使用rx Swift的过滤条件
我想画一张字典 和flatMap返回一个新的可观察对象。 我试图观察,因为我可能是一个单一的对象或对象数组使用rx Swift的过滤条件,swift,filter,rx-swift,Swift,Filter,Rx Swift,我想画一张字典 和flatMap返回一个新的可观察对象。 我试图观察,因为我可能是一个单一的对象或对象数组 func fetchRibsList() -> Observable<[LCLRibAccount]> { return provider.rxDict(service: .fetchRibsList) .map({ (dict, _) -> [String: Any] in return d
func fetchRibsList() -> Observable<[LCLRibAccount]> {
return provider.rxDict(service: .fetchRibsList)
.map({ (dict, _) -> [String: Any] in
return dict
})
.filter({ dict -> Bool in
dict["ribs"] != nil
})
.filter({ dict -> Bool in
dict["rib"] != nil
})
.flatMap({ dict -> Observable<Any> in
//return either list of ribs or 1 single rib
if let ribs = dict["ribs"] as? [String: Any] {
return Observable.just(LCLRib.parseAccountList(with: ribs))
}
if let rib = dict["rib"] as? [String: Any] {
return Observable.just(LCLRib.parseRib(with: rib))
}
return Observable.empty()
})
}
func fetchRibsList()->可观察{
返回提供程序.rxDict(服务:.fetchRibsList)
.map({(dict,41;)->[String:Any]在
返回指令
})
.filter({dict->Bool-in
dict[“肋骨”!=nil
})
.filter({dict->Bool-in
dict[“rib”!=无
})
.flatMap({dict->Observable问题在于函数的返回类型func fetchRibsList()->Observable
。它需要数组的Observable。也许可以将单个对象包装到数组中。如下所示:
func fetchRibsList() -> Observable<[LCLRibAccount]> {
return provider.rxDict(service: .fetchRibsList)
.map({ (dict, _) -> [String: Any] in
return dict
})
.filter({ dict -> Bool in
dict["ribs"] != nil
})
.filter({ dict -> Bool in
dict["rib"] != nil
})
.flatMap({ dict -> Observable<[LCLRibAccount]> in
//return either list of ribs or 1 single rib
if let ribs = dict["ribs"] as? [String: Any] {
return Observable.just(LCLRib.parseAccountList(with: ribs))
}
if let rib = dict["rib"] as? [String: Any] {
return Observable.just([LCLRib.parseRib(with: rib)]) //wrap single object in array
}
return Observable.empty()
})
}
func fetchRibsList()->可观察{
返回提供程序.rxDict(服务:.fetchRibsList)
.map({(dict,41;)->[String:Any]在
返回指令
})
.filter({dict->Bool-in
dict[“肋骨”!=nil
})
.filter({dict->Bool-in
dict[“rib”!=无
})
.flatMap({dict->在
//返回肋骨列表或一个肋骨
如果让肋骨=dict[“肋骨”]作为?[字符串:任意]{
返回Observable.just(LCLRib.parseAccountList(带:肋骨))
}
如果让rib=dict[“rib”]作为?[字符串:任意]{
return Observable.just([LCLRib.parseRib(with:rib)])//在数组中包装单个对象
}
返回可观察的.empty()
})
}