Objective-C

Copyright notice: This article for Bo Master original article, without Bo Master permission not reproduced. 0. Roles required in this ORMIn this ORM, there are at least so many role entities, based on the expected needs and considerations that are

Copyright notice: This article for Bo Master original article, without Bo Master permission not reproduced. The basic requirements of this ORM are illustrated by a common example of database relationships. class, Student This pair of tables, the

This article is from the long458 column, linked to http://blog.csdn.net/long458/article/details/41981273In general, there are several ways to sort the array commonly used in OC:

02. First OC Language classIn the Java language, creating a class requires only one file, whereas in the OC language, creating a class requires two files. m files and. h files.The. h file is a declaration class used to declare member variables and

immutable string Manipulation :1.initWithFormat:. The initialization operation, where the effect of a direct assignment is the same as the method, for example:1 nsstring *string1 = [[NSString alloc] Initwithformat:@ "iOS"]; 2 @" IOS ";However, it is

Take advantage of the recent relatively busy, you can again study the source code of OBJECTIVE-C, by the way to comb the idea, willing to have a greater harvest.Objective-c is an object-oriented programming language. Its object model was created

Category categories Relatedcategory是OC的特有的语法Declaration of classification@interface ClassName (CategoryName)NewMethod; //在类别中添加方法 //不允许在类别中添加变量@end ClassName: Which class extension method needs to be given CategoryName: Name of

Self.window = [[UIWindow alloc] Initwithframe:[uiscreen mainscreen].bounds];Self.window.backgroundColor = [Uicolor Whitecolor];Uitabbarcontroller *maintabbar = [[Uitabbarcontroller alloc] init];UIView *backview = [[UIView alloc]

1 //Dictionary: (keyword value)2 //Nsarray *array = [Nsarray array];//Empty Array3 //nsdictionary *dictionary = [nsdictionary dictionary];//Empty Dictionary4Nsdictionary *my = [Nsdictionary

First, what is the proxy mode?Proxy mode is a kind of design pattern that is often encountered in OC, what is called proxy mode?As an example:There is a baby, he himself will not eat and bathe and so on some things, baby mother to work and very busy,

Singleton mode iOS development may be used in one of the most commonly used patterns. But because OC language features itself, want to write a correct singleton mode is more cumbersome, iOS singleton mode design ideas.Please refer to this article

What is a timestamp?time Stamp ( timestamp ), which is typically a sequence of characters. Uniquely identifies a moment in time. Digital Timestamp technology is A variant application of digital signature technology. thinking: Simply speaking is

.. Or a sticky class note.Webview+image animation+Timer//uibarbutton Uibarbuttonitem*bar =[[Uibarbuttonitem alloc] Initwithbarbuttonsystemitem:uibarbuttonsystemitemsearch target:self action: @selector ( Search:)];

Official server#define Api_domain @ "www.online.com"Test server#define DOMAINXX @ "192.168.0.10"#define API_SYSTEM @ "/http" [email protected] "/system/"#define API_USER @ "/http" [email protected] "/user/"API_SYSTEM macro expands to: @ "/http" @

Use of random numbers in Objective-c (3 types: Arc4random (), Random (), ccrandom_0_1 ())1, the use of random numbers 1), arc4random () more precise do not need to generate the seed immediatelyHow to use:The code for obtaining an integer between 0

make a simple nine Gongge:The source code is as follows:1 #import "ViewController.h"2 3 @interfaceViewcontroller ()4 5 @end6 7 @implementationViewcontroller8 9- (void) Viewdidload {Ten [Super Viewdidload]; One A //Create a nine grid -Nsinteger

———————————————————————————————————————————Class method① class Method:+ The beginning of the method (defined as the process form and the object method, just the + start, which is the only difference)The invocation of the class method:[Class name

With the data type of int in objective-c, why use a numeric object NSNumber? This is because many classes, such as Nsarray, require the use of objects, while int is not an object.NSNumber are numeric objects, and we can use NSNumber objects to

When Apple released Xcode7, it not only upgraded the SWIFT programming language to version 2.0, but also made many improvements to objective-c, including the introduction of __nonnull/__nullable. Among them, for the OBJECTIVE-C programming language

In object-oriented languages, OBJECTIVE-C's handy initialization function can be understood as a constructor with parameters, such as java,c++, but somewhat different ...For example, use the student class as an example　　First is the Student.h