Use of Objective-C Class

Use of Objective-C Class

Example of the Objective-C tutorial:

//// Main. m // test // Created by liwei on 14-10-28. // Copyright (c) 2014 liwei. all rights reserved. // # import

 
  
// @ Interface description class and method @ interface Fraction: NSObject-(void) print;-(void) setn: (int) n;-(void) setd: (int) d; @ end // @ implementation is used to describe the data, that is, the data definition and implementation method @ implementation Fraction {int nn, dd;}-(void) print {NSLog (@ "this ratio score is: % I/% I", nn, dd);}-(void) setn :( int) n {nn = n ;} -(void) setd :( int) d {dd = d;} @ end // The main function is used to use the int main (int argc, const char * argv []) class. {@ autoreleasepool {Fraction * myFraction; myFraction = [Fraction alloc]; myFraction = [myFraction init]; [myFraction setn: 1]; [myFraction setd: 3]; [myFraction print];} return 0 ;}