| // |
| // UIActionSheet+RACSignalSupport.m |
| // ReactiveCocoa |
| // |
| // Created by Dave Lee on 2013-06-22. |
| // Copyright (c) 2013 GitHub, Inc. All rights reserved. |
| // |
| |
| #import "UIActionSheet+RACSignalSupport.h" |
| #import "RACDelegateProxy.h" |
| #import "RACSignal+Operations.h" |
| #import "NSObject+RACDeallocating.h" |
| #import "RACTuple.h" |
| #import "NSObject+RACDescription.h" |
| #import <objc/runtime.h> |
| |
| @implementation UIActionSheet (RACSignalSupport) |
| |
| static void RACUseDelegateProxy(UIActionSheet *self) { |
| if (self.delegate == self.rac_delegateProxy) return; |
| |
| self.rac_delegateProxy.rac_proxiedDelegate = self.delegate; |
| self.delegate = (id)self.rac_delegateProxy; |
| } |
| |
| - (RACDelegateProxy *)rac_delegateProxy { |
| RACDelegateProxy *proxy = objc_getAssociatedObject(self, _cmd); |
| if (proxy == nil) { |
| proxy = [[RACDelegateProxy alloc] initWithProtocol:@protocol(UIActionSheetDelegate)]; |
| objc_setAssociatedObject(self, _cmd, proxy, OBJC_ASSOCIATION_RETAIN_NONATOMIC); |
| } |
| |
| return proxy; |
| } |
| |
| - (RACSignal *)rac_buttonClickedSignal { |
| RACSignal *signal = [[[[self.rac_delegateProxy |
| signalForSelector:@selector(actionSheet:clickedButtonAtIndex:)] |
| reduceEach:^(UIActionSheet *actionSheet, NSNumber *buttonIndex) { |
| return buttonIndex; |
| }] |
| takeUntil:self.rac_willDeallocSignal] |
| setNameWithFormat:@"%@ -rac_buttonClickedSignal", [self rac_description]]; |
| |
| RACUseDelegateProxy(self); |
| |
| return signal; |
| } |
| |
| @end |
