day06-05-类簇

Objective-c

//  main.m
//  类簇
//
//  Created by Aaron on 15/7/8.
//  Copyright (c) 2015年 Aaron. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "Shape.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Shape *shape = [Shape createShapeWithType:kShapeYX];
        NSLog(@"%@",shape);
        [shape draw];
        NSString *str = [NSString stringWithContentsOfFile:@"/users/qianfeng/desktop/file1.txt" encoding:NSUTF8StringEncoding error:nil];
    }
    return 0;
}

#import <Foundation/Foundation.h>
typedef enum
{
    kShapeSJX,
    kShapeZFX,
    kShapeYX
}ShapeType;
@interface Shape : NSObject
{
    NSString *_name;
}
+(instancetype)createShapeWithType:(ShapeType)type;
-(void)draw;
@end

#import "Shape.h"
#import "ShapeSJX.h"
#import "ShapeYX.h"
#import "ShapeZFX.h"
@implementation Shape
+(instancetype)createShapeWithType:(ShapeType)type
{
    NSArray *array = @[[ShapeSJX class],[ShapeZFX class],[ShapeYX class]];
    Shape *s = [[array[type] alloc] init];
    return s;
}
-(NSString *)description
{
    return _name;
}
-(void)draw
{
    NSLog(@"....");
}
@end