播放.caf文件：在模拟器中工作正常但在iPhone中没有 [英] playing a .caf file: works fine in simulator but not in iPhone

问题描述

我正在制作录音机。重新编码和播放在模拟器上工作正常。但在iPhone上它不起作用。 （我按照 iPhoneOSPrmingmingGuide / AudioandVideoTechnologies ）

I'm building a voice recorder. Recoding and playing works fine on simulator. But on iphone it doesn't work. (I followed the exact steps as mentioned in iPhoneOSProgrammingGuide/AudioandVideoTechnologies)

    printf("%s(player)\n",[[self.soundFileURL absoluteString] UTF8String]);

    AVAudioPlayer *newPlayer =
    [[AVAudioPlayer alloc] initWithContentsOfURL: self.soundFileURL error: nil];

    if([self.soundFileURL isFileURL]){
        printf("isFileURL\n");
    }

    self.player = newPlayer;
    [newPlayer release];

    [player prepareToPlay];
    [player setDelegate: self];
    //recorderLabel.text=@"Playing..";
    [player play];
    printf("playing..\n");

调试器输出为
file：// localhost / var / mobile / Applications / 9A607A45-974B-4E9F-9839-FD21B3BC9DD8 / Documents / 1251828741.caf（player）
isFileURL
play ..

The debugger out put is file://localhost/var/mobile/Applications/9A607A45-974B-4E9F-9839-FD21B3BC9DD8/Documents/1251828741.caf(player) isFileURL playing..

推荐答案

iPhone的.caf文件需要编码为单声道，而不是立体声频道，只能用于iPhone。

.caf file for iPhone need to be encoded as a mono channel and not with a stereo channel then only it will work with iPhone.

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