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Merge pull request ReactiveCocoa#1251 from TimurBK/master
Added RAC support for UIImagePickerController.
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33 changes: 33 additions & 0 deletions
33
ReactiveCocoaFramework/ReactiveCocoa/UIImagePickerController+RACSignalSupport.h
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| // | ||
| // UIImagePickerController+RACSignalSupport.h | ||
| // ReactiveCocoa | ||
| // | ||
| // Created by Timur Kuchkarov on 28.03.14. | ||
| // Copyright (c) 2014 GitHub. All rights reserved. | ||
| // | ||
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| #import <UIKit/UIKit.h> | ||
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| @class RACDelegateProxy; | ||
| @class RACSignal; | ||
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| @interface UIImagePickerController (RACSignalSupport) | ||
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| /// A delegate proxy which will be set as the receiver's delegate when any of the | ||
| /// methods in this category are used. | ||
| @property (nonatomic, strong, readonly) RACDelegateProxy *rac_delegateProxy; | ||
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| /// Creates a signal for every new selected image. | ||
| /// | ||
| /// When this method is invoked, the `rac_delegateProxy` will become the | ||
| /// receiver's delegate. Any previous delegate will become the -[RACDelegateProxy | ||
| /// rac_proxiedDelegate], so that it receives any messages that the proxy doesn't | ||
| /// know how to handle. Setting the receiver's `delegate` afterward is considered | ||
| /// undefined behavior. | ||
| /// | ||
| /// Returns a signal which will send the dictionary with info for the selected image. | ||
| /// Caller is responsible for picker controller dismissal. The signal will complete | ||
| /// itself when the receiver is deallocated or when user cancels selection. | ||
| - (RACSignal *)rac_imageSelectedSignal; | ||
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| @end |
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ReactiveCocoaFramework/ReactiveCocoa/UIImagePickerController+RACSignalSupport.m
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,53 @@ | ||
| // | ||
| // UIImagePickerController+RACSignalSupport.m | ||
| // ReactiveCocoa | ||
| // | ||
| // Created by Timur Kuchkarov on 28.03.14. | ||
| // Copyright (c) 2014 GitHub. All rights reserved. | ||
| // | ||
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| #import "UIImagePickerController+RACSignalSupport.h" | ||
| #import "RACDelegateProxy.h" | ||
| #import "RACSignal+Operations.h" | ||
| #import "NSObject+RACDeallocating.h" | ||
| #import "NSObject+RACDescription.h" | ||
| #import <objc/runtime.h> | ||
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| @implementation UIImagePickerController (RACSignalSupport) | ||
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| static void RACUseDelegateProxy(UIImagePickerController *self) { | ||
| if (self.delegate == self.rac_delegateProxy) return; | ||
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| self.rac_delegateProxy.rac_proxiedDelegate = self.delegate; | ||
| self.delegate = (id)self.rac_delegateProxy; | ||
| } | ||
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| - (RACDelegateProxy *)rac_delegateProxy { | ||
| RACDelegateProxy *proxy = objc_getAssociatedObject(self, _cmd); | ||
| if (proxy == nil) { | ||
| proxy = [[RACDelegateProxy alloc] initWithProtocol:@protocol(UIImagePickerControllerDelegate)]; | ||
| objc_setAssociatedObject(self, _cmd, proxy, OBJC_ASSOCIATION_RETAIN_NONATOMIC); | ||
| } | ||
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| return proxy; | ||
| } | ||
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| - (RACSignal *)rac_imageSelectedSignal { | ||
| RACSignal *pickerCancelledSignal = [[self.rac_delegateProxy | ||
| signalForSelector:@selector(imagePickerControllerDidCancel:)] | ||
| merge:self.rac_willDeallocSignal]; | ||
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| RACSignal *imagePickerSignal = [[[[self.rac_delegateProxy | ||
| signalForSelector:@selector(imagePickerController:didFinishPickingMediaWithInfo:)] | ||
| reduceEach:^(UIImagePickerController *pickerController, NSDictionary *userInfo) { | ||
| return userInfo; | ||
| }] | ||
| takeUntil:pickerCancelledSignal] | ||
| setNameWithFormat:@"%@ -rac_imageSelectedSignal", [self rac_description]]; | ||
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| RACUseDelegateProxy(self); | ||
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| return imagePickerSignal; | ||
| } | ||
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| @end |
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51
ReactiveCocoaFramework/ReactiveCocoaTests/UIImagePickerControllerRACSupportSpec.m
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| // | ||
| // UIImagePickerControllerRACSupportSpec.m | ||
| // ReactiveCocoa | ||
| // | ||
| // Created by Timur Kuchkarov on 17.04.14. | ||
| // Copyright (c) 2014 GitHub, Inc. All rights reserved. | ||
| // | ||
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| #import "UIImagePickerController+RACSignalSupport.h" | ||
| #import "RACSignal.h" | ||
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| SpecBegin(UIImagePickerControllerRACSupport) | ||
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| describe(@"UIImagePickerController", ^{ | ||
| __block UIImagePickerController *imagePicker; | ||
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| beforeEach(^{ | ||
| imagePicker = [[UIImagePickerController alloc] init]; | ||
| expect(imagePicker).notTo.beNil(); | ||
| }); | ||
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| it(@"sends the user info dictionary after confirmation", ^{ | ||
| __block NSDictionary *selectedImageUserInfo = nil; | ||
| [imagePicker.rac_imageSelectedSignal subscribeNext:^(NSDictionary *userInfo) { | ||
| selectedImageUserInfo = userInfo; | ||
| }]; | ||
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| NSDictionary *info = @{ | ||
| UIImagePickerControllerMediaType: @"public.image", | ||
| UIImagePickerControllerMediaMetadata: @{} | ||
| }; | ||
| [imagePicker.delegate imagePickerController:imagePicker didFinishPickingMediaWithInfo:info]; | ||
| expect(selectedImageUserInfo).to.equal(info); | ||
| }); | ||
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| it(@"cancels image picking process", ^{ | ||
| __block BOOL didSend = NO; | ||
| __block BOOL didComplete = NO; | ||
| [imagePicker.rac_imageSelectedSignal subscribeNext:^(NSDictionary *userInfo) { | ||
| didSend = YES; | ||
| } completed:^{ | ||
| didComplete = YES; | ||
| }]; | ||
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| [imagePicker.delegate imagePickerControllerDidCancel:imagePicker]; | ||
| expect(didSend).to.beFalsy(); | ||
| expect(didComplete).to.beTruthy(); | ||
| }); | ||
| }); | ||
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| SpecEnd |