在RAC中可以使用RACSequence,来进行对数组以及字典的快速便利

1、RAC对字典进行遍历

NSDictionary *dict = @{@"user":@"admin",@"age":@"20",@"gender":@"man"};

RACSequence *sequence = dict.rac_sequence;
RACSignal *signal = sequence.signal;
[signal subscribeNext:^(id x) {
    //进行对数据的处理，如下
}];
//可以将上述代码转换如下
[dict.rac_sequence.signal subscribeNext:^(id x) {
    RACTupleUnpack(NSString *key,NSString *value) = x;       
    NSLog(@"%@-%@",key,value);
}];

对字典遍历出来的结果是元组

2016-05-26 10:25:21.335 RACSquence[3323:74315] <RACTuple: 0x7ff610e0a6f0> (
age,
20
)

其中RACTupleUnpack是一个宏，用来解析元组。
他需要的参数就是 键、值，右边的x就是你需要进行处理的元组了。

2、RAC对数组进行遍历

NSString *path = [[NSBundle mainBundle]pathForResource:@"data.plist" ofType:nil];
NSArray *array = [[NSDictionary dictionaryWithContentsOfFile:path]objectForKey:@"data"];

NSMutableArray *dataSource = [NSMutableArray array];
[array.rac_sequence.signal subscribeNext:^(NSDictionary *x) {
   Model *model = [Model modelWithDict:x];
   [dataSource addObject:model];
   NSLog(@"%@",model.date_week);    
}];

其中的array结构如下

Model是一个数据模型

import <Foundation/Foundation.h>

@interface Model : NSObject
@property (nonatomic,copy)NSString *rise_and_fall_rate;
@property (nonatomic,strong)NSNumber* avg5;
@property (nonatomic,strong)NSNumber* avg20;
@property (nonatomic,strong)NSNumber* low_px;
@property (nonatomic,strong)NSNumber* total_value_trade;
@property (nonatomic,strong)NSNumber* avg10;
@property (nonatomic,copy)NSString * date;
@property (nonatomic,strong)NSNumber* pre_close_px;
@property (nonatomic,strong)NSNumber* open_px;
@property (nonatomic,strong)NSNumber* close_px;
@property (nonatomic,strong)NSNumber* total_volume_trade;
@property (nonatomic,strong)NSNumber* high_px;
@property (nonatomic,strong)NSNumber* rise_and_fall_value;
@property (nonatomic,copy)NSString * date_week;

+(instancetype)modelWithDict:(NSDictionary *)dcit;
@end

.m
#import "Model.h"

@implementation Model
+(instancetype)modelWithDict:(NSDictionary *)dcit{
    Model *model = [[self alloc]init];
    [model setValuesForKeysWithDictionary:dcit];//使用KVC进行字典与模型的转换
    return model;
}
@end

RAC对数组进行遍历的高级用法

 //高级用法
   NSArray *arr = [[array.rac_sequence map:^id(NSDictionary* value) {
//        value是集合中的元素
//        id返回对象就是映射的值
        return [Model modelWithDict:value];
    }]array];

    NSLog(@"%@",arr);