IOS 代码书写风格规范

void *ptr = &value + 10 * 3;

NewType a = (NewType)b;

for (int i = 0; i < 10; i++) {

    doCoolThings();

}

数组和字典类型的字面值的方括号两边各放置一个空格。

NSArray *theShit = @[ @1, @2, @3 ];

NSArray *theShit = @[

    @"Got some long string objects in here.",

    [AndSomeModelObjects too],

    @"Moar strings."

];

NSDictionary *keyedShit = @{

    @"this.key": @"corresponds to this value",

    @"otherKey": @"remoteData.payload",

    @"some": @"more",

    @"JSON": @"keys",

    @"and": @"stuff",

};

if (user.isHappy) {

//Do something

}

else {

//Do something else

}

if (!error) {

    return success;

}

if (!error)

    return success;

NSError *error;

if (![self trySomethingWithError:&error]) {

    // Handle Error

}

NSError *error;

[self trySomethingWithError:&error];

if (error) {

    // Handle Error

}

@interface CustomModelViewController : TTViewController <

  TTModelDelegate,

  TTURLRequestDelegate

> {

[object/class thing+condition];

[object/class thing+input:input];

[object/class thing+identifer:input];

realPath    = [path     stringByExpandingTildeInPath];

fullString  = [string   stringByAppendingString:@"Extra Text"];

object      = [array    objectAtIndex:3];

// 类方法

newString   = [NSString stringWithFormat:@"%f",1.5];

newArray    = [NSArray  arrayWithObject:newString];

recipients  = [email    recipientsSortedByLastName];

newEmail    = [CDCEmail emailWithSubjectLine:@"Extra Text"];

emails      = [mailbox  messagesReceivedAfterDate:yesterdayDate];

[object adjective+thing];

[object adjective+thing+condition];

[object adjective+thing+input:input];

capitalized = [name    capitalizedString];

rate        = [number  floatValue];

newString   = [string  decomposedStringWithCanonicalMapping];

subarray    = [array   subarrayWithRange:segment];

-sortInfo  // 是返回排序结果还是给info做排序

-refreshTimer  // 返回一个用于刷新的定时器还是刷新定时器

-update  // 更新什么，如何更新

-currentSortInfo      // "current" 清楚地修饰了名词SortInfo

-refreshDefaultTimer  // refresh是一个动词。

-updateMenuItemTitle  // 一个正在发生的动作

color = [NSColor colorWithCalibratedHue: 0.10

                               saturation: 0.82

                              brightness: 0.89

                                    alpha: 1.00];

//MyViewController.h文件

@interface MyViewController : UIViewController<

 UITalbeViewDataSource,

 UITableViewDelegate> {

 @private:

  UITableView *_myTableView;  // 私有实例变量

}

// 内部使用的属性

@property (nonatomic,strong) NSNumber *variableUsedInternally;

- (void)sortName;  // 只用于内部使用的方法

@end

//MyViewController.m文件使用类扩展

@interface MyViewController()<

 UITalbeViewDataSource,

 UITableViewDelegate> {

  UITableView *_myTableView;

// 外部需要访问的实例变量声明为属性，不需要外部访问的声明为实例变量

  NSNumber * variableUsedInternally;

}

// 从Xcode4.3开始，可以不写方法的前置声明，Interface Builder和Storyboard仍然可以找到方法的定义

@end

- (void)       setTitle:           (NSString *)   aTitle;

- (void)       setName:            (NSString *)   newName;

- (id)         keyForOption:       (CDCOption *)  anOption

- (NSArray *)  emailsForMailbox:   (CDCMailbox *) theMailbox;

- (CDCEmail *) emailForRecipients: (NSArray *)    theRecipients;

for (i = 0; i < count; i++) {

    oneObject = [allObjects objectAtIndex: i];

    NSLog (@"oneObject: %@", oneObject);

}

NSEnumerator *e = [allObjects objectEnumerator];

id item;

while (item = [e nextObject])

      NSLog (@"item: %@", item);

@interface RNCSection: NSObject

@property (nonatomic) NSString *headline;

@end

@interface RNCSection : NSObject {

    NSString *headline;

}

@interface RNCSection : NSObject {

    NSString *headline;

}

@property (nonatomic) NSString *headline;

@end

@interface RNCSection: NSObject

@property (nonatomic) NSString *headline;

@end

NSString       *accountName;

NSMutableArray *mailboxes;

NSArray        *defaultHeaders;

BOOL             userInputWasUpdated;

NSString        *accountNameString;

NSMutableArray *mailboxArray;

NSArray        *defaultHeadersArray;

BOOL             userInputWasUpdatedBOOL;

NSImage               *previewPaneImage; 

NSProgressIndicator  *uploadIndicator; 

NSFontManager        *fontManager;       // 基于类名命名

NSDictionary * keyedAccountNames;

NSDictionary * messageDictionary;

NSIndexSet   * selectedMailboxesIndexSet;

/**

 * The maximum size of a download that is allowed.

 *

 * If a response reports a content length greater than the max * will be cancelled. This is helpful for preventing excessive memory usage.

 * Setting this to zero will allow all downloads regardless of size.

 *

 * @default 150000 bytes

 */

@property (nonatomic) NSUInteger maxContentLength;

- (instancetype)init {

    self = [super init]; // or call the designated initalizer

    if (self) {

        // Custom initialization

    }

    return self;

}

NSArray *names = @[@"Brian", @"Matt", @"Chris", @"Alex", @"Steve", @"Paul"];

NSDictionary *productManagers = @{@"iPhone" : @"Kate", @"iPad" : @"Kamal", @"Mobile Web" : @"Bill"};

NSNumber *shouldUseLiterals = @YES;

NSNumber *buildingZIPCode = @10018;

NSArray *names = [NSArray arrayWithObjects:@"Brian", @"Matt", @"Chris", @"Alex", @"Steve", @"Paul", nil];

NSDictionary *productManagers = [NSDictionary dictionaryWithObjectsAndKeys: @"Kate", @"iPhone", @"Kamal", @"iPad", @"Bill", @"Mobile Web", nil];

NSNumber *shouldUseLiterals = [NSNumber numberWithBool:YES];

NSNumber *buildingZIPCode = [NSNumber numberWithInteger:10018];

CGRect frame = self.view.frame;

CGFloat x = CGRectGetMinX(frame);

CGFloat y = CGRectGetMinY(frame);

CGFloat width = CGRectGetWidth(frame);

CGFloat height = CGRectGetHeight(frame);

CGRect frame = self.view.frame;

CGFloat x = frame.origin.x;

CGFloat y = frame.origin.y;

CGFloat width = frame.size.width;

CGFloat height = frame.size.height;

static NSString * const RNCAboutViewControllerCompanyName = @"The New York Times Company";

static const CGFloat RNCImageThumbnailHeight = 50.0;

#define CompanyName @"The New York Times Company"

#define thumbnailHeight 2

#ifndef NS_ENUM

#define NS_ENUM(_type, _name) enum _name : _type _name; enum _name : _type

#endif

typedef NS_ENUM(NSInteger, RNCAdRequestState) {

    RNCAdRequestStateInactive,

    RNCAdRequestStateLoading

};

if (!someObject) {

}

if (someObject == nil) {

}

if (isAwesome)

if (![someObject boolValue])

if ([someObject boolValue] == NO)

if (isAwesome == YES) // Never do this.

+ (instancetype)sharedInstance {

   static id sharedInstance = nil;

   static dispatch_once_t onceToken;

   dispatch_once(&onceToken, ^{

      sharedInstance = [[self alloc] init];

   });

   return sharedInstance;

}