ios - UIInterfaceOrientation Xcode

Question

我希望我的应用支持 PortraitUpSideDown 方向。 我更改了 info.p 列表以反射(reflect)这一点，并尝试在一个 View 上实现更改作为测试

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

}

但是 View 没有响应。 在应用程序响应之前，我是否需要在所有 View 上实现它？ 我需要更改 Xib 设置吗？

Answer 1

如果您想同时支持横向，请尝试以下操作:

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

或者:

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

或者看起来像您要写的东西:

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