RAC学习（三）- RACTuple & RACSequence集合类

第一个：RACTuple 元祖类

• RACTuple类似于数组NSArray

//元祖类 ：类似于 数组
    RACTuple * tuple = [RACTuple tupleWithObjectsFromArray:@[@"111",@"222",@"333"]];
    NSString * str = tuple[1];
    NSLog(@"%s == %@",__func__,str);

第二个：RACSequence 集合类

• RACSequence：用于代替NSArray,NSDictionary,可以快速的遍历
• 最常见的应用常见：字典转模型

代码一：快速遍历数组

//数组
    NSArray * arr = @[@"abc",@"bcd",@123];
    //RAC集合类
    RACSequence * requence = arr.rac_sequence;
    //遍历
    RACSignal * signal = requence.signal;
    
    //订阅信号
    [signal subscribeNext:^(id  _Nullable x) {
        NSLog(@"%s == %@",__func__,x);
    }]; 

整合上述代码

//数组
    NSArray * arr = @[@"abc",@"bcd",@123];
   [arr.rac_sequence.signal subscribeNext:^(id  _Nullable x) {
        NSLog(@"%s == %@",__func__,x);
    }];

输出结果显示

代码二：解析NSDictionary

    //字典
    NSDictionary * dic = @{@"name":@"lionsom",@"age":@12};
    
    //字典转集合
    [dic.rac_sequence.signal subscribeNext:^(RACTuple* x) {
        //宏 ： 解析元祖
        //宏里面的参数 : 传入需要解析出来的变量名称
        //右边,放需要解析的元祖
        RACTupleUnpack(NSString * key,NSString * value) = x;
      
        NSLog(@"%@:%@",key,value);
        
        if ([key isEqualToString:@"name"]) {
            NSLog(@"Vaule == %@",value);
        }
    }];

显示结果

代码三：JSON数组快速转Model对象

//文件路径
    NSString * path = [[NSBundle mainBundle]pathForResource:@"kfc.plist" ofType:nil];
    
    NSArray * dicArr = [NSArray arrayWithContentsOfFile:path];
    
    NSMutableArray * arr = [NSMutableArray array];
    
    [dicArr.rac_sequence.signal subscribeNext:^(id  _Nullable x) {
        //将对象进行逐个转换，然后添加到对象数组中
        KFC * kfc = [KFC kfcWithDict:x];
        [arr addObject:kfc];
    }];

代码优化：

    NSArray * arr_1 = [[dicArr.rac_sequence map:^id _Nullable(id  _Nullable value) {
        return [KFC kfcWithDict:value];
    }] array];
    
    NSLog(@"%@",arr_1);