加速度计-摇晃后崩溃-可可粉 [英] Accelerometer - Crashing after shaken - Cocoa Touch
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问题描述
您好
我想拥有它,所以一旦用户摇动设备即可。我想要播放声音。但是,一旦我摇晃设备使其崩溃,这就是我使用的代码
Hello I'm trying to have it, so once the user shakes the device. I want a sound to play. However once I shake the device it crashes, this is the code which I have used
- (BOOL)canBecomeFirstResponder
{
return YES;
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self becomeFirstResponder];
}
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
{
if(motion == UIEventSubtypeMotionShake)
{
NSString *path = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"wav"];
if (theAudio) [theAudio release];
NSError *error = nil;
theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:&error];
if (error)
NSLog(@"%@",[error localizedDescription]);
theAudio.delegate = self;
[theAudio play];
}
}
这是崩溃报告
2011-04-19 19:25:44.337 iApp[314:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSURL initFileURLWithPath:]: nil string parameter'
*** Call stack at first throw:
(
0 CoreFoundation 0x00fc3be9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x00db85c2 objc_exception_throw + 47
2 CoreFoundation 0x00f7c628 +[NSException raise:format:arguments:] + 136
3 CoreFoundation 0x00f7c59a +[NSException raise:format:] + 58
4 Foundation 0x00055b12 -[NSURL(NSURL) initFileURLWithPath:] + 90
5 Foundation 0x00055aa0 +[NSURL(NSURL) fileURLWithPath:] + 72
6 iApp 0x0000305d -[AppViewController motionEnded:withEvent:] + 256
7 UIKit 0x002dc07c -[UIWindow sendEvent:] + 350
8 UIKit 0x002bf37a -[UIApplication sendEvent:] + 447
9 UIKit 0x002c311b _UIApplicationHandleEvent + 1921
10 GraphicsServices 0x017daa36 PurpleEventCallback + 1550
11 CoreFoundation 0x00fa5064 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
12 CoreFoundation 0x00f056f7 __CFRunLoopDoSource1 + 215
13 CoreFoundation 0x00f02983 __CFRunLoopRun + 979
14 CoreFoundation 0x00f02240 CFRunLoopRunSpecific + 208
15 CoreFoundation 0x00f02161 CFRunLoopRunInMode + 97
16 GraphicsServices 0x017d9268 GSEventRunModal + 217
17 GraphicsServices 0x017d932d GSEventRun + 115
18 UIKit 0x002c842e UIApplicationMain + 1160
19 iApp 0x0000295c main + 102
20 iApp 0x000028ed start + 53
)
terminate called after throwing an instance of 'NSException'
推荐答案
鉴于崩溃报告原因:
reason: '*** -[NSURL initFileURLWithPath:]: nil string parameter'
以及应用程序代码中最后执行的行:
along with the last executed line in your app's code:
6 iApp 0x0000305d -[AppViewController motionEnded:withEvent:] + 256
我认为您的sound.wav文件丢失了:
I would think that your sound.wav file is missing:
NSString *path = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"wav"];
我建议您确保:
- sound.wav文件在您的项目中
- 大小写敏感地拼写为 sound.wav
希望这会有所帮助。
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