ios開發之--PDF文件生成

寫項目的時候，碰到一個需求，就是在手機端根據指定的文件內容生成PDF文件，並可以保存到手機上，因為以前只是聽說過，沒有真正的去了解過這個需求，通過查閱資料，可以實現這個功能，話不多說，代碼如下：

-(void)creatPDFfile
{
    // 1.創建media box
    CGFloat myPageWidth = self.view.bounds.size.width;
    CGFloat myPageHeight = self.view.bounds.size.height;
    CGRect mediaBox = CGRectMake (0, 0, myPageWidth, myPageHeight);
    
    // 2.設置pdf文檔存儲的路徑
    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.設置當前pdf頁面的屬性
    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.獲取pdf繪圖上下文
    CGContextRef myPDFContext = MyPDFContextCreate (&mediaBox, pathRef);
    
    
    // 5.開始描繪第一頁頁面
    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 ));
    
    // 為一個矩形設置URL鏈接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 ));
    
    // 為一個矩形設置一個跳轉終點
    CGPDFContextAddDestinationAtPoint(myPDFContext, CFSTR("page"), CGPointMake(120.0, 400.0));
    CGPDFContextSetDestinationForRect(myPDFContext, CFSTR("page"), CGRectMake(50.0, 300.0, 100.0, 100.0)); // 跳轉點的name為page
    //    CGPDFContextSetDestinationForRect(myPDFContext, CFSTR("page2"), CGRectMake(50.0, 300.0, 100.0, 100.0)); // 跳轉點的name為page2
    CGContextSetRGBFillColor(myPDFContext, 1, 0, 1, 0.5);
    CGContextFillEllipseInRect(myPDFContext, CGRectMake(50.0, 300.0, 100.0, 100.0));
    
    CGPDFContextEndPage(myPDFContext);
    
    
    // 6.開始描繪第二頁頁面
    // 注意要另外創建一個page dictionary
    CFDictionaryRef page2Dictionary = CFDictionaryCreate(NULL, (const void **) myKeys, (const void **) myValues, 3,&kCFTypeDictionaryKeyCallBacks, & kCFTypeDictionaryValueCallBacks);
    CGPDFContextBeginPage(myPDFContext, page2Dictionary);
    
    // 在左下角畫兩個矩形
    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 ));
    
    // 在右下角寫一段文字:"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));  // 跳轉點的name為page2
    //    CGPDFContextAddDestinationAtPoint(myPDFContext, CFSTR("page"), CGPointMake(120.0, 120.0)); // 跳轉點的name為page
    
    // 為右上角的矩形設置一段file URL鏈接，打開本地文件
    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.創建第三頁內容
    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.釋放創建的對象
    CFRelease(page3Dictionary);
    CFRelease(page2Dictionary);
    CFRelease(pageDictionary);
    CFRelease(myValues[0]);
    CGContextRelease(myPDFContext);
}

獲得圖形上下文：

/*
 * 獲取pdf繪圖上下文
 * inMediaBox指定pdf頁面大小
 * path指定pdf文件保存的路徑
 */
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;
}

 

沙盒內容如下：

至此，一個PDF生成就結束了，目前打開的話，我這邊寫的是使用UIActivity進行打開操作，目前還沒有找到存到到本機的方法，只是從沙盒里面取出來打開！

 

參考：http://blog.csdn.net/jymn_chen/article/details/14209855