UIAlertView+RACSignalSupport.m
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//
// UIAlertView+RACSignalSupport.m
// ReactiveCocoa
//
// Created by Henrik Hodne on 6/16/13.
// Copyright (c) 2013 GitHub, Inc. All rights reserved.
//
#import "UIAlertView+RACSignalSupport.h"
#import "RACDelegateProxy.h"
#import "RACSignal+Operations.h"
#import "NSObject+RACDeallocating.h"
#import "NSObject+RACDescription.h"
#import <objc/runtime.h>
@implementation UIAlertView (RACSignalSupport)
static void RACUseDelegateProxy(UIAlertView *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(UIAlertViewDelegate)];
objc_setAssociatedObject(self, _cmd, proxy, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
return proxy;
}
- (RACSignal *)rac_buttonClickedSignal {
RACSignal *signal = [[[[self.rac_delegateProxy
signalForSelector:@selector(alertView:clickedButtonAtIndex:)]
reduceEach:^(UIAlertView *alertView, NSNumber *buttonIndex) {
return buttonIndex;
}]
takeUntil:self.rac_willDeallocSignal]
setNameWithFormat:@"%@ -rac_buttonClickedSignal", self.rac_description];
RACUseDelegateProxy(self);
return signal;
}
- (RACSignal *)rac_willDismissSignal {
RACSignal *signal = [[[[self.rac_delegateProxy
signalForSelector:@selector(alertView:willDismissWithButtonIndex:)]
reduceEach:^(UIAlertView *alertView, NSNumber *buttonIndex) {
return buttonIndex;
}]
takeUntil:self.rac_willDeallocSignal]
setNameWithFormat:@"%@ -rac_willDismissSignal", self.rac_description];
RACUseDelegateProxy(self);
return signal;
}
@end