objective_c

Objective-C

Sample

• Place #imports into the prefix header (ProjectName-Prefix.pch) only if used in many files.
• Place .xib files under Resources/Nibs and their associated view files in Classes/Views.
• Order #import statements alphabetically.
• Order @class directives alphabetically.
• Order @property modifiers: memory management, atomicity, writability.
• Leave out @property modifiers unless needed, nonatomic is the only one needed in most cases except connecting views with IB in which case weak may also be needed.
• Prefer @class to #import when referring to external classes in a public @interface.
• Prefer @property to declaring instance variables.
• Prefix class names with a 2 or 3 letter project acronym.
• Prefix string constants being used as keys with 'k'.
• Remove #import statements for Foundation and UIKit in new project templates.
• Separate methods by function using #pragma mark - <Section Name>
• Separate sections into subsections using #pragma mark <Subsection Name>
• Use @[arrayObject], @{@"key" : value}, @(YES or NO), and @5.0 literals.
• Use @interface ClassName () to declare private properties.
• Use lowerCamelCase for method names.
• Use NSAssert in methods that require the presence of certain arguments.
• Write methods using the happy path. Indent the exceptional cases. Keep the optimal case in the left-most column.
• Prefer enumerateObjectsUsingBlock: when looping through arrays.
• Always use braces with control and loop blocks unless it can easily fit on one line.
• Place opening brace for control and loop blocks on same line.
• Prefer NSInteger, CGFloat, and similar macros over int, float, and other base types.
• Prefer Auto Layout for view layouts and constraints.