函数式编程/链式编程思想

传统的函数调用方式

    Fouction *aFouction = [[Fouction alloc]init];
    [aFouction dosomething];
    [aFouction working];

Fouction.h

/**
 传统写法
 */
-(void)dosomething;
-(void)working;

Fouction.m

-(void)dosomething{
    NSLog(@"dosomething ");
}
-(void)working{
    NSLog(@"working ");
}

链式编程调用

Fouction *aFouction = [[Fouction alloc]init];
[[[aFouction dosomething2] working2] dosomething2];

Fouction.h

/**
 链式编程方法
 @return 返回当前对象
 */
-(Fouction *)dosomething2;
-(Fouction *)working2;

Fouction.m

-(Fouction *)dosomething2{
    
    //执行操作办法
    NSLog(@"dosomething ");
    return  self;
}

-(Fouction *)working2{
    
    //执行操作办法
    NSLog(@"working");
    return  self;
}

函数式编程调用

  Fouction *aFouction = [[Fouction alloc]init];
  aFouction.dosomething4(@"工作").working4(@"休息");

Fouction.h

/**
 函数式编程 无参数
 */

-(Fouction *(^)(void))dosomething3;
-(Fouction *(^)(void))working3;

/**
  函数式编程  有参数
 */
-(Fouction *(^)(NSString *str))dosomething4;
-(Fouction *(^)(NSString * str))working4;

Fouction.m

-(Fouction *(^)(void))dosomething3{
    Fouction *(^runBlock)(void) = ^ () {
        NSLog(@"执行了不带参数的函数方法");
        return self;
    };
    return runBlock;
    
 //   改进写法
//    return ^(){
//        NSLog(@"Block Run2");
//        return self;
//    };
}
-(Fouction *(^)(void))working3 {
    return ^() {
        NSLog(@"执行了无参数的方法");
        return self;
    };
}

-(Fouction *(^)(NSString *))working4 {
    Fouction *(^myBlock)(NSString *str) = ^(NSString *str) {
         NSLog(@"执行了传值过来的参数方法--%@",str);
        return self;
    };
    return myBlock;

//    return ^(NSString *str) {
//        NSLog(@"执行了传值过来的参数方法--%@",str);
//        return self;
//    };
}

-(Fouction *(^)(NSString *))dosomething4 {
    return ^(NSString *str) {
        NSLog(@"执行了传值过来的参数方法--%@",str);
        return self;
    };
}

源码git地址：https://gitee.com/WangBaofeng/hanshushibiancheng.git