Quartz usage of Various Drawing Images-Implementation of image painting, text writing, line drawing, elliptical, rectangular, prism, etc.

// Only override drawrect: If you perform custom drawing.
// An empty implementation adversely affects performance during animation.
-(Void) drawrect :( cgrect) rect
{
Cgcontextref context = uigraphicsgetcurrentcontext ();

/* Draw a line at No.1
Cgcontextsetrgbstrokecolor (context, 0.5, 0.5, 0.5, 0.5); // line color
Cgcontextmovetopoint (context, 20, 20 );
Cgcontextaddlinetopoint (context, 20 );
Cgcontextstrokepath (context );
*/
 
/* No. 2 write text
Cgcontextsetlinewidth (context, 1.0 );
Cgcontextsetrgbfillcolor (context, 0.5, 0.5, 0.5, 0.5 );
Uifont * font = [uifont boldsystemfontofsize: 18.0];
[@ "Company: Beijing zhongsoft Technology Co., Ltd. \ n Department: ERP division \ n name: mcliang" drawinrect: cgrectmake (20, 40,280,300) withfont: font];
*/
 
/* No. 3 draw a square image without Borders
Cgcontextsetrgbfillcolor (context, 0, 0.25, 0, 0.5 );
Cgcontextfillrect (context, cgrectmake (2, 2,270,270 ));
Cgcontextstrokepath (context );
*/

/* Draw a square border in No. 4
Cgcontextsetrgbstrokecolor (context, 0.5, 0.5, 0.5, 0.5); // line color
Cgcontextsetlinewidth (context, 2.0 );
Cgcontextaddrect (context, cgrectmake (2, 2,270,270 ));
Cgcontextstrokepath (context );
*/
 
/* No. 5 draw a square background color
Cgcontexttranslatectm (context, 0.0f, self. bounds. Size. Height );
Cgcontextscalectm (context, 1.0f,-1.0f );
Uigraphicspushcontext (context );
Cgcontextsetlinewidth (context, 320 );
Cgcontextsetrgbstrokecolor (context, 250.0/255,250.0/255,210.0/255, 1.0 );
Cgcontextstrokerect (context, cgrecctmake (0, 0,320,460 ));
Uigraphicspopcontext ();
*/
 
/* No. 6 elliptic
Cgrect arect = cgrectmake (80, 80,160,100 );
Cgcontextsetrgbstrokecolor (context, 0.6, 0.9, 0, 1.0 );
Cgcontextsetlinewidth (context, 3.0 );
Cgcontextaddellipseinrect (context, arect); // elliptic
Cgcontextdrawpath (context, kcgpathstroke );
*/
 
/* No. 7
Cgcontextbeginpath (context );
Cgcontextsetrgbstrokecolor (context, 0, 0, 1, 1 );
Cgcontextmovetopoint (context, 100,100 );
Cgcontextaddarctopoint (context, 50,100, 50,150, 50 );
Cgcontextstrokepath (context );
*/
 
/* No. 8 gradient
Cgcontextclip (context );
Cgcolorspaceref RGB = cgcolorspacecreatedevicergb ();
Cgfloat colors [] =
{
204.0/255.0, 224.0/255.0, 244.0/255.0, 1.00,
29.0/255.0, 156.0/255.0, 215.0/255.0, 1.00,
0.0/255.0, 50.0/255.0, 126.0/255.0, 1.00,
};
Cggradientref gradient = cggradientcreatewithcolorcomponents
(RGB, colors, null, sizeof (colors)/(sizeof (colors [0]) * 4 ));
Cgcolorspacerelease (RGB );
Cgcontextdrawlineargradient (context, gradient, cgpointmake
(0.0, 0.0), cgpointmake (0.0, self. Frame. Size. Height ),
Kcggradientdrawsbeforestartlocation );
*/

/* Draw a square with four lines
// Draw a line
Uicolor * acolor = [uicolor colorwithred: 0 Green: 1.0 Blue: 0 ALPHA: 0];
Cgcontextsetrgbstrokecolor (context, 1.0, 0, 0, 1.0 );
Cgcontextsetfillcolorwithcolor (context, acolor. cgcolor );
Cgcontextsetlinewidth (context, 4.0 );
Cgpoint apoints [5];
Apoints [0] = cgpointmake (60, 60 );
Apoints [1] = cgpointmake (260, 60 );
Apoints [2] = cgpointmake (260,300 );
Apoints [3] = cgpointmake (60,300 );
Apoints [4] = cgpointmake (60, 60 );
Cgcontextaddlines (context, apoints, 5 );
Cgcontextdrawpath (context, kcgpathstroke); // start to draw a line
*/

/* No. 10
Uicolor * acolor = [uicolor colorwithred: 0 Green: 1.0 Blue: 0 ALPHA: 0];
Cgcontextsetrgbstrokecolor (context, 1.0, 0, 0, 1.0 );
Cgcontextsetfillcolorwithcolor (context, acolor. cgcolor );
// Elliptic
Cgrect arect = cgrectmake (80, 80,160,100 );
Cgcontextsetrgbstrokecolor (context, 0.6, 0.9, 0, 1.0 );
Cgcontextsetlinewidth (context, 3.0 );
Cgcontextsetfillcolorwithcolor (context, acolor. cgcolor );
Cgcontextaddrect (context, rect); // rectangle
Cgcontextaddellipseinrect (context, arect); // elliptic
Cgcontextdrawpath (context, kcgpathstroke );
*/

/* No. 11
Draw a solid circle
Cgcontextfillellipseinrect (context, cgrectmake (95, 95,100.0, 100 ));
*/

/* No. 12
Draw a diamond
Cgcontextsetlinewidth (context, 2.0 );
Cgcontextsetstrokecolorwithcolor (context, [uicolor bluecolor]. cgcolor );
Cgcontextmovetopoint (context, 100,100 );
Cgcontextaddlinetopoint (context, 150,150 );
Cgcontextaddlinetopoint (context, 100,200 );
Cgcontextaddlinetopoint (context, 50,150 );
Cgcontextaddlinetopoint (context, 100,100 );
Cgcontextstrokepath (context );
*/
 
/* Draw a rectangle at No. 13
Cgcontextsetlinewidth (context, 2.0 );
Cgcontextsetstrokecolorwithcolor (context, [uicolor bluecolor]. cgcolor );
Cgrect rectangle = cgrectmake (60,170,200, 80 );
Cgcontextaddrect (context, rectangle );
Cgcontextstrokepath (context );
*/

/* Elliptic
Cgcontextsetlinewidth (context, 2.0 );
Cgcontextsetstrokecolorwithcolor (context, [uicolor bluecolor]. cgcolor );
Cgrect rectangle = cgrectmake (60,170,200, 80 );
Cgcontextaddellipseinrect (context, rectangle );
Cgcontextstrokepath (context );
*/

/* Fill a path in Red:
Cgcontextmovetopoint (context, 100,100 );
Cgcontextaddlinetopoint (context, 150,150 );
Cgcontextaddlinetopoint (context, 100,200 );
Cgcontextaddlinetopoint (context, 50,150 );
Cgcontextaddlinetopoint (context, 100,100 );
Cgcontextsetfillcolorwithcolor (context, [uicolor redcolor]. cgcolor );
Cgcontextfillpath (context );
*/

/* Fill in a red rectangle with a blue edge
Cgcontextsetlinewidth (context, 2.0 );
Cgcontextsetstrokecolorwithcolor (context, [uicolor bluecolor]. cgcolor );
Cgrect rectangle = cgrectmake (60,170,200, 80 );
Cgcontextaddrect (context, rectangle );
Cgcontextstrokepath (context );
Cgcontextsetfillcolorwithcolor (context, [uicolor redcolor]. cgcolor );
Cgcontextfillrect (context, rectangle );
*/

/* Draw an arc
// The arc is drawn by specifying two cut points and angles and calling cgcontextaddarctopoint ().
Cgcontextsetlinewidth (context, 2.0 );
Cgcontextsetstrokecolorwithcolor (context, [uicolor bluecolor]. cgcolor );
Cgcontextmovetopoint (context, 100,100 );
Cgcontextaddarctopoint (context, 100,200,300,200,100 );
Cgcontextstrokepath (context );
*/

/*
Plot the Beitz Curve
// The Beitz curve is drawn by moving a starting point and then using two control points and a stop point that calls the cgcontextaddcurvetopoint () function.
Cgcontextsetlinewidth (context, 2.0 );
Cgcontextsetstrokecolorwithcolor (context, [uicolor bluecolor]. cgcolor );
Cgcontextmovetopoint (context, 10, 10 );
Cgcontextaddcurvetopoint (context, 0, 50,300,250,300,400 );

Cgcontextstrokepath (context );
*/

/* Draw a quadratic Beitz Curve
Cgcontextsetlinewidth (context, 2.0 );
Cgcontextsetstrokecolorwithcolor (context, [uicolor bluecolor]. cgcolor );
Cgcontextmovetopoint (context, 10,200 );
Cgcontextaddquadcurvetopoint (context, 150, 10,300,200 );
Cgcontextstrokepath (context );
*/

/* Draw the dotted line
Cgcontextsetlinewidth (context, 5.0 );
Cgcontextsetstrokecolorwithcolor (context, [uicolor bluecolor]. cgcolor );
Cgfloat dasharray [] = {2, 6, 4 };
Cgcontextsetlinedash (context, 3, dasharray, 4); // skip 3 and draw the dotted line, so there are 6-(3-2) = 5 virtual points at the beginning
Cgcontextmovetopoint (context, 10,200 );
Cgcontextaddquadcurvetopoint (context, 150, 10,300,200 );
Cgcontextstrokepath (context );
*/


/* Draw an image
Nsstring * ImagePath = [[nsbundle mainbundle] pathforresource: @ "dog" oftype: @ "PNG"];
Uiimage * myimageobj = [[uiimage alloc] initwithcontentsoffile: ImagePath];
// [Myimageobj drawatpoint: cgpointmake (0, 0)];
[Myimageobj drawinrect: cgrectmake (0, 0,320,480)];
Nsstring * s = @ "my puppies ";
[S drawatpoint: cgpointmake (100, 0) withfont: [uifont systemfontofsize: 34.0];
*/

/*
Nsstring * Path = [[nsbundle mainbundle] pathforresource: @ "dog" oftype: @ "PNG"];
Uiimage * IMG = [uiimage imagewithcontentsoffile: path];
Cgimageref image = IMG. cgimage;
Cgcontextsavegstate (context );
Cgrect touchrect = cgrectmake (0, 0, IMG. Size. Width, IMG. Size. Height );
Cgcontextdrawimage (context, touchrect, image );
Cgcontextrestoregstate (context );
*/

/* Nsstring * Path = [[nsbundle mainbundle] pathforresource: @ "dog" oftype: @ "PNG"];
Uiimage * IMG = [uiimage imagewithcontentsoffile: path];
Cgimageref image = IMG. cgimage;
Cgcontextsavegstate (context );
 
Cgcontextrotatectm (context, m_pi );
Cgcontexttranslatectm (context,-IMG. Size. Width,-IMG. Size. Height );
 
Cgrect touchrect = cgrectmake (0, 0, IMG. Size. Width, IMG. Size. Height );
Cgcontextdrawimage (context, touchrect, image );
Cgcontextrestoregstate (context );*/
 
/*
Nsstring * Path = [[nsbundle mainbundle] pathforresource: @ "dog" oftype: @ "PNG"];
Uiimage * IMG = [uiimage imagewithcontentsoffile: path];
Cgimageref image = IMG. cgimage;

Cgcontextsavegstate (context );
 
Cgaffinetransform myaffine = cgaffinetransformmakerotation (m_pi );
Myaffine = cgaffinetransformtranslate (myaffine,-IMG. Size. Width,-IMG. Size. Height );
Cgcontextconcatctm (context, myaffine );
 
Cgcontextrotatectm (context, m_pi );
Cgcontexttranslatectm (context,-IMG. Size. Width,-IMG. Size. Height );
 
Cgrect touchrect = cgrectmake (0, 0, IMG. Size. Width, IMG. Size. Height );
Cgcontextdrawimage (context, touchrect, image );
Cgcontextrestoregstate (context );
*/
}