tijo Logo Objective-C Source

TJLogoView.h

//
//  TJLogoView.h
//  Logo
//
//  Created by Tim Johnsen on 9/7/15.
//  Copyright (c) 2015 tijo. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface TJLogoView : UIView

@property (nonatomic, assign) CGFloat gridWidth;
@property (nonatomic, assign) CGFloat gridHeight;

@property (nonatomic, strong) UIColor *strokeColor;
@property (nonatomic, assign) CGFloat strokeWidth;

+ (void)saveToPathWithSize:(CGSize)size backgroundColor:(UIColor *)backgroundColor strokeColor:(UIColor *)strokeColor path:(NSString *)path;

@end


//
//  TJLogoView.m
//  Logo
//
//  Created by Tim Johnsen on 9/7/15.
//  Copyright (c) 2015 tijo. All rights reserved.
//

#import "TJLogoView.h"

@implementation TJLogoView

- (instancetype)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) {
        [self updateMetricsFromFrame:frame];
        
        self.strokeColor = [UIColor blackColor];
        self.backgroundColor = [UIColor clearColor];
    }
    return self;
}

- (void)setFrame:(CGRect)frame
{
    [super setFrame:frame];
    
    [self updateMetricsFromFrame:frame];
}

- (void)updateMetricsFromFrame:(CGRect)frame
{
    // Adjust!
    const CGFloat minDimension = MIN(frame.size.width, frame.size.height);
    self.gridWidth = floor(minDimension / 5.0);
    self.gridHeight = floor(self.gridWidth * (48.0 / 52.0));
    self.strokeWidth = floor(self.gridWidth * (20.0 / 58.0));
}

- (void)drawRect:(CGRect)rect
{
    [super drawRect:rect];
    
    CGContextRef context = UIGraphicsGetCurrentContext();
    
    CGContextSetStrokeColorWithColor(context, [self.strokeColor CGColor]);
    
    // T
    
    UIBezierPath *tPath = [[UIBezierPath alloc] init];
    tPath.lineWidth = self.strokeWidth;
    tPath.lineCapStyle = kCGLineCapSquare;
    [tPath moveToPoint:CGPointMake(1 * self.gridWidth, 1 * self.gridHeight)];
    [tPath addLineToPoint:CGPointMake(1 * self.gridWidth, 3 * self.gridHeight)];
    [tPath moveToPoint:CGPointMake(0.5 * self.gridWidth, 1 * self.gridHeight)];
    [tPath addLineToPoint:CGPointMake(1.5 * self.gridWidth, 1 * self.gridHeight)];
    [tPath stroke];
    
    // I

    UIBezierPath *iPath = [[UIBezierPath alloc] init];
    iPath.lineWidth = self.strokeWidth;
    iPath.lineCapStyle = kCGLineCapSquare;
    [iPath moveToPoint:CGPointMake(2 * self.gridWidth, 1 * self.gridHeight)];
    [iPath addLineToPoint:CGPointMake(2 * self.gridWidth, 3 * self.gridHeight)];
    [iPath stroke];
    
    // I Dot
    
    UIBezierPath *iDotPath = [[UIBezierPath alloc] init];
    iDotPath.lineWidth = self.strokeWidth;
    iDotPath.lineCapStyle = kCGLineCapSquare;
    [iDotPath moveToPoint:CGPointMake(1.5 * self.gridWidth, 0.5 * self.gridHeight)];
    [iDotPath addLineToPoint:CGPointMake(1.5 * self.gridWidth, 0.5 * self.gridHeight - 1.0)];
    [iDotPath stroke];
    
    // J
    
    static const CGFloat kCircleFraction = 0.8;
    
    UIBezierPath *jPath = [[UIBezierPath alloc] init];
    jPath.lineWidth = self.strokeWidth;
    jPath.lineCapStyle = kCGLineCapSquare;
    [jPath moveToPoint:CGPointMake(3 * self.gridWidth, 1 * self.gridHeight)];
    [jPath addLineToPoint:CGPointMake(3 * self.gridWidth, 3 * self.gridHeight)];
    [jPath addArcWithCenter:CGPointMake(2 * self.gridWidth, 3 * self.gridHeight) radius:self.gridWidth startAngle:0.0 endAngle:M_PI * kCircleFraction clockwise:YES];
    [jPath stroke];
    
    // J Dot
    
    UIBezierPath *jDotPath = [[UIBezierPath alloc] init];
    jDotPath.lineWidth = self.strokeWidth;
    jDotPath.lineCapStyle = kCGLineCapSquare;
    [jDotPath moveToPoint:CGPointMake(2.5 * self.gridWidth, 0.5 * self.gridHeight)];
    [jDotPath addLineToPoint:CGPointMake(2.5 * self.gridWidth, 0.5 * self.gridHeight - 1.0)];
    [jDotPath stroke];
    
    // O
    
    UIBezierPath *oPath = [[UIBezierPath alloc] init];
    oPath.lineWidth = self.strokeWidth;
    oPath.lineCapStyle = kCGLineCapSquare;
    [oPath moveToPoint:CGPointMake(3.5 * self.gridWidth, 1.5 * self.gridHeight)];
    [oPath addLineToPoint:CGPointMake(3.5 * self.gridWidth, 2.5 * self.gridHeight)];
    [oPath addArcWithCenter:CGPointMake(4 * self.gridWidth, 2.5 * self.gridHeight) radius:self.gridWidth / 2.0 startAngle:M_PI endAngle:0.0 clockwise:NO];
    [oPath addLineToPoint:CGPointMake(4.5 * self.gridWidth, 1.5 * self.gridHeight)];
    [oPath addArcWithCenter:CGPointMake(4 * self.gridWidth, 1.5 * self.gridHeight) radius:self.gridWidth / 2.0 startAngle:0.0 endAngle:M_PI clockwise:NO];
    [oPath closePath];
    [oPath stroke];
}

- (void)drawGridWithColor:(UIColor *)color width:(CGFloat)width
{
    static const NSInteger horizontalGridLineCount = 10;
    static const NSInteger verticalGridLineCount = 8;
    
    CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(), [color CGColor]);
    
    for (NSInteger x = 1; x < horizontalGridLineCount; x++) {
        UIBezierPath *verticalLinePath = [[UIBezierPath alloc] init];
        verticalLinePath.lineWidth = width;
        [verticalLinePath moveToPoint:CGPointMake(self.gridWidth * x / 2.0, 0)];
        [verticalLinePath addLineToPoint:CGPointMake(self.gridWidth * x / 2.0, verticalGridLineCount * self.gridHeight / 2.0)];
        [verticalLinePath stroke];
    }
    
    for (NSInteger y = 1; y < verticalGridLineCount; y++) {
        UIBezierPath *horizontalLinePath = [[UIBezierPath alloc] init];
        horizontalLinePath.lineWidth = width;
        [horizontalLinePath moveToPoint:CGPointMake(0, self.gridHeight * y / 2.0)];
        [horizontalLinePath addLineToPoint:CGPointMake(horizontalGridLineCount * self.gridWidth / 2.0, self.gridHeight * y / 2.0)];
        [horizontalLinePath stroke];
    }
}

+ (void)saveToPathWithSize:(CGSize)size backgroundColor:(UIColor *)backgroundColor strokeColor:(UIColor *)strokeColor path:(NSString *)path
{
    TJLogoView *logoView = [[TJLogoView alloc] initWithFrame:CGRectMake(0.0, 0.0, size.width, size.height)];
    logoView.strokeColor = strokeColor;
    logoView.backgroundColor = backgroundColor;
    UIGraphicsBeginImageContextWithOptions(logoView.bounds.size, NO, 2.0);
    [logoView.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    [UIImagePNGRepresentation(image) writeToFile:path atomically:YES];
}

@end