reactive-cocoa-4

RACObserve in RAC 4

I am woking on a new new swift 2 project using ReactiveCocoa4 and I am wondering how to observe a property change like I dit it before in ObjC.

[RACObserve(self,self.model.wifiState) subscribeNext:^(id newValue){ @strongify(self); self.wifiState = newValue; }];

Do you have any hint?

Thanks

Thierry

Solution

  • You can do the same using DynamicProperty:

    DynamicProperty(object: self.model, keyPath: "wifiState")
    .signal // or `producer` if you care about the current value
    .map { $0 as! WifiState } // Necessary because there is no way to infer the type of the given keyPath.
    .observeNext { [unowned self] self.wifiState = $0 }