IOS绘图

#import "ViewController.h"

#import "DrawView.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIImageView *imageView;

- (IBAction)doTouchButton:(id)sender;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    DrawView *view=[[DrawView alloc]initWithFrame:self.view.frame];

    view.backgroundColor =[UIColor whiteColor];

//    [self.view addSubview:view];//去掉注释后，显示绘图

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

- (IBAction)doTouchButton:(id)sender {

    //小鸡走五角星

    CGMutablePathRef startPath=CGPathCreateMutable();//创建一个路径

    CGPathMoveToPoint(startPath, NULL, 160, 100);

    CGPathAddLineToPoint(startPath, NULL, 220, 280);

    CGPathAddLineToPoint(startPath, NULL, 60, 170);

    CGPathAddLineToPoint(startPath, NULL, 260, 170);

    CGPathAddLineToPoint(startPath, NULL, 100, 280);

    CGPathAddLineToPoint(startPath, NULL, 160, 100);

    CAKeyframeAnimation *animation=[CAKeyframeAnimation  animationWithKeyPath:@"position"];

    animation.duration=5.0;//设置动画时间

    [animation setPath:startPath];//设置路径

    [_imageView.layer addAnimation:animation forKey:@"position"];

}

@end

/********************************************************/

//

//  DrawView.h

//  IOS绘图0817

//

//  Created by 张艳锋 on 15/8/17.

//  Copyright (c) 2015年 张艳锋. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface DrawView : UIView

@end

/********************************************************/

//

#import "DrawView.h"

@implementation DrawView

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

// An empty implementation adversely affects performance during animation.

- (void)drawRect:(CGRect)rect {

    // Drawing code

    CGContextRef context=UIGraphicsGetCurrentContext();//绘制图形上下文

    CGContextSetLineWidth(context, 2.0);//设直线条宽度

    

    

    [[UIColor redColor]setStroke];//设置线条颜色

    

    

    CGPoint point1=CGPointMake(160, 100);//上

    CGPoint point2=CGPointMake(60, 170);//左

    CGPoint point3=CGPointMake(260, 170);//右

    CGPoint point4=CGPointMake(100, 280);//下左

    CGPoint point5=CGPointMake(220, 280);//下右

    CGContextMoveToPoint(context, point1.x, point1.y);

    CGContextAddLineToPoint(context, point5.x, point5.y);

    CGContextAddLineToPoint(context, point2.x, point2.y);

    CGContextAddLineToPoint(context, point3.x, point3.y);

    CGContextAddLineToPoint(context, point4.x, point4.y);

//    CGContextAddLineToPoint(context, point1.x, point1.y);

    

    CGContextClosePath(context);//闭合区域函数

//    CGContextStrokePath(context);

    [[UIColor orangeColor]setFill];//设置填充颜色

    CGContextDrawPath(context, kCGPathFillStroke);//进行描绘函数

//    kCGPathFill,//无边线，包围区域全部填充

//    kCGPathEOFill,//无边线，包围区域重合部分不填充

//    kCGPathStroke,//只显边线，不填充

//    kCGPathFillStroke,//填充又显示边线

//    kCGPathEOFillStroke//有边线包围区域重合部分不填充

   

       //正方形

    //CGContextAddRect矩形

    //CGContextAddEllipseInRect椭圆 圆

    CGContextSetRGBStrokeColor(context, 1, 0, 0, 1);//红色

    CGContextSetLineWidth(context, 1.5);

    CGContextAddRect(context, CGRectMake(100, 60, 80, 80));//正方形

    CGContextAddRect(context, CGRectMake(200, 60, 100, 200));//矩形

    CGContextAddEllipseInRect(context,CGRectMake(50, 100, 100, 60));//椭圆

    CGContextAddEllipseInRect(context,CGRectMake(50, 200, 100, 100));//圆

    CGContextStrokePath(context);

    

   

}