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# NSSymbolBounceEffect

A type that applies a transitory scaling effect, or bounce, to the layers in a symbol-based image separately or as a whole.

```
@interface NSSymbolBounceEffect : NSSymbolEffect
```

## Overview

A bounce animation draws attention to a symbol by applying a brief scaling operation to the symbol’s layers. You can choose to scale the symbol up or down as it bounces.

```objc
// Add an effect in AppKit and UIKit.
// Bounce with a scale-up animation.
[self.imageView1 addSymbolEffect:NSSymbolBounceEffect.bounceUpEffect];

// Bounce three times with a scale-down animation.
NSSymbolEffectOptions *options = [NSSymbolEffectOptions optionsWithRepeatCount:3];
[self.imageView2 addSymbolEffect:NSSymbolBounceEffect.bounceDownEffect options:options];
```

## Topics

### Accessing symbol effects

[`bounceDownEffect`](/documentation/Symbols/NSSymbolBounceEffect/bounceDownEffect)

An effect that bounces the symbol downward.

[`bounceUpEffect`](/documentation/Symbols/NSSymbolBounceEffect/bounceUpEffect)

An effect that bounces the symbol upward.

[`effect`](/documentation/Symbols/NSSymbolBounceEffect/effect)

An animation that applies a transitory scaling effect, or bounce, to the layers in a symbol-based image separately or as a whole.

### Determining effect scope

[`effectWithByLayer`](/documentation/Symbols/NSSymbolBounceEffect/effectWithByLayer)

An effect that bounces each layer separately.

[`effectWithWholeSymbol`](/documentation/Symbols/NSSymbolBounceEffect/effectWithWholeSymbol)

An effect that bounces all layers simultaneously.


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