Objective-C

Ubuntu under compilation objective-c1. Install the compilation environmentsudo Install build-essential gobjc gobjc++ gnustep gnustep-devel libgnustep-base-dev-y2, write Makefilepp:$ (s) gcc ' gnustep-config--objc-flags ' $ (s)-O app-lgnustep-

While the best objective-c coding platform So far comes from Apple, they are not just for Apple's platform. Objective-c has a long history on other platforms such as Linux, BSD and even windows. Depending on your needs, you will find some open

Build OBJECTIVE-C development environment under Windows environmentFor now, if you really want to use Xcode to run the OBJECTIVE-C program, then you can use the virtual machine to install Mac OS X or a black Apple (installed on the PC on the Apple

ARC mechanism and judging criteria Arc:auto Reference counting Automatic reference countis a compiler mechanism to add retain, release, Autorelease and other methods to our code during the compilation process.Forced to use after iOS7.0, so that

Definition and use of the Protocol What is an agreement?Can be used to declare a whole bunch of methods (cannot declare member variables)As long as a class follows this protocol, it is equivalent to having all the method declarations in this

beginsAs long as we use objective-c, we deal with method calls every day. We all know that the method of OBJECTIVE-C resolution is dynamic, but in the bottom of a method is how to find, how the method cache and how the operation is little known.This

the method that the class method uses to create the object is the factory method1. Non-reference factory methodcreate an object and give the property a default value. // no reference factory method implementation + (student*) student{ return

1.objective-c World of pointersOC has always been a human feeling more perverted language, why? Because each of its variables is pointer-type, many people almost forget the existence of that *.So often a=b the equal sign gives me the illusion that a

Http://www.tuicool.com/articles/ERvUbmR1. If the return value of the method is newly created, the first word of the method name should be the return value type, unless there is a modifier such as localizedstring;2. The noun representing the

MostBecause in iOS app development, considering the encapsulation of some public methods, we decided to use the notation of the singleton pattern. I wonder if the singleton pattern in Object-c is different from that in Java?So Antioch from the

The teacher asked for leave in the morning .... And then because there are a lot of people before the homework did not write out ... So arranging the writing industry .... Then I was paddling all morning ....Come back in the afternoon ... With the

Toolbar: ToolBarToolbar item: Bar Button Itemfixed adjustment of the adjustment button position: fixed Space Bar button Itemflexible adjustment of the adjustment button position: Flexible Space Bar button The toolbar toolbar is a property of the

———————————————————————————————————————————Single Object memory management(1) Wild hands① defines a pointer variable, but does not assign an initial value, it randomly points to something② The memory space pointed to by a pointer variable is freed

Before we analyzed the difference between #include and #import, #import不会引起交叉编译, #import determine that a file can only be imported once, so that there is no problem in recursive inclusion.So what's the difference between #import and @class?(1) In

Dot syntaxThe essence of point syntax is method invocationScope of member variables@public : The member variables of an object can be accessed directly from anywhere@private : can only be accessed directly in the object method of the current class

NSDate classNSDate is the class that represents the date in the foundation framework, which is used to get the current time, which includes: Month Day, time division, 0 timezone, and time zone. Note that it must be 0 time zone! Common

OC It provides a different way of--category, which can dynamically add new behaviors to existing classes (methods), which ensures the original design of smaller classes, and then gradually joins the extensions.You do not need to create a subclass

ARC (automatic reference counting) mechanismDetermine if the ARC mechanism Retain release autorelease cannot be used in the ARC mechanism Retaincount [Super Dealloc] cannot be used in the Dealloc method; Object release under Arc is

In OC, in addition to the while loop, there are additional for loops and do-while loops, which have different functions under different business logic. Can be compared with the C language and Java learning.(a) Code one:int main (int argc, const char

1. Add tags to your code#pragma mark-#pragma mark2. Dot syntaxPerson *p = [person new];The essence of point syntax or method invocationP.age = 10; [P setage:10];int a = P.age; [P age];3. Scope of member variables@public: The member variables of an