwBuild = (DWORD)(HIWORD(dwVersion));

    printf("Version is %d.%d (%d)\n", 

                dwMajorVersion,

                dwMinorVersion,

                dwBuild);

}

Reference:http://msdn.microsoft.com/en-us/library/windows/desktop/ms724439(v=vs.85).aspx

[Java, Windows 8] How to transform Java List to Store apps C++/CX?

Java codes:

private static List<String> vv = new ArrayList<String>();

vv.add("area");
vv.add("base");
vv.add("basefont");
vv.add("br");
vv.add("col");
vv.add("frame");
vv.add("hr");
vv.add("img");
vv.add("input");
vv.add("isindex");
vv.add("link");
vv.add("meta");
vv.add("param");

String ss = "hr";
if (vv.contains(ss))
{
/* vv contains ss */
}
else
{
/* vv does not contain xx */
}

==> Store apps C++/CX

Platform::Collections::Vector<Platform::String^>^ vv = ref new Vector<Platform::String^>();

vv->Append("area");

vv->Append("base");

vv->Append("basefont");

vv->Append("br");

vv->Append("col");

vv->Append("frame");

vv->Append("hr");

vv->Append("img");

vv->Append("input");

vv->Append("isindex");

vv->Append("link");

vv->Append("meta");

vv->Append("param");

unsigned int index = 0;

String^ ss = "hr";

if (vv->IndexOf(ss, &index))

{

/* vv contains ss */

} 

else

{

/* vv does not contain xx */

}

[Windows 8] Fixed: error LNK2001: unresolved external symbol _CLSID_FreeThreadedXMLHTTP60

Add msxml6.lib into Project\Properties\Configuration\Properties\Linker\Input\Additional Dependencies

[Windows 8] Fixed: error LNK2019: unresolved external symbol _CreateStreamOverRandomAccessStream@12 ...

Add shcore.lib into Project\Properties\Configuration\Properties\Linker\Input\Additional Dependencies

[Windows 8] Fixed: error C2061: syntax error : identifier 'task'

1. #include <ppltasks.h>

2. using namespace Concurrency;

[Windows 8] How to show ... when string is long in textBlock.

Add TextTrimming="WordEllipsis" in XAML

[Windows 8] How to covert Platform::String to char and fix C2440 Error with C++

Covert Platform::String to char
        Platform::String ^SrcString = "abc";
        std::wstring tmpW(SrcString ->Begin());
std::string tmpA(tmpW.begin(), tmpW.end());
char* DstString = tmpA.c_str();     // Error C2240

fix C2440 Error

        Platform::String ^SrcString = "abc";

        std::wstring tmpW(SrcString ->Begin());
std::string tmpA(tmpW.begin(), tmpW.end());
const char* DstString = tmpA.c_str();

[VC++] 如何在Edit control移動編輯位置至最後一行加入文字

TCHAR tmp[MAX_PATH];
ZeroMemory(tmp, sizeof(TCHAR) * MAX_PATH);
wsprintf(tmp, L"[Count]: %d\r\n", nCount);
m_oResult.SetSel(0, -1);
m_oResult.SetSel(-1);
m_oResult.ReplaceSel(tmp);

[Win32] 如何列印 %f 的資訊

先用ANSI code function, 再轉成Unicode, 如下:

char tmp[MAX_PATH];
ZeroMemory(tmp, sizeof(char) * MAX_PATH);
sprintf_s(tmp, "[Time Elapsed]: %f sec\n", dwTimeElapsed / 1000.0);
TCHAR tmp1[MAX_PATH];
ZeroMemory(tmp1, sizeof(TCHAR) * MAX_PATH);
wsprintf(tmp1, L"%S", tmp);
OutputDebugString(tmp1);

[Android Studio] 如何增加編輯器顯示行數和類別成員的區分

1. Open Settings Dialog in File\Settings...
2. Select IDE Settings\Editor\Appearance
3. Choose "Show line numbers" and "Show member separators"

[Android Studio] How to change the edit font in Android Studio

1. Open Settings Dialog in File\Settings...
2. Select IDE Settings\Editor\Colors & Fonts\Font
3. Press Save As...
4. Input name in popup dialog and Save
5. Remove Selected fonts and select new Available fonts
6. Press OK.