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Add Reactive bindings for UIBarButtonItem #7

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Add Reactive bindings for UIBarButtonItem #7

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4 changes: 4 additions & 0 deletions ReactiveUIKit.xcodeproj/project.pbxproj
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
objects = {

/* Begin PBXBuildFile section */
782B49D81C36D52100E5979D /* UIBarButtonItem.swift in Sources */ = {isa = PBXBuildFile; fileRef = 782B49D71C36D52100E5979D /* UIBarButtonItem.swift */; };
EC9549321BF1D8A7000FC2BF /* UICollectionView.swift in Sources */ = {isa = PBXBuildFile; fileRef = EC9549311BF1D8A7000FC2BF /* UICollectionView.swift */; };
EC9549341BF1DC52000FC2BF /* UIControl.swift in Sources */ = {isa = PBXBuildFile; fileRef = EC9549331BF1DC52000FC2BF /* UIControl.swift */; };
EC9549361BF1DE78000FC2BF /* UIButton.swift in Sources */ = {isa = PBXBuildFile; fileRef = EC9549351BF1DE78000FC2BF /* UIButton.swift */; };
Expand Down Expand Up @@ -66,6 +67,7 @@
/* Begin PBXFileReference section */
16E125A11BF5056C00543EFB /* ReactiveUIKit.podspec */ = {isa = PBXFileReference; lastKnownFileType = text; path = ReactiveUIKit.podspec; sourceTree = "<group>"; };
16E125A21BF5056C00543EFB /* README.md */ = {isa = PBXFileReference; lastKnownFileType = net.daringfireball.markdown; path = README.md; sourceTree = "<group>"; };
782B49D71C36D52100E5979D /* UIBarButtonItem.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UIBarButtonItem.swift; sourceTree = "<group>"; };
EC9549311BF1D8A7000FC2BF /* UICollectionView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UICollectionView.swift; sourceTree = "<group>"; };
EC9549331BF1DC52000FC2BF /* UIControl.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UIControl.swift; sourceTree = "<group>"; };
EC9549351BF1DE78000FC2BF /* UIButton.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UIButton.swift; sourceTree = "<group>"; };
Expand Down Expand Up @@ -165,6 +167,7 @@
children = (
ECB7A5441BEB71E10034053A /* ReactiveUIKit.h */,
ECB7A5631BEB72380034053A /* UIView.swift */,
782B49D71C36D52100E5979D /* UIBarButtonItem.swift */,
ECB7A55C1BEB72380034053A /* UIBarItem.swift */,
ECB7A55D1BEB72380034053A /* UIImageView.swift */,
ECB7A55E1BEB72380034053A /* UILabel.swift */,
Expand Down Expand Up @@ -377,6 +380,7 @@
EC95493A1BF1E12E000FC2BF /* UISegmentedControl.swift in Sources */,
EC9549341BF1DC52000FC2BF /* UIControl.swift in Sources */,
EC95493E1BF1E286000FC2BF /* UISwitch.swift in Sources */,
782B49D81C36D52100E5979D /* UIBarButtonItem.swift in Sources */,
ECB7A56C1BEB72380034053A /* UIView.swift in Sources */,
ECB7A5651BEB72380034053A /* UIBarItem.swift in Sources */,
ECB7A5691BEB72380034053A /* UIProgressView.swift in Sources */,
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63 changes: 63 additions & 0 deletions ReactiveUIKit/UIBarButtonItem.swift
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@@ -0,0 +1,63 @@
//
// UIBarButtonItem.swift
// ReactiveUIKit
//
// Created by Ivan Misuno on 01/01/16.
// Copyright © 2016 Srdan Rasic. All rights reserved.
//

import UIKit
import ReactiveKit
import ReactiveFoundation

@objc class RKUIBarButtonItemHelper: NSObject
{
weak var barButtonItem: UIBarButtonItem?
let observer: Void -> Void

init(barButtonItem: UIBarButtonItem, observer: Void -> Void) {
self.barButtonItem = barButtonItem
self.observer = observer
super.init()
if barButtonItem.target != nil {
NSLog("Hijacking existing UIBarButtonItem's target and action: \(barButtonItem)")
}
barButtonItem.target = self
barButtonItem.action = Selector("eventHandler:")
}

func eventHandler(sender: AnyObject) {
observer()
}

deinit {
barButtonItem?.target = nil
}
}

extension UIBarButtonItem {

private struct AssociatedKeys {
static var BarButtonItemActionKey = "r_BarButtonItemActionKey"
static var BarButtonItemBondHelperKey = "r_BarButtonItemBondHelperKey"
}

public var rAction: ActiveStream<Void> {
if let rAction: AnyObject = objc_getAssociatedObject(self, &AssociatedKeys.BarButtonItemActionKey) {
return rAction as! ActiveStream<Void>
} else {
var capturedObserver: (Void -> Void)! = nil

let rAction = ActiveStream<Void> { observer in
capturedObserver = observer
return nil
}

let barButtonItemHelper = RKUIBarButtonItemHelper(barButtonItem: self, observer: capturedObserver)

objc_setAssociatedObject(self, &AssociatedKeys.BarButtonItemBondHelperKey, barButtonItemHelper, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
objc_setAssociatedObject(self, &AssociatedKeys.BarButtonItemActionKey, rAction, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
return rAction
}
}
}