[英]Method does not invoked on Mac OS X 10.8 Mountain Lion
I'm trying to create small application which can be used over Mac OS X 10.8. 我正在尝试创建可在Mac OS X 10.8上使用的小型应用程序。
On Mac OS X Mavericks and on Mac OS X Yosemite, my application work well but on Mac OS X 10.8, main method of my application does not invoked. 在Mac OS X Mavericks和Mac OS X Yosemite上,我的应用程序运行良好,但在Mac OS X 10.8上,未调用应用程序的主要方法。 To be exact, the method seems to be invoked momentary, but soon after killed with alert sound. 确切地说,该方法似乎是瞬时调用的,但是在被警报声杀死后不久。 I know that Mac OS X 10.8 is a bit strict than the OS after it. 我知道Mac OS X 10.8比之后的OS严格一些。 But I think there are something wrong with my code which I can't find out. 但是我认为我的代码出了点问题,我找不到。
My main method is OK because if it is called directly, it works fine without any problem. 我的主要方法是可以的,因为如果直接调用它,它将正常工作而不会出现任何问题。 But if I call it in the method of notification selector, the problem occur. 但是,如果我在通知选择器的方法中调用它,则会出现问题。
Here's my code. 这是我的代码。 I appreciate any kind of suggestion,thanks. 我感谢任何建议,谢谢。
- (IBAction)startButton:(id)sender {
NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
if ( [[defaults objectForKey:@"aBookMark"] length] == 0 ) {
[self getAudioCDPath];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(runEncodeAsyncWithNotify:)
name:NSWindowDidEndSheetNotification
object:self.window];
} else {
[self runEncodeAsync];
}
}
/* This method have problem */
-(void)runEncodeAsyncWithNotify:(NSNotification *)notification {
[[NSNotificationCenter defaultCenter] removeObserver:self
name:NSWindowDidEndSheetNotification
object:self.window];
encodingFlag = YES;
[_start setEnabled: NO];
[_stop setEnabled: YES];
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[queue addOperationWithBlock:^{
[self encodeWithLAME];
}];
}
/* This method does not have any problem */
-(void)runEncodeAsync {
encodingFlag = YES;
[_start setEnabled: NO];
[_stop setEnabled: YES];
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[queue addOperationWithBlock:^{
[self encodeWithLAME];
}];
}
My mistake is to use NSWindowDidEndSheetNotification
as sheet close notification. 我的错误是使用NSWindowDidEndSheetNotification
作为工作表关闭通知。 [self getAudioCDPath]
is a method which presents sheet OpenPanel and this have completionHandler:
block in itself. [self getAudioCDPath]
是一种呈现表单OpenPanel的方法,它本身具有completeHandler completionHandler:
块。 Since what I'd like to do is just to invoke [self runEncodeAsync]
, I should write it in the completionHandler:
block. 因为我想做的只是调用[self runEncodeAsync]
,所以我应该将它写在completionHandler:
块中。 No need to use NSWindowDidEndSheetNotification
. 无需使用NSWindowDidEndSheetNotification
。
So, here's modified code of getAudioCDPath
. 因此,这是getAudioCDPath
的修改后的代码。 Sorry I don't show it in the question. 抱歉,我没有在问题中显示它。
[aPanel beginSheetModalForWindow:self.window completionHandler:^(NSInteger result) {
if (result == NSFileHandlingPanelOKButton) {
NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
NSURL *aDirURL = [[aPanel URLs] objectAtIndex:0];
NSData *bookmark = nil;
NSError *error = nil;
bookmark = [aDirURL bookmarkDataWithOptions:NSURLBookmarkCreationWithSecurityScope
includingResourceValuesForKeys:nil
relativeToURL:nil
error:&error];
if (error) {
NSLog(@"Error creating bookmark for URL (%@): %@", aDirURL, error);
}
[defaults setObject:bookmark forKey:@"aBookMark"];
[self runEncodeAsync]; // I added this to invoke main method!!
}
}];
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