How to Capture screen shot of complete tableView ios - ios

Question

I have a tableView having 30 rows and I also have a View on the top of tableView(Not in the tableview header) ,I want to capture the complete screen shot of the screen including the View and all the row of tableview but i can only able to capture the visible rows of tableview and the view .Please help me and thanks in advance.
Here is my Code and the screen shot of simulator.
Note(I don't want my View to be in tableview header because it will also scroll when we scroll the tableview thats why the view is fixed)
- (void)viewDidLoad {
[super viewDidLoad];
_myTableView.delegate = self;
_myTableView.dataSource = self;
UIBarButtonItem *next = [[UIBarButtonItem alloc]initWithTitle:#"Next" style:UIBarButtonItemStylePlain target:self action:#selector(nextButtonAction)];
UIBarButtonItem *screenShot = [[UIBarButtonItem alloc]initWithTitle:#"Screenshot" style:UIBarButtonItemStylePlain target:self action:#selector(screenshotButtonAction)];
self.navigationItem.leftBarButtonItem = screenShot;
self.navigationItem.rightBarButtonItem = next;
}
-(void)nextButtonAction
{
NextViewController *myVc = [[UIStoryboard storyboardWithName:#"Main" bundle:nil]instantiateViewControllerWithIdentifier:#"NextViewController"];
NSLog(#"value of image is %#",viewImage);
myVc.myImage = viewImage;
[self.navigationController pushViewController:myVc animated:YES];
}
-(void)screenshotButtonAction
{
UIView *viewToRender = self.myTableView;
CGPoint contentOffset = self.myTableView.contentOffset;
UIGraphicsBeginImageContext(viewToRender.bounds.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextTranslateCTM(ctx, 0,-contentOffset.y ); //-contentOffset.y
[viewToRender.layer renderInContext:ctx];
viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 30;
}
- (UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *myString = #"reused";
UITableViewCell *Cell = [tableView dequeueReusableCellWithIdentifier:myString];
if (Cell == nil)
{
Cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:myString];
}
Cell.textLabel.text = [NSString stringWithFormat:#"This is Cell %ld",indexPath.row];
return Cell;
}

Answer 1

I've changed this code for Swift 3 from Getting a screenshot of a UIScrollView, including offscreen parts
Edit: 2022 - TableView get restored after screenshot
func screenshot() -> UIImage{
var image = UIImage();
UIGraphicsBeginImageContextWithOptions(self.tableView.contentSize, false, UIScreen.main.scale)
// save initial values
let savedContentOffset = self.tableView.contentOffset;
let savedFrame = self.tableView.frame;
let savedBackgroundColor = self.tableView.backgroundColor
// reset offset to top left point
self.tableView.contentOffset = CGPoint(x: 0, y: 0);
// set frame to content size
self.tableView.frame = CGRect(x: 0, y: 0, width: self.tableView.contentSize.width, height: self.tableView.contentSize.height);
// remove background
self.tableView.backgroundColor = self.tableView.backgroundColor;
// make temp view with scroll view content size
// a workaround for issue when image on ipad was drawn incorrectly
let tempView = UIView(frame: CGRect(x: 0, y: 0, width: self.tableView.contentSize.width, height: self.tableView.contentSize.height));
// save superview
let tempSuperView = self.tableView.superview
// Save constraints
guard let superView = self.tableView.superview else {
return UIImage();
}
//get old constraints from table
var oldConstraints: [NSLayoutConstraint] = []
for constraint in superView.constraints {
if constraint.firstItem as? NSObject == self.tableView || constraint.secondItem as? NSObject == self.tableView{
oldConstraints.append(constraint)
}
}
// remove scrollView from old superview
self.tableView.removeFromSuperview()
// and add to tempView
tempView.addSubview(self.tableView)
// render view
// drawViewHierarchyInRect not working correctly
tempView.layer.render(in: UIGraphicsGetCurrentContext()!)
// and get image
image = UIGraphicsGetImageFromCurrentImageContext()!;
// and return everything back
tempView.subviews[0].removeFromSuperview()
tempSuperView?.addSubview(self.tableView)
//activate table's old constraints
NSLayoutConstraint.activate(oldConstraints)
// restore saved settings
self.tableView.contentOffset = savedContentOffset;
self.tableView.frame = savedFrame;
self.tableView.backgroundColor = savedBackgroundColor
UIGraphicsEndImageContext();
return image
}