Can't play a sound with a space in the (NSURL *)sound_url

问题

I want to play a sound like this:

#define url(x) [NSURL URLWithString:x]
....

AVAudioPlayer *myFatBeat;
myFatBeat = [[AVAudioPlayer alloc] initWithContentsOfURL:url(@"/Library/Ringtones/Bell% Tower.m4r") error:nil];
[myFatBeat setNumberOfLoops:-1];  
[myFatBeat play];

but it fails. I think it's due to the space between Belland Tower, as it works if the sound name is Àlarm. Then, I tried to escape the sound name like this Bell\ Tower, but I get error: unknown escape sequence: '\040' when compiling.

Any ideas ?

回答1:

I forgot if this is how you do it in an NSUrl, but you can try %20 instead of the space.

myFatBeat = [[AVAudioPlayer alloc]     
initWithContentsOfURL:url(@"/Library/Ringtones/Bell%20Tower.m4r") error:nil];

回答2:

Encode your URL first:

#define url(x) [NSURL URLWithString:[x stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]]

来源：https://stackoverflow.com/questions/6165539/cant-play-a-sound-with-a-space-in-the-nsurl-sound-url