Iphone pie chart tools

You need to draw a pie chart for the project, and add the tool class here:
H file:
[Cpp]

# Import <UIKit/UIKit. h>
# Import <QuartzCore/QuartzCore. h>
 
 
@ Interface CLMView: UIView
{
 
Float spaceHeight; // height
Float scaleY;
NSArray * titleArr; // text
NSArray * valueArr; // Value
NSArray * colorArr; // color
}
 
@ Property (nonatomic, assign) float spaceHeight;
@ Property (nonatomic, assign) float scaleY;
@ Property (nonatomic, retain) NSArray * titleArr;
@ Property (nonatomic, retain) NSArray * valueArr;
@ Property (nonatomic, retain) NSArray * colorArr;
 
@ End

M file:
[Cpp]
# Import "CLMView. h"
 
 
 
# Deprecision K_PI 3.1415
# Define KDGREED (x) * K_PI * 2)
 
 
@ Implementation CLMView
@ Synthesize spaceHeight, scaleY;
@ Synthesize titleArr, valueArr, colorArr;
 
 
-(Id) initWithFrame :( CGRect) frame {
Self = [super initWithFrame: frame];
If (self ){
// Initialization code
Self. backgroundColor = [UIColor colorWithRed: 240.0f/255.0f green: 1 blue: 1 alpha: 1.0];

SpaceHeight = 40;
Scale= 0.4;


}
Return self;
}
 
 
-(Void) drawRect :( CGRect) rect
{
CGContextRef context = UIGraphicsGetCurrentContext ();
// Cgcontextsets

// Anti-aliasing
CGContextSetAllowsAntialiasing (context, TRUE );

// Int arr [5] = {20, 15, 35, 85, 60 };

Float sum = 0;


For (int j = 0; j <[valueArr count]; j ++)
{
Sum + = [[valueArr objectAtIndex: j] floatValue];
}


CGContextMoveToPoint (context, 160,230 );

Float currentangel = 0;

// Pie chart
CGContextSaveGState (context );
CGContextScaleCTM (context, 1.0, scaleY );
 
Currentangel = 0;
For (int I = 0; I <[valueArr count]; I ++)
{
 
Float startAngle = KDGREED (currentangel );

Currentangel + = [[valueArr objectAtIndex: I] floatValue]/sum;
Float endAngle = KDGREED (currentangel );
// Draw the slice above
CGContextMoveToPoint (context, 160,230 );

[[ColorArr objectAtIndex: I % [valueArr count] setFill];

[[UIColor colorWithWhite: 1.0 alpha: 0.8] setStroke];

CGContextAddArc (context, 160,230,150, startAngle, endAngle, 0 );

CGContextClosePath (context );
CGContextDrawPath (context, kCGPathFill );



// Draw the side
Float starx = cos (startAngle) × 150 + 160;
Float stary = sin (startAngle) × 150 + 230;

Float endx = cos (endAngle) * 150 + 160;
Float endy = sin (endAngle) * 150 + 230;

// Float starty1 = stary + spaceHeight;
Float endy1 = endy + spaceHeight;


If (endAngle <K_PI)
{

// Draw the thickness
CGMutablePathRef path = CGPathCreateMutable ();
CGPathMoveToPoint (path, nil, starx, stary );
CGPathAddArc (path, nil, 160,230,150, startAngle, endAngle, 0 );
CGPathAddLineToPoint (path, nil, endx, endy1 );

CGPathAddArc (path, nil, 160,230 + spaceHeight, 150, endAngle, startAngle, 1 );
CGContextAddPath (context, path );

[[ColorArr objectAtIndex: I % [valueArr count] setFill];
[[UIColor colorWithWhite: 0.9 alpha: 1.0] setStroke];

CGContextDrawPath (context, kCGPathFill );

[[UIColor colorWithWhite: 0.1 alpha: 0.4] setFill];
CGContextAddPath (context, path );
CGContextDrawPath (context, kCGPathFill );
}

// Only a radian of 3.14 can draw the thickness of the front.
Else if (startAngle <K_PI)
{
EndAngle = K_PI;
Endx = 10;
Endy1 = 230 + spaceHeight;


// Draw thickness www.2cto.com
CGMutablePathRef path = CGPathCreateMutable ();
CGPathMoveToPoint (path, nil, starx, stary );
CGPathAddArc (path, nil, 160,230,150, startAngle, endAngle, 0 );
CGPathAddLineToPoint (path, nil, endx, endy1 );

CGPathAddArc (path, nil, 160,230 + spaceHeight, 150, endAngle, startAngle, 1 );
CGContextAddPath (context, path );

[[ColorArr objectAtIndex: I % [valueArr count] setFill];
[[UIColor colorWithWhite: 0.9 alpha: 1.0] setStroke];

CGContextDrawPath (context, kCGPathFill );

[[UIColor colorWithWhite: 0.1 alpha: 0.4] setFill];
CGContextAddPath (context, path );
CGContextDrawPath (context, kCGPathFill );
}

Else
// Break
;


// CGContextSetBlendMode (context, kCGBlendModeMultiply );


 
 


 
}



// Overall gradient
CGFloat componets [] = {0.0, 0.0, 0.0, 0.5, 0.0, 0.0, 0.0, 0.1 };

CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB ();

CGGradientRef gradient = CGGradientCreateWithColorComponents (colorspace, componets, nil, 2 );

CGContextDrawRadialGradient (context, gradient, CGPointMake (160,230), 0, CGPointMake (160,230), 150, 0 );

CFRelease (colorspace );
CGGradientRelease (gradient );


CGContextRestoreGState (context );

// Draw text

For (int I = 0; I <[valueArr count]; I ++)
{
Float origionx = 50;
Float origiony = I * 30 + 200;

[[ColorArr objectAtIndex: I % [valueArr count] setFill];

CGContextFillRect (context, CGRectMake (origionx, origiony, 20, 20 ));
CGContextDrawPath (context, kCGPathFill );


If (I <[titleArr count])
{
NSString * title = [titleArr objectAtIndex: I];
[Title drawAtPoint: CGPointMake (origionx + 50, origiony) withFont: [UIFont systemFontOfSize: 16];
}

}

}
 
 
-(Void) dealloc {
[TitleArr release];
[ValueArr release];
[ColorArr release];
[Super dealloc];
}
 
 
@ End

Call: (mainly set titleArr, valueArr, colorArr)
[Cpp]
NSMutableArray * title = [[NSMutableArray alloc] init];
NSMutableArray * value = [[NSMutableArray alloc] init];
NSMutableArray * color = [[NSMutableArray alloc] init];
NSArray * Allcolor = [NSArray arrayWithObjects: [UIColor yellowColor], [UIColor blueColor], [UIColor redColor], [UIColor brownColor], [UIColor purpleColor], [UIColor orangeColor], [UIColor greenColor], [UIColor grayColor],
[UIColor colorWithRed: 135.0f/255.0f green: 206.0f/255.0f blue: 235366f/255.0f alpha: 1],
[UIColor colorWithRed: 240.0f/255.0f green: 1 blue: 1 alpha: 1],
[UIColor colorWithRed: 1 green: 0 blue: 1 alpha: 1],
[UIColor colorWithRed: 0 green: 199.0f/255.0f blue: 140366f/255.0f alpha: 1],
[UIColor colorWithRed: 160.0f/255.0f green: 32.0f/255.0f blue: 240.0f/255.0f alpha: 1],
[UIColor colorWithRed: 124.0f/255.0f green: 252.0f/255.0f blue: 0 alpha: 1],
Nil];

For (int I = 0; I <[self. onetableDatacostchat count]; I ++ ){
Float bilv = [[self. onetableDatacostchat objectAtIndex: I] floatValue]/[self. zongcost floatValue];
Float lastbilv = billv * 100;

[Title addObject: [NSString stringWithFormat: @ "% @ % f % @", [self. onetableDatawenzichat objectAtIndex: I], lastbilv, @ "%"];


[Value addObject: [NSNumber numberWithInt: lastbilv];
[Color addObject: [Allcolor objectAtIndex: I];
}

CLMView * cv = [[CLMView alloc] initWithFrame: CGRectMake (0, 0,320,440)];

Cv. titleArr = title;
Cv. valueArr = value;
Cv. colorArr = color;

[Self. view addSubview: cv];
[Cv release];
[Title release];
[Value release];
[Color release];


From RiverAM's column