Link
Embed
Share
Beginning
This slide
Copy link URL
Copy link URL
Copy iframe embed code
Copy iframe embed code
Copy javascript embed code
Copy javascript embed code
Share
Tweet
Share
Tweet
Slide 1
Slide 1 text
Objective-C Worst Practices VXXXXXXXXXXZ And How To Avoid Them
Slide 2
Slide 2 text
• Aesthetics • Shibboleths • Verbosity • Responsibility • Privilege • Logistics
Slide 3
Slide 3 text
Aesthetics
Slide 4
Slide 4 text
Formatting • Consistency • Consistency • Consistency
Slide 5
Slide 5 text
• Tabs vs. Spaces • 2 / 4 Space Tabs • Space after -, (, or ) • Newline after { or }
Slide 6
Slide 6 text
Does Not Matter
Slide 7
Slide 7 text
GitHub Objective-C Style Guide https://github.com/github/ objective-c-conventions
Slide 8
Slide 8 text
#Pragma #pragma mark - UIViewController
Slide 9
Slide 9 text
#pragma Sections • initializers • overridden subclass methods • protocols
Slide 10
Slide 10 text
typedef-ing Block Parameters
Slide 11
Slide 11 text
- (void)performBlock:(XXBlock)block
Slide 12
Slide 12 text
- (void)performBlock: (void (^)(NSError *error))block
Slide 13
Slide 13 text
Shibboleths
Slide 14
Slide 14 text
Gileadites Ephraimites ʃɪbəlεθ sɪbəlεθ
Slide 15
Slide 15 text
Deutsch English ɪx iʃ
Slide 16
Slide 16 text
Ruby Ruby Objective-C underscore_variable_name camelCaseVariableName def short(options = {}) - (void)longMethodWithParameter: andAnotherParameter: CAPITALIZED_CONSTANT kCamelCaseConstant Module::Class MNClass
Slide 17
Slide 17 text
Java Java AbstractLinkedHashMapFactorySingletonBean Objective-C NSAbstractLinkedHashMapFactorySingletonBean
Slide 18
Slide 18 text
Java Java AbstractLinkedHashMapFactorySingletonBean Objective-C NSDictionary
Slide 19
Slide 19 text
Using Strings Instead of Enumerated Constants
Slide 20
Slide 20 text
Ruby Ruby Objective-C :symbol kNSConstant
Slide 21
Slide 21 text
Bonus Points NS_ENUM NS_OPTIONS
Slide 22
Slide 22 text
Using Literal Strings Instead of Constants
Slide 23
Slide 23 text
@{@"error": @"Foo Bar Baz"}
Slide 24
Slide 24 text
NSString * const kErrorKey = @"error"; @{kErrorKey: @"Foo Bar Baz"}
Slide 25
Slide 25 text
Using Literal Strings Instead of Localized Strings
Slide 26
Slide 26 text
NSLocalizedString()
Slide 27
Slide 27 text
Not Using Foundation Built-in Types
Slide 28
Slide 28 text
• NSSet • NSCache • NSLocale • NSSortDescriptor • NSPredicate • NSURL • NSURLRequest • NSURLResponse • NSURLCredential Foundation Favorites
Slide 29
Slide 29 text
( N S < ❤
Slide 30
Slide 30 text
Responsibility
Slide 31
Slide 31 text
T M I oo uch nfo
Slide 32
Slide 32 text
X X X X Censored
Slide 33
Slide 33 text
Private Category @interface FooViewController () ... @end
Slide 34
Slide 34 text
Private Category @interface FVC ()
Slide 35
Slide 35 text
• NSOperationQueue • NSURLProtocol • NSPersistentStoreCoordinator
Slide 36
Slide 36 text
Mutable Properties X X X X Censored
Slide 37
Slide 37 text
Proxying Complex Internal Objects
Slide 38
Slide 38 text
cell.text = @"Guten Tag!";
Slide 39
Slide 39 text
cell.text = @"Guten Tag!"; cell.textColor = [...]; cell.font = [...];
Slide 40
Slide 40 text
UILabel "I got this"
Slide 41
Slide 41 text
cell.textLabel.text = @"Guten Tag!";
Slide 42
Slide 42 text
Privilege
Slide 43
Slide 43 text
No Classes should require insider knowledge to use
Slide 44
Slide 44 text
Delegates
Slide 45
Slide 45 text
Block Callbacks
Slide 46
Slide 46 text
Notifications
Slide 47
Slide 47 text
Logistics
Slide 48
Slide 48 text
No content
Slide 49
Slide 49 text
platform :ios, “5.0” pod “AFNetworking” pod “AFIncrementalStore”
Slide 50
Slide 50 text
MAINTAIN SANITY AND USE COCOAPODS
Slide 51
Slide 51 text
Open-Source Projects
Slide 52
Slide 52 text
Not Having README Screenshots Sample Project or and
Slide 53
Slide 53 text
?
Slide 54
Slide 54 text
Please, please, stop making Swiss Army Knife category Libraries
Slide 55
Slide 55 text
• NSArray -firstObject • NSString -URL • UIView -setLeft:/-setSize:/etc. • UIImage -scaledImage...
Slide 56
Slide 56 text
tl;dr
Slide 57
Slide 57 text
• Make your code sparkle • Follow Apple's conventions • Delegate responsibilities • Use CocoaPods