Sequences 集合 表示一个不可变的序列值且不能包含空值，
1.实现NSArray的快速遍历
NSArray *numbers = @[@1, @2, @3, @4, @5, @6];
//通过rac_sequence来获取Signal
RACSignal *signal = numbers.rac_sequence.signal;
[signal subscribeNext:^(id x) {
//子线程异步请求
NSLog(@"%@", x);
}];
2.实现NSSet的快速遍历
NSSet *set = [NSSet setWithObjects:@"A", @"B", @"C", @"D", @"E", @"F", nil];
RACSignal *setSignal = set.rac_sequence.signal;
[setSignal subscribeNext:^(id _Nullable x) {
NSLog(@"%@", x);
}];
3.实现NSDictionary的快速遍历
NSDictionary *dict = @{@"key1":@"Hello", @"key2":@"World"};
RACSignal *dictSignal = dict.rac_sequence.signal;
[dictSignal subscribeNext:^(id x) {
NSLog(@"%@", x);
//可以看到x打印出来的是RACTuple对象 RACTuple 元组，使用RACTupleUnpack进行解包
RACTupleUnpack(NSString *key, NSString *value) = x;
NSLog(@"key = %@, value = %@", key, value);
}];
4.针对项目中经常遇到的结构复杂的数据结构中的相同模型转成model
使用rac中的map进行型号传递时的转换
@interface Person : NSObject
@property(nonatomic, strong)NSString *name;
@property(nonatomic, assign)NSInteger sex;
+ (instancetype)personWithDict:(NSDictionary *)dict;
@end
NSArray *personArray = @[@{@"name":@"小张", @"sex":@1}, @{@"name":@"小王", @"sex":@2}];
NSArray *resultArray = [[dictSignal2 map:^id(id value) {
return [Person personWithDict:value];
}] toArray];
NSLog(@"resultArray = %@", resultArray);