ios中畫出直線

本人項目中  在地圖 類 後面建立了個UIView類

。h檔案

#import <UIKit/UIKit.h>

#define _WEITH 320/3

#define _HEIGHT 330/3

@interface view : UIView

@end

。m檔案

//

//  view.m

//  122CheZhu01

//

//  Created by xumin on 7/8/13.

//  Copyright (c) 2013 xumin. All rights reserved.

//

#import "view.h"

@implementation view

- (id)initWithFrame:(CGRect)frame

{

   
self = [super
initWithFrame:frame];

   
if (self) {

        self.backgroundColor = [UIColor
clearColor];

    }

    return
self;

}

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

- (void)drawRect:(CGRect)rect

{

    CGContextRef context =
UIGraphicsGetCurrentContext();

    

    CGContextSetStrokeColorWithColor(context, [UIColor
blueColor].CGColor);

    

    

    CGContextMoveToPoint(context,
0, _HEIGHT);

    CGContextAddLineToPoint(context,
320,
_HEIGHT);

    CGContextMoveToPoint(context,
0, _HEIGHT*2);

    CGContextAddLineToPoint(context,
320,
_HEIGHT*2);

    CGContextMoveToPoint(context,
_WEITH,
0);

    CGContextAddLineToPoint(context,
_WEITH,
self.frame.size.height);

    CGContextMoveToPoint(context,
_WEITH*2,
0);

    CGContextAddLineToPoint(context,
_WEITH*2,
self.frame.size.height);

    CGContextStrokePath(context);

    CGContextClosePath(context);

}

@end

畫出9 宮格的直線