IOS Cgcontextref Drawing Common

Cgcontextref context = Uigraphicsgetcurrentcontext (); Setting the context

Draw a line

Cgcontextsetstrokecolorwithcolor (context, [Uicolor Redcolor]. Cgcolor);//Line Color

Cgcontextsetlinewidth (context, 5.0);//Line width

Cgcontextmovetopoint (Context, 20, 20); Start drawing line, X, y as the start point coordinates

Cgcontextaddlinetopoint (context, 300, 20);//Draw a straight line, X, y is the coordinate of the line end point

Cgcontextstrokepath (context); Start drawing lines

Draw a Bézier curve

The Bezier curve is drawn by moving a starting point, then through two control points, and a stop point, called the Cgcontextaddcurvetopoint () function.

Cgcontextsetlinewidth (context, 2.0);

Cgcontextsetstrokecolorwithcolor (context, [Uicolor Bluecolor]. Cgcolor);

Cgcontextmovetopoint (context, 10, 10);

Cgcontextaddcurvetopoint (context, 200, 50, 100, 400, 300, 400);

Cgcontextstrokepath (context);

Draw a continuous curve

Cgcontextsetlinewidth (context, 5.0);

Cgcontextsetstrokecolorwithcolor (context, [Uicolor Greencolor]. Cgcolor);

Cgcontextmovetopoint (context, 230, 150);//Start drawing lines, X, y is the coordinates of the start point

Cgcontextaddcurvetopoint (context, 310, 100, 300, 200, 220, 220);//Draw Three point curve

Cgcontextaddcurvetopoint (context, 290, 140, 280, 180, 240, 190);//Draw Three point curve

Cgcontextstrokepath (context);//Start drawing lines

Draw dashed lines

Cgcontextsetrgbstrokecolor (context, 0.1, 0.2, 0.3, 1);//Line Color

Float dasharray1[] = {3, 2};

Cgcontextsetlinedash (context, 0, dashArray1, 2);//dashed line, can refer to http://blog.csdn.net/zhangao0086/article/details/7234859

Cgcontextmovetopoint (Context, 5, 70);//Start drawing lines, X, y is the coordinates of the start point

Cgcontextaddlinetopoint (context, 310, 70);//Draw a straight line, X, y is the coordinate of the line end point

Cgcontextstrokepath (context);//Start drawing lines

Plot a virtual curve

Cgcontextsetrgbstrokecolor (context, 0.3, 0.2, 0.1, 1);//Line Color

Float dasharray2[] = {3, 2, 10};

Cgcontextsetlinedash (context, 0, dashArray2, 3);//Draw dashed lines

Cgcontextmovetopoint (Context, 5, 90);//Start drawing lines, X, y is the coordinates of the start point

Cgcontextaddcurvetopoint (context, 200, 50, 100, 400, 300, 400);

Cgcontextstrokepath (context);//Start drawing lines

Draw a continuous curve

Cgcontextsetlinewidth (context, 5.0);

Float dasharray3[] = {3, 2, 10, 20, 5};

Cgcontextsetlinedash (context, 0, dashArray3, 5);//Draw dashed lines

Cgcontextsetstrokecolorwithcolor (context, [Uicolor Greencolor]. Cgcolor);

Cgcontextmovetopoint (Context, 5, 400);//Start drawing lines, X, y is the coordinates of the start point

Cgcontextaddcurvetopoint (Context, 50, 200, 80, 300, 100, 220);//Draw Three point curve

Cgcontextaddquadcurvetopoint (context, 150, 100, 200, 200);//Draw Two point curve

Cgcontextaddcurvetopoint (context, 240, 400, 10, 50, 300, 300);//Draw Three point curve

Cgcontextstrokepath (context);//Start drawing lines

Draw a square shape without a border

Cgcontextsetrgbfillcolor (context, 0, 0.25, 0, 0.5); Fill Color of box

Cgcontextfillrect (Context, CGRectMake (5, 150, 100, 100)); Draw a Box

Draw an arc

Cgcontextsetrgbstrokecolor (context, 0.3, 0.4, 0.5, 1);//Line Color

Cgcontextaddarc (context, 0, 180* (m_pi/180), 0);

Cgcontextstrokepath (context);//Start drawing lines

Draw a square border

Cgcontextref CONTEXT5 = Uigraphicsgetcurrentcontext (); Setting the context

Cgcontextsetlinewidth (CONTEXT5, 3.0);

Cgcontextsetrgbstrokecolor (CONTEXT5, 0.8, 0.1, 0.8, 1);

Cgcontextstrokerect (CONTEXT5, CGRectMake (5, 5, 300, 400));//Draw a square border, parameter 2: square coordinates.

Draw an Ellipse

CGRect arect= CGRectMake (80, 80, 160, 100);

Cgcontextsetrgbstrokecolor (context, 0.6, 0.9, 0, 1.0);

Cgcontextsetlinewidth (context, 3.0);

Cgcontextaddellipseinrect (context, arect); Ellipse, Parameter 2: the coordinates of the ellipse.

Cgcontextdrawpath (context, kcgpathstroke);

Draw a solid circle

Cgcontextfillellipseinrect (Context, CGRectMake (95, 195, 200.0, 100));//Draw a solid circle, parameter 2: round coordinates. Can be an ellipse

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);

Fills a path:

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);

IOS Cgcontextref Drawing Common