// Step 1 : Add QuartzCore.framework in your project
// Step 2 : Create following two files .h and .m
// Step 3 : How to Use
// Import your custom file
#import "myDrawingView.h"
// Create object and add to your viewcontroller
myDrawingView *obj = [[myDrawingView alloc] initWithFrame:self.view.frame];
[obj drawSquaresWithNumber:17 andSize:self.view.frame.size];
[self.view addSubview:obj];
//------------------------------------------------------
// filename : myDrawingView.h
#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>
@interface myDrawingView : UIView
{
int nSquares;
CGSize mazeSize;
}
- (void)drawSquaresWithNumber:(int)numberOfSquares andSize:(CGSize)screenSize;
@end
//------------------------------------------------------
// filename : myDrawingView.m
#import "myDrawingView.h"
@implementation myDrawingView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
// Drawing code
// Calculate height and width for each sqaure.
float area = mazeSize.height*mazeSize.width;
float squareSize = (area/nSquares)/100;
NSLog(@"row : %f %f",mazeSize.width/squareSize,mazeSize.height/squareSize);
int row, col;
row = ceil(mazeSize.width/squareSize);
col = ceil(mazeSize.height/squareSize);
float height = mazeSize.height/row;
float width = mazeSize.width/col;
NSLog(@"%d %d",row,col);
NSLog(@"h %f w %f",height,width);
NSLog(@"square size : %f",squareSize);
// Create Current Context To Draw
CGContextRef context = UIGraphicsGetCurrentContext();
// Draw Line
CGContextSetLineWidth(context, 0.5f);
CGContextSetFillColorWithColor(context, [myDrawingView randomColor].CGColor);
CGContextSetStrokeColorWithColor(context, [myDrawingView randomColor].CGColor);
int x ,y, cnt;
x = y = 0;
cnt = 1;
// A loop for number of squares
for(int i=0;i<row;i++)
{
for(int j=0;j<col;j++)
{
if(cnt<=nSquares)
{
CGRect rect = CGRectMake(x, y, width, height);
// Draws Squares
UIBezierPath *path = [UIBezierPath bezierPathWithRect:rect];
// To draw Oval uncomment
// UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:rect];
[path fill];
[path stroke];
}
x += width;
cnt++;
}
x = 0;
y += height;
}
}
+ (UIColor *) randomColor {
CGFloat red = arc4random()%256;
CGFloat blue = arc4random()%256;
CGFloat green = arc4random()%256;
return [UIColor colorWithRed:abs(red)/255.0f green:abs(green)/255.0f blue:abs(blue)/255.0f alpha:1.0];
}
- (void)drawSquaresWithNumber:(int)numberOfSquares andSize:(CGSize)screenSize
{
nSquares = numberOfSquares;
mazeSize = screenSize;
[self setNeedsDisplay];
}
@end