Objective-c @property and @synthesize

In Objective-c, you use @property to identify the attribute (typically an instance variable). Use the @synthesize to identify the variables declared in the implementation file, allowing the system to automatically generate the Set method and get method.

In other words, @property and @synthesize are paired, allowing the system to automatically generate the Setup method and get methods.

Cases:

Test.h

[CPP]View Plaincopy

1. #import <Foundation/Foundation.h>
2. @interface Test:nsobject {
3. int IntX;
4. int inty;
5. }
6. @property int intx,inty;
7. -(void) print;
8. @end

Test.m

[CPP]View Plaincopy

1. #import "Test.h"
2. @implementation Test
3. @synthesize Intx,inty;
4. -(void) Print {
5. NSLog (@"intx+inty=%d", Intx+inty);
6. }
7. @end

Classtest.m

[CPP]View Plaincopy

2. #import <Foundation/Foundation.h>
4. #import "Test.h"
6. int main ( int argc, const char* argv[]) {
8. NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];
12. Test *test = [[Test alloc]init];
14. [Test setintx:1];
16. [Test setinty:1];
18. [Test print];
20. [Test release];
24. [Pool drain];
26. return 0;
28. }

Program Run Result:

• Test.inty = 1;

  It is equivalent to:

  [CPP] view plaincopy
  1. [Test setintx:1];
  2. [Test setinty:1];
  At the same time, need to pay special attention: Copyright Notice: This article for Bo Master original article, without Bo Master permission not reproduced.

Objective-c @property and @synthesize