Quartz 各种绘制图形用法代码,ObjC代码库,德仔网

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【ObjC】 Quartz 各种绘制图形用法
作者:Dezai.CN / 发布于2013/8/20/ 1112
Quartz 实现画图片、写文字、画线、椭圆、矩形、棱形等。

	// Only override drawRect: if you perform custom drawing.
	// An empty implementation adversely affects performance during animation.
	- (void)drawRect:(CGRect)rect
	{
	 CGContextRef context = UIGraphicsGetCurrentContext();
	
	
	
	 /*NO.1画一条线
	
	 CGContextSetRGBStrokeColor(context, 0.5, 0.5, 0.5, 0.5);//线条颜色
	 CGContextMoveToPoint(context, 20, 20);
	 CGContextAddLineToPoint(context, 200,20);
	 CGContextStrokePath(context);
	 */
	
	
	
	 /*NO.2写文字
	
	 CGContextSetLineWidth(context, 1.0);
	 CGContextSetRGBFillColor (context, 0.5, 0.5, 0.5, 0.5);
	 UIFont *font = [UIFont boldSystemFontOfSize:18.0];
	 [@"公司：北京中软科技股份有限公司\n部门：ERP事业部\n姓名：McLiang" drawInRect:CGRectMake(20, 40, 280, 300) withFont:font];
	 */
	
	
	 /*NO.3画一个正方形图形 没有边框
	
	 CGContextSetRGBFillColor(context, 0, 0.25, 0, 0.5);
	 CGContextFillRect(context, CGRectMake(2, 2, 270, 270));
	 CGContextStrokePath(context);
	 */
	
	
	 /*NO.4画正方形边框
	
	 CGContextSetRGBStrokeColor(context, 0.5, 0.5, 0.5, 0.5);//线条颜色
	 CGContextSetLineWidth(context, 2.0);
	 CGContextAddRect(context, CGRectMake(2, 2, 270, 270));
	 CGContextStrokePath(context);
	 */
	
	
	 /*NO.5画方形背景颜色
	
	 CGContextTranslateCTM(context, 0.0f, self.bounds.size.height);
	 CGContextScaleCTM(context, 1.0f, -1.0f);
	 UIGraphicsPushContext(context);
	 CGContextSetLineWidth(context,320);
	 CGContextSetRGBStrokeColor(context, 250.0/255, 250.0/255, 210.0/255, 1.0);
	 CGContextStrokeRect(context, CGRectMake(0, 0, 320, 460));
	 UIGraphicsPopContext();
	 */
	
	 /*NO.6椭圆
	
	 CGRect aRect= CGRectMake(80, 80, 160, 100);
	 CGContextSetRGBStrokeColor(context, 0.6, 0.9, 0, 1.0);
	 CGContextSetLineWidth(context, 3.0);
	 CGContextAddEllipseInRect(context, aRect); //椭圆
	 CGContextDrawPath(context, kCGPathStroke);
	 */
	
	 /*NO.7
	 CGContextBeginPath(context);
	 CGContextSetRGBStrokeColor(context, 0, 0, 1, 1);
	 CGContextMoveToPoint(context, 100, 100);
	 CGContextAddArcToPoint(context, 50, 100, 50, 150, 50);
	 CGContextStrokePath(context);
	 */
	
	 /*NO.8渐变
	 CGContextClip(context);
	 CGColorSpaceRef rgb = CGColorSpaceCreateDeviceRGB();
	 CGFloat colors[] =
	 {
	 204.0 / 255.0, 224.0 / 255.0, 244.0 / 255.0, 1.00,
	 29.0 / 255.0, 156.0 / 255.0, 215.0 / 255.0, 1.00,
	 0.0 / 255.0, 50.0 / 255.0, 126.0 / 255.0, 1.00,
	 };
	 CGGradientRef gradient = CGGradientCreateWithColorComponents
	 (rgb, colors, NULL, sizeof(colors)/(sizeof(colors[0])*4));
	 CGColorSpaceRelease(rgb);
	 CGContextDrawLinearGradient(context, gradient,CGPointMake
	 (0.0,0.0) ,CGPointMake(0.0,self.frame.size.height),
	 kCGGradientDrawsBeforeStartLocation);
	 */
	
	
	 /* NO.9四条线画一个正方形
	 //画线
	 UIColor *aColor = [UIColor colorWithRed:0 green:1.0 blue:0 alpha:0];
	 CGContextSetRGBStrokeColor(context, 1.0, 0, 0, 1.0);
	 CGContextSetFillColorWithColor(context, aColor.CGColor);
	 CGContextSetLineWidth(context, 4.0);
	 CGPoint aPoints[5];
	 aPoints[0] =CGPointMake(60, 60);
	 aPoints[1] =CGPointMake(260, 60);
	 aPoints[2] =CGPointMake(260, 300);
	 aPoints[3] =CGPointMake(60, 300);
	 aPoints[4] =CGPointMake(60, 60);
	 CGContextAddLines(context, aPoints, 5);
	 CGContextDrawPath(context, kCGPathStroke); //开始画线
	 */
	
	
	
	 /* NO.10
	 UIColor *aColor = [UIColor colorWithRed:0 green:1.0 blue:0 alpha:0];
	 CGContextSetRGBStrokeColor(context, 1.0, 0, 0, 1.0);
	 CGContextSetFillColorWithColor(context, aColor.CGColor);
	 //椭圆
	 CGRect aRect= CGRectMake(80, 80, 160, 100);
	 CGContextSetRGBStrokeColor(context, 0.6, 0.9, 0, 1.0);
	 CGContextSetLineWidth(context, 3.0);
	 CGContextSetFillColorWithColor(context, aColor.CGColor);
	 CGContextAddRect(context, rect); //矩形
	 CGContextAddEllipseInRect(context, aRect); //椭圆
	 CGContextDrawPath(context, kCGPathStroke);
	 */
	
	
	
	 /* NO.11
	 画一个实心的圆
	
	 CGContextFillEllipseInRect(context, CGRectMake(95, 95, 100.0, 100));
	 */
	
	
	
	 /*NO.12
	 画一个菱形
	 CGContextSetLineWidth(context, 2.0);
	 CGContextSetStrokeColorWithColor(context, [UIColor blueColor].CGColor);
	 CGContextMoveToPoint(context, 100, 100);
	 CGContextAddLineToPoint(context, 150, 150);
	 CGContextAddLineToPoint(context, 100, 200);
	 CGContextAddLineToPoint(context, 50, 150);
	 CGContextAddLineToPoint(context, 100, 100);
	 CGContextStrokePath(context);
	 */
	
	 /*NO.13 画矩形
	 CGContextSetLineWidth(context, 2.0);
	
	 CGContextSetStrokeColorWithColor(context, [UIColor blueColor].CGColor);
	
	 CGRect rectangle = CGRectMake(60,170,200,80);
	
	 CGContextAddRect(context, rectangle);
	
	 CGContextStrokePath(context);
	 */
	
	
	 /*椭圆
	 CGContextSetLineWidth(context, 2.0);
	
	 CGContextSetStrokeColorWithColor(context, [UIColor blueColor].CGColor);
	
	 CGRect rectangle = CGRectMake(60,170,200,80);
	
	 CGContextAddEllipseInRect(context, rectangle);
	
	 CGContextStrokePath(context);
	 */
	
	 /*用红色填充了一段路径:
	
	 CGContextMoveToPoint(context, 100, 100);
	 CGContextAddLineToPoint(context, 150, 150);
	 CGContextAddLineToPoint(context, 100, 200);
	 CGContextAddLineToPoint(context, 50, 150);
	 CGContextAddLineToPoint(context, 100, 100);
	 CGContextSetFillColorWithColor(context, [UIColor redColor].CGColor);
	 CGContextFillPath(context);
	 */
	
	 /*填充一个蓝色边的红色矩形
	 CGContextSetLineWidth(context, 2.0);
	 CGContextSetStrokeColorWithColor(context, [UIColor blueColor].CGColor);
	 CGRect rectangle = CGRectMake(60,170,200,80);
	 CGContextAddRect(context, rectangle);
	 CGContextStrokePath(context);
	 CGContextSetFillColorWithColor(context, [UIColor redColor].CGColor);
	 CGContextFillRect(context, rectangle);
	 */
	
	 /*画弧
	 //弧线的是通过指定两个切点，还有角度，调用CGContextAddArcToPoint()绘制
	 CGContextSetLineWidth(context, 2.0);
	 CGContextSetStrokeColorWithColor(context, [UIColor blueColor].CGColor);
	 CGContextMoveToPoint(context, 100, 100);
	 CGContextAddArcToPoint(context, 100,200, 300,200, 100);
	 CGContextStrokePath(context);
	 */
	
	
	 /*
	 绘制贝兹曲线
	 //贝兹曲线是通过移动一个起始点，然后通过两个控制点,还有一个中止点，调用CGContextAddCurveToPoint() 函数绘制
	 CGContextSetLineWidth(context, 2.0);
	
	 CGContextSetStrokeColorWithColor(context, [UIColor blueColor].CGColor);
	
	 CGContextMoveToPoint(context, 10, 10);
	
	 CGContextAddCurveToPoint(context, 0, 50, 300, 250, 300, 400);
	
	 CGContextStrokePath(context);
	 */
	
	 /*绘制二次贝兹曲线
	
	 CGContextSetLineWidth(context, 2.0);
	
	 CGContextSetStrokeColorWithColor(context, [UIColor blueColor].CGColor);
	
	 CGContextMoveToPoint(context, 10, 200);
	
	 CGContextAddQuadCurveToPoint(context, 150, 10, 300, 200);
	
	 CGContextStrokePath(context);
	 */
	
	 /*绘制虚线
	 CGContextSetLineWidth(context, 5.0);
	
	 CGContextSetStrokeColorWithColor(context, [UIColor blueColor].CGColor);
	
	 CGFloat dashArray[] = {2,6,4,2};
	
	 CGContextSetLineDash(context, 3, dashArray, 4);//跳过3个再画虚线，所以刚开始有6-（3-2）=5个虚点
	
	 CGContextMoveToPoint(context, 10, 200);
	
	 CGContextAddQuadCurveToPoint(context, 150, 10, 300, 200);
	
	 CGContextStrokePath(context);
	 */
	/*绘制图片
	 NSString* imagePath = [[NSBundle mainBundle] pathForResource:@"dog" ofType:@"png"];
	 UIImage* myImageObj = [[UIImage alloc] initWithContentsOfFile:imagePath];
	 //[myImageObj drawAtPoint:CGPointMake(0, 0)];
	 [myImageObj drawInRect:CGRectMake(0, 0, 320, 480)];
	
	 NSString *s = @"我的小狗";
	
	 [s drawAtPoint:CGPointMake(100, 0) withFont:[UIFont systemFontOfSize:34.0]];
	*/
	
	 /*
	 NSString *path = [[NSBundle mainBundle] pathForResource:@"dog" ofType:@"png"];
	 UIImage *img = [UIImage imageWithContentsOfFile:path];
	 CGImageRef image = img.CGImage;
	 CGContextSaveGState(context);
	 CGRect touchRect = CGRectMake(0, 0, img.size.width, img.size.height);
	 CGContextDrawImage(context, touchRect, image);
	 CGContextRestoreGState(context);
	 */
	
	
	 /*NSString *path = [[NSBundle mainBundle] pathForResource:@"dog" ofType:@"png"];
	 UIImage *img = [UIImage imageWithContentsOfFile:path];
	 CGImageRef image = img.CGImage;
	 CGContextSaveGState(context);
	
	 CGContextRotateCTM(context, M_PI);
	 CGContextTranslateCTM(context, -img.size.width, -img.size.height);
	
	 CGRect touchRect = CGRectMake(0, 0, img.size.width, img.size.height);
	 CGContextDrawImage(context, touchRect, image);
	 CGContextRestoreGState(context);*/
	
	/*
	 NSString *path = [[NSBundle mainBundle] pathForResource:@"dog" ofType:@"png"];
	 UIImage *img = [UIImage imageWithContentsOfFile:path];
	 CGImageRef image = img.CGImage;
	
	 CGContextSaveGState(context);
	
	 CGAffineTransform myAffine = CGAffineTransformMakeRotation(M_PI);
	 myAffine = CGAffineTransformTranslate(myAffine, -img.size.width, -img.size.height);
	 CGContextConcatCTM(context, myAffine);
	
	 CGContextRotateCTM(context, M_PI);
	 CGContextTranslateCTM(context, -img.size.width, -img.size.height);
	
	 CGRect touchRect = CGRectMake(0, 0, img.size.width, img.size.height);
	 CGContextDrawImage(context, touchRect, image);
	 CGContextRestoreGState(context);
	*/
	}
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