Spinner

iOS

import { Spinner } from "@/components/ui/spinner"

export function SpinnerExample() {
  return (
    <Spinner />
  )
}

Spinner wraps the native ActivityIndicator in a square View. The indicator is scaled from its native small size to the size you pass, so it can match text and icon sizes. Its color is set through a class.

Installation

$ pnpm dlx @esuiss/uim@latest add spinner

Manual

Install the dependencies:

npx expo install cn

Copy the source into components/ui/spinner.tsx:

uniwind/components/ui/spinner.tsx

import { cn } from "cn"
import { ActivityIndicator, View } from "react-native"

const NATIVE_SIZE = 20

function Spinner({
  colorClassName = "accent-label-secondary",
  className,
  size = 16,
  accessibilityLabel = "Loading",
  ...props
}: Omit<React.ComponentProps<typeof ActivityIndicator>, "size"> & {
  size?: number
  colorClassName?: string
}) {
  return (

Update the import paths to match your project.

Install the dependencies:

npx expo install cn nativewind

Copy the source into components/ui/spinner.tsx:

nativewind/components/ui/spinner.tsx

import { cn } from "cn"
import { cssInterop } from "nativewind"
import { ActivityIndicator, View } from "react-native"

cssInterop(ActivityIndicator, {
  className: { target: "style", nativeStyleToProp: { color: true } },
})

const NATIVE_SIZE = 20

function Spinner({
  colorClassName = "text-label-secondary",
  className,
  size = 16,
  accessibilityLabel = "Loading",
  ...props

Update the import paths to match your project.

Copy the source into components/ui/spinner.tsx:

stylesheet/components/ui/spinner.tsx

import { ActivityIndicator, View } from "react-native"
import { useTheme } from "@/components/ui/theme"

const NATIVE_SIZE = 20

function Spinner({
  color,
  style,
  size = 16,
  accessibilityLabel = "Loading",
  ...props
}: Omit<React.ComponentProps<typeof ActivityIndicator>, "size"> & {
  size?: number
}) {
  const { colors } = useTheme()
  return (

Update the import paths to match your project.

Target iOS 17 or later.
Copy the theme files every view uses:

swift/Theme/Theme.swift

import SwiftUI
import UIKit

struct RGBA: Sendable {
  let red: CGFloat
  let green: CGFloat
  let blue: CGFloat
  let alpha: CGFloat

  init(_ hex: UInt32, _ alpha: CGFloat = 1) {
    red = CGFloat((hex >> 16) & 0xFF) / 255
    green = CGFloat((hex >> 8) & 0xFF) / 255
    blue = CGFloat(hex & 0xFF) / 255
    self.alpha = alpha
  }

swift/Theme/Tokens.swift

import SwiftUI

extension Color {
  public static let surface = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))
  public static let surfaceSecondary = Color.adaptive(light: .init(0xF5F5F7), dark: .init(0x161617))
  public static let surfaceTertiary = Color.adaptive(light: .init(0xE8E8ED), dark: .init(0x2C2C2E))
  public static let surfaceRaised = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x1D1D1F))
  public static let label = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let labelSecondary = Color.adaptive(light: .init(0x6E6E73), dark: .init(0xA1A1A6))
  public static let labelTertiary = Color.adaptive(light: .init(0x86868B), dark: .init(0x86868B))
  public static let labelQuaternary = Color.adaptive(light: .init(0xD2D2D7), dark: .init(0x424245))
  public static let control = Color.adaptive(light: .init(0x000000, 0.04), dark: .init(0xFFFFFF, 0.1))
  public static let controlPressed = Color.adaptive(light: .init(0x000000, 0.12), dark: .init(0xFFFFFF, 0.22))
  public static let controlSelected = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let controlDisabled = Color.adaptive(light: .init(0x000000, 0.03), dark: .init(0xFFFFFF, 0.05))
  public static let onControlSelected = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))

Copy the source:

swift/Components/Spinner.swift

import SwiftUI

public struct Spinner: View {
  public enum Size: CaseIterable, Sendable {
    case sm, `default`, lg, xl

    public var value: CGFloat {
      switch self {
      case .sm: 12
      case .default: 16
      case .lg: 24
      case .xl: 32
      }
    }
  }

Add the files to your app target.

Set minSdk to 24 or higher and add the dependencies:

build.gradle.kts

implementation(platform("androidx.compose:compose-bom:2026.09.00"))
implementation("androidx.compose.foundation:foundation")
implementation("androidx.compose.ui:ui")

Copy the theme files every view uses:

kotlin/theme/Theme.kt

package com.esuiss.ui.theme

import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.dropShadow
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.shadow.Shadow as DropShadow
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.style.LineHeightStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.DpOffset

kotlin/theme/Tokens.kt

package com.esuiss.ui.theme

import androidx.compose.runtime.Immutable
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

@Immutable
data class Colors(
    val surface: Color,
    val surfaceSecondary: Color,
    val surfaceTertiary: Color,
    val surfaceRaised: Color,
    val label: Color,
    val labelSecondary: Color,
    val labelTertiary: Color,
    val labelQuaternary: Color,

Copy the source and every file it uses:

kotlin/components/Spinner.kt

package com.esuiss.ui.components

import androidx.compose.animation.core.LinearEasing
import androidx.compose.animation.core.RepeatMode
import androidx.compose.animation.core.animateFloat
import androidx.compose.animation.core.infiniteRepeatable
import androidx.compose.animation.core.rememberInfiniteTransition
import androidx.compose.animation.core.tween
import androidx.compose.foundation.Canvas
import androidx.compose.foundation.layout.size
import androidx.compose.runtime.Composable
import androidx.compose.runtime.State
import androidx.compose.runtime.remember
import androidx.compose.runtime.mutableFloatStateOf
import androidx.compose.ui.Modifier
import androidx.compose.ui.geometry.CornerRadius

kotlin/components/Content.kt

package com.esuiss.ui.components

import androidx.compose.runtime.compositionLocalOf
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp

val LocalContentStyle = compositionLocalOf { TextStyle.Default }

val LocalContentColor = compositionLocalOf { Color.Unspecified }

val LocalIconSize = compositionLocalOf { 20.dp }

kotlin/components/FormSupport.kt

package com.esuiss.ui.components

import android.provider.Settings
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.text.selection.TextSelectionColors
import androidx.compose.runtime.Composable
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.drawWithContent
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size

Update the com.esuiss.ui package names to match your project.

Usage

import { Spinner } from "@/components/ui/spinner"

<Spinner />

Set size in points (default 16) and colorClassName with an accent-* class, such as accent-accent or accent-danger. Inside a button, use accent-on-accent on the default variant so the spinner matches the label.

Examples

Sizes

Spinners at 12, 16, 24 and 32 points.

iOS

import { View } from "react-native"
import { Spinner } from "@/components/ui/spinner"

export function SpinnerSizesExample() {
  return (
    <View className="flex-row items-center gap-6">
      <Spinner size={12} />
      <Spinner />
      <Spinner size={24} />
      <Spinner size={32} />
    </View>
  )
}

import EsuissUI
import SwiftUI

struct SpinnerSizesExample: View {
  var body: some View {
    HStack(spacing: 24) {
      Spinner(.sm)
      Spinner()
      Spinner(.lg)
      Spinner(.xl)
    }
    .foregroundStyle(Color.labelSecondary)
  }
}

import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.Spinner

@Composable
fun SpinnerRow(content: @Composable () -> Unit) {
    Row(horizontalArrangement = Arrangement.spacedBy(24.dp), verticalAlignment = Alignment.CenterVertically) {
        content()
    }
}

@Composable
fun SpinnerSizes() {
    SpinnerRow {
        Spinner(size = 12.dp)
        Spinner()
        Spinner(size = 24.dp)
        Spinner(size = 32.dp)
    }
}

Colors

Spinners in the label, accent and danger colors.

iOS

import { View } from "react-native"
import { Spinner } from "@/components/ui/spinner"

export function SpinnerColorsExample() {
  return (
    <View className="flex-row items-center gap-6">
      <Spinner size={24} colorClassName="accent-label" />
      <Spinner size={24} colorClassName="accent-accent" />
      <Spinner size={24} colorClassName="accent-danger" />
    </View>
  )
}

import EsuissUI
import SwiftUI

struct SpinnerColorsExample: View {
  var body: some View {
    HStack(spacing: 24) {
      Spinner(.lg).foregroundStyle(Color.label)
      Spinner(.lg).foregroundStyle(Color.accent)
      Spinner(.lg).foregroundStyle(Color.danger)
    }
  }
}

import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.Spinner
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun SpinnerRow(content: @Composable () -> Unit) {
    Row(horizontalArrangement = Arrangement.spacedBy(24.dp), verticalAlignment = Alignment.CenterVertically) {
        content()
    }
}

@Composable
fun SpinnerColors() {
    val colors = EsuissTheme.colors
    SpinnerRow {
        Spinner(size = 24.dp, color = colors.label)
        Spinner(size = 24.dp, color = colors.accent)
        Spinner(size = 24.dp, color = colors.danger)
    }
}

In button

Spinners inside disabled buttons next to a label.

iOS

Spinner (in button) on iOS in light mode

import { View } from "react-native"
import { Button } from "@/components/ui/button"
import { Spinner } from "@/components/ui/spinner"
import { Text } from "@/components/ui/text"

export function SpinnerInButtonExample() {
  return (
    <View className="items-start gap-3">
      <Button disabled>
        <Spinner colorClassName="accent-on-accent" />
        <Text>Saving</Text>
      </Button>
      <Button variant="secondary" disabled>
        <Spinner />
        <Text>Loading</Text>
      </Button>
    </View>
  )
}

import EsuissUI
import SwiftUI

struct SpinnerInButtonExample: View {
  var body: some View {
    VStack(alignment: .leading, spacing: 12) {
      Button {} label: {
        HStack(spacing: 6) {
          Spinner().foregroundStyle(Color.onAccent)
          Text("Saving")
        }
      }
      .buttonStyle(.variant())
      Button {} label: {
        HStack(spacing: 6) {
          Spinner().foregroundStyle(Color.labelSecondary)
          Text("Loading")
        }
      }
      .buttonStyle(.variant(.secondary))
    }
    .disabled(true)
  }
}

import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.runtime.Composable
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Spinner
import com.esuiss.ui.components.Text
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun SpinnerInButton() {
    Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
        Button(onClick = {}, enabled = false) {
            Spinner(color = EsuissTheme.colors.onAccent)
            Text("Saving")
        }
        Button(onClick = {}, variant = ButtonVariant.Secondary, enabled = false) {
            Spinner()
            Text("Loading")
        }
    }
}

API Reference

Spinner

ExtendsReact.ComponentProps<typeof ActivityIndicator>

PropTypeDefault

About: Width and height in points. Defaults to 16.
Type: number
Default: 16

About: Class that sets the indicator color. Defaults to accent-label-secondary.
Type: string
Default: "accent-label-secondary"

Accessibility

The wrapper has role="progressbar", is accessible, and sets busy: true in accessibilityState.
It is announced as "Loading" unless you pass another accessibilityLabel.

Notes

The default color uses the label-secondary token.
The look of the indicator comes from the platform's native activity indicator, so it differs between iOS and Android.