当我触摸特定按钮时我的应用程序崩溃
这是我的按钮的标题。
IBOutlet UIButton *buttonOneOne;
}
- (IBAction)buttonOneOne:(id)sender;
@property (nonatomic, retain) IBOutlet UIButton *buttonOneOne;
这就是我放入 .m 文件中的内容，
- (IBAction)buttonOneOne:(id)sender {
NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"95" ofType:@".wav"];
NSError *activationError = nil;
NSError *audioPlayerInitError = nil;
[[AVAudioSession sharedInstance] setActive: YES error:&activationError];
NSURL *newURL = [NSURL fileURLWithPath:soundFilePath];
AVAudioPlayer *musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:newURL error:&audioPlayerInitError];
[musicPlayer prepareToPlay];
[musicPlayer setVolume:.8];
[musicPlayer setNumberOfLoops:-1]; // -1 means play indefintely
[musicPlayer setDelegate: self];
[musicPlayer play];
}
为什么它会崩溃？
Here is the header for my button.
IBOutlet UIButton *buttonOneOne;
}
- (IBAction)buttonOneOne:(id)sender;
@property (nonatomic, retain) IBOutlet UIButton *buttonOneOne;
This is what i put in my .m file for it
- (IBAction)buttonOneOne:(id)sender {
NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"95" ofType:@".wav"];
NSError *activationError = nil;
NSError *audioPlayerInitError = nil;
[[AVAudioSession sharedInstance] setActive: YES error:&activationError];
NSURL *newURL = [NSURL fileURLWithPath:soundFilePath];
AVAudioPlayer *musicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:newURL error:&audioPlayerInitError];
[musicPlayer prepareToPlay];
[musicPlayer setVolume:.8];
[musicPlayer setNumberOfLoops:-1]; // -1 means play indefintely
[musicPlayer setDelegate: self];
[musicPlayer play];
}
why is it crashing?
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由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“*** -[NSURL initFileURLWithPath:]: nil 字符串参数”表示无法找到您引用的文件。指定文件扩展名时不应使用点。
更改
类型：@".wav"到
ofType:@"wav"NSBundle 类参考
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSURL initFileURLWithPath:]: nil string parameter'means that the file you're referencing cannot be found.You should not use the dot when specifying the file extension.
Change
ofType:@".wav"to
ofType:@"wav"NSBundle Class Reference
您应该发布一些控制台输出（可能是堆栈跟踪），这会对我们有更多帮助。
我可以从这段代码中看到崩溃的可能原因：
您在为其添加
@property后是否合成您的按钮？您的 Xcode 项目中是否存在
95.wav（您已导入它）？您正在使用 Interface Builder 吗？如果是这样，请检查您的 IB 项目中是否有旧的 IBOutlets 和 IBActions，因为一旦您重命名了函数或类似的东西，您必然会获得指向旧代码的界面元素。
You should post some console output (possibly a stack trace), it would help us a LOT more.
Possible causes of a crash I can see from this code:
Did you
synthesizeyour button after decalring an@propertyfor it?Does
95.wavexist in your Xcode Project (have you imported it)?Are you using Interface Builder? If so, check your IB project for old IBOutlets and IBActions, as once you rename a function or whatnot, you're bound to get interface elements pointing to old code.