preferredInterfaceOrientationForPresentation必须返回支持的接口方向

Question

此错误没有意义,因为UIInterfaceOrientationLandscapeRight支持的方向返回首选方向

//iOS6

-(BOOL)shouldAutorotate
{
    return NO;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return (UIInterfaceOrientationLandscapeRight | UIInterfaceOrientationLandscapeLeft);
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

错误:

由于未捕获的异常'UIApplicationInvalidInterfaceOrientation'而终止应用程序,原因是:'preferredInterfaceOrientationForPresentation必须返回支持的接口方向!'

Answer 1

您的代码应如下所示:

-(BOOL)shouldAutorotate
{
    return NO;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscape;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

此外,请确保Info.plist您已为自己的app设置了正确的方向,因为您返回的supportedInterfaceOrientations内容与之相交,Info.plist如果找不到常见的方向,那么您将收到该错误.

Answer 2

如果shouldAutorotate设置为YES,则仅调用supportedInterfaceOrientations

- (BOOL)shouldAutorotate
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscape;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

对我来说最简单的方法是设置Info.plist

如果您想支持iOS 5,请在视图控制器中使用此代码.

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return UIInterfaceOrientationIsLandscape(interfaceOrientation);
}

Answer 3

这些是错误的枚举supportedInterfaceOrientations.你需要使用UIInterfaceOrientationMaskLandscapeLeft等(注意中间的单词掩码)