Create Rich Text codes in IOS +

# Import <coretext/coretext. h>

# Import <quartzcore/quartzcore. h>

Nsattributedstring * getattributedstring (){

Nsmutableattributedstring * attristring = [[nsmutableattributedstring
Alloc] initwithstring: @ "this is test! "]

Autorelease];

// Change the font color of this to red

[Attristring addattribute nsstring *) kctforegroundcolorattributename

Value ID) [uicolor
Redcolor]. cgcolor

Range: nsmakerange (0,
4)];

// Turns is yellow

[Attristring addattribute nsstring *) kctforegroundcolorattributename

Value ID) [uicolor
Yellowcolor]. cgcolor

Range: nsmakerange (5,
2)];

// Change the font of this. The value must be a ctfontref.

[Attristring addattribute nsstring *) kctfontattributename

Value ID) ctfontcreatewithname (cfstringref) [uifont
Boldsystemfontofsize: 14]. fontname,

14,

Null)

Range: nsmakerange (0,
4)];

// Underline this. value can be selected in the specified enumeration.

[Attristring addattribute nsstring *) kctunderlinestyleattributename

Value ID) [nsnumber
Numberwithint: kctunderlinestyledouble]

Range: nsmakerange (0,
4)];

Return attristring;

}

@ Interface tview: uiview

@ End

@ Implementation tview

-(ID) initwithframe :( cgrect) Frame

{

Self = [Super
Initwithframe: frame];

If (Self ){

Self. backgroundcolor = [uicolor
Clearcolor];

}

Return self;

}

-(Void) drawrect :( cgrect) rect {

[Super drawrect: rect];

Nsattributedstring * attristring =
Getattributedstring ();

Cgcontextref CTX =
Uigraphicsgetcurrentcontext ();

Cgcontextconcatctm (CTX,
Cgaffinetransformscale (cgaffinetransformmaketranslation (0, rect. Size. Height ),
1. f,-1.f ));

// Cgcontexttranslatectm (CTX, 0, rect. Size. Height );

// Cgcontextscalectm (CTX, 1,-1 );

Ctframesetterref framesetter =
Ctframesettercreatewithattributedstring (cfattributedstringref) attristring );

Cgmutablepathref Path =
Cgpathcreatemutable ();

Cgpathaddrect (path, null, rect );

Ctframeref frame =
Ctframesettercreateframe (framesetter, cfrangemake (0,
0), path, null );

Cfrelease (PATH );

Cfrelease (framesetter );

Ctframedraw (frame, CTX );

Cfrelease (FRAME );

}

@ End

@ Interface bidviewcontroller ()

@ End

@ Implementation bidviewcontroller

-(Void) viewdidload

{

[Super
Viewdidload];

Tview * view = [[tview
Alloc] initwithframe: cgrectmake (0,
(0,200,200)];

[Self. View
Addsubview: View];

[View release];

Catextlayer * textlayer = [catextlayer
Layer];

Textlayer. String = getattributedstring ();

Textlayer. Frame = cgrectmake (0,
Cgrectgetmaxy (view. Frame ),
200,200 );

[Self. View. Layer
Addsublayer: textlayer];

}

-(Void) viewdidunload

{

[Super
Viewdidunload];

// Release any retained subviews of the main view.

}

-(Bool) shouldautorotatetointerfaceorientation :( uiinterfaceorientation) interfaceorientation

{

Return (interfaceorientation! =
Uiinterfaceorientationportraitupsidedown );

}

@ End

Converted from created by zhangao on 5/30/12.