iphone 그래픽 기초

//

//  DrawingView.h

//  SampleDay7-1

//

//  Created by bit on 11. 5. 24..

//  Copyright 2011 __MyCompanyName__. All rights reserved.

//

#import

typedef enum {

ShapeTypeLine,

ShapeTypeRect,

ShapeTypeEllipse

} ShapeType;

@interface DrawingView : UIView {

CGPoint firstLocation;

CGPoint lastLocation;

UIColor *currentColor;

ShapeType shapeType;

CGRect currentRect;

CGRect redrawRect;

}

@property (nonatomic, assign) CGPoint firstLocation;

@property (nonatomic, assign) CGPoint lastLocation;

@property (nonatomic, retain) UIColor *currentColor;

@property (nonatomic, assign) ShapeType shapeType;

@property (nonatomic, readonly) CGRect currentRect;

@property (nonatomic, assign) CGRect redrawRect;

-(void)drawRect:(CGRect)rect ;

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;

@end

/  DrawingView.m

//  SampleDay7-1

//

//  Created by bit on 11. 5. 24..

//  Copyright 2011 __MyCompanyName__. All rights reserved.

//

#import "DrawingView.h"

@implementation DrawingView

@synthesize firstLocation;

@synthesize lastLocation;

@synthesize currentColor;

@synthesize shapeType;

@synthesize currentRect;

@synthesize redrawRect;

- (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.

}

*/

- (void)dealloc {

    [super dealloc];

}

-(CGRect)currentRect {

return CGRectMake( MIN(firstLocation.x, lastLocation.x), 

  MIN(firstLocation.y, lastLocation.y),

  fabsf(firstLocation.x - lastLocation.x ),

  fabsf(firstLocation.y - lastLocation.y )

  );

}

-(void)drawRect:(CGRect)rect {

[super drawRect:rect];

CGContextRef context = UIGraphicsGetCurrentContext();

CGContextSetLineWidth(context, 2.0);

CGContextSetStrokeColorWithColor(context, currentColor.CGColor);

CGContextSetFillColorWithColor(context, currentColor.CGColor);

switch (shapeType) {

case ShapeTypeLine:

CGContextMoveToPoint(context, firstLocation.x, firstLocation.y);

CGContextAddLineToPoint(context, lastLocation.x, lastLocation.y);

CGContextStrokePath(context);

break;

case ShapeTypeRect:

CGContextAddRect(context, [self currentRect]);

CGContextDrawPath(context, kCGPathFillStroke);

break;

case ShapeTypeEllipse:

CGContextAddEllipseInRect(context, [self currentRect]);

CGContextDrawPath(context, kCGPathFillStroke);

break;

default:

break;

}

//NSLog( @"drawRect" );

//NSLog(@"firstLocation = %f", firstLocation.x );

//NSLog(@"lastLocation = %f", lastLocation.x );

}

-(void)touchesBegan:(NSSet*)touches withEvent:(UIEvent *) event {

NSLog(@"touchesBegang");

UITouch *touch = [touches anyObject];

firstLocation = [touch locationInView:self];

lastLocation = [touch locationInView:self];

redrawRect = CGRectUnion(redrawRect, self.currentRect);

[self setNeedsDisplayInRect:redrawRect];

}

-(void)touchesMoved:(NSSet*)touches withEvent:(UIEvent *) event {

NSLog(@"touchesMoved");

UITouch *touch = [touches anyObject];

lastLocation = [touch locationInView:self];

redrawRect = CGRectUnion(redrawRect, self.currentRect);

[self setNeedsDisplayInRect:redrawRect];

}

-(void)touchesEnded:(NSSet*)touches withEvent:(UIEvent *) event {

NSLog(@"touchesEnded");

UITouch *touch = [touches anyObject];

lastLocation = [touch locationInView:self];

redrawRect = CGRectUnion(redrawRect, self.currentRect);

[self setNeedsDisplayInRect:redrawRect];

}

@end