写项目的时候,碰到一个需求,就是在手机端根据指定的文件内容生成PDF文件,并可以保存到手机上,因为以前只是听说过,没有真正的去了解过这个需求,通过查阅资料,可以实现这个功能,话不多说,代码如下:
-(void)creatPDFfile
{
// 1.创建media box
CGFloat myPageWidth = self.view.bounds.size.width;
CGFloat myPageHeight = self.view.bounds.size.height;
CGRect mediaBox = CGRectMake (0, 0, myPageWidth, myPageHeight);
// 2.设置pdf文档存储的路径
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = paths[0];
NSString *filePath = [documentsDirectory stringByAppendingString:@"/test.pdf"];
// NSLog(@"%@", filePath);
const char *cfilePath = [filePath UTF8String];
CFStringRef pathRef = CFStringCreateWithCString(NULL, cfilePath, kCFStringEncodingUTF8);
// 3.设置当前pdf页面的属性
CFStringRef myKeys[3];
CFTypeRef myValues[3];
myKeys[0] = kCGPDFContextMediaBox;
myValues[0] = (CFTypeRef) CFDataCreate(NULL,(const UInt8 *)&mediaBox, sizeof (CGRect));
myKeys[1] = kCGPDFContextTitle;
myValues[1] = CFSTR("我的PDF");
myKeys[2] = kCGPDFContextCreator;
myValues[2] = CFSTR("Jymn_Chen");
CFDictionaryRef pageDictionary = CFDictionaryCreate(NULL, (const void **) myKeys, (const void **) myValues, 3,&kCFTypeDictionaryKeyCallBacks, & kCFTypeDictionaryValueCallBacks);
// 4.获取pdf绘图上下文
CGContextRef myPDFContext = MyPDFContextCreate (&mediaBox, pathRef);
// 5.开始描绘第一页页面
CGPDFContextBeginPage(myPDFContext, pageDictionary);
CGContextSetRGBFillColor (myPDFContext, 1, 0, 0, 1);
CGContextFillRect (myPDFContext, CGRectMake (0, 0, 200, 100 ));
CGContextSetRGBFillColor (myPDFContext, 0, 0, 1, .5);
CGContextFillRect (myPDFContext, CGRectMake (0, 0, 100, 200 ));
// 为一个矩形设置URL链接www.baidu.com
CFURLRef baiduURL = CFURLCreateWithString(NULL, CFSTR("http://www.baidu.com"), NULL);
CGContextSetRGBFillColor (myPDFContext, 0, 0, 0, 1);
CGContextFillRect (myPDFContext, CGRectMake (200, 200, 100, 200 ));
CGPDFContextSetURLForRect(myPDFContext, baiduURL, CGRectMake (200, 200, 100, 200 ));
// 为一个矩形设置一个跳转终点
CGPDFContextAddDestinationAtPoint(myPDFContext, CFSTR("page"), CGPointMake(120.0, 400.0));
CGPDFContextSetDestinationForRect(myPDFContext, CFSTR("page"), CGRectMake(50.0, 300.0, 100.0, 100.0)); // 跳转点的name为page
// CGPDFContextSetDestinationForRect(myPDFContext, CFSTR("page2"), CGRectMake(50.0, 300.0, 100.0, 100.0)); // 跳转点的name为page2
CGContextSetRGBFillColor(myPDFContext, 1, 0, 1, 0.5);
CGContextFillEllipseInRect(myPDFContext, CGRectMake(50.0, 300.0, 100.0, 100.0));
CGPDFContextEndPage(myPDFContext);
// 6.开始描绘第二页页面
// 注意要另外创建一个page dictionary
CFDictionaryRef page2Dictionary = CFDictionaryCreate(NULL, (const void **) myKeys, (const void **) myValues, 3,&kCFTypeDictionaryKeyCallBacks, & kCFTypeDictionaryValueCallBacks);
CGPDFContextBeginPage(myPDFContext, page2Dictionary);
// 在左下角画两个矩形
CGContextSetRGBFillColor (myPDFContext, 1, 0, 0, 1);
CGContextFillRect (myPDFContext, CGRectMake (0, 0, 200, 100 ));
CGContextSetRGBFillColor (myPDFContext, 0, 0, 1, .5);
CGContextFillRect (myPDFContext, CGRectMake (0, 0, 100, 200 ));
// 在右下角写一段文字:"Page 2"
CGContextSelectFont(myPDFContext, "Helvetica", 30, kCGEncodingMacRoman);
CGContextSetTextDrawingMode (myPDFContext, kCGTextFill);
CGContextSetRGBFillColor (myPDFContext, 0, 0, 0, 1);
const char *text = [@"Page 2" UTF8String];
CGContextShowTextAtPoint (myPDFContext, 120, 80, text, strlen(text));
// CGPDFContextAddDestinationAtPoint(myPDFContext, CFSTR("page2"), CGPointMake(120.0, 120.0)); // 跳转点的name为page2
// CGPDFContextAddDestinationAtPoint(myPDFContext, CFSTR("page"), CGPointMake(120.0, 120.0)); // 跳转点的name为page
// 为右上角的矩形设置一段file URL链接,打开本地文件
NSURL *furl = [NSURL fileURLWithPath:@"/Users/one/Library/Application Support/iPhone Simulator/7.0/Applications/3E7CB341-693A-4FE4-8FE5-A827A5210F0A/Documents/test1.pdf"];
CFURLRef fileURL = (__bridge CFURLRef)furl;
CGContextSetRGBFillColor (myPDFContext, 0, 0, 0, 1);
CGContextFillRect (myPDFContext, CGRectMake (200, 200, 100, 200 ));
CGPDFContextSetURLForRect(myPDFContext, fileURL, CGRectMake (200, 200, 100, 200 ));
CGPDFContextEndPage(myPDFContext);
// 7.创建第三页内容
CFDictionaryRef page3Dictionary = CFDictionaryCreate(NULL, (const void **) myKeys, (const void **) myValues, 3,&kCFTypeDictionaryKeyCallBacks, & kCFTypeDictionaryValueCallBacks);
CGPDFContextBeginPage(myPDFContext, page3Dictionary);
CGContextSetRGBFillColor (myPDFContext, 0, 0, 0, 1);
CGPDFContextEndPage(myPDFContext);
// 8.释放创建的对象
CFRelease(page3Dictionary);
CFRelease(page2Dictionary);
CFRelease(pageDictionary);
CFRelease(myValues[0]);
CGContextRelease(myPDFContext);
}
获得图形上下文:
/*
* 获取pdf绘图上下文
* inMediaBox指定pdf页面大小
* path指定pdf文件保存的路径
*/
CGContextRef MyPDFContextCreate (const CGRect *inMediaBox, CFStringRef path)
{
CGContextRef myOutContext = NULL;
CFURLRef url;
CGDataConsumerRef dataConsumer;
url = CFURLCreateWithFileSystemPath (NULL, path, kCFURLPOSIXPathStyle, false);
if (url != NULL)
{
dataConsumer = CGDataConsumerCreateWithURL(url);
if (dataConsumer != NULL)
{
myOutContext = CGPDFContextCreate (dataConsumer, inMediaBox, NULL);
CGDataConsumerRelease (dataConsumer);
}
CFRelease(url);
}
return myOutContext;
}
沙盒内容如下:
image至此,一个PDF生成就结束了,目前打开的话,我这边写的是使用UIActivity进行打开操作,目前还没有找到存到到本机的方法,只是从沙盒里面取出来打开!
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