ArcView.m

//
//  ArcView.m
//  UIBezierPathExampleForLI
//
//  Created by Volodymyr Andriienko on 2/23/19.
//  Copyright © 2019 VAndrJ. All rights reserved.
//

#import "ArcView.h"

@implementation ArcView

- (void)drawRect:(CGRect)rect {
    [[UIColor blackColor] setStroke];
    let path = [UIBezierPath new];
    let lineWidth = rect.size.height / 30;
    let centerPoint = CGPointMake(CGRectGetMidX(rect), CGRectGetMidY(rect));
    let arcRadius = MIN(rect.size.height / 2, rect.size.width / 2) - lineWidth / 2;
    [path setLineWidth:lineWidth];
    [path addArcWithCenter:centerPoint radius:arcRadius startAngle:0 endAngle:2 * M_PI clockwise:NO];
    [path stroke];
}

@end

CurveView.m

//
//  CurveView.m
//  UIBezierPathExampleForLI
//
//  Created by Volodymyr Andriienko on 2/23/19.
//  Copyright © 2019 VAndrJ. All rights reserved.
//

#import "CurveView.h"

@implementation CurveView

- (void)drawRect:(CGRect)rect {
    [[UIColor blackColor] setStroke];
    let path = [UIBezierPath new];
    let lineWidth = rect.size.height / 30;
    let beginPoint = CGPointMake(CGRectGetMinX(rect), CGRectGetMidY(rect));
    let endPoint = CGPointMake(CGRectGetMaxX(rect), CGRectGetMidY(rect));
    let controlPoint1 = CGPointMake(CGRectGetMidX(rect) / 2, CGRectGetMinY(rect));
    let controlPoint2 = CGPointMake(CGRectGetMidX(rect) * 3 / 2, CGRectGetMaxY(rect));
    [path setLineWidth:lineWidth];
    [path moveToPoint:beginPoint];
    [path addCurveToPoint:endPoint controlPoint1:controlPoint1 controlPoint2:controlPoint2];
    [path stroke];
    
    let path1 = [UIBezierPath new];
    [path1 setLineWidth:rect.size.height / 60];
    [[[UIColor grayColor] colorWithAlphaComponent:0.25] setStroke];
    [path1 moveToPoint:beginPoint];
    [path1 addLineToPoint:controlPoint1];
    [path1 addLineToPoint:controlPoint2];
    [path1 addLineToPoint:endPoint];
    [path1 addLineToPoint:beginPoint];
    [path1 stroke];
}

@end

HeartView.m

//
//  HeartView.m
//  HeartView
//
//  Created by Volodymyr Andriienko on 2/20/19.
//  Copyright © 2019 VAndrJ. All rights reserved.
//

#import "HeartView.h"

@implementation HeartView

- (void)drawRect:(CGRect)rect {
    [[UIColor redColor] setFill];
    [[self getHeartPathForRect:rect] fill];
}

- (UIBezierPath *)getHeartPathForRect:(CGRect)rect {
    let path = [UIBezierPath new];
    let leftCenterPoint = CGPointMake(CGRectGetMidX(rect) / 2, CGRectGetMidY(rect) / 2);
    let rightCenterPoint = CGPointMake(CGRectGetMidX(rect) * 3 / 2, CGRectGetMidY(rect) / 2);
    let arcRadius = rect.size.width / 4;
    let bottomPoint = CGPointMake(CGRectGetMidX(rect), CGRectGetMaxY(rect));
    let leftSidePoint = CGPointMake(CGRectGetMinX(rect), CGRectGetMidY(rect) / 2);
    let leftSideControlPoint = CGPointMake(CGRectGetMinX(rect), CGRectGetMidY(rect));
    let rightSidePoint = CGPointMake(CGRectGetMaxX(rect), CGRectGetMidY(rect) / 2);
    let rightSideControlPoint = CGPointMake(CGRectGetMaxX(rect), CGRectGetMidY(rect));
    [path addArcWithCenter:leftCenterPoint radius:arcRadius startAngle:0 endAngle: M_PI clockwise:NO];
    [path addArcWithCenter:rightCenterPoint radius:arcRadius startAngle:0 endAngle: M_PI clockwise:NO];
    [path moveToPoint:leftSidePoint];
    [path addQuadCurveToPoint:bottomPoint controlPoint:leftSideControlPoint];
    [path addQuadCurveToPoint:rightSidePoint controlPoint:rightSideControlPoint];
    [path closePath];
    return path;
}

@end

LineView.m

//
//  LineView.m
//  UIBezierPathExampleForLI
//
//  Created by Volodymyr Andriienko on 2/23/19.
//  Copyright © 2019 VAndrJ. All rights reserved.
//

#import "LineView.h"

@implementation LineView

- (void)drawRect:(CGRect)rect {
    [[UIColor blackColor] setStroke];
    let path = [UIBezierPath new];
    let lineWidth = rect.size.height / 30;
    let beginPoint = CGPointMake(CGRectGetMinX(rect), CGRectGetMidY(rect));
    let endPoint = CGPointMake(CGRectGetMaxX(rect), CGRectGetMidY(rect));
    [path setLineWidth:lineWidth];
    [path moveToPoint:beginPoint];
    [path addLineToPoint:endPoint];
    [path stroke];
}

@end

QuadCurveView.m

//
//  QuadCurveView.m
//  UIBezierPathExampleForLI
//
//  Created by Volodymyr Andriienko on 2/23/19.
//  Copyright © 2019 VAndrJ. All rights reserved.
//

#import "QuadCurveView.h"

@implementation QuadCurveView

- (void)drawRect:(CGRect)rect {
    [[UIColor blackColor] setStroke];
    let path = [UIBezierPath new];
    let lineWidth = rect.size.height / 30;
    let beginPoint = CGPointMake(CGRectGetMinX(rect), CGRectGetMidY(rect));
    let endPoint = CGPointMake(CGRectGetMaxX(rect), CGRectGetMidY(rect));
    let controlPoint = CGPointMake(CGRectGetMidX(rect), CGRectGetMinY(rect));
    [path setLineWidth:lineWidth];
    [path moveToPoint:beginPoint];
    [path addQuadCurveToPoint:endPoint controlPoint:controlPoint];
    [path stroke];
    
    let path1 = [UIBezierPath new];
    [path1 setLineWidth:rect.size.height / 60];
    [[[UIColor grayColor] colorWithAlphaComponent:0.25] setStroke];
    [path1 moveToPoint:beginPoint];
    [path1 addLineToPoint:controlPoint];
    [path1 addLineToPoint:endPoint];
    [path1 addLineToPoint:beginPoint];
    [path1 stroke];
}

@end