collision.md

pinImageView Collision effect and Collision Callbacks

SwiftFortuneWheel can simulate the collision effect for pinImageView when the edge or the center of a slice moves during the rotation.

pinImageView Collision effect example

@IBOutlet weak var fortuneWheel: SwiftFortuneWheel!
// after SwiftFortuneWheel init and configuration…

// Creates the CollisionEffect for pinImageView
fortuneWheel.pinImageViewCollisionEffect = CollisionEffect(force: 8, angle: 20)
            
// Turn on the edge collision detection
// One of the collision detection should be on in order to simulate the collision effect
fortuneWheel.edgeCollisionDetectionOn = true

For more information, see example projects -> VariousWheelSimpleViewController

pinImageView Collision effect is not available on macOS

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You can use the collision callback and implement your own effect:

Example of use callback for Edge Collision

@IBOutlet weak var fortuneWheel: SwiftFortuneWheel!
// after SwiftFortuneWheel init and configuration…

// edge collision callback with progress, if rotation is continuous, progress is equal to nil
fortuneWheel.onEdgeCollision = { progress in
       print("edge collision progress: \(String(describing: progress))")
}

// turn on the edge collision detection
fortuneWheel.edgeCollisionDetectionOn = true

Example of use callback for Center Collision

@IBOutlet weak var fortuneWheel: SwiftFortuneWheel!
// after SwiftFortuneWheel init and configuration…

// center collision callback with progress, if rotation is continuous, progress is equal to nil
fortuneWheel.onCenterCollision = { progress in
       print("center collision progress: \(String(describing: progress))")
}

// turn on the center collision detection
fortuneWheel.centerCollisionDetectionOn = true

For more information, see example projects