Question

我有一个简单的应用程序，包含2个视图。顶视图有一个加速计代表。当用户在屏幕上显示顶视图时摇晃。然后调用pushviewcontroller并出现子视图。问题是当子视图出现时，我摇动它，它仍然捕获摇动动作并导致我错误。所以帮助我。提前谢谢。

- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
const float violence = 1.2;
static BOOL beenhere;
BOOL shake = FALSE;

if (beenhere) return;
beenhere = TRUE;

if (acceleration.x > violence || acceleration.x < (-1* violence))
    shake = TRUE;
if (acceleration.y > violence || acceleration.y < (-1* violence))
    shake = TRUE;
if (acceleration.z > violence || acceleration.z < (-1* violence))
    shake = TRUE;
if (shake) {
    [self playSound:@"suzu"];

    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"noVib"] == NO) {
        AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
    }
    [[UIAccelerometer sharedAccelerometer] setDelegate:nil];
    [self presentModalViewController:mMoviePlayer animated:YES];
    [self play]; 
}

当调用播放方法和视频完成时，将调用pushviewcontroller并显示子视图

下面的

是一个处理所有电影播放器内容的类。

- (void) initPlayer{
if (mMoviePlayer != nil){
    [mMoviePlayer release];
}

mMoviePlayer = [[MoviePlayerViewController alloc] initWithContentURL:[self createURL]];
[[NSNotificationCenter defaultCenter] removeObserver:mMoviePlayer 
                                                name:MPMoviePlayerPlaybackDidFinishNotification object:mMoviePlayer.moviePlayer];
[mMoviePlayer.moviePlayer setShouldAutoplay:NO];
mMoviePlayer.moviePlayer.backgroundView.backgroundColor = [UIColor blackColor];
mMoviePlayer.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
mMoviePlayer.moviePlayer.controlStyle = MPMovieControlStyleNone;

[[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(moviePlayBackDidFinish:) 
                                             name:MPMoviePlayerPlaybackDidFinishNotification 
                                           object:mMoviePlayer.moviePlayer];

[[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(moviePreloadDidFinish:) 
                                             name:MPMoviePlayerLoadStateDidChangeNotification 
                                           object:mMoviePlayer.moviePlayer];

- (void) moviePlayBackDidFinish:(NSNotification*)notification

{

[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:NO];        
[[NSNotificationCenter defaultCenter] removeObserver:self
                                                name:MPMoviePlayerPlaybackDidFinishNotification
                                              object:mMoviePlayer.moviePlayer];
[self dismissModalViewControllerAnimated:YES];
[mMoviePlayer release];
mMoviePlayer = nil;
[self toNext];

}

Answer 1

我想到的第一件事就是跟踪是否按下了mMoviePlayer。

if (shake && mPlayerPushed) {
    [self playSound:@"suzu"];

    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"noVib"] == NO) {
        AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
    }
    [[UIAccelerometer sharedAccelerometer] setDelegate:nil];
    [self presentModalViewController:mMoviePlayer animated:YES];
    [self play]; 
    mPlayerPushed = YES;
}

调用dismissModalViewControllerAnimated后，在moviePlayBackDidFinish方法中

：是的，你应该将mPlayerPushed设置为NO。

或者您可以使用属性模态视图控制器来查看是否显示模态视图。我尚未测试但它应该可以工作。

modalViewController：活动模态视图的控制器 - 即暂时显示在由...管理的视图顶部的视图收件人。（只读）

@property(nonatomic, readonly) UIViewController *modalViewController

所以代替bool mPlayerPushed，你将拥有：

if(shake && something.modalviewController == nil){ present mMoviePlayer }

摇动在其他观点中的动作？

1 个答案: