OC继承专题
FJEmployee.h
#import <Foundation/Foundation.h>
//objectC创建枚举类型;
typedef NS_ENUM(NSUInteger,FJEmployeeType ){
FJEmployeeTypeManager,
FJEmployeeTypeEngineer,
FJEmployeeTypeSalesman} ;
@interface FJEmployee : NSObject
/**这是一个父类，员工的共同属性姓名和工资*/
@property (nonatomic,copy) NSString *name;
@property (nonatomic,readonly) double salary;
/**隐藏多种员工子类型的细节，只暴露员工接口给用户调用*/
+ (instancetype) employeeWithType:(FJEmployeeType) typeName;
@end
FJEmployee.m
#import "FJEmployee.h"
#import "FJManager.h"
#import "FJEngineer.h"
#import "FJSaledman.h"
@implementation FJEmployee
//类簇（class - cluster）
//GoF设计模式：静态工厂方法模式
//GoF设计模式（23种设计模式）
//创建型模式：单例，工厂
//结构型模式：适配器，门面，装潢，桥梁
//行为型模式：观察者，代理
//单一职责，开闭原则，依赖倒转原则，里氏替换原则，接口隔离原则，合成聚合复用，迪米特原则
+ (instancetype)employeeWithType:(FJEmployeeType)typeName{
FJEmployee *employee = nil;
switch (typeName) {
case FJEmployeeTypeManager:
employee = [[FJManager alloc]init];
break;
case FJEmployeeTypeEngineer:
employee = [[FJEngineer alloc] init];
break;
case FJEmployeeTypeSalesman:
employee = [[FJSaledman alloc]init];
//employee = [FJSaledman new];new表示用默认的初始化方法，带参数的初始化方法就不可以使用new
break;
}
return employee;
}
FJManager.h
#import "FJEmployee.h"
//#import "FJEmployee.h"
@interface FJManager : FJEmployee
@end
FJManager.m
#import "FJManager.h"
/**部门经理的工资固定为10000*/
@implementation FJManager
- (double)salary{
return 10000;
}
@end
FJEngineer.h
#import "FJEmployee.h"
/**工程师根据工作时间计算工资*/
@interface FJEngineer : FJEmployee
@property (nonatomic,strong) NSNumber *workinghour;
@end
FJEngineer.m
#import "FJEngineer.h"
@implementation FJEngineer
/**假设每个小时200*/
- (double)salary{
return 200*_workinghour.doubleValue;
}
@end
FJSalsman.h
#import "FJEmployee.h"
@interface FJSaledman : FJEmployee
/**销售人员根据销售额提成*/
@property (nonatomic,strong) NSNumber *sales;
@end
FJSalaman.m
#import "FJSaledman.h"
@implementation FJSaledman
-(double)salary{
return 1500 + _sales.doubleValue*0.05;
}
@end
main.m
#import <Foundation/Foundation.h>
#import "FJManager.h"
#import "FJSaledman.h"
#import "FJEngineer.h"
int main(int argc, const char * argv[]) {
@autoreleasepool {
NSArray *names = @[@"luhan",@"fanjuan",@"qianxi"];
NSMutableArray *empArray = [NSMutableArray array];
for (NSString *name in names) {
FJEmployee *emp = [FJEmployee employeeWithType:arc4random() % 3];
emp.name = name;
[empArray addObject:name];
}
for (FJEmployee *emp in empArray) {
if ([emp isKindOfClass:[FJEngineer class]]) {
printf("请输入%s的工作时间:",emp.name.UTF8String);
int hour;
scanf("%d",&hour);
//通过选择器去执行对象的方法
[emp performSelector:@selector(setWorkinghour:) withObject:@(hour)];
}
else if([emp isKindOfClass:[FJSaledman class]]){
printf("请输入%s的销售额:\n",emp.name.UTF8String);
double sales;
scanf("%lf",&sales);
[emp performSelector:@selector(setSales:) withObject:@(sales)];
}
printf("%s本月的工资是$%lf\n",emp.name.UTF8String,emp.salary);
}
}
return 0;
}