如何在 xcode 中的 iOS 5 中播放随机声音?
我不断收到“抛出异常”错误。
我试过了:
int randomNumber = arc4random() % 24 + 1;
NSString *tmpFileNameRandom = [[NSString alloc] initWithFormat"Sound%d", randomNumber];
NSString *fileName = [[NSBundle mainBundle] pathForResource:tmpFileNameRandom ofType"mp3"];
AVAudioPlayer * soundPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:fileName] error:nil];
[soundPlayer prepareToPlay];
[soundPlayer play];
谢谢!
Best Answer-推荐答案 strong>
首先,将您的 ViewController.h 更改为
#import <UIKit/UIKit.h>
@class AVAudioPlayer;
@interface ViewController : UIViewController
-(IBAction)PlayRandomSound;
@property (nonatomic, retain) AVAudioPlayer *soundPlayer;
@end
和 ViewController.m 的第一行到
#import "ViewController.h"
#import <AVFoundation/AVAudioPlayer.h>
@implementation ViewController
@synthesize soundPlayer = _soundPlayer;
-(IBAction)PlayRandomSound{
int randomNumber = arc4random() % 8 + 1;
NSURL *soundURL = [NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:[NSString stringWithFormat"Sound%02d", randomNumber] ofType"mp3"]];
_soundPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:soundURL error:nil];
[_soundPlayer prepareToPlay];
[_soundPlayer play];
NSLog(@"randomNumber is %d", randomNumber);
NSLog(@"tmpFilename is %@", soundURL);
}
编辑:我后来才注意到你没有使用 ARC,所以这段代码有一点泄漏。但它会开始。也许你应该在创建 ViewController 时将 _soundPlayer 设置为 nil 并稍后检查:如果它不是 nil:释放它并创建一个新的,否则只创建一个新的。或者,如果是新项目,您可以考虑切换到 ARC。
关于objective-c - 播放随机声音,我们在Stack Overflow上找到一个类似的问题:
https://stackoverflow.com/questions/8975266/
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