CODEWITHSUNDEEP
iosswiftreactive-cocoa
nburk
nburk

Reputation: 22731

Get Signal from tap on UIButton in Reactive Cocoa 4

How can I create a Signal from a tap on a UIButton?

So far I tried to use target/action, but have come to think that there might be an easier way.

In an article of Colin Eberhardt, it is stated that Signals are appropriate for UI actions. But when I tried to make my around with target/action, I needed to create a CocoaAction was ultimately initialised with a SignalProducer.

What I want is some Signal that emits its next events with every user tap. I then want to transform this Signal to read from UITextFields and carry on those values to use them in my application.

Upvotes: 7

Views: 1962

Answers (2)

pcwang
pcwang

Reputation: 61

 self.startButton
     .rac_signalForControlEvents(UIControlEvents.TouchUpInside)
     .subscribeNext { event in
         if let names = event.value {
            print("received names \(names)")
         }
     }

Upvotes: 4

nburk
nburk

Reputation: 22731

Using convenience functions from this gist by @NachoSoto, I was able to achieve this quite simply with signalForControlEvents(UIControlEvents.TouchUpInside) :

self.startButton
      .signalForControlEvents(UIControlEvents.TouchUpInside)
      .map { _ in (self.name1TextField.text!, self.name2TextField.text!)}
      .observe { event in
          if let names = event.value {
              print("received names \(names)")
          }
       }

Upvotes: 8

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