Draw graphics-Move, rotate, shadow, gradient

Only override Drawrect:if perform custom drawing.

An empty implementation adversely affects performance during animation.

-(void) DrawRect: (cgrect) Rect {

uibezierpath *path = [uibezierpathbezierpath];

// start coordinates of the drawing

[path movetopoint:cgpointmake(+)];

// connect each coordinate in turn

[path addlinetopoint:cgpointmake(+)];

[path addlinetopoint:cgpointmake(+)];

[path addlinetopoint:cgpointmake(+)];

// closed

[PathClosepath];

// context

cgcontextref context =uigraphicsgetcurrentcontext();

// Save context State

cgcontextsavegstate(context);

// Draw outline of a graphic

[Pathstroke];

// move origin so that each coordinate moves in turn

CGCONTEXTTRANSLATECTM(context, ();

// Set color

uicolor *fillcolor = [uicolorgreencolor];

// Fill Color

[FillColorSetfill];

// Fill

[Pathfill];

// move Origin coordinates again

CGCONTEXTTRANSLATECTM(context, ();

// graphics rotation

CGCONTEXTROTATECTM(context,3.14/4);

FillColor = [uicolororangecolor];

[Pathfill];

//[path Stroke];

// Restore Context State ,

cgcontextrestoregstate(context);

cgcontextsavegstate(context);

CGCONTEXTTRANSLATECTM(context, ();

// graphics Shadows

Cgcontextsetshadow(context,cgsizemake(ten), 7 );

FillColor = [uicolorgraycolor];

[FillColorSetfill];

[Pathfill];

cgcontextrestoregstate(context); // Restore Context State

cgcontextsavegstate(context); // Save Context State

CGCONTEXTTRANSLATECTM(context,N.);

// define gradients

cggradientref mygradient;

// Declare color space

cgcolorspaceref colorspace =Cgcolorspacecreatedevicergb();

cgfloat components[8] = {1.0,0.0, 0.0, 1.0,

0.0, 0.0, 1.0, 1.0

};

cgfloat locations[2] = {0.2,0.8};

int num = 2;

Mygradient =cggradientcreatewithcolorcomponents(colorspace, components, locations, num);

    [Pathaddclip ];

cgcontextdrawlineargradient(context, mygradient,cgpointmake(0, 0),cgpointmake(0),0);

cgcolorspacerelease(colorspace);

Cggradientrelease (mygradient);

cgcontextrestoregstate(context);

}

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Draw graphics-Move, rotate, shadow, gradient