Swift PDF创建矩形? [英] Swift PDF create Rectangle?

问题描述

我想在PDF文件上创建一个矩形，但是我不怎么做.创建一些文本或图像很简单，但是我想添加一些形状，例如矩形和圆形.

I would like to create an rectangle on an PDF File, but i dont how to do that. Its simple to create some text or images, but i would like to add some shapes like rectangles and circles.

UIGraphicsBeginPDFPageWithInfo 是否与CGContext相同?

Is the UIGraphicsBeginPDFPageWithInfo the same as the CGContext?

此刻我正在使用它:

UIGraphicsBeginPDFContextToFile(pdfFileName, CGRectZero, nil);
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 612, 792), nil);

// add some text
let mainTitle = "..."
mainTitle.drawInRect(CGRectMake(30, 110, 552, 40), withAttributes: textAttributesBoldLargeHeader)

但是如何添加自定义矩形?

But how to add a custom rectangle?

推荐答案

只需使用UIGraphicsGetCurrentContext()获取PDF绘图上下文 并画上任何东西.简单的例子:

Just get the PDF drawing context with UIGraphicsGetCurrentContext() and draw anything to it. Simple example:

UIGraphicsBeginPDFContextToFile(pdfFileName, CGRectZero, nil);
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 612, 792), nil);

let context = UIGraphicsGetCurrentContext()

CGContextSetFillColorWithColor(context, UIColor.blueColor().CGColor)
let rect = CGRect(x: 10, y: 10, width: 100, height: 200)
CGContextFillRect(context, rect)

UIGraphicsEndPDFContext()

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