• BezierCode 工具使用


    概要   

           今天无意间看到一个视频,发现了一款绘画Bezier 图形绘制并自动生成OC代码的神器, 因此马上先记录下。

      之前一直很纠结如果程序员自己去绘制图片,久那么使用bezier 自己去画吗? 答案是:其实这样很不现实的。

      点击下载地址

    制作Bezier图片

    生成的代码如下:

    CGContextRef context = UIGraphicsGetCurrentContext();
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    
    
    //// Polygon drawing
    UIBezierPath *polygon = [UIBezierPath bezierPath];
    [polygon moveToPoint:CGPointMake(99.098, -3.031)];
    [polygon addLineToPoint:CGPointMake(0, 53.588)];
    [polygon addLineToPoint:CGPointMake(0, 166.826)];
    [polygon addLineToPoint:CGPointMake(99.098, 223.445)];
    [polygon addLineToPoint:CGPointMake(198.195, 166.826)];
    [polygon addLineToPoint:CGPointMake(198.195, 53.588)];
    [polygon closePath];
    
    
    //Polygon gradient declaration
    NSArray *polygonGradientColors = @[(id)[UIColor colorWithRed:0.131 green: 1 blue:0.0236 alpha:1].CGColor,
    	(id)[UIColor colorWithRed:1 green: 1 blue:1 alpha:1].CGColor];
    CGFloat polygonGradientLocations[] = {0.00,1.00};
    CGGradientRef polygonGradient = CGGradientCreateWithColors(colorSpace, (__bridge CFArrayRef)polygonGradientColors, polygonGradientLocations);
    
    //Polygon gradient drawing
    CGContextSaveGState(context);
    {
    	[polygon addClip];
    	CGContextDrawLinearGradient(context, polygonGradient, 
    		CGPointMake(22.016, 41.656), 
    		CGPointMake(195.375, 166.336), 
    		kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation);
    }
    CGContextRestoreGState(context);
    
    [[UIColor colorWithRed:0.329 green: 0.329 blue:0.329 alpha:1] setStroke];
    polygon.lineWidth = 1;
    [polygon stroke];
    
    //// Text drawing
    NSString* text = @"Hello World!"; 
    
    CGRect textRect = CGRectMake(32.281, 72.992, 133.633, 74.43);
    NSMutableParagraphStyle* textStyle = [[NSMutableParagraphStyle defaultParagraphStyle] mutableCopy];
    [textStyle setAlignment:NSTextAlignmentCenter];
    NSDictionary* textFontAttribute = @{NSFontAttributeName: [UIFont fontWithName:@"Helvetica" size:24],
    	 NSForegroundColorAttributeName: [UIColor blackColor],
    	 NSParagraphStyleAttributeName: textStyle};
    
    // Text drawn into textImage to be used as mask
    UIGraphicsBeginImageContextWithOptions(textRect.size, NO, 0);
    CGContextRef textImageContext = UIGraphicsGetCurrentContext();;
    
    CGContextSaveGState(textImageContext);
    CGRect textImageContextRect = CGRectMake(0, 0, 133.633, 74.43);
    [text drawInRect:textImageContextRect withAttributes:textFontAttribute];
    CGContextRestoreGState(textImageContext);
    
    CGImageRef textImageCG = CGBitmapContextCreateImage(textImageContext);
    UIGraphicsEndImageContext();
    
    // Text gradient drawing
    CGContextSaveGState(context);
    {
    	CGContextTranslateCTM(context, 0, 2*CGRectGetMinY(textRect) + CGRectGetHeight(textRect));
    	CGContextScaleCTM(context, 1.0, -1.0);
    	CGContextClipToMask(context, textRect, textImageCG);
    	
    	NSArray *gradientColors = @[(id)[UIColor blackColor].CGColor,
    		(id)[UIColor whiteColor].CGColor];
    	CGFloat gradientLocations[] = {0.00,1.00};
    	CGGradientRef textgradient = CGGradientCreateWithColors(colorSpace, (__bridge CFArrayRef)gradientColors, gradientLocations);
    	CGContextDrawLinearGradient(context, textgradient, 
    		CGPointMake(99.098, 147.422), 
    		CGPointMake(117.562, 110.574), 
    		kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation);
    }
    CGContextRestoreGState(context);
    

    然后自己自定义个View 把这段代码放在 

    KBBezierView.m
    - (void)drawRect:(CGRect)rect { //上面代码写入 }

    完美收工。。。。以后可以画自己很多的绘画了

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  • 原文地址:https://www.cnblogs.com/kingbo/p/11099726.html
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