preferredInterfaceOrientationForPresentation必须返回支持的接口方向

Question

此错误没有意义，因为支持的方向

返回首选方向UIInterfaceOrientationLandscapeRight

//iOS6

-(BOOL)shouldAutorotate
{
    return NO;
}

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

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

错误：

  

由于未捕获的异常而终止应用   'UIApplicationInvalidInterfaceOrientation'，原因：   'preferredInterfaceOrientationForPresentation必须返回支持的   界面方向！'

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，请确保在Info.plist中为您的应用设置了正确的方向，因为您从supportedInterfaceOrientations返回的内容与Info.plist相交，如果找不到常见的那样你就会得到那个错误。

Answer 2

仅当shouldAutorotate设置为YES

时，才会调用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supportedInterfaceOrientations的错误枚举。你需要使用UIInterfaceOrientationMaskLandscapeLeft等（注意中间的单词掩码）

Answer 4

来自文档：

-(NSUInteger)supportedInterfaceOrientations {

    return UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskLandscapeLeft; 
}

请注意，正确的方向是“面具”！ 你试过这个吗？