iOS画圆、画线

https://blog.csdn.net/csdndimo/article/details/84842727

 

iOS画圆、画线

UIView:

 

1.  
   - (void)drawRect:(CGRect)rect {
2.  
   [super drawRect:rect];
3.  
    
4.  
   CGRect frame = CGRectMake(50, 100, 100, 100);
5.  
   /*画填充圆
6.  
   */
7.  
   CGContextRef context = UIGraphicsGetCurrentContext();
8.  
   [[UIColor whiteColor] set];
9.  
   CGContextFillRect(context, rect);
10.  
     
11.  
    CGContextAddEllipseInRect(context, frame);
12.  
    [[UIColor orangeColor] set];
13.  
    CGContextFillPath(context);
14.  
     
15.  
    /*边框圆
16.  
    */
17.  
    CGContextSetRGBStrokeColor(context, 255/255.0, 106/255.0, 0/255.0, 1);
18.  
    CGContextSetLineWidth(context, 5);
19.  
    CGContextAddArc(context, 50, 70, 20, 0, 2*M_PI, 0);
20.  
    CGContextDrawPath(context, kCGPathStroke);
21.  
     
22.  
    /*画直线
23.  
    */
24.  
    CGRect markFrame = CGRectMake(100, 250, 200, 200);
25.  
    [[UIColor orangeColor] set];
26.  
    CGContextSetLineWidth(context, 4);
27.  
    CGPoint points[5];
28.  
    points[0] = CGPointMake(markFrame.origin.x,markFrame.origin.y);
29.  
    points[1] = CGPointMake(markFrame.origin.x+markFrame.size.width/4, markFrame.origin.y+markFrame.size.height/2);
30.  
    points[2] = CGPointMake(markFrame.origin.x+markFrame.size.width/2, markFrame.origin.y+5);
31.  
    points[3] = CGPointMake(markFrame.origin.x+markFrame.size.width/4*3,markFrame.origin.y+markFrame.size.height/2);
32.  
    points[4] = CGPointMake(markFrame.origin.x+markFrame.size.width, markFrame.origin.y);
33.  
     
34.  
    CGContextAddLines(context, points, 5);
35.  
    CGContextDrawPath(context, kCGPathStroke);
36.  
    //边框圆
37.  
    CGContextSetLineWidth(context, 5);
38.  
    CGContextAddArc(context, markFrame.origin.x+markFrame.size.width/2, markFrame.origin.y+markFrame.size.height/2, markFrame.size.height/2-2, 0, 2*M_PI, 0);
39.  
    CGContextDrawPath(context, kCGPathStroke);
40.  
     
41.  
    /*曲线
42.  
    */
43.  
    [[UIColor redColor] set];
44.  
     
45.  
    CGContextSetLineWidth(context, 4.0);
46.  
    CGContextSetStrokeColorWithColor(context, [UIColor orangeColor].CGColor);
47.  
    CGContextMoveToPoint(context, 300, 370);
48.  
    CGContextAddCurveToPoint(context, 193, 320, 100, 370, 100, 370);
49.  
    CGContextStrokePath(context);
50.  
    }
51.  
     

 

 

UIViewController：

 

1.  
   #import "DrawViewController.h"
2.  
    
3.  
   @interface DrawViewController ()
4.  
    
5.  
   @end
6.  
    
7.  
   @implementation DrawViewController
8.  
    
9.  
   - (void)viewDidLoad {
10.  
    [super viewDidLoad];
11.  
     
12.  
    /*
13.  
    *画虚线圆
14.  
    */
15.  
    CAShapeLayer *dotteLine = [CAShapeLayer layer];
16.  
    CGMutablePathRef dottePath = CGPathCreateMutable();
17.  
    dotteLine.lineWidth = 2.0f ;
18.  
    dotteLine.strokeColor = [UIColor orangeColor].CGColor;
19.  
    dotteLine.fillColor = [UIColor clearColor].CGColor;
20.  
    CGPathAddEllipseInRect(dottePath, nil, CGRectMake(50.0f, 50.0f, 200.0f, 200.0f));
21.  
    dotteLine.path = dottePath;
22.  
    NSArray *arr = [[NSArray alloc] initWithObjects:[NSNumber numberWithInt:10],[NSNumber numberWithInt:5], nil];
23.  
    dotteLine.lineDashPhase = 1.0;
24.  
    dotteLine.lineDashPattern = arr;
25.  
    CGPathRelease(dottePath);
26.  
    [self.view.layer addSublayer:dotteLine];
27.  
     
28.  
    /*
29.  
    *画实线圆
30.  
    */
31.  
    CAShapeLayer *solidLine = [CAShapeLayer layer];
32.  
    CGMutablePathRef solidPath = CGPathCreateMutable();
33.  
    solidLine.lineWidth = 2.0f ;
34.  
    solidLine.strokeColor = [UIColor orangeColor].CGColor;
35.  
    solidLine.fillColor = [UIColor clearColor].CGColor;
36.  
    CGPathAddEllipseInRect(solidPath, nil, CGRectMake(50.0f, 300.0f, 200.0f, 200.0f));
37.  
    solidLine.path = solidPath;
38.  
    CGPathRelease(solidPath);
39.  
    [self.view.layer addSublayer:solidLine];
40.  
     
41.  
    /*
42.  
    *画虚线
43.  
    */
44.  
    CAShapeLayer *dotteShapeLayer = [CAShapeLayer layer];
45.  
    CGMutablePathRef dotteShapePath = CGPathCreateMutable();
46.  
    [dotteShapeLayer setFillColor:[[UIColor clearColor] CGColor]];
47.  
    [dotteShapeLayer setStrokeColor:[[UIColor orangeColor] CGColor]];
48.  
    dotteShapeLayer.lineWidth = 2.0f ;
49.  
    NSArray *dotteShapeArr = [[NSArray alloc] initWithObjects:[NSNumber numberWithInt:10],[NSNumber numberWithInt:5], nil];
50.  
    [dotteShapeLayer setLineDashPattern:dotteShapeArr];
51.  
    CGPathMoveToPoint(dotteShapePath, NULL, 20,500);
52.  
    CGPathAddLineToPoint(dotteShapePath, NULL, 20, 285);
53.  
    CGPathAddLineToPoint(dotteShapePath, NULL, 300,285);
54.  
    [dotteShapeLayer setPath:dotteShapePath];
55.  
    CGPathRelease(dotteShapePath);
56.  
    [self.view.layer addSublayer:dotteShapeLayer];
57.  
     
58.  
    /*
59.  
    *画实线
60.  
    */
61.  
    CAShapeLayer *solidShapeLayer = [CAShapeLayer layer];
62.  
    CGMutablePathRef solidShapePath = CGPathCreateMutable();
63.  
    [solidShapeLayer setFillColor:[[UIColor clearColor] CGColor]];
64.  
    [solidShapeLayer setStrokeColor:[[UIColor orangeColor] CGColor]];
65.  
    solidShapeLayer.lineWidth = 2.0f ;
66.  
    CGPathMoveToPoint(solidShapePath, NULL, 20, 265);
67.  
    CGPathAddLineToPoint(solidShapePath, NULL, 300,265);
68.  
    CGPathAddLineToPoint(solidShapePath, NULL, 300,50);
69.  
    [solidShapeLayer setPath:solidShapePath];
70.  
    CGPathRelease(solidShapePath);
71.  
    [self.view.layer addSublayer:solidShapeLayer];
72.  
     
73.  
     
74.  
    }

 

 

 

示图：