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4. Apollo iOS
Most popular GraphQL library for iOS.
Features:
- Type-safe Swift models
- Query generation
- Code generation
- Async/Await support
- WebSocket subscriptions
- Cache management
Installation
Swift Package Manager
File
→ Add Package Dependency
Package:
github.com/apollographql/apo…
5. Apollo Architecture
iOS App
↓
Apollo Client
↓
GraphQL Server
↓
Database
Apollo Client handles:
Queries
Mutations
Subscriptions
Caching
Network layer
6. Apollo Setup
Network Layer
import Apollo
final class Network {
static let shared = Network()
private(set) lazy var apollo = ApolloClient(
url: URL(string: "api.example.com/graphql")!
)
}
7. Writing GraphQL Queries
Create:
query GetUsers {
users {
id
name
email
}
}
Apollo generates:
GetUsersQuery
Automatically.
This is a huge advantage because:
- No manual Codable models
- Compile-time type safety
#iOS#Swift#GraphQL#ApolloIOS#SwiftUI#UIKit#MobileDevelopment#iOSDeveloper#SoftwareEngineering#Programming#Tech#Apple#AsyncAwait#API#Develop
3. Core Concepts
Query
Used to fetch data.
query GetUser {
user(id: 1) {
id
name
email
}
}
Equivalent to:
http
GET
Mutation
Used to create/update/delete data.
mutation CreateUser {
createUser(name: "Phoenix") {
id
name
}
}
Equivalent to:
http
POST
PUT
DELETE
Subscription
Used for real-time updates.
GraphQL
subscription {
messageAdded {
id
text
}
}
Use cases:
- Chat apps
- Live scores
- Stock market
- Notifications
Usually works through:
Plain text
WebSocket
#iOS#Swift#GraphQL#ApolloIOS#SwiftUI#UIKit#MobileDevelopment#iOSDeveloper#SoftwareEngineering#Programming#Tech#Apple#AsyncAwait#API#Developers
2. Why Use GraphQL in iOS?
Prevents Over-fetching —
REST:
Need -> name
Receive -> name email phone address
GraphQL:
Need -> name
Receive -> name
Prevents Under-fetching —
REST:
http
/users/1
/users/1/posts
/users/1/comments
Multiple API calls.
GraphQL:
query {
user(id:1){
name
posts{
title
}
comments{
text
}
}
}
Single request.
Better for Mobile Apps
Benefits:
- Less bandwidth
- Fewer network calls
- Faster screens
- Better battery efficiency
- Better performance on slow network
#iOS#Swift#GraphQL#ApolloIOS#SwiftUI#UIKit#MobileDevelopment#iOSDeveloper#SoftwareEngineering#Programming#Tech#Apple#AsyncAwait#API#Developers
GraphQL in iOS —
1. What is GraphQL?
GraphQL is a query language for APIs developed by Meta (Facebook).
Instead of receiving an entire response from the server like REST, the client requests only the fields it needs.
REST -
REQUEST
http
GET /users/1
RESPONSE:
JSON
{
"id": 1,
"name": "PSKV",
"email": "mail ID",
"phone": "number",
"address": "...",
"posts": [...]
}
Even if you need only:
name
email
you still receive everything.
GraphQL -
REQUEST:
query {
user(id: 1) {
name
email
}
}
RESPONSE:
JSON
{
"data": {
"user": {
"name": "PSKV",
"email": "mail ID"
}
}
}
Only requested fields are returned.
#iOS#Swift#GraphQL#ApolloIOS#SwiftUI#UIKit#MobileDevelopment#iOSDeveloper#SoftwareEngineering#Programming#Tech#Apple#AsyncAwait#API#Developers
🚀 Mobile App Developer
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#MobileDeveloper#iOSDeveloper#AndroidDeveloper
🚀 Mobile App Developer
Building innovative iOS or Android apps? Let's connect with developers creating great mobile experiences.
📩 olasunkantaiwo2021@zohomail.com
#MobileDeveloper#iOSDeveloper#AndroidDeveloper
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