cache missing

# iOS

mvc

# Xcode

Cheat-sheet for Xcode

Command + 0 => Left Panel
Command + Option + 0 => Right Panel
Command + R => Run Application
Command + 1, 2, .. => Navigate in Left Panel
Command + Option + 1, 2, .. => Navigate in Right Panel
Command + Shift + y => Debugger
Command + Option + Enter => Open Second Editor
Command + Enter => Close Second Editor
Command + Shift + o => Open file with filename
XCode -> Preferences -> Navigation -> Select ‘Uses Focused Editor’ => Open files in primary as well as second editor
// TODO and MARK comment prefix to enlist tasks and marks under navigation bar
Command + ‘/’ => Comment and uncomment
Control + I => Indents the code

# Objective-C

基础教程 (opens new window)

指令 含义 例子
@"chars" 实现常量 NSSTRING 字符串对象 NSString *url =@"http://www.kochan-wood.com (opens new window)"
@class c1,c2,... 将c1,c2...声明为类 @class Point,Rectangle;
@defs(class) 为class返回一个结构变量的列表 struct Fract
{ @defs(Fraction);}
*fractPtr;
fractPtr = (struct Fract *)[[Fraction alloc] init]
@dynamic names 用于names的存取器方法，可动态提供 @dynamic drawRect;
@encode(type) 将字符串编码类型为type类型 @encode(int*)
@end 结束接口部分，实现部分或协议部分 @end
@implementation 开始一个实现部分 @implementation Fraction
@interface 开始接口部分 @interface Fraction:
Object<Copying>
@private 定义一个或者多个实例变量的作用域
@protected 定义一个或者多个实例变量的作用域
@public 定义一个或者多个实例变量的作用域
@property(list)names 为names声明 list 中的属性 property(retain,nonatomic)NSSTRING *name;
@protocol(protocol) 指定protocol 创建一个Protocol对象 @protocol(Copyng){...}if ([myObj onformsTo:(protocol)])
@protocol name 开始name的协议定义 @protocol Copying
selector(method) 指定method的SEL(选择)对象 if([myObj respondsTo:@selector(allocF)]){...}
@synchronized(object) 通过单线程开始一个块的执行,Object已知是一个mutext或semaphore
@synthesize names 为names生成存取器方法，如果未提供的话 @synthesize name,email
@try
@catch(exceotion)
@finally
@throw

函数定义

- (return_type) method_name:( argumentType1 )argumentName1
joiningArgument2:( argumentType2 )argumentName2 ...
joiningArgumentn:( argumentTypen )argumentNamen {
   body of the function
}
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# lldb

调用函数

call [[NSProcessInfo processInfo] systemUptime]

print object
po object_a

# swift

struct are value type and class are reference type

argument labels

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