我必须从具有多个部分和行的 UITableView
生成 PDf。
我也生成了 pdf,但问题是在创建 PDF 时,它会剪切某些行的数据并显示在其他页面上。
因此,请提出任何有助于创建 PDf 的动态逻辑,该 PDf 在页面上包含数据而无需转到其他 Page 。
另外请在下面找到我用来创建 PDF 的代码。
CGRect priorBounds = self.tableView.bounds;
CGSize fittedSize = [self.tableView sizeThatFits:CGSizeMake(priorBounds.size.width, self.tableView.contentSize.height)];
self.tableView.bounds = CGRectMake(0, 0, 612, fittedSize.height);
CGRect pdfPageBounds = CGRectMake(0, 0, 612, 792); // Change this as your need
NSMutableData *pdfData = [[NSMutableData alloc] init];
UIGraphicsBeginPDFContextToData(pdfData, pdfPageBounds, nil); {
for (CGFloat pageOriginY = 0; pageOriginY < fittedSize.height; pageOriginY += pdfPageBounds.size.height) {
UIGraphicsBeginPDFPageWithInfo(pdfPageBounds, nil);
CGContextSaveGState(UIGraphicsGetCurrentContext()); {
CGContextTranslateCTM(UIGraphicsGetCurrentContext(), 0, -pageOriginY);
[self.tableView.layer renderInContext:UIGraphicsGetCurrentContext()];
} CGContextRestoreGState(UIGraphicsGetCurrentContext());
}
} UIGraphicsEndPDFContext();
self.tableView.bounds = priorBounds; // Reset the tableView
// Use the pdfData to
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
//Get the docs directory
NSString *filePathPDF = [documentsPath stringByAppendingPathComponent"image.pdf"]; //Add the file name
[pdfData writeToFile:filePathPDF atomically:YES];
任何帮助将不胜感激。
在这方面做了很多研发,终于得到了解决方案。 我知道这为时已晚,无法发布上述问题的答案,但我正在发布我的解决方案,以便将来对某人有所帮助。
我用来避免这个问题的技巧是,逐节运行循环并拍摄每个动态单元格的照片。
然后我开始通过下面的函数组合单元格的图像,
- (UIImage*)imageByCombiningImageUIImage*)firstImage withImageUIImage*)secondImage {
UIImage *image1 = firstImage;
UIImage *image2 = secondImage;
CGSize size = CGSizeMake(image1.size.width, image1.size.height + image2.size.height);
UIGraphicsBeginImageContext(size);
[image1 drawInRect:CGRectMake(0,0,size.width, image1.size.height)];
[image2 drawInRect:CGRectMake(0,image1.size.height,size.width, image2.size.height)];
UIImage *finalImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
//set finalImage to IBOulet UIImageView
return finalImage;
}
为了生成组合图像,我使用了以下逻辑。在那我检查了组合图像的高度,它是否大于屏幕尺寸。 以下是我的整个代码逻辑,
CGRect priorBounds = self.tableView.bounds;
CGSize fittedSize = [self.tableView sizeThatFits:CGSizeMake(priorBounds.size.width, self.tableView.contentSize.height)];
self.tableView.bounds = CGRectMake(0, 0, fittedSize.width, fittedSize.height);
pdfViews = [[NSMutableArray alloc] init];
NSMutableData *pdfData = [[NSMutableData alloc] init];
float sections = [self.tableView numberOfSections];
for (int C = 0; C < sections; C++)
{
int rows = 0;
rows = [self.tableView numberOfRowsInSection:C];
for (int I = 0; I < rows; I++)
{
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:I inSection:C];
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
UIGraphicsBeginImageContextWithOptions(cell.bounds.size, cell.opaque, 0.0);
[cell.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *cellImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[pdfViews addObject:cellImage];
}
}
NSArray *pageArray = pdfViews;
UIImage *pdfFinalImage = [[UIImage alloc] init];
UIImage *addOnImage = [[UIImage alloc] init];
NSMutableArray *finalA = [[NSMutableArray alloc] init];
int checkHeight;
checkHeight = 1024;
for (int Z = 0; Z < [pdfViews count]; Z++)
{
if (Z == 0)
{
pdfFinalImage = [pageArray objectAtIndex:Z];
}else if (Z+1 == [pdfViews count])
{
addOnImage = [pageArray objectAtIndex:Z];
if (pdfFinalImage.size.height+addOnImage.size.height > checkHeight)
{
[finalA addObject:pdfFinalImage];
pdfFinalImage = [pageArray objectAtIndex:Z];
[finalA addObject:pdfFinalImage];
}else
{
pdfFinalImage = [self imageByCombiningImage:pdfFinalImage withImage:addOnImage];
[finalA addObject:pdfFinalImage];
}
}else
{
UIImage *heightCheckImage = [pageArray objectAtIndex:Z];
if (pdfFinalImage.size.height+heightCheckImage.size.height > checkHeight)
{
[finalA addObject:pdfFinalImage];
pdfFinalImage = [pageArray objectAtIndex:Z];
}else
{
addOnImage = [pageArray objectAtIndex:Z];
pdfFinalImage = [self imageByCombiningImage:pdfFinalImage withImage:addOnImage];
}
}
}
UIGraphicsBeginPDFContextToData(pdfData, CGRectMake(0, 0, 768, 1024), nil);
for (int IC = 0; IC < [finalA count]; IC++)
{
UIGraphicsBeginPDFPage();
UIImage *mainImage = [finalA objectAtIndex:IC];
NSData *jpegData = UIImageJPEGRepresentation(mainImage, 0.5);
CGDataProviderRef dp = CGDataProviderCreateWithCFData((__bridge CFDataRef)jpegData);
CGImageRef cgImage = CGImageCreateWithJPEGDataProvider(dp, NULL, true, kCGRenderingIntentDefault);
[[UIImage imageWithCGImage:cgImage] drawInRect:CGRectMake(0, 0, mainImage.size.width, mainImage.size.height)];
}
UIGraphicsEndPDFContext();
self.tableView.bounds = priorBounds;
[pdfData writeToFile:tmpPdfPath atomically:YES];
关于ios - 从表格 View 生成 PDF 时出现问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33515228/
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