Implementation code about the IOS classification (category)

Its essence is the expansion of a class, there are two ways to extend the class:

(1) by inheritance (often used)

(2) by category

A known class name

Its header file Name.h

#import <Foundation/Foundation.h>

@interface Name:nsobject

@property (strong,nonatomic) nsstring* nameStr;

-(Name *) init: (nsstring*) namestring;

-(void) namevalue;

@end

its implementation file NAME.M

#import "Name.h"

@implementation Name

-(Name *) init: (nsstring*) namestring

{

Name * name = [name new];

Name.namestr = namestring;

return name;

}

-(void) namevalue

{

NSLog (@ "----%@--", SELF.NAMESTR);

}

@end

Create a new header file name+change.h is used to declare the method that it wants to expand

Source:

#import "Name.h"

@interface Name (change)

-(void) Addnameid: (NSString *) str;

@end

Create a new implementation file NAME+CHANGE.M a way to implement your own expansion.

#import <Foundation/Foundation.h>

#import "Name+change.h"

#import "Name.h"

@implementation Name (change)

-(void) Addnameid: (NSString *) str

{

NSLog (@ "---%@--%@--", self.namestr,str);

}

@end

Its test file Selection command line

Main.m

#import <Foundation/Foundation.h>

#import "Name+change.h"

int main (int argc, const char * argv[]) {

@autoreleasepool {

Name * name1 = [[Name alloc] init:@ "Wangfei"];

[Name1 Namevalue];

[Name1 addnameid:@ "898989"];

}

return 0;

}

Its test results:

2015-07-11 16:34:53.051 category[1462:60100]----wangfei--

2015-07-11 16:34:53.053 category[1462:60100]---wangfei--898989--

Program ended with exit code:0

Implementation code about the IOS classification (category)