I have a PFQueryTableViewController
in which I am trying to learn some tableView interactions.
What I currently have: The tableView cell increases its height on a tap didSelectRowAtIndexPath
or I can basically segue cell related data to next viewController using performSegueWithIdentifier
together with prepareForSegue
using a single tap.
In the below code, if I comment the "Tap code to increases height of tableView cell" code, I can detect double tap. Other wise the single tap increases the height as the code is inside didSelect block.
What I need:
On Single tap, cell height increases or decrease. While the cell height is increased, if I double tap, it should segue cell data to next UIViewController
.
If not, the single tap should increase or decrease the height. And double tap should segue cell data to next UIViewController
Code is as below:
var selectedCellIndexPath: NSIndexPath?
var SelectedCellHeight = CGFloat() // currently set to 480.0 tableView height
var UnselectedCellHeight = CGFloat() // currently set to 300.0 tableView unselected hight
....
override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if let selectedCellIndexPath = selectedCellIndexPath {
if selectedCellIndexPath == indexPath {
return SelectedCellHeight
}
}
return UnselectedCellHeight
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
var cell = tableView.dequeueReusableCellWithIdentifier("cell") as! DataViewTableViewCell!
if cell == nil {
cell = DataViewTableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "cell")
}
// Below is the double Tap gesture recognizer code in which
// The single tap is working, double tap is quite difficult to get
// as the cell height increases on single tap of the cell
let doubleTap = UITapGestureRecognizer()
doubleTap.numberOfTapsRequired = 2
doubleTap.numberOfTouchesRequired = 1
tableView.addGestureRecognizer(doubleTap)
let singleTap = UITapGestureRecognizer()
singleTap.numberOfTapsRequired = 1
singleTap.numberOfTouchesRequired = 1
singleTap.requireGestureRecognizerToFail(doubleTap)
tableView.addGestureRecognizer(singleTap)
// Tap code to increases height of tableView cell
if let selectedCellIndexPath = selectedCellIndexPath {
if selectedCellIndexPath == indexPath {
self.selectedCellIndexPath = nil
cell.postComment.fadeIn()
cell.postCreatorPicture.alpha = 1
cell.postDate.fadeIn()
// cell.postTime.fadeIn()
cell.postCreator.fadeIn()
} else {
self.selectedCellIndexPath = indexPath
}
} else {
selectedCellIndexPath = indexPath
}
tableView.beginUpdates()
tableView.endUpdates()
}
func doubleTap() {
print("Double Tap")
}
func singleTap() {
print("Single Tap")
}
The other way I can make it work is, if I can get NSIndexPath
of selected cell outside of didSelectRowAtIndexPath
code, I can basically use the double tap to perform if else to get the required action. Can you get NSIndexPath
outside the tableView default blocks?
Got it working!
First: Define var customNSIndexPath = NSIndexPath() and add the below code inside the
didSelectRowAtIndexPath
code block.Second: Remove "Tap code to increases height of tableView cell" code from
didSelectRowAtIndexPath
and add to thesingleTap()
function. And perform segue using thedoubleTap()
.This is how you screw up working late without sleeping. It was the easiest thing to do. Thanks
Note: If someone has better solution or this one is wrong in some xyz case, please do comment. If yours is better it would really help others.