如何在 iOS 中禁用特定方向
How to disable specific orientation in iOS
我想在某些视图中禁用横向。
我已经覆盖了以下两个方法,但是这些方法不会随时调用。
- (NSUInteger) supportedInterfaceOrientations {
return UIInterfaceOrientationMaskPortrait;
}
- (UIInterfaceOrientation) preferredInterfaceOrientationForPresentation {
return UIInterfaceOrientationPortrait;
}
我错过了什么吗?
请帮助我。
查看 this 答案。这家伙可能已经非常详细地解释了代表们。
也试试,
- (void)awakeFromNib
{
isShowingLandscapeView = NO;
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(orientationChanged:)
name:UIDeviceOrientationDidChangeNotification
object:nil];
}
- (void)orientationChanged:(NSNotification *)notification
{
UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
if (UIDeviceOrientationIsLandscape(deviceOrientation) &&
!isShowingLandscapeView)
{
[self performSegueWithIdentifier:@"DisplayAlternateView" sender:self];
isShowingLandscapeView = YES;
}
else if (UIDeviceOrientationIsPortrait(deviceOrientation) &&
isShowingLandscapeView)
{
[self dismissViewControllerAnimated:YES completion:nil];
isShowingLandscapeView = NO;
}
}
您是否在代码中使用了以下方法,没有这个 supportedInterfaceOrientations 将不会被调用
-(BOOL) shouldAutorotate
{
return YES;
}
创建 UINavigationController 的子class 并按照以下方式覆盖这些方法:
- (NSUInteger)supportedInterfaceOrientations
{
if([self.topViewController respondsToSelector:@selector(supportedInterfaceOrientationsForThisContorller)])
{
return(NSInteger)[self.topViewController performSelector:@selector(supportedInterfaceOrientationsForThisContorller) withObject:nil];
}
return UIInterfaceOrientationPortrait | UIInterfaceOrientationLandscapeLeft | UIInterfaceOrientationLandscapeRight;
}
- (BOOL)shouldAutorotate
{
if([self.visibleViewController respondsToSelector:@selector(shouldAutorotateNow)])
{
BOOL autoRotate = (BOOL)[self.visibleViewController
performSelector:@selector(shouldAutorotateNow)
withObject:nil];
return autoRotate;
}
return YES;
}
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return UIInterfaceOrientationPortrait;
}
并在您的 UIViewController class 中使用以下方法,您只想设置纵向方向
- (NSUInteger) supportedInterfaceOrientationsForThisContorller {
// Return a bitmask of supported orientations. If you need more,
// use bitwise or (see the commented return).
return UIInterfaceOrientationMaskPortrait;
// return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown;
}
-(BOOL)shouldAutorotateNow
{
return YES;
}
我想在某些视图中禁用横向。
我已经覆盖了以下两个方法,但是这些方法不会随时调用。
- (NSUInteger) supportedInterfaceOrientations {
return UIInterfaceOrientationMaskPortrait;
}
- (UIInterfaceOrientation) preferredInterfaceOrientationForPresentation {
return UIInterfaceOrientationPortrait;
}
我错过了什么吗? 请帮助我。
查看 this 答案。这家伙可能已经非常详细地解释了代表们。
也试试,
- (void)awakeFromNib
{
isShowingLandscapeView = NO;
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(orientationChanged:)
name:UIDeviceOrientationDidChangeNotification
object:nil];
}
- (void)orientationChanged:(NSNotification *)notification
{
UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
if (UIDeviceOrientationIsLandscape(deviceOrientation) &&
!isShowingLandscapeView)
{
[self performSegueWithIdentifier:@"DisplayAlternateView" sender:self];
isShowingLandscapeView = YES;
}
else if (UIDeviceOrientationIsPortrait(deviceOrientation) &&
isShowingLandscapeView)
{
[self dismissViewControllerAnimated:YES completion:nil];
isShowingLandscapeView = NO;
}
}
您是否在代码中使用了以下方法,没有这个 supportedInterfaceOrientations 将不会被调用
-(BOOL) shouldAutorotate {
return YES;
}
创建 UINavigationController 的子class 并按照以下方式覆盖这些方法:
- (NSUInteger)supportedInterfaceOrientations
{
if([self.topViewController respondsToSelector:@selector(supportedInterfaceOrientationsForThisContorller)])
{
return(NSInteger)[self.topViewController performSelector:@selector(supportedInterfaceOrientationsForThisContorller) withObject:nil];
}
return UIInterfaceOrientationPortrait | UIInterfaceOrientationLandscapeLeft | UIInterfaceOrientationLandscapeRight;
}
- (BOOL)shouldAutorotate
{
if([self.visibleViewController respondsToSelector:@selector(shouldAutorotateNow)])
{
BOOL autoRotate = (BOOL)[self.visibleViewController
performSelector:@selector(shouldAutorotateNow)
withObject:nil];
return autoRotate;
}
return YES;
}
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return UIInterfaceOrientationPortrait;
}
并在您的 UIViewController class 中使用以下方法,您只想设置纵向方向
- (NSUInteger) supportedInterfaceOrientationsForThisContorller {
// Return a bitmask of supported orientations. If you need more,
// use bitwise or (see the commented return).
return UIInterfaceOrientationMaskPortrait;
// return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown;
}
-(BOOL)shouldAutorotateNow
{
return YES;
}