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更多,我只能设法得到它的快照,我想知道是否还有其他方法我可以以PDF格式获取整个tableview快照.这是我尝试过的感谢
- (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,-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];
}
解决方法
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一个魅力..
