如何在iPhone中纵向/横向锁定屏幕？ [英] How to lock screen in portrait/landscape in iPhone?

问题描述

我的应用程序支持所有方向，但在少数情况下我想锁定屏幕

纵向/横向模式。

在我的应用程序中，我有两种pdf文档。

一个是纵向文档，另一个是横向文档。

我想仅在纵向视图中打开纵向文档，并且仅在

横向视图中打开横向文档。

我想这样做：如果我的应用程序在横向视图中打开，我点击

纵向文档，因此它必须在纵向视图中旋转如果

我的应用程序在纵向视图中打开，当我点击横向文档时

必须旋转或者它必须只在横向打开文件。

希望我让你们明白原谅我的英语希望你明白我想要的东西

需要你的帮助。

提前谢谢

这是我的一些代码：

   - （void）viewDidLoad 
 {
 [super viewDidLoad]; 
 
 UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation]; 
 
 if（orientation == UIInterfaceOrientationPortrait || orientation == 
 UIInterfaceOrientationPortraitUpsideDown）{
 
 NSLog（@Portrait）; 
 if（[orientationObject isEqualToString：@p]）{
 //如果文件是肖像
 pdfScrollViewFrame = CGRectMake（-0.0，-80.0,770.0,1085.0）; 
} 
 else {
 //如果文件是横向的
 pdfScrollViewFrame = CGRectMake（-0.0，-40.0,770.0,1130.0）; 
} 
} 
 else {
 
 NSLog（@Landscape）; 
 
 if（[orientationObject isEqualToString：@p]）{
 //如果文件是肖像
 pdfScrollViewFrame = CGRectMake（65.0，-80.0,620.0,1110.0）; 
} 
 else {
 //如果文档是横向的
 pdfScrollViewFrame = CGRectMake（0.0，-40.0,740.0,1070.0）; 
} 
} 
  

解决方案

iOS6 +，您可以将其添加到您的控制器：

   - （BOOL）shouldAutorotate {
 YES; 
} 
 
  - （NSUInteger）supportedInterfaceOrientations {
 
 if（< PDF is portrait>）
返回UIInterfaceOrientationMaskPortrait; 
 if（< PDF is landscape>）
返回UIInterfaceOrientationMaskLandscape; 
 
返回UIInterfaceOrientationMaskAll; 
 
} 
  

希望这有帮助。

编辑：

我不确定您是否需要手动旋转PDF以获得所需的结果。在这种情况下，您可以尝试使用以下内容：

   - （void）willRotateToInterfaceOrientation：（UIInterfaceOrientation）toOrientation 
 duration： （NSTimeInterval）持续时间{
 
 if（toOrientation == UIInterfaceOrientationMaskLandscape）
 pdfScrollViewFrame.transform = CGAffineTransformMakeRotation（M_PI / 2）; 
 
 ... //处理所有其他情况
} 
  

为了仅在 viewDidAppear 之后锁定旋转，我会执行以下操作：

  @interface ... 
 ... 
 @property（nonatomic）BOOL isRotationLocked; 
 ... 
 @end 
 
 @ implementation ... 
 ... 
  - （void）viewDidAppear：（BOOL）animated {
 ... 
 self.isRotationLocked = YES; 
} 
 
  - （BOOL）shouldAutorotate {
 YES; 
} 
 
  - （NSUInteger）supportedInterfaceOrientations {
 
 if（self.isRotationLocked）{
 if（< PDF is portrait>）
返回UIInterfaceOrientationMaskPortrait; 
 if（< PDF is landscape>）
返回UIInterfaceOrientationMaskLandscape; 
} 
返回UIInterfaceOrientationMaskAll; 
 
} 
 ... 
  

My Application supports all orientation but in few cases i want to lock the screen in

portrait/landscape mode.

In my Application i have two kind of pdf document.

one is in portrait document and other is landscape document .

i want to open portrait document in portrait view only, and landscape document in

landscape view only.

i want to do like this: if my application is open in landscape view and i click on the

portrait document so it must rotate in portrait view and same like this for landscape if

my application is open in portrait view and when i click on the landscape document it

must be rotate or it must open the document in landscape only.

hope i make you guys clear pardon my english hope you understand what i want please

need your help .

Thank you in advance

here is my some code :

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

  if (orientation == UIInterfaceOrientationPortrait || orientation == 
         UIInterfaceOrientationPortraitUpsideDown) {

            NSLog(@"Portrait");
            if ([orientationObject isEqualToString:@"p"]) {
               //If the document is portrait
                pdfScrollViewFrame = CGRectMake(-0.0, -80.0, 770.0, 1085.0);
            }
            else{
                // If the document is landscape
                pdfScrollViewFrame = CGRectMake(-0.0, -40.0, 770.0, 1130.0);
            }
        }
        else{

           NSLog(@"Landscape");

            if ([orientationObject isEqualToString:@"p"]) {
             //If the document is portrait
               pdfScrollViewFrame = CGRectMake(65.0, -80.0, 620.0, 1110.0);
            }
            else{
                //if the document is landscape
                pdfScrollViewFrame = CGRectMake(0.0, -40.0, 740.0, 1070.0);
            }
        }

解决方案

For iOS6+, you could add this to your controller:

- (BOOL)shouldAutorotate {
    YES;
}

- (NSUInteger)supportedInterfaceOrientations {

  if (<PDF is portrait>)
    return UIInterfaceOrientationMaskPortrait;
  if (<PDF is landscape>)
    return UIInterfaceOrientationMaskLandscape;

  return UIInterfaceOrientationMaskAll;

}

Hope this helps.

EDIT:

I am not sure if you need to manually rotate the PDF to get the results you want. In this case you might try with something like:

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toOrientation
                            duration:(NSTimeInterval)duration {

    if (toOrientation == UIInterfaceOrientationMaskLandscape)
        pdfScrollViewFrame.transform = CGAffineTransformMakeRotation(M_PI/2);

    … // handle all other cases here
}

In order to only lock rotation after viewDidAppear, I would do following:

@interface…
…
   @property (nonatomic) BOOL isRotationLocked;
…
@end

@implementation…
…
- (void)viewDidAppear:(BOOL)animated {
  …
  self.isRotationLocked = YES;
}

- (BOOL)shouldAutorotate {
    YES;
}

- (NSUInteger)supportedInterfaceOrientations {

  if (self.isRotationLocked) {
    if (<PDF is portrait>)
      return UIInterfaceOrientationMaskPortrait;
    if (<PDF is landscape>)
      return UIInterfaceOrientationMaskLandscape;
  }
  return UIInterfaceOrientationMaskAll;

}
…

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