这怎么可能在iPhone 3.1.3(3g iPhone)上返回non-nil?NSClassFromString(@“MPMoviePlayerViewController”)在3.1.3(iPhone)上返回非零偶数
- (BOOL) isIOS3_2OrAbove
{
Class mplayerControllerClass = NSClassFromString(@"MPMoviePlayerViewController");
if(mplayerControllerClass != nil)
{
NSLog(@"MPMoviePlayerViewController not showing NIL! It is: %@\n",[mplayerControllerClass description]);
return YES;
}
else
{
NSLog(@"MPMoviePlayerViewController is showing NIL!\n");
return NO;
}
}
我得到这个返回:
MPMoviePlayerViewController not showing NIL! It is: MPMoviePlayerViewController
这怎么可能发生呢?我在XCode 3.2.3上通过USB运行设备。
下面是代码调用它:
NSString *movieName = @"litedefault.mp4";
if ([self isIOS3_2OrAbove] == YES)
{
movieName = @"litedefault_3_2.mp4";
}
NSString *moviePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:movieName];
moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:moviePath ]];
moviePlayer.movieControlMode = MPMovieControlModeHidden;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(set_up_views:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];
if ([self isIOS3_2OrAbove] == YES)
{
NSLog(@"IS iOS3.2 or above\n");
moviePlayer.view.frame = CGRectMake(0, 0, 320, 480);
[window addSubview:moviePlayer.view];
[window makeKeyAndVisible];
}
else
{
NSLog(@"IS BELOW iOS3.2\n");
}
[moviePlayer play];
明白,我想在3.2测试任何设备,所以我没有测试UI_USER_INTERFACE_IDIOM
,例如。如您所见,3.2或更高版本需要将MPMoviePlayerController添加到视图。
任何想法?
附录:
看来,我们必须检查一类,它是不是一个私有API(在之前的iPhone OS版本)。我测试了UILongPressGestureRecognizer(它实际上是存在的,但在3.1.3中是私有的),并且得到了非零结果。
OKAY ....所以,这个问题基本上变成了:任何人都知道一个API,我可以检查,不在3.1.3(或更早)?
URGH!
OMGosh!我不认为这会很容易。显示我不应该没有咖啡因编程。谢谢! – Jann 2010-06-24 21:52:23