Quartz2D IOS代碼繪圖

//

//  ViewController.m

//  Quartz2DTest

//

//  Created by dc008 on 15/12/7.

//  Copyright © 2015年 CXY. All rights reserved.

//

#import "ViewController.h"

#import "MyView.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    MyView *myView = [[MyView alloc]initWithFrame:CGRectMake(0, 0, 375, 667)];

    myView.backgroundColor = [UIColor grayColor];

    [self.view addSubview:myView];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

//

//  MyView.m

//  Quartz2DTest

//

//  Created by dc008 on 15/12/7.

//  Copyright © 2015年 CXY. All rights reserved.

//

#import "MyView.h"

@implementation MyView

- (void)drawRect:(CGRect)rect {

    CGContextRef ctx = UIGraphicsGetCurrentContext();

    [self drawLine];

    [self drawEllipse:ctx];

    [self drawOneCurve:ctx];

}

//設置線

- (void)drawLine{

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextRef contextOne = UIGraphicsGetCurrentContext();

    CGContextRef contextTwo = UIGraphicsGetCurrentContext();

    CGContextRef contextFour = UIGraphicsGetCurrentContext();

    CGContextRef contextFive = UIGraphicsGetCurrentContext();

    

    CGContextMoveToPoint(context, 140, 300);

    CGContextAddLineToPoint(context,260, 300);

    

    CGContextMoveToPoint(contextOne,167, 340);

    CGContextAddLineToPoint(contextOne, 230, 340);

    

    CGContextMoveToPoint(contextTwo, 120, 340);

    CGContextAddLineToPoint(contextTwo, 140, 340);

    

    CGContextMoveToPoint(contextFour, 260, 340);

    CGContextAddLineToPoint(contextFour, 280, 340);

    

    CGContextMoveToPoint(contextFive, 160, 320);

    CGContextAddLineToPoint(contextFive, 230, 320);

    

    [[UIColor blackColor]set];

    CGContextSetLineWidth(context, 3);

    CGContextSetLineWidth(contextOne, 3);

    CGContextSetLineWidth(contextTwo, 3);

    

    CGContextDrawPath(context, kCGPathFillStroke);

    CGContextDrawPath(contextOne, kCGPathFillStroke);

    CGContextDrawPath(contextTwo, kCGPathFillStroke);

}

//設置輪胎（圓）

- (void)drawEllipse : (CGContextRef)context{

    CGRect rectOne = CGRectMake(140, 330, 30, 30);

    CGRect rectTwo = CGRectMake(230, 330, 30, 30);

    CGRect rectThree = CGRectMake(240, 340, 10, 10);

    CGRect rectFour = CGRectMake(150, 340, 10, 10);

    CGContextAddEllipseInRect(context, rectOne);

    CGContextAddEllipseInRect(context, rectTwo);

    CGContextAddEllipseInRect(context, rectThree);

    CGContextAddEllipseInRect(context, rectFour);

    [[UIColor blackColor]setStroke];

    CGContextDrawPath(context, kCGPathStroke);

    

}

//#pragma mark 繪製弧

//- (void)drawArc : (CGContextRef) context {

//    CGContextAddArc(context, 375/2.0, 667/2.0, 100, 0.0, M_PI_2, 1);

//    //設置屬性

//    [[UIColor orangeColor]setStroke];

//    //繪製

//    CGContextDrawPath(context, kCGPathStroke);

//}

#pragma mark 繪製貝塞爾曲線

- (void) drawOneCurve : (CGContextRef) context {

    CGContextMoveToPoint(context, 280, 340);//起點位置

    

//cp1x:第一個控制點x座標

//cp1y:第一個控制點y座標

//cp2x:第二個控制點x座標

//cp2y:第二個控制點y座標

//x:結束點x座標

//y:結束點y座標

    CGContextAddQuadCurveToPoint(context, 280, 300, 260, 300);//cp1x和cp1y是終點位置

    //設置曲線屬性

    [[UIColor blackColor]setStroke];

    //繪製

    CGContextDrawPath(context, kCGPathStroke);

    

    CGContextMoveToPoint(context, 120, 340);

    CGContextAddQuadCurveToPoint(context, 100, 300, 140, 300);

    [[UIColor blackColor]setStroke];

    CGContextDrawPath(context, kCGPathStroke);

    

}

@end