我有一个UITableView这是填充了一些数据，但因为它包含的数据比屏幕的可视区域更多的细胞，我只设法获得只有它的快照，我想知道是否有任何其他的方式，我可以获得pdf..this整个的tableview快照是什么，我都试过感谢
- (IBAction)clickMe:(id)sender
{
UIView *viewToRender = self.myTableView;
CGPoint contentOffset = self.myTableView.contentOffset;
UIGraphicsBeginImageContext(viewToRender.bounds.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
// KEY: need to translate the context down to the current visible portion of the tablview
CGContextTranslateCTM(ctx, 0, -contentOffset.y);
[viewToRender.layer renderInContext:ctx];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIImageView *myImage=[[UIImageView alloc]initWithImage:image];
UIGraphicsEndImageContext();
[self createPDFfromUIViews:myImage saveToDocumentsWithFileName:@"PDF Name"];
}
- (void)createPDFfromUIViews:(UIView *)myImage saveToDocumentsWithFileName:(NSString *)string
{
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, myImage.bounds, nil);
UIGraphicsBeginPDFPage();
CGContextRef pdfContext = UIGraphicsGetCurrentContext();
// draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData
[myImage.layer renderInContext:pdfContext];
// remove PDF rendering context
UIGraphicsEndPDFContext();
NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString* documentDirectory = [documentDirectories objectAtIndex:0];
NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:string];
NSLog(@"%@",documentDirectoryFilename);
[pdfData writeToFile:documentDirectoryFilename atomically:YES];
}
UIGraphicsBeginImageContext(self.myTableView.contentSize);
[self.myTableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:NO];
[self.myTableView.layer renderInContext:UIGraphicsGetCurrentContext()];
int rows = [self.myTableView numberOfRowsInSection:0];
int numberofRowsInView = 4;
for (int i =0; i < rows/numberofRowsInView; i++) {
[self.myTableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:(i+1)*numberofRowsInView inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:NO];
[self.myTableView.layer renderInContext:UIGraphicsGetCurrentContext()];
}
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIImageView *myImage=[[UIImageView alloc]initWithImage:image];
UIGraphicsEndImageContext();
[self createPDFfromUIViews:myImage saveToDocumentsWithFileName:@"PDF Name"];
我不知道，但此代码的工作对我来说就像魅力..
这里是你如何能做到这一点无需滚动的实现代码如下。 只需增加滚动视图的contentSize的高度。 PDF的质量也比较好，如果你不通过走UIImage 。 这是从我UITableView在斯威夫特扩展。 这样的评论并不总是我的代码是从这里和那里偷来的。
func toPDF(fileName: String) -> String {
// Don't include scroll indicators in file
self.showsVerticalScrollIndicator = false
// Creates a mutable data object for updating with binary data, like a byte array
let pdfData = NSMutableData()
// Change the frame size to include all data
let originalFrame = self.frame
self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, self.contentSize.width, self.contentSize.height)
// Points the pdf converter to the mutable data object and to the UIView to be converted
UIGraphicsBeginPDFContextToData(pdfData, self.bounds, nil)
UIGraphicsBeginPDFPage()
let pdfContext = UIGraphicsGetCurrentContext();
// Draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData
self.layer.renderInContext(pdfContext!)
// Remove PDF rendering context
UIGraphicsEndPDFContext()
// Retrieves the document directories from the iOS device
let documentDirectories: NSArray = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
let documentDirectory = documentDirectories.objectAtIndex(0)
let documentDirectoryFilename = documentDirectory.stringByAppendingPathComponent(fileName);
// Instructs the mutable data object to write its context to a file on disk
pdfData.writeToFile(documentDirectoryFilename, atomically: true)
// Back to normal size
self.frame = originalFrame
// Put back the scroll indicator
self.showsVerticalScrollIndicator = true
return documentDirectoryFilename
}
有没有屏幕外的细胞，因为它们一旦他们滚动到可视屏幕的回收。 相反screenshoting的UITableView的，你应该考虑创建使用核心文本的PDF版本。 也许你能适应这个例子 。
根据输入电压的回答（也可用于快照UIScrollViews）：
UIGraphicsBeginPDFContextToData(pdfData, CGRectMakeWithSize(0, 0, self.productsTable.contentSize), nil);
UIGraphicsBeginPDFPage();
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
[self.productsTable scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:NO];
[self.productsTable.layer renderInContext:UIGraphicsGetCurrentContext()];
CGFloat screensInTable = self.productsTable.contentSize.height / self.productsTable.height;
for (int i = 1; i < screensInTable; i++) {
CGPoint contentOffset = CGPointMake(0, i * self.productsTable.height);
[self.productsTable setContentOffset:contentOffset animated:NO];
[self.productsTable.layer renderInContext:UIGraphicsGetCurrentContext()];
}
UIGraphicsEndPDFContext();
我认为每个人都忘记了UITableView是一个UIScrollView毕竟。 没有必要计算单元，高度等。您可以简单地创建与您的上下文contentSize ，设置tableView.frame.size = tableView.contentSize和背景渲染。
请看这个例子
UIGraphicsBeginImageContext(tableView.contentSize)
let context = UIGraphicsGetCurrentContext()
let cachedOffset = CGPoint(x:tableView.contentOffset.x , y:tableView.contentOffset.y)
let cachedFrame = tableView.frame
tableView.contentOffset = .zero
tableView.frame = CGRect(x: 0, y: 0, width: tableView.contentSize.width, height: tableView.contentSize.height)
tableView.layer.render(in: context)
tableView.frame = cachedFrame
tableView.contentOffset = cachedOffset
if let image = UIGraphicsGetImageFromCurrentImageContext() {
let imageView = UIImageView(image: image)
self.createPDF(fromUIViews:myImage saveToDocumentsWithFileName:"PDF Name")
}
UIGraphicsEndImageContext()
