Force advancing on iOS if advancing by 0

Similar to Android: https://github.com/rive-app/rive/pull/8725

With changes from Option C, the C++ runtime will report that an animation should not continue if advancing by 0. This causes the iOS advance logic to break, and if stopping / pausing and then playing, the advance by 0 will continually return false, not allowing an animation to play again.

Diffs=
d527114521 Force advancing on iOS if advancing by 0 (#8766)

Co-authored-by: David Skuza <[email protected]>

.rive_head

@@ -1 +1 @@
-14dcaa0cdedd07c92b77bc013567251ffc29b2c6
+d5271145212650f72b01b239afb4f5607ee1a9b6

Source/RiveView.swift

@@ -355,15 +355,19 @@ open class RiveView: RiveRendererView {
                     RiveLogger.log(view: self, event: .eventReceived(event.name()))
                     stateMachineDelegate?.onRiveEventReceived?(onRiveEvent: event)
                 }
-            }    
-            isPlaying = stateMachine.advance(by: delta) && wasPlaying
-
+            }
+            var shouldAdvance = stateMachine.advance(by: delta)
+            if delta == 0 {
+                shouldAdvance = true
+            }
+            isPlaying = shouldAdvance && wasPlaying
+
             if let delegate = stateMachineDelegate {
                 stateMachine.stateChanges().forEach { delegate.stateMachine?(stateMachine, didChangeState: $0) }
             }
         } else if let animation = riveModel?.animation {
             isPlaying = animation.advance(by: delta) && wasPlaying
-            
+
             if isPlaying {
                 if animation.didLoop() {
                     playerDelegate?.player(loopedWithModel: riveModel, type: Int(animation.loop()))

Tests/RiveDelegatesTest.swift

@@ -342,7 +342,7 @@ class DelegatesTest: XCTestCase {
         XCTAssertEqual(delegate.stateMachineStates[1], "ExitState")
 
         // takes an extra advance to trigger
-        view.advance(delta:0)
+        view.advance(delta:0.1)
         XCTAssertEqual(delegate.stateMachinePauses.count, 1)
     }