01--Sound (short audio)

There are two types of audio: 1, sound 2, music playback requires two frames:avfoundation.frameworkaudiotoolbox.framework

1 #import "ViewController.h" 2 #import<AVFoundation/AVFoundation.h>3 @interfaceViewcontroller ()4@property (nonatomic,assign) Systemsoundid Soundid;5  6 @end 7  8 @implementationViewcontroller9 Ten- (void) Viewdidload { One[Super Viewdidload]; A } -  - //need a lazy load-otherwise no sound will report err-50 error the-(systemsoundid) Soundid - { -     if(!_soundid) -     { +Nsurl *url = [[NSBundle mainbundle] Urlforresource:@"M_03.wav"Withextension:nil]; -Audioservicescreatesystemsoundid (__bridge cfurlref _nonnull) (URL), &_soundid); +     } A     return_soundid; at } -  --(void) touchesended: (Nsset<uitouch *> *) touches withevent: (Uievent *)Event - { -     //Loading sound files (short audio) 1 audio files-1 Soundid - //Systemsoundid Soundid; in //Nsurl *url = [[NSBundle mainbundle] urlforresource:@ "M_03.wav" withextension:nil]; - //Audioservicescreatesystemsoundid ((__bridge cfurlref _nonnull) URL, &soundid); to      +     //get the sound ID to play -Audioservicesplaysystemsound (self.soundid); the      * } $ Panax Notoginseng-(void) didreceivememorywarning - { the[Super didreceivememorywarning]; +      AAudioservicesdisposesystemsoundid (Self.soundid);//There's a creation, there's destruction . theSelf.soundid =0; +}

Viewcontroller Code

But since each soundid corresponds to one audio, it is tedious to make multiple soundid when there is more than one audio, in order to simplify, create a tool class

Audiotool

+ (void) PlaySound: (NSString *) fileName

{

Systemsoundid Soundid;

Nsurl *url = [[NSBundle mainbundle] Urlforresource:filename Withextension:nil];

Audioservicescreatesystemsoundid ((__bridge cfurlref _nonnull) URL, &soundid);

}

Since the destruction is required to get the previously created Soundid to destroy, so to take the soundid out as a global (you might think of member variables at the moment-but the class method is not allowed to access member variables, so get a global static)

+ (void) Disposesound: (NSString *) fileName

{

}

1 #import "AudioTool.h"2 #import<AVFoundation/AVFoundation.h>3 @implementationAudiotool4 5 //dictionary: FileName as key, soundid as value6 //Store all audio IDs7 StaticNsmutabledictionary *_soundiddict;8+(void) Initialize9 {Ten_soundiddict =[Nsmutabledictionary dictionary]; One } A  -+(void) PlaySound: (NSString *) FileName - { the     if(!filename)return; -      -Systemsoundid Soundid =[_soundiddict[filename] unsignedintvalue]; -     if(!soundid)//Create +     { -Nsurl *url =[[NSBundle Mainbundle] Urlforresource:filename Withextension:nil]; +         if(!url)return; A          at         //1----Creating a sound ID -Audioservicescreatesystemsoundid (__bridge cfurlref _nonnull) URL, &soundid); -          -         //put in a dictionary -_soundiddict[filename] =@ (soundid); -     } in      -     //2-----play--audioservicesplaysystemsound play short audio long audio-audioplayer to Audioservicesplaysystemsound (soundid); + } -  the+(void) Disposesound: (NSString *) FileName * { $     if(!filename)return;Panax NotoginsengSystemsoundid Soundid =[_soundiddict[filename] unsignedintvalue]; -     if(Soundid)//If there is soundid destruction the     { + Audioservicesdisposesystemsoundid (soundid); A          the[_soundiddict Removeobjectforkey:filename];//Remove from dictionary +     } -}

Audiotool

1 #import "ViewController.h"2 //#import <AVFoundation/AVFoundation.h>3 #import "AudioTool.h"4 @interfaceViewcontroller ()5 6 @end7 8 @implementationViewcontroller9 Ten- (void) Viewdidload { One [Super Viewdidload]; A } -  -  the-(void) touchesended: (Nsset<uitouch *> *) touches withevent: (Uievent *)Event - { -NSString *filename = [NSString stringWithFormat:@"M_%02d.wav", Arc4random_uniform ( -)+3]; -      + [Audiotool playsound:filename]; - } +  A-(void) didreceivememorywarning at { - [Super didreceivememorywarning]; -      - //[Audiotool disposesound:@ "M_03.wav"]; -}

Viewcontroller Code

01--Sound (short audio)