/// <summary>
/// 已经学习
/// </summary>
/// <param name="source">Source.</param>
/// <param name="predicate">Predicate.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
public static IObservable <T> Where <T>(this IObservable <T> previousObservable, Func <T, bool> predicate)
{
return(AnonymousObservable.Create <T>(nextObserver => //看上去不一样 神经病啊 明明一样 为什么要这么写？
{
return previousObservable.Subscribe(AnonymousObserver.Create <T>(x => //关键字 同样是 新的观察者
{ //也就是说对这个obs注册的观察者 自动转换成一个新的观察者 !!!
if (predicate(x))
{
nextObserver.OnNext(x);
}
}, nextObserver.OnError, nextObserver.OnCompleted));
}));
}
public static IDisposable Subscribe <T>(this IObservable <T> source, Action <T> onNext, Action <Exception> onError, Action onCompleted)
{
return(source.Subscribe(AnonymousObserver.Create(onNext, onError, onCompleted)));
}
public static IDisposable Subscribe <T>(this IObservable <T> source)
{
return(source.Subscribe(AnonymousObserver.Create <T>(_ => { }, _ => { }, () => { })));
}
public static IDisposable Subscribe <T>(this IObservable <T> source, Action <T> onNext)
{
return(source.Subscribe(AnonymousObserver.Create(onNext, _ => { }, () => { })));
}
public IDisposable Subscirbe(Action <Msg> msgHandler)
{
return(mMsgDispather.Subscribe(AnonymousObserver.Create <Msg>(msgHandler, e => { }, () => { })));//注册需要observer
}