Created
November 9, 2014 15:32
-
-
Save jparishy/7b76edf8d0fcca1d63b0 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// | |
// FunctionPointer.h | |
// AudioServicesTest | |
// | |
// Created by Julius Parishy on 11/9/14. | |
// Copyright (c) 2014 Julius Parishy. All rights reserved. | |
// | |
#import <Foundation/Foundation.h> | |
#import <AudioToolbox/AudioToolbox.h> | |
typedef void(^AudioServicesCompletionBlock)(SystemSoundID soundID, void *userData); | |
@interface AudioServicesCompletionFunctionPointer : NSObject | |
/* | |
* Pass the same SystemSoundID & userData you pass to `AudioServicesAddSystemSoundCompletion`. | |
* `block` is the block you'd like to be called for the completion handler. | |
* | |
* A weak reference is held to the instance returned so you must keep it alive by | |
* holding a strong reference or it will be deallocated prematurely. | |
*/ | |
- (instancetype)initWithSystemSoundID:(SystemSoundID)systemSoundID block:(AudioServicesCompletionBlock)block userData:(void *)userData; | |
/* | |
* Pass this as the completion handler to `AudioServicesAddSystemSoundCompletion` | |
*/ | |
+ (AudioServicesSystemSoundCompletionProc)completionHandler; | |
@end |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// | |
// FunctionPointer.m | |
// AudioServicesTest | |
// | |
// Created by Julius Parishy on 11/9/14. | |
// Copyright (c) 2014 Julius Parishy. All rights reserved. | |
// | |
#import "FunctionPointer.h" | |
void AudioServicesSystemSoundDidComplete(SystemSoundID soundID, void *userData); | |
@interface AudioServicesCompletionFunctionPointer () | |
@property (nonatomic, assign) SystemSoundID systemSoundID; | |
@property (nonatomic, unsafe_unretained) void *userData; | |
@property (nonatomic, copy) AudioServicesCompletionBlock completionBlock; | |
@end | |
@implementation AudioServicesCompletionFunctionPointer | |
+ (NSMapTable *)sharedMapTable | |
{ | |
static NSMapTable *mapTable = nil; | |
static dispatch_once_t onceToken; | |
dispatch_once(&onceToken, ^{ | |
mapTable = [NSMapTable mapTableWithKeyOptions:NSPointerFunctionsStrongMemory valueOptions:NSPointerFunctionsWeakMemory]; | |
}); | |
return mapTable; | |
} | |
- (instancetype)initWithSystemSoundID:(SystemSoundID)systemSoundID block:(AudioServicesCompletionBlock)block userData:(void *)userData | |
{ | |
if((self = [super init])) | |
{ | |
self.systemSoundID = systemSoundID; | |
self.userData = userData; | |
self.completionBlock = block; | |
NSMapTable *mapTable = self.class.sharedMapTable; | |
NSValue *key = [NSValue valueWithPointer:self.userData]; | |
[mapTable setObject:self forKey:key]; | |
} | |
return self; | |
} | |
- (void)dealloc | |
{ | |
NSMapTable *mapTable = self.class.sharedMapTable; | |
NSValue *key = [NSValue valueWithPointer:_userData]; | |
[mapTable removeObjectForKey:key]; | |
} | |
+ (AudioServicesSystemSoundCompletionProc)completionHandler | |
{ | |
return &AudioServicesSystemSoundDidComplete; | |
} | |
@end | |
void AudioServicesSystemSoundDidComplete(SystemSoundID soundID, void *userData) | |
{ | |
NSMapTable *mapTable = [AudioServicesCompletionFunctionPointer sharedMapTable]; | |
NSValue *key = [NSValue valueWithPointer:userData]; | |
AudioServicesCompletionFunctionPointer *functionPointer = (AudioServicesCompletionFunctionPointer *)[mapTable objectForKey:key]; | |
NSCAssert(functionPointer != nil, @"No block for this userData found."); | |
if(functionPointer.systemSoundID != soundID) | |
return; | |
AudioServicesCompletionBlock block = functionPointer.completionBlock; | |
block(soundID, userData); | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// | |
// ViewController.swift | |
// AudioServicesTest | |
// | |
// Created by Julius Parishy on 11/9/14. | |
// Copyright (c) 2014 Julius Parishy. All rights reserved. | |
// | |
import UIKit | |
import AudioToolbox | |
class ViewController: UIViewController { | |
var functionPointer: AudioServicesCompletionFunctionPointer? | |
override func viewDidLoad() { | |
super.viewDidLoad() | |
// Do any additional setup after loading the view, typically from a nib. | |
let inSystemSoundID = SystemSoundID(kSystemSoundID_Vibrate) | |
let block = { | |
(systemSoundID: SystemSoundID, userData: UnsafeMutablePointer<Void>) in | |
println("Completed!") | |
} | |
var vself = self | |
let userData = withUnsafePointer(&vself, { | |
(ptr: UnsafePointer<ViewController>) -> UnsafeMutablePointer<Void> in | |
return unsafeBitCast(ptr, UnsafeMutablePointer<Void>.self) | |
}) | |
self.functionPointer = AudioServicesCompletionFunctionPointer(systemSoundID: inSystemSoundID, block: block, userData: userData) | |
AudioServicesAddSystemSoundCompletion(inSystemSoundID, CFRunLoopGetMain(), kCFRunLoopCommonModes, AudioServicesCompletionFunctionPointer.completionHandler(), userData) | |
} | |
@IBAction func vibrateButtonPressed(button: UIButton) { | |
let systemSoundID = SystemSoundID(kSystemSoundID_Vibrate) | |
AudioServicesPlaySystemSound(systemSoundID) | |
} | |
override func didReceiveMemoryWarning() { | |
super.didReceiveMemoryWarning() | |
// Dispose of any resources that can be recreated. | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment