iOS 画空心遮罩带虚线

声明文件：

//

//  ReportHotelSummaryMaskView.h

//

//  Created by lyq on 16/6/7.

//  Copyright © 2018年 lyq . All rights reserved.

//

#import <UIKit/UIKit.h>

@interface ReportHotelSummaryMaskView : UIView

- (void)addRect:(CGRect)rect withRadius:(CGFloat)radius;

- (void)showMaskView;

- (void)dismissMaskView;

@end

实现文件：

//

//  ReportHotelSummaryMaskView.m

//  TuJiaMine

//

//  Created by lyq on 2018/12/28.

//  Copyright © 2018年 lyq. All rights reserved.

//

#import "ReportHotelSummaryMaskView.h"

@interface ReportHotelSummaryMaskView ()

@property (nonatomic, strong) CAShapeLayer *fullScreenLayer;

@property (nonatomic, strong) UIBezierPath *fullScreenPath;

@end

@implementation ReportHotelSummaryMaskView

- (instancetype)initWithFrame:(CGRect)frame {

    self = [super initWithFrame:frame];

    if (self) {

        self.backgroundColor = [UIColor clearColor];

        [self configLayerWithFrame:frame];

    }

    return self;

}

-(void)configLayerWithFrame:(CGRect)frame{

    self.fullScreenLayer = [CAShapeLayer layer];

    [self.layer addSublayer:self.fullScreenLayer];

    self.fullScreenLayer.frame = frame;

    self.fullScreenLayer.path = self.fullScreenPath.CGPath;

    self.fullScreenLayer.fillRule = kCAFillRuleEvenOdd;

    self.fullScreenLayer.fillColor = [UIColor colorWithRed:0.0/255 green:0.0/255 blue:0.0/255 alpha:0.7].CGColor;

    self.fullScreenPath = [UIBezierPath bezierPathWithRect:self.frame];

    [self.fullScreenPath setUsesEvenOddFillRule:YES];

}

- (void)addRect:(CGRect)rect withRadius:(CGFloat)radius{

    UIBezierPath *rectPath = [UIBezierPath bezierPathWithRoundedRect:rect cornerRadius:radius];

    [self.fullScreenPath appendPath:rectPath];

    self.fullScreenLayer.path = self.fullScreenPath.CGPath;

    CGRect rect1 = CGRectMake(rect.origin.x - 3, rect.origin.y - 3, rect.size.width + 6, rect.size.height + 6);

    [self drawLineOfDashByCAShapeLayer:3 lineSpacing:2 lineColor:[UIColor whiteColor] rect:rect1];

}

/**

 *  通过 CAShapeLayer 方式绘制虚线

 *

 *  param lineLength:     虚线的宽度

 *  param lineSpacing:    虚线的间距

 *  param lineColor:      虚线的颜色

 **/

- (void)drawLineOfDashByCAShapeLayer:(NSInteger)lineLength lineSpacing:(NSInteger)lineSpacing lineColor:(UIColor *)lineColor rect:(CGRect)rect{

    CAShapeLayer *shapeLayer = [CAShapeLayer layer];

    shapeLayer.frame = self.frame;

    [shapeLayer setFillColor:[UIColor clearColor].CGColor];

    [shapeLayer setStrokeColor:lineColor.CGColor];

    [shapeLayer setLineWidth:1];

    [shapeLayer setLineJoin:kCALineJoinRound];

    [shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInteger:lineLength], [NSNumber numberWithInteger:lineSpacing], nil]];

    CGMutablePathRef path = CGPathCreateMutable();

    CGPathMoveToPoint(path, NULL, rect.origin.x, rect.origin.y);

    CGPathAddLineToPoint(path, NULL,rect.origin.x, rect.origin.y + rect.size.height);

    CGPathAddLineToPoint(path, NULL,rect.origin.x + rect.size.width, rect.origin.y + rect.size.height);

    CGPathAddLineToPoint(path, NULL,rect.origin.x + rect.size.width, rect.origin.y);

    CGPathAddLineToPoint(path, NULL, rect.origin.x, rect.origin.y);

    [shapeLayer setPath:path];

    CGPathRelease(path);

    [self.fullScreenLayer addSublayer:shapeLayer];

}

- (void)showMaskView{

    self.alpha = 0;

    [UIView animateWithDuration:0.3 animations:^{

        self.alpha = 1;

    }];

}

- (void)dismissMaskView{

    __weak typeof(self)weakSelf = self;

    [UIView animateWithDuration:0.3 animations:^{

        weakSelf.alpha = 0;

    } completion:^(BOOL finished) {

        [weakSelf removeFromSuperview];

    }];

}

@end

调用方法：

#import "ViewController.h"

#import "ReportHotelSummaryMaskView.h"

@interface ViewController ()

@property (nonatomic, strong) ReportHotelSummaryMaskView *maskSubView;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    self.maskSubView = [[ReportHotelSummaryMaskView alloc]initWithFrame:self.view.frame];

    [self.view addSubview:self.maskSubView];

    [self.maskSubView addRect:CGRectMake(13, 200, self.view.frame.size.width - 13 * 2, 113) withRadius:6];

}

截图：

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