General rules

Introduction
Architecture
Ruby on Rails Architecture
Node.js Architecture
Front-end Architecture
iOS Architecture
Android Architecture
React Native Architecture
Django Architecture
Real-Time Architecture
Design Principles
Design Patterns
Refactoring
Code Style
Ruby Code Style
Python Code Style
JavaScript Code Style
SCSS Code Style
iOS Code Style
Testing
Ruby on Rails Testing
Django Testing
Node.js Testing
React and React Native Testing
iOS Testing
Manual Testing
Managing Dependencies
Ruby Dependencies
Python Dependencies
JavaScript Dependencies
iOS Dependencies
Android Dependencies
Data Layer
API
Internationalization
Security
Technologies Research
UI Design
Node.js Libraries
Team Roles
Systems Engineer Role
Lead Developer Role
Developer Role
Tester Role
Client Developer Communication
Error tracking

Use Swift.
IBOutlets and IBActions are in defined in the top of a view controller.
Use extensions when implement protocol methods to group related code.

Linter

We use swiftlint tool for linting on every development build and for CI builds.
Adhere to all rules by default. Rules can be disabled or tweaked if all team members agree. Our .swiflint.yml config:

excluded:
  - Pods
  - fastlane

disabled_rules:
  - opening_brace # When method definition is more than two lines long opening brace is on new line

line_length: 125

variable_name:
  excluded: # add following names to be excluded from variable length rule
    - id

type_name:
  max_length:
    warning: 50 # Test double class names tend to be long

reporter: checkstyle