如何以PDF格式获取UITableView的快照 [英] How to get a snapshot of UITableView in a PDF format

问题描述

我有一个 UITableView ，其中填充了一些数据，但由于它包含的数据比屏幕的可视区域多，所以我只得到了它的快照，我想知道是否有任何其他方式我可以在pdf中获得整个tableview快照..这是我尝试过的感谢

I have a UITableView which is populated with some data but since it contains data that is more cells than the viewable area of the screen, I only managed to get only the snapshot of it, I want to know if there is any other way I can get the whole tableview snapshot in pdf..this is what I have tried thanks

- (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];
}

推荐答案

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，但这段代码对我来说就像是一个魅力..

i dont know but this code works like a charm for me..

这篇关于如何以PDF格式获取UITableView的快照的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！