heightForRowAtIndexPath is called, but the height doesn't change

I have a UITableView called myTableView. What I want the tableView to do is actually quite simple. If the user taps a cell it should expand, in other words an accordion to tableView. This part works fine for me, but I also want the Cell to expand when the user taps a marker on a mapView (I'm using Mapbox). The markers have titles which end with a number, I use this number to determine which cell should expand. Therefore I get the number from the title String and create an NSIndexPath (called localIndexPath) with the number as the row. After that I am selecting the according cell manually with:

self.myTableView.selectRowAtIndexPath(localIndexPath, animated: true, scrollPosition: UITableViewScrollPosition.None)

and after that I call didSelectRowAtIndexPath by:

self.tableView(self.myTableView, didSelectRowAtIndexPath: localIndexPath)

this then calls heightForRowAtIndexPath, which is called successfully both ways, but the actual height only changes when I click the cell, not when i click the marker. My question is why is that and how can I make it work both ways?

Heres the code of all the corresponding methods:

import UIKit

@IBDesignable class PullUpView: UIView, UITableViewDataSource, UITableViewDelegate {


@IBOutlet var tableCell: UIView!
@IBOutlet weak var hideButton: UIButton!
@IBOutlet weak var myTableView: UITableView!

var view:UIView!
var selectedRowIndex = NSIndexPath(forRow: 99, inSection: 0)
var localIndexPath = NSIndexPath(forRow: 99, inSection: 0)
//irrelevant code...

//This is the function I call when I click a marker
func callDidSelectRowAtIndexPathManually(clickedAnnotation: String){
    print("MANUALLY: \(clickedAnnotation)")
    var tourNumber: String = "Default"
    if(clickedAnnotation.characters.count == 18){
        let idx = advance(clickedAnnotation.startIndex, 15)
         tourNumber = String(clickedAnnotation[idx])
      //  print("TOUR NUMMER IST: \(tourNumber)")
     //in case of two digit number
    }else if(clickedAnnotation.characters.count == 19){
        let idx = advance(clickedAnnotation.startIndex, 15)
        let idxTwo = advance(clickedAnnotation.startIndex, 16)
         tourNumber = String(clickedAnnotation[idx]) + String(clickedAnnotation[idxTwo])
       // print("TOUR NUMMER IST: \(tourNumber)")
    }
    let tourNumberAsInt = Int(tourNumber)
    print("TOUR NUMMER IST: \(tourNumberAsInt)")
    if(tourNumberAsInt != nil){
    localIndexPath = NSIndexPath(forRow: tourNumberAsInt!, inSection: 0)
    //The manual selection and call
    self.myTableView.selectRowAtIndexPath(localIndexPath, animated: true, scrollPosition: UITableViewScrollPosition.None)
    self.tableView(self.myTableView, didSelectRowAtIndexPath: localIndexPath)
    getCellHeight(localIndexPath)
    }
}

 //I just store the indexPath in a variable
 func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    NSLog("Und gewählter Index ist:  \(indexPath.row)")
    selectedRowIndex = indexPath
    myTableView.beginUpdates()
    print("did start updates")
    myTableView.endUpdates()
    print("did end updates")
    getCellHeight(selectedRowIndex)

}

//I use this function to check the height of the cell
func getCellHeight(indexPath: NSIndexPath){
    var cell = tableView(myTableView, cellForRowAtIndexPath: indexPath)
    print("HÖHE VON: \(indexPath.row) ist jetzt: \(cell.bounds.height)")
}

//I check wheter selectedIndexPath or localIndexPath are equal to the indexPath argument, if it is the cell should expand
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    if(selectedRowIndex == indexPath && selectedRowIndex.row == indexPath.row || localIndexPath == indexPath){
        print("heightforrow CALLED für: \(indexPath.row)")
        return 200
   }
     print("heightforrow NOT CALLED für: \(indexPath.row)")
    return 60

}

Sorry for the prints in german, but I think you can make up what they mean(ist = is, für = for, höhe von = height of).

And here's the log when I tap the second cell, this is working fine, cell expands as I intended, even tho the heigh reads 44:

did start Updates
heightforrow NOT CALLED für: 0
heightforrow CALLED für: 1
heightforrow NOT CALLED für: 2
did end updates
HÖHE VON: 1 ist jetzt: 44.0

And this is the log when i tap an annotation, the cell isn't expanding visually:

did start updates
heightforrow NOT CALLED für: 0
heightforrow NOT CALLED für: 1
heightforrow CALLED für: 2
heightforrow NOT CALLED für: 0
heightforrow NOT CALLED für: 1
heightforrow CALLED für: 2
did end updates
HÖHE VON: 2 ist jetzt: 44.0
HÖHE VON: 2 ist jetzt: 44.0

Thanks in advance and sorry for my bad english!

Thanks a lot to everybody who tried to help me with this problem!!! I tried everything but I wasn't able to make it work. While Researching I found an approach that works way better for what I wanted than my code posted here. Here's what I'm doing now: https://www.youtube.com/watch?v=VWgr_wNtGPM with the help of: Terminating app due to uncaught exception 'NSRangeException', reason: 'Cannot remove an observer - ios