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ReactiveCocoa v4.2.2 发布

ReactiveCocoa的核心为signals即RACSignal类。Signals发出三种类型的事件流:next、completed、和error。

通过此模式,ReactiveCocoa可以用来替代delegate、target-action、key-value observing等模式。

通过signal API创建的代码更加统一且易读.但ReactiveCocoa真正强大之处在于通过这些信号源能进行更多高级操作.这些操作能在相当简洁高雅的操作下执行复杂的筛选、转换、信号协调等。在MVVM中,ReactiveCocoa扮演着重要角色.它提供ViewModel和View之间的绑定操作。

更新日志

添加

Support for Swift 2.3 (#3005, thanks @ikesyo!)
Signal.observeResult/SignalProducer.startWithResult for observing values with explicit error handling (#3011, thanks @NachoSoto!)
A sandbox page to the playground (#3031, thanks @RuiAAPeres!)

改进

API documentation now uses Xcode’s markup (#2995, thanks @tomj and @eimantas!)

已弃用

Signal.observeNext/SignalProducer.startWithNext have been deprecated on error-producing signals/producers in favor of the new result variants (#3011, thanks @NachoSoto!)
SignalProducer.buffer() has been deprecated in anticipation of its removal in RAC 5 (#3015, thanks @mdiep!)

Bug修复

SignalProducer(values: Value...) was ambiguous with SignalProducer(values: [Value]) whenValue was a signal/producer (#3043, thanks @ikesyo!)
MutableProperty binding leaked when disposing (#3018, thanks @azeff!)