iOS设计模式-模板

请客吃饭与模板模式

1. 张三李四王五，都实现了请客吃饭的流程，但具体实现是不一样的方法，比如有的用QQ，有的用手机
2. 联系朋友，预订酒店，点菜，虽然有差异，但本质上都是按照这三个流程进行，

模板模式特点

1. 过程殊途同归
2. 将共同行为/流程抽象成算法的骨架
3. 利用OO的多态，让子类继承重写

Cocoa 框架中用到的模板模式(Override)

CustomCell

@interface CustomCell : UITableViewCell

- (void)setupCell;
- (void)buildSubView;
@end
----------------------------------------
@implementation CustomCell

- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {

if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {

    [self setupCell];

    [self buildSubView];
}

return self;
}

- (void)setupCell {

}

- (void)buildSubView {

}

@end

ModelCell

@interface ModelCell : CustomCell

@end

@implementation ModelCell

- (void)setupCell {

// setup cell.
}

- (void)buildSubView {

// build subView.
}

@end

游戏从开始到结束的各个阶段详解

1. 各个阶段的分解
2. 将分解出来的阶段模板化

Game

@interface Game : NSObject
- (void)initGame;
- (void)pause;
- (void)save;
- (void)exitGame;
- (void)startPlay;
@end

@implementation Game

- (void)initGame {
}

- (void)pause {
}

- (void)save {
}

- (void)exitGame {
}

- (void)startPlay {
}
@end

Chess

@interface Chess : Game

@end

@implementation Chess

- (void)initGame {

NSLog(@"init chess game.");
}

- (void)pause {

NSLog(@"pasue chess game.");
}

- (void)save {

NSLog(@"save chess game.");
}

- (void)exitGame {

NSLog(@"exit chess game.");
}

- (void)startPlay {

NSLog(@"play chess game.");
}

@end

Football

@interface Football : Game

@end
@implementation Football

- (void)initGame {

NSLog(@"init football game.");
}

- (void)pause {

NSLog(@"pasue football game.");
}

- (void)save {

NSLog(@"save football game.");
}

- (void)exitGame {

NSLog(@"exit football game.");
}

- (void)startPlay {

NSLog(@"play football game.");
}

@end