IOS Gets the lab string value of the Uicolor object.

-(nsstring *) getcielabstring: (uicolor *) Origincolor {

//Method provided by the Colours class extension

nsdictionary *ciedict = [selfgetcie_labarraybycolor: Origincolor];

return [nsstringstringwithformat:@ "(%0.2f,%0.2f, %0.2f) ",

[ciedict[@ "cie_l"]floatvalue],

[ciedict[@ "cie_a"]floatvalue],

[ciedict[@ "Cie_b"]floatvalue];

}

#pragma mark-lab from Color

-(nsdictionary *) Getcie_labarraybycolor: (uicolor *) Origincolor {

//Convert Color to XYZ format first

nsdictionary *rgba = [selfgetrgbdictionarybycolor: Origincolor];

CGFloat R = [rgba[@ "R"]floatvalue];

CGFloat g = [rgba[@ "G"]floatvalue];

CGFloat b = [rgba[@ "B"]floatvalue];

//Create Deltar block

void (^DELTARGB) (cgfloat *r);

Deltargb = ^ (cgfloat *r) {

*r = (*r >0.04045)? POW ((*r +0.055)/1.055,2.40): (*r/12.92);

};

Deltargb (&R);

Deltargb (&G);

Deltargb (&B);

CGFloat X = r*41.24 + g*35.76 + b*18.05;

CGFloat Y = r*21.26 + g*71.52 + b*7.22;

CGFloat Z = r*1.93 + g*11.92 + b*95.05;

//Convert XYZ to l*a*b*

X = x/95.047;

Y = y/100.000;

Z = z/108.883;

//Create DELTAF block

void (^DELTAF) (cgfloat *f);

Deltaf = ^ (cgfloat *f) {

*f = (*f >pow((6.0/29.0),3.0))? POW (*f,1.0/3.0): (1/3) *POW((29.0/6.0),2.0 ) * *f + 4/29.0;

};

Deltaf (&X);

Deltaf (&y);

Deltaf (&Z);

nsnumber *l = @ (*y-+);

nsnumber *a = @ ( x-y);

nsnumber *b = @ ( y-z);

return@{@ "cie_l": L,

@ "Cie_a": A,

@ "Cie_b": B,

@ "Cie_alpha": rgba[@ "A"};

}

/**

* gets The RGB value of the Uicolor object .

*

* @return Dictionary objects that contain RGB values.

*/

-(nsdictionary *) Getrgbdictionarybycolor: (uicolor *) origincolor

{

cgfloat r=0, g=0, b=0, a=0;

if ([ self respondstoselector:@selector(getRed:green:blue:alpha:)]) {

[Origincolor getred: &r green: &g Blue: &b Alpha:&a];

}

Else {

Const cgfloat *components = cgcolorgetcomponents(origincolor. Cgcolor);

r = components[0];

g = components[1];

b = components[2];

A = components[3];

}

return @{@ "R":@ (R),

@ "G":@ (g),

@ "B":@ (b),

@ "A":@ (a)};

}

IOS Gets the lab string value of the Uicolor object.