# Use Supabase with iOS and SwiftUI

Learn how to create a Supabase project, add some sample data to your database, and query the data from an iOS app.

1. **Create a Supabase project**

Go to [database.new](https://database.new) and create a new Supabase project.

Alternatively, you can create a project using the Management API:

```bash
# First, get your access token from https://supabase.com/dashboard/account/tokens
export SUPABASE_ACCESS_TOKEN="your-access-token"

# List your organizations to get the organization ID
curl -H "Authorization: Bearer $SUPABASE_ACCESS_TOKEN" \
  https://api.supabase.com/v1/organizations

# Create a new project (replace <org-id> with your organization ID)
curl -X POST https://api.supabase.com/v1/projects \
  -H "Authorization: Bearer $SUPABASE_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "organization_id": "<org-id>",
    "name": "My Project",
    "region": "us-east-1",
    "db_pass": "<your-secure-password>"
  }'
```

When your project is up and running, go to the [**Table Editor**](/dashboard/project/_/editor) section of the Dashboard, create a new table and insert some data. Then in the [**Integrations > Data API**](/dashboard/project/_/integrations/data_api/settings) section of the Dashboard, expose the specific tables or functions you want to access. To automatically grant access for new tables and functions in `public`, enable **Default privileges for new entities**.

Alternatively, you can run the following snippet in your project's [SQL Editor](/dashboard/project/_/sql/new).

This creates an `instruments` table with some sample data, sets a secure baseline by setting only the privileges each Postgres role needs, and adds [Row Level Security (RLS)](/docs/guides/database/postgres/row-level-security) for enhanced security for database data by default.

```sql SQL_EDITOR
-- Create the table
create table instruments (
  id bigint primary key generated always as identity,
  name text not null
);

-- Insert sample data into the table
insert into instruments (name)
values
  ('violin'),
  ('viola'),
  ('cello');

-- Grant the privileges the role needs, which is read access
grant select on public.instruments to anon;

-- Enable row level security for the table
alter table instruments enable row level security;
```

Create an RLS policy to make the data in your table publicly readable:

```sql SQL_EDITOR
-- Create a policy to allow the anon role to read from the instruments table
create policy "public can read instruments"
on public.instruments
for select to anon
using (true);
```

2. **Create an iOS SwiftUI app with Xcode**

Open Xcode > New Project > iOS > App. You can skip this step if you already have a working app.

3. **Install the Supabase client library**

Add the [supabase-swift](https://github.com/supabase/supabase-swift) package to your app using the Swift Package Manager.

In Xcode, navigate to **File > Add Package Dependencies...** and enter the repository URL `https://github.com/supabase/supabase-swift` in the search bar. For detailed instructions, see Apple's [tutorial on adding package dependencies](https://developer.apple.com/documentation/xcode/adding-package-dependencies-to-your-app).

Make sure to add `Supabase` product package as a dependency to your application target.

4. **Initialize the Supabase client**

Create a new `Supabase.swift` file add a new Supabase instance using your project URL and publishable key:

```swift name=Supabase.swift
import Supabase

let supabase = SupabaseClient(
  supabaseURL: URL(string: "YOUR_SUPABASE_URL")!,
  supabaseKey: "YOUR_SUPABASE_PUBLISHABLE_KEY"
)
```

You can also get the Project URL and key from [the project's **Connect** dialog](/dashboard/project/\_?showConnect=true&connectTab={{ .tab }}&framework={{ .framework }}).

### Get API details

Now that you've created some database tables, you are ready to insert data using the auto-generated API.

To do this, you need to get the Project URL and key from [the project **Connect** dialog](/dashboard/project/\_?showConnect=true&connectTab={{ .tab }}&framework={{ .framework }}).

[Read the API keys docs](/docs/guides/getting-started/api-keys) for a full explanation of all key types and their uses.

Supabase is changing the way keys work to improve project security and developer experience. You can [read the full announcement](https://github.com/orgs/supabase/discussions/29260), but in the transition period, you can use both the current `anon` and `service_role` keys and the new publishable key with the form `sb_publishable_xxx` which will replace the older keys.

**The legacy keys will be deprecated shortly, so we strongly encourage switching to and using the new publishable and secret API keys**.

In most cases, you can get the correct key from [the Project's **Connect** dialog](/dashboard/project/\_?showConnect=true&connectTab={{ .tab }}&framework={{ .framework }}), but if you want a specific key, you can find all keys in [the API Keys section of a Project's Settings page](/dashboard/project/_/settings/api-keys/):

**For new keys**, open the **API Keys** tab, if you don't have a publishable key already, click **Create new API Keys**, and copy the value from the **Publishable key** section.

5. **Create a data model for instruments**

Create a decodable struct to deserialize the data from the database.

Add the following code to a new file named `Instrument.swift`.

```swift name=Instrument.swift
struct Instrument: Decodable, Identifiable {
  let id: Int
  let name: String
}
```

6. **Query data from the app**

Use a `task` to fetch the data from the database and display it using a `List`.

Replace the default `ContentView` with the following code.

```swift name=ContentView.swift
import SwiftUI

struct ContentView: View {

  @State var instruments: [Instrument] = []

  var body: some View {
    List(instruments) { instrument in
      Text(instrument.name)
    }
    .overlay {
      if instruments.isEmpty {
        ProgressView()
      }
    }
    .task {
      do {
        instruments = try await supabase.from("instruments").select().execute().value
      } catch {
        dump(error)
      }
    }
  }
}
```

7. **Start the app**

Run the app on a simulator or a physical device by hitting `Cmd + R` on Xcode.

## Setting up deep links

If you want to implement authentication features like magic links or OAuth, you need to set up deep links to redirect users back to your app. For instructions on configuring custom URL schemes for your iOS app, see the [deep linking guide](/docs/guides/auth/native-mobile-deep-linking?platform=swift).

## Next steps

- Learn how to build a complete user management app with authentication in the [Swift tutorial](/docs/guides/getting-started/tutorials/with-swift)
- Explore the [supabase-swift](https://github.com/supabase/supabase-swift) library on GitHub