//
// main.m
// OC7类
//
// Created by Zoujie on 15/8/23.
// Copyright (c) 2015年 Zoujie. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "Fraction.h"//导入头文件
#import "Complex.h"
#define Choose 0
int main(int argc, const char * argv[]) {
@autoreleasepool {
// insert code here...
NSLog(@"Hello, World!");
Fraction *myFraction = [Fraction new];
if (Choose)
{
// [myFraction setNumberator1:11];
myFraction.denominator1 = 11;
// [myFraction setDenominator1:3];
myFraction.numberator1 = 3;
}
else
{
[myFraction setNumberator1:1 Denominator:7];
}
NSLog(@"The value of myFraction");
[myFraction print];
NSLog(@"The value of myFranction:%i/%i",myFraction.numberator1,myFraction.denominator1);
// add 传入对象参数
Fraction *afraction = [Fraction new];
Fraction *bfraction = [Fraction new];
[afraction setNumberator1:1 Denominator:4];
[bfraction setNumberator1:1 Denominator:2];
[afraction print];
NSLog(@"+");
[bfraction print];
NSLog(@"=");
//
// [afraction add:bfraction];
// [afraction print];
//
//// reduce 分数相约到最简形式
// [afraction reduce];
// [afraction print];
//
// 在方法中分配和返回对象
Fraction *resultFraction;
resultFraction = [afraction newAdd:bfraction];
[resultFraction print];
Fraction *subRusult = [bfraction subtract:afraction];
[subRusult print];
// 多态 不同类使用相同方法
Fraction *f1 = [Fraction new];
Fraction *f2 = [Fraction new];
Fraction *fracResult;
Complex *c1 = [Complex new];
Complex *c2 = [Complex new];
Complex *complexResult;
// [f1 setTo:1 over:10];
[f1 setNumberator1:1 Denominator:10];
[f2 setNumberator1:2 Denominator:15];
[c1 setReal:18.0 andImaginary:2.5];
[c2 setReal:-5.0 andImaginary:3.2];
[c1 print]; NSLog(@" +");[c2 print];
NSLog(@"------------");
complexResult = [c1 add:c2];
// [complexResult reduce];
[complexResult print];
NSLog(@"\n");
// 将两个分数相加的显示
[f1 print];NSLog(@" +");[f2 print];
NSLog(@"----");
fracResult = [f1 newAdd:f2];
[fracResult print];
// id 可以用来存储属于任何类的对象
id dataValue;
NSLog(@"---------------id类型");
dataValue = f1;
[dataValue print];
dataValue = c1;
[dataValue print];
//
// self.dataValue; //id变量无法使用点运算符
// 处理动态类型的方法
if ([dataValue isKindOfClass:[Complex class]])//对象是不是Complex或其子类的成员，继承层次关系
{
NSLog(@"dataValue ‘s SuperClass is %@",[dataValue class]);
};
if ([dataValue isMemberOfClass:[Complex class]]){};//对象是不是Complex的成员,直接成员关系
if ([f1 respondsToSelector:@selector(setReal:andImaginary:)]){};//对象是否能够响应selector所指定的方法
if ([dataValue instancesRespondToSelector:@selector(setReal:andImaginary:)]){};//指定的类实例是否能响应selector
if ([dataValue isSubclassOfClass:[Complex class]]){};//对象是否是指定类的子类
[dataValue performSelector:@selector(setValue:forKey:)];//应用selector指定的方法
[dataValue performSelector:@selector(setNumberator1:Denominator:) withObject:f1];//使用selector指定的方法，传递参数
[dataValue performSelector:@selector(setNumberator1:Denominator:) withObject:f1 withObject:f2];
//使用@try处理异常
Fraction *f = [Fraction new];
// [f noSuchMethod];
NSLog(@"Execution continues");
@try {
// [f setReal:18.0 andImaginary:2.5];
}
@catch (NSException *exception) {
NSLog(@"Caught %@%@",[exception name],[exception reason]);
}
@finally {
NSLog(@"Execution continues");
}
}
return 0;
}
// // Fraction.h // OC7类 // // Created by Zoujie on 15/8/23. // Copyright (c) 2015年 Zoujie. All rights reserved. // #import <Foundation/Foundation.h> //接口文件 @interface Fraction : NSObject #pragma mark - 属性 自动生成 Setter && Get @property int numberator1; @property int denominator1; #pragma mark - Setter && Get //-(void)setNumerator:(int)n; //-(void)setDenominator:(int)d; //-(int)numerator; //-(int)denominator; -(double) convertToNum; -(void)print; /** * 多参数函数 */ -(void)setNumberator1:(int) n Denominator:(int)d; /** * add */ -(void) add:(Fraction *)f; /** * 相约数 */ -(void) reduce; /** * 记数 */ -(int)showpage; /** * new add */ -(Fraction *) newAdd:(Fraction *)f; /** * 减去消息接受着的参数 */ -(Fraction *) subtract :(Fraction *)f; /** * 乘 */ -(Fraction *) multiply :(Fraction *) f; /** * 除 */ -(Fraction *) divide :(Fraction *)f; @end
//
// Fraction.m
// OC7类
//
// Created by Zoujie on 15/8/23.
// Copyright (c) 2015年 Zoujie. All rights reserved.
//
#import "Fraction.h"//双引号实用于本地文件（自己创建的文件），而不是系统文件
//实现文件 实现部分包含的私有信息
/**
* static 关键字 局部静态变量 记录所有对象调用函数的次数 局部变量 只记录每个对象自己调用函数的次数
*/
static int hitCount = 0;//调用次数
@implementation Fraction
//{
// int numberator;
// int denominator;
//}
/**
* 如果省略@synthesize指令，那么编译器会自动分别命名底层的实例变量_numberator1,_denominator1.
*/
@synthesize numberator1,denominator1;
//-(void) setNumerator:(int)n
//{
// numberator = n;
//}
//
//-(void) setDenominator:(int)d
//{
// denominator = d;
//}
//********setter getter的参数名 不要跟 实例名称 相同 *********
-(void)setNumberator:(int)numberator
{
numberator1 = numberator;
}
-(void) setDenominator:(int)denominator
{
denominator1 = denominator;
}
//-(void) setDenominator:(int)denominator //自动生成Setter
//{
// denominator = denominator;
//}
-(int)numerator
{
return numberator1;
}
-(int)denominator
{
return denominator1;
}
-(void)print
{
NSLog(@"%i/%i",numberator1,denominator1);
}
-(double)convertToNum
{
if (denominator1 != 0)
{
return (double) numberator1 / denominator1;
}
else
{
return NAN;
}
}
-(void)setNumberator1:(int)n Denominator:(int)d
{
denominator1 = d;
numberator1 = n;
}
-(void) add:(Fraction *)f
{
numberator1 = numberator1 * f.denominator1 +denominator1 *f.numberator1;
denominator1 = denominator1 * f.denominator1;
// self 关键字 当前方法的接受着
[self reduce];
}
/*
* new add
*/
-(Fraction *) newAdd:(Fraction *)f
{
Fraction *result = [Fraction new];
result.numberator1 = numberator1 * f.denominator1 + denominator1 * f.numberator1;
result.denominator1 = denominator1 * f.denominator1;
[result reduce];
return result;
}
/**
* sub
*/
-(Fraction *) subtract:(Fraction *)f
{
Fraction *result = [Fraction new];
result.numberator1 = numberator1 * f.denominator1 - denominator1 * f.numberator1;
result.denominator1 = denominator1 * f.denominator1;
[result reduce];
return result;
}
-(void) reduce
{
//局部变量
int u = numberator1;
int v = denominator1;
int temp;
while (v != 0) {
temp = u % v;
u = v ;
v = temp ;
}
numberator1 /= u;
denominator1 /= u;
}
-(int)showpage
{
int hitCount = 0;
hitCount ++;
return hitCount;
}
@end
// // Complex.h // OC7类 // // Created by Zoujie on 15/8/30. // Copyright (c) 2015年 Zoujie. All rights reserved. // /** * 多态，动态类型，动态绑定 * 使不同的类共享相同的方法名称的能力称为多态 */ #import <Foundation/Foundation.h> @interface Complex : NSObject @property double real,imaginary; -(void)print; -(void)setReal:(double)a andImaginary:(double)b; -(Complex *) add:(Complex *)f; @end
//
// Complex.m
// OC7类
//
// Created by Zoujie on 15/8/30.
// Copyright (c) 2015年 Zoujie. All rights reserved.
//
#import "Complex.h"
@implementation Complex
@synthesize real,imaginary;
-(void)print
{
NSLog(@"%g + %gi",real,imaginary);
}
-(void) setReal:(double)a andImaginary:(double)b
{
real = a ;
imaginary = b;
}
-(Complex *)add:(Complex *)f
{
Complex *result = [[Complex alloc]init];
result.real = f.real+real;
result.imaginary = f.imaginary + imaginary;
return result;
}
@end
原文：http://my.oschina.net/u/2319073/blog/499302