SKScene crashing the app while closing the view controller - ios

Question

I am following tutorial to float hearts like Periscope.
Link to Tutorial
To give basic hint, I am posting the code below
let heartHeight: CGFloat = 18.0
let heartsFile = "heart-bubbles.sks"
class HeartBubblesScene : SKScene {
var emitter: SKEmitterNode?
override func didMoveToView(view: SKView) {
scaleMode = .ResizeFill // make scene's size == view's size
//backgroundColor = UIColor.clearColor()
}
func beginBubbling() {
emitter = SKEmitterNode(fileNamed: heartsFile)
let x = floor(size.width / 2.0)
let y = heartHeight
emitter!.position = CGPointMake(x, y)
emitter!.name = "heart-bubbles"
emitter!.targetNode = self
emitter?.numParticlesToEmit = 1
addChild(emitter!)
emitter?.resetSimulation()
}
In my viewdidload, I have code like this to present the scene
heartBubblesView.presentScene(heartBubblesScene)
Where heartBubblesView is a SKView, which I made through an Outlet.
The issue arises when I to and fro to that view controller; suddenly, it crashed and shows me below logical:
SpriteKit`std::__1::__tree_iterator*, int> std::__1::__tree, std::__1::allocator >::find:
0x29fd0f4c <+0>: ldr r3, [r0, #4]!
0x29fd0f50 <+4>: cbz r3, 0x29fd0f82 ; <+54>
0x29fd0f52 <+6>: ldr.w r12, [r1]
0x29fd0f56 <+10>: mov r9, r0
-> 0x29fd0f58 <+12>: ldr r2, [r3, #0x10]
0x29fd0f5a <+14>: cmp r2, r12
0x29fd0f5c <+16>: bhs 0x29fd0f66 ; <+26>
0x29fd0f5e <+18>: ldr r3, [r3, #0x4]
0x29fd0f60 <+20>: cmp r3, #0x0
0x29fd0f62 <+22>: bne 0x29fd0f58 ; <+12>
0x29fd0f64 <+24>: b 0x29fd0f70 ; <+36>
0x29fd0f66 <+26>: ldr r2, [r3]
0x29fd0f68 <+28>: mov r9, r3
0x29fd0f6a <+30>: cmp r2, #0x0
0x29fd0f6c <+32>: mov r3, r2
0x29fd0f6e <+34>: bne 0x29fd0f58 ; <+12>
0x29fd0f70 <+36>: cmp r9, r0
0x29fd0f72 <+38>: beq 0x29fd0f82 ; <+54>
0x29fd0f74 <+40>: ldr.w r2, [r9, #0x10]
0x29fd0f78 <+44>: ldr r1, [r1]
0x29fd0f7a <+46>: cmp r1, r2
0x29fd0f7c <+48>: it lo
0x29fd0f7e <+50>: movlo r9, r0
0x29fd0f80 <+52>: b 0x29fd0f84 ; <+56>
0x29fd0f82 <+54>: mov r9, r0
0x29fd0f84 <+56>: mov r0, r9
0x29fd0f86 <+58>: bx lr
Then I tried to add the deinit to above class
deinit
{
emitter?.targetNode = nil
emitter!.removeAllChildren()
}
That does not work either.

Answer 1

I don't know but I put this below deinitialser method in my view controller with removing all children of that SKScene seems to resolve the issue.
deinit
{
heartBubblesScene.removeAllChildren()
}