画图

港控/mmm° 2022-08-01 12:20 257阅读 0赞

//
    //  MyView.h
    //  AppUI组件学习
    //
    //  Created by 麦子 on 15/6/24.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    
    @interface MyView : UIView
    
    @property(nonatomic,assign) CGPoint point;
    
    @end

//
    //  MyView.m
    //  AppUI组件学习
    //
    //  Created by 麦子 on 15/6/24.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import "MyView.h"
    
    @implementation MyView
    
    @synthesize point;
    
    - (instancetype)initWithFrame:(CGRect)frameA{
    
        self = [super initWithFrame:frameA];
        if (self) {
            self.backgroundColor = [UIColor orangeColor];
            point.x = 10;
            point.y = 300;
        }
        return self;
    }
    // 画图
    - (void)drawRect:(CGRect)rect{
    
    //    point.x+=5;
        point.y+=5;
        
        // 获取上下文， 获取画布
        CGContextRef context = UIGraphicsGetCurrentContext();
        // 画线 起点
        CGContextMoveToPoint(context, 0, 0);
        // 终点
        CGContextAddLineToPoint(context, 200,200);
        // 线涂色
        CGContextStrokePath(context);
        
        
        // 画矩形
        CGRect cgrect = CGRectMake(100, 100, 200, 200);
        CGContextAddRect(context, cgrect);
        CGContextStrokePath(context);
        
        CGRect rect2 = CGRectMake(120, 120, 200, 200);
        CGContextStrokeRect(context, rect2);
        
        // 实心矩形
        CGContextFillRect(context, rect2);
        
        // 画圆
        CGContextStrokeEllipseInRect(context, CGRectMake(10, 200, 100, 100));
        
        // 实心圆
        CGContextFillEllipseInRect(context, CGRectMake(point.x, point.y, 100, 100));
        
        // 画文字
        NSString *str = @"see you !";
        [str drawAtPoint:CGPointMake(10, 400) withAttributes:nil];
        
        
        // 画图片
        UIImage *image = [UIImage imageNamed:@"tupian5.jpg"];
        [image drawAtPoint:CGPointMake(10, 450)];
        
        
    }
    
    
    @end

//
    //  DrawViewController.m
    //  AppUI组件学习
    //
    //  Created by 麦子 on 15/6/24.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import "DrawViewController.h"
    #import "MyView.h"
    
    @interface DrawViewController ()
    
    @end
    
    @implementation DrawViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
         self.title = @"画视图";
        MyView *view = [[MyView alloc] init];
        self.view = view;
        
        [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(timeBusiness:) userInfo:nil repeats:YES];
    }
    
    
    - (void)timeBusiness:(NSTimer *)timer{
    
       
        [self.view setNeedsDisplay];
        
         // 干掉定时器
    //    [timer invalidate];
        
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    /*
    #pragma mark - Navigation
    
    // In a storyboard-based application, you will often want to do a little preparation before navigation
    - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
        // Get the new view controller using [segue destinationViewController].
        // Pass the selected object to the new view controller.
    }
    */
    
    @end