iOS App设计模式开发中策略模式的实现示例

#import"CashRebate.h"

@implementation CashRebate
@synthesize moneyRebate;

-(CashRebate*)MyInit:(double)moneyRebates{
    [self setMoneyRebate:moneyRebates];
    return self;
}
-(double)AcceptCash:(double)money{
    return moneyRebate*money;
}

@end

 

 

CashReturn类接口

 

复制代码

 

#import "CashSuper.h"

@interface CashReturn :CashSuper{
@private double moneyCondition;
@private double moneyReturn;
}
@property double moneyCondition;
@property double moneyReturn;
-(CashReturn*)MyInit:(double)moneyConditions And:(double)moneyReturns;
@end

 

 

CashReturn类实现

 

复制代码

 

#import "CashReturn.h"

@implementation CashReturn
@synthesize moneyReturn;
@synthesize moneyCondition;

-(CashReturn*)MyInit:(double)moneyConditions  And:(double)moneyReturns{
    [self setMoneyReturn:moneyReturns];
    [self setMoneyCondition:moneyConditions];
    return self;
}
-(double)AcceptCash:(double)money{
    double result;
    result = money;
    @try{
        if(money >=moneyCondition){
            result = money - (money /moneyCondition)*moneyReturn;
        }
    }
    @catch(NSException *exception) {
        NSLog(@"Oh!Man!!CashReturn has something wrong!");
    }
    @finally{
        return result;
    }
}