UIInterfaceOrientation Xcode

Question

我希望我的应用程序支持PortraitUpSideDown定位。我已经更改了info.p列表以反映这一点，并尝试将更改作为测试在一个视图上实现

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
    return YES;
    return (interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown);
    return YES;

}

但这种观点没有做出回应。在应用程序响应之前，我需要在所有视图上实现这一点吗？是否有需要更改的Xib设置？

Answer 1

如果您想同时支持这两种横向，请尝试以下方法：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown);
}

或者：

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

或者看起来像你想要写的东西：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    if (interfaceOrientation == UIInterfaceOrientationPortrait) {
        return YES;
    }
    if (interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) {
        return YES;
    }
    return NO;
}