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Would it be possible to use the camera to capture the speed of an object moving moving(100+ mph)? at close range?

We have a native iOS mobile fitness app. We would like to start a HKWorkoutSession on the Watch in order to get real-time access to the heart rate sensor. Our iOS app currently has HealthKit intergration and we have ask for permission to access heart rate.It seems there is conflicting answers out there on wether a native WatchOS app is required or not to get real-time access to the heart rate sensor? Can we just start a workout session on the watch and query to get realtime heart rate data?

We have a SpriteKit background node built in Objective-C. Our application builds the tiles(a transparent png image), loops the tiles and changes the background color based on the user's heart rate. There is also a optimise titles function but we found it does not have much of an impact if we disable. Here is a link to a GIF which shows the background function in action - http://gph.is/2auqNjWOur CPUs usage and Energy is being crushed by these two functions below (actBuildNode & addBackgroundTilesInit). Any advice or suggestions to optimize would be greatly appreciated. We know it's these two functions because if we disable them the CPU usage is decreased by 70% and GPU goes down to 2%. The goal is to simulate moving water in the background, which changes color based on user's heart rate zone.-(void)actBuildNode { [Helper logToServer:@"" withFunction:[NSString stringWithFormat:@"%s", __PRETTY_FUNCTION__] withLine:@(__LINE__)]; flSceneSteps = 0; flNumberSteps = 0; intStepAmount = 0; self.flStepFactor = 0; [self runAction:[SKAction colorizeWithColor:[Helper UIColorFromHex:0x577C80 alpha:1.0f] colorBlendFactor:1.0f duration:0.f]]; NSInteger intMWorkoutValue = [[CoreMachine sharedInstance].pfWorkoutType.valueType integerValue]; switch (intMWorkoutValue) { case iWorkoutTypesDistance: { flNumberSteps = [[CoreMachine sharedInstance].pfWorkoutType.value floatValue]; flSceneSteps = flNumberSteps / 50; intStepAmount = 50; self.size = CGSizeMake(rectWindow.size.width * flSceneSteps, rectWindow.size.height); } break; case iWorkoutTypesTimed: { flSceneSteps = [[CoreMachine sharedInstance].pfWorkoutType.value floatValue] / 60; flNumberSteps = flSceneSteps * 60; intStepAmount = 30; self.size = CGSizeMake(rectWindow.size.width * (flSceneSteps * 4 + 1), rectWindow.size.height); } break; case iWorkoutTypesCustom: { switch ([[CoreMachine sharedInstance].pfIntervalSegment.valueType integerValue]) { case iWorkoutSegmentTimed: { flSceneSteps = [[CoreMachine sharedInstance].pfIntervalSegment.value floatValue] / 60; flNumberSteps = flSceneSteps * 60; intStepAmount = 30; self.size = CGSizeMake(rectWindow.size.width * (flSceneSteps * 4 + 1), rectWindow.size.height); } break; case iWorkoutSegmentDistance: { flNumberSteps = [[CoreMachine sharedInstance].pfIntervalSegment.value floatValue]; flSceneSteps = flNumberSteps / 50; intStepAmount = 50; self.size = CGSizeMake(rectWindow.size.width * flSceneSteps, rectWindow.size.height); } break; default: break; } } break; case iWorkoutTypesJustRow: { flNumberSteps = 20000; flSceneSteps = flNumberSteps / 50; intStepAmount = 50; self.size = CGSizeMake(rectWindow.size.width * flSceneSteps, rectWindow.size.height); } break; default: { } break; } self.color = [UIColor blackColor]; self.scene.scaleMode = SKSceneScaleModeAspectFill; self.anchorPoint = CGPointMake(0, 0); self.position = CGPointMake(0, 0); [self runAction:[SKAction moveToX:0 duration:0] completion:^{}]; self.zPosition = 0; lastFlMoveX = 0; [self addBackgroundTilesInit]; [self addMeterMarkers]; } -(void)addBackgroundTilesInit { SKSpriteNode *backgroundA = (SKSpriteNode *)[self childNodeWithName:@"BackgroundA"]; if (backgroundA) { [backgroundA removeAllChildren]; [backgroundA removeAllActions]; [backgroundA removeFromParent]; backgroundA = nil; } SKSpriteNode *backgroundB = (SKSpriteNode *)[self childNodeWithName:@"BackgroundB"]; if (backgroundB) { [backgroundB removeAllChildren]; [backgroundB removeAllActions]; [backgroundB removeFromParent]; backgroundB = nil; } backgroundA = [[SKSpriteNode alloc] initWithColor:[Helper UIColorFromHex:0x577C80 alpha:1.0f] size:CGSizeMake(rectWindow.size.width * 4, 2 * rectWindow.size.height)]; backgroundA.name = @"BackgroundA"; backgroundB = [[SKSpriteNode alloc] initWithColor:[Helper UIColorFromHex:0x577C80 alpha:1.0f] size:CGSizeMake(rectWindow.size.width * 4, 2 * rectWindow.size.height)]; backgroundB.name = @"BackgroundB"; //SKSpriteNode *colorPanel = [[SKSpriteNode alloc] initWithColor:[Helper UIColorFromHex:0x1B4E58 alpha:1.0f] size:CGSizeMake(SCREEN_WIDTH, SCREEN_HEIGHT)]; //colorPanel.name = @"nodeColorPanel"; SKTexture *backgroundTextureA = [SKTexture textureWithCGImage:[UIImage imageNamed:@"GrayWaterImage-2"].CGImage]; SKTexture *backgroundTextureB = [SKTexture textureWithCGImage:[UIImage imageNamed:@"GrayWaterImage-2"].CGImage]; for (int i = 0; i < 3; i++) { //DLog(@"i:%i", i); intCurrentBackground = i; SKSpriteNode *nodeBackgroundTileA = [SKSpriteNode spriteNodeWithTexture:backgroundTextureA size:CGSizeMake(rectWindow.size.height, rectWindow.size.height)]; nodeBackgroundTileA.name = [NSString stringWithFormat:@"BackgroundA_%i", intCurrentBackground]; nodeBackgroundTileA.scene.scaleMode = SKSceneScaleModeAspectFill; nodeBackgroundTileA.anchorPoint = CGPointMake(0, 0); nodeBackgroundTileA.position = CGPointMake((i * rectWindow.size.height),0); nodeBackgroundTileA.zPosition = 1; nodeBackgroundTileA.alpha = 1.0f; SKSpriteNode *nodeBackgroundTileB = [SKSpriteNode spriteNodeWithTexture:backgroundTextureB size:CGSizeMake(rectWindow.size.height, rectWindow.size.height)]; nodeBackgroundTileB.name = [NSString stringWithFormat:@"BackgroundB_%i", intCurrentBackground]; nodeBackgroundTileB.scene.scaleMode = SKSceneScaleModeAspectFill; nodeBackgroundTileB.anchorPoint = CGPointMake(0, 0); nodeBackgroundTileB.position = CGPointMake((i * rectWindow.size.height),0); nodeBackgroundTileB.zPosition = 1; nodeBackgroundTileB.alpha = 1.0f; [backgroundA addChild:nodeBackgroundTileA]; [backgroundB addChild:nodeBackgroundTileB]; DLog(@"Add Background:%i, %@", i, NSStringFromCGPoint(backgroundA.position)); } SKAction *fadeIn = [SKAction fadeInWithDuration:2.0]; SKAction *fadeOut = [SKAction fadeOutWithDuration:2.0]; SKAction *wait = [SKAction waitForDuration:.6]; SKAction *sequence = [SKAction sequence:@[fadeIn, wait, fadeOut, wait]]; SKAction *repeat = [SKAction repeatActionForever:sequence]; [backgroundB runAction:repeat withKey:@"fade"]; [self addChild:backgroundA]; [self addChild:backgroundB]; }