iOS 画线-圆

画实线、虚线圆

.h

//
//  HanDrawLineTools.h
//  HT-Line
//
//  Created by han on 2022/11/1.
//

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
NS_ASSUME_NONNULL_BEGIN

@interface HanDrawLineTools : NSObject

/// 创建圆环线
/// @param superView 父视图
/// @param lineColor 线颜色
/// @param lineWidth 线宽
/// @param center 圆环中心点
/// @param radius 半径
/// @param startAngle 开始角度
/// @param endAngle 结束角度
/// @param isFull 是否是实线
-(void)createCircleLineWithSuperView:(UIView *)superView lineColor:(UIColor *)lineColor lineWidth:(CGFloat)lineWidth arcCenter:(CGPoint)center radius:(CGFloat)radius startAngle:(CGFloat)startAngle endAngle:(CGFloat)endAngle isFull:(BOOL)isFull;
+(void)createCircleLineWithSuperView:(UIView *)superView lineColor:(UIColor *)lineColor lineWidth:(CGFloat)lineWidth arcCenter:(CGPoint)center radius:(CGFloat)radius startAngle:(CGFloat)startAngle endAngle:(CGFloat)endAngle isFull:(BOOL)isFull;

@end

NS_ASSUME_NONNULL_END

.m

//
//  HanDrawLineTools.m
//  HT-Line
//
//  Created by han on 2022/11/1.
//

#import "HanDrawLineTools.h"

@implementation HanDrawLineTools

/// 创建圆环线
-(void)createCircleLineWithSuperView:(UIView *)superView lineColor:(UIColor *)lineColor lineWidth:(CGFloat)lineWidth arcCenter:(CGPoint)center radius:(CGFloat)radius startAngle:(CGFloat)startAngle endAngle:(CGFloat)endAngle isFull:(BOOL)isFull{
    
    [HanDrawLineTools createCircleLineWithSuperView:superView lineColor:lineColor lineWidth:lineWidth arcCenter:center radius:radius startAngle:startAngle endAngle:endAngle isFull:isFull];
    
}
/// 创建圆环线
+(void)createCircleLineWithSuperView:(UIView *)superView lineColor:(UIColor *)lineColor lineWidth:(CGFloat)lineWidth arcCenter:(CGPoint)center radius:(CGFloat)radius startAngle:(CGFloat)startAngle endAngle:(CGFloat)endAngle isFull:(BOOL)isFull{
    struct CGColor *lineCGColor = lineColor.CGColor;
    // 圆弧虚线
    CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    // 线宽
    shapeLayer.lineWidth = lineWidth;
    // 端点样式
    shapeLayer.lineCap = kCALineCapButt;
    // 终点处理
    shapeLayer.lineJoin = kCALineCapButt;
    // 线条的颜色
    shapeLayer.strokeColor = lineCGColor;
    // 背景填充色
    shapeLayer.fillColor = [UIColor clearColor].CGColor;
    if (!isFull) {
        // 设置线宽、线间距（虚线）
        [shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:10], [NSNumber numberWithInt:5], nil]];
    }
    UIBezierPath* path = [UIBezierPath bezierPathWithArcCenter:center
                                                        radius:radius
                                                    startAngle:startAngle
                                                      endAngle:endAngle
                                                     clockwise:YES];
    [path stroke];
    shapeLayer.path = [path CGPath];
    [superView.layer addSublayer:shapeLayer];
}

@end

用法

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    
    CGFloat height = self.view.frame.size.height;
    CGFloat radius = self.view.frame.size.width/2 ;
    CGFloat lineWidth = 1.5;
    UIColor *lineColor = [[UIColor alloc] initWithRed:0 green:0 blue:0 alpha:0.5];
    CGPoint center = CGPointMake(self.view.frame.size.width/2, height/2);
    
    CGFloat startAngle = M_PI;
    CGFloat endAngle = M_PI * -0.75;
    
    CGFloat startAngle2 = M_PI * -0.75;
    CGFloat endAngle2 = 0;
    
    CGFloat startAngle3 = 0;
    CGFloat endAngle3 = M_PI * 0.5;
    
    CGFloat startAngle4 = M_PI * 0.5;
    CGFloat endAngle4 = M_PI;
    
   
    [HanDrawLineTools createCircleLineWithSuperView:self.view lineColor:lineColor lineWidth:lineWidth arcCenter:center radius:radius startAngle:startAngle endAngle:endAngle isFull:YES];
    [HanDrawLineTools createCircleLineWithSuperView:self.view lineColor:lineColor lineWidth:lineWidth arcCenter:center radius:radius startAngle:startAngle2 endAngle:endAngle2 isFull:NO];
    [HanDrawLineTools createCircleLineWithSuperView:self.view lineColor:lineColor lineWidth:lineWidth arcCenter:center radius:radius startAngle:startAngle3 endAngle:endAngle3 isFull:YES];
    [HanDrawLineTools createCircleLineWithSuperView:self.view lineColor:lineColor lineWidth:lineWidth arcCenter:center radius:radius startAngle:startAngle4 endAngle:endAngle4 isFull:NO];
}

效果图