ios - preferredInterfaceOrientationForPresentation 必须返回受支持的界面方向

Question

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

//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：“preferredInterfaceOrientationForPresentation 必须返回受支持的界面方向！”

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，请确保在您Info.plist的应用程序中设置了正确的方向，因为您返回的方向与该方向supportedInterfaceOrientations相交，Info.plist如果它找不到一个共同的方向，那么您将收到该错误。

Answer 2

仅当 shouldAutorotate 设置为 YES 时才调用supportedInterfaceOrientations

- (BOOL)shouldAutorotate
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscape;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

对我来说最简单的方法就是设置 Info.plist

如果您想支持 iOS 5，请在您的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，等等（注意中间的字掩码）

Answer 4

从文档中：

-(NSUInteger)supportedInterfaceOrientations {

    return UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskLandscapeLeft; 
}

请注意，正确的方向是“面具”！你试过这个吗？