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我有3个相关信号,我想将它们的值组合到一个对象中。我想出了2个选项。链接相关信号并组合它们的值
选项1:
+ (RACSignal *)createObject {
RACSignal *paramsSignal = [[[self class] createObject1] flattenMap:^RACStream *(NSString *object1) {
return [[[self class] createObject2:object1] flattenMap:^RACStream *(NSString *object2) {
return [[[self class] createObject3:object2] flattenMap:^RACStream *(NSString *object3) {
return [RACSignal return:RACTuplePack(object1, object2, object3)];
}];
}];
}];
return [paramsSignal map:^id(RACTuple *tuple) {
return [[CombinedObject alloc] initWithO1: tuple.first O2: tuple.second O3: tuple.third];
}];
}
我不太喜欢所有的嵌套和关闭。
选项2:
+ (RACSignal *)createObject {
RACSignal *paramsSignal = [[[[self class] createObject1] flattenMap:^id(NSManagedObjectModel *object1) {
return [RACSignal combineLatest:@[[RACSignal return:object1], [[self class] createObject2:object1]]];
}] flattenMap:^RACStream *(RACTuple *tuple) {
return [RACSignal combineLatest:@[[RACSignal return:tuple.first], [RACSignal return:tuple.second], [[self class] createObject3:tuple.second]]];
}];
return [paramsSignal map:^id(RACTuple *tuple) {
return [[CombinedObject alloc] initWithO1: tuple.first O2: tuple.second O3: tuple.third];
}];
}
没有嵌套或关门,而是太多的元组和对象通过每个信号的...
所以我想知道是否有更好的解决方案,我不存在。
谢谢。