学步园

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