ios - 由 EventProducerType 生成的节流事件 - Swift Bond

Question

我想限制 SwiftBond 的 EventProducerType 生成的事件框架。

以下是我测试如何限制事件的方法:

var throttledObserver: EventProducer<String?>!

init() {
  throttledObserver = Observable<String?>(nil).throttle(1000, queue: Queue.Main)      

  throttledObserver.observeNew { text in
    // This is always printed no matter how large the throttle time interval is
    print(text)
  }
}

// UISearchBarDelegate method
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
  throttledObserver.next(searchText)
}

通过这种方法，没有限制，并且文本更改后会立即打印。我的目标是限制 UISearchBar 的搜索文本，以发出网络请求以从端点检索一些数据。

Answer 1

我让它可以与以下内容一起使用:

var throttledObserver = Observable<String?>!

init() {
  throttledObserver = Observable<String?>(nil)

  // the key is not to save the returned value from throttle into a variable, but to set the observation immediately
  throttledObserver.throttle(1000, queue: Queue.Main)
    .observeNew { text in
      print(text)
    }
}

// UISearchBarDelegate method
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
  throttledObserver.next(searchText)
}