UIInterfaceOrientation Xcode

Question

我想我的应用程序支持PortraitUpSideDown方向。 我已经改变了info.p名单，以反映这一点，并试图执行一个视图改变为测试

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

} 

但鉴于没有响应。 在应用程序响应之前，我是否需要在所有视图上实现此功能？ 是否有需要更改的Xib设置？

Answer 1

如果你想同时支持横向模式，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); 
} 

或者出头，看起来像你试图写：

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