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[英]How to rotate a single view from portrait to landscape in iOS 6 and above?
[英]How to rotate view from portrait to landscape mode
我在我的應用程序中遇到方向問題。 假設我有兩個視圖(帶有專用的視圖控制器):
它被縮窄並以縱向顯示(如下面的第二幅圖像所示)。 當我將設備水平旋轉並回到縱向時,一切正常。 但是在推送視圖后,它顯示不正確(下圖)。 我怎樣才能解決這個問題?
我使用CustomNavigationController繼承自UINavigatorControler並實現了三種方法:
- (NSUInteger)supportedInterfaceOrientations
{
return [self.topViewController supportedInterfaceOrientations];
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return [self.topViewController preferredInterfaceOrientationForPresentation];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)orientation
{
return [self.topViewController shouldAutorotateToInterfaceOrientation:orientation];
}
在應用程序委托中,我以這種方式初始化控制器:
self.navigationController = [[CustomNavigationController alloc] initWithRootViewController:self.viewController];
[self.window setRootViewController:self.navigationController];
First View控制器通過以下方式實現定位功能:
- (NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskPortrait;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return UIInterfaceOrientationPortrait;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)orientation
{
if (orientation == UIInterfaceOrientationPortrait)
return YES;
return NO;
}
第二個視圖控制器以這種方式實現定位功能:
- (NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscapeRight;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return UIInterfaceOrientationLandscapeRight;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)orientation
{
if (orientation == UIInterfaceOrientationLandscapeRight)
return YES;
return NO;
}
嗨,聲明一個全局變量BOOL isLandScape;
initialize it as isLandScape=NO;
- (NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscapeRight;
}
-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)orientation
{
if ((orientation == UIInterfaceOrientationLandscapeRight)||(orientation == UIInterfaceOrientationLandscapeLeft))
{
isLandScape=YES;
return YES;
}
else
{
isLandScape=NO;
return NO;
}
yourObject.frame=CGRectMake(isLandScape?0:0,isLandScape?0:0,isLandScape?1024:768,isLandScape?768:1024);
}
選中問題“ 如何在iOS 6中處理不同的方向”。有關確實需要的項目示例,請參見此處的答案。
基本上,您需要在視圖控制器(要旋轉的視圖控制器)中嵌入自定義導航控制器。 在此自定義導航控制器中添加以下方法(如果用於橫向,則可以更改為縱向)。
- (NSUInteger)supportedInterfaceOrientations
{
return self.topViewController.supportedInterfaceOrientations;
}
並添加到應該旋轉的視圖控制器中:
- (BOOL)shouldAutorotate
{
return YES;
}
- (NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;
}
確保在項目中啟用了“縱向”,“向右橫向”和“向左橫向”方向。 然后,如果要阻止特定窗口的某些方向:
– application:supportedInterfaceOrientationsForWindow:
為此,您可以使用以下功能:
[[UIDevice currentDevice] performSelector:NSSelectorFromString(@"setOrientation:") withObject:(id)UIInterfaceOrientationPortrait];
您可以在任何地方使用它,但是在應用程序委托中(在didFinishLaunchingWithOptions中 ),我必須放置以下代碼:
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
完美的作品!
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