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46 changes: 46 additions & 0 deletions
46
ALCameraViewController/Utilities/PhotoLibraryAuthorizer.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| // | ||
| // PhotoLibraryAuthorizer.swift | ||
| // ALCameraViewController | ||
| // | ||
| // Created by Alex Littlejohn on 2016/03/26. | ||
| // Copyright © 2016 zero. All rights reserved. | ||
| // | ||
|
|
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| import UIKit | ||
| import Photos | ||
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| public typealias PhotoLibraryAuthorizerCompletion = (error: NSError?) -> Void | ||
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| class PhotoLibraryAuthorizer { | ||
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| private let errorDomain = "com.zero.imageFetcher" | ||
| private let completion: PhotoLibraryAuthorizerCompletion | ||
|
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| init(completion: PhotoLibraryAuthorizerCompletion) { | ||
| self.completion = completion | ||
| handleAuthorization(PHPhotoLibrary.authorizationStatus()) | ||
| } | ||
|
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| func onDeniedOrRestricted() { | ||
| let error = errorWithKey("error.access-denied", domain: errorDomain) | ||
| completion(error: error) | ||
| } | ||
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| func handleAuthorization(status: PHAuthorizationStatus) { | ||
| switch status { | ||
| case .NotDetermined: | ||
| PHPhotoLibrary.requestAuthorization(handleAuthorization) | ||
| break | ||
| case .Authorized: | ||
| dispatch_async(dispatch_get_main_queue()) { | ||
| self.completion(error: nil) | ||
| } | ||
| break | ||
| case .Denied, .Restricted: | ||
| dispatch_async(dispatch_get_main_queue()) { | ||
| self.onDeniedOrRestricted() | ||
| } | ||
| break | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| // | ||
| // UIButtonExtensions.swift | ||
| // ALCameraViewController | ||
| // | ||
| // Created by Alex Littlejohn on 2016/03/26. | ||
| // Copyright © 2016 zero. All rights reserved. | ||
| // | ||
|
|
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| import UIKit | ||
|
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| typealias ButtonAction = () -> Void | ||
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| extension UIButton { | ||
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| private struct AssociatedKeys { | ||
| static var ActionKey = "ActionKey" | ||
| } | ||
|
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| private class ActionWrapper { | ||
| let action: ButtonAction | ||
| init(action: ButtonAction) { | ||
| self.action = action | ||
| } | ||
| } | ||
|
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| var action: ButtonAction? { | ||
| set(newValue) { | ||
| removeTarget(self, action: #selector(UIButton.performAction), forControlEvents: UIControlEvents.TouchUpInside) | ||
| var wrapper: ActionWrapper? | ||
| if let newValue = newValue { | ||
| wrapper = ActionWrapper(action: newValue) | ||
| addTarget(self, action: #selector(UIButton.performAction), forControlEvents: UIControlEvents.TouchUpInside) | ||
| } | ||
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| objc_setAssociatedObject(self, &AssociatedKeys.ActionKey, wrapper, .OBJC_ASSOCIATION_RETAIN_NONATOMIC) | ||
| } | ||
| get { | ||
| guard let wrapper = objc_getAssociatedObject(self, &AssociatedKeys.ActionKey) as? ActionWrapper else { | ||
| return nil | ||
| } | ||
|
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| return wrapper.action | ||
| } | ||
| } | ||
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| func performAction() { | ||
| if let a = action { | ||
| a() | ||
| } | ||
| } | ||
| } | ||
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