OC屏幕旋转相关

Posted 2022-11-11 hualuoshuijia

OC屏幕旋转分为两个部分来说，第一个是开启了Device Orientation，开启了的话，自己旋转，没开启需要自己手动处理。因为现在大多数都是用自动布局，这个一般用不到，最近在看AVFoundation相关的东西，需要用到这个，所以总结下

 

 

 第一部分，开启了自动旋转：

• (1)注册屏幕旋转通知：

 [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
    //注册屏幕旋转通知
 [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(orientChange:)
                                                 name:UIDeviceOrientationDidChangeNotification
                                               object:[UIDevice currentDevice]];

- (void)orientChange:(NSNotification *)notification
    UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;
    if(orientation == UIDeviceOrientationPortrait)
         NSLog(@"home在下方");
        self.deviceOrientationBtn.selected = NO;
    else if(orientation == UIDeviceOrientationPortraitUpsideDown)
         NSLog(@"home在上方");
        self.deviceOrientationBtn.selected = NO;
    else if(orientation == UIDeviceOrientationLandscapeLeft)
         NSLog(@"home在右方");
        self.deviceOrientationBtn.selected = YES;
    else if(orientation == UIDeviceOrientationLandscapeRight)
         NSLog(@"home在左方");
        self.deviceOrientationBtn.selected = YES;
    

 如果开启了之后我想手动横屏或者竖屏的话，也可以使用代码强制实现：

[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIInterfaceOrientationLandscapeRight]

 or

 [[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationPortrait] forKey:@"orientation"]

 如果想进入改ViewController就横屏或者竖屏，退出之后恢复的话，可以在

-(void)viewWillAppear:(BOOL)animated

 and

-(void)viewWillDisappear:(BOOL)animated:

 两个方法中实现

 

 

第二部分，没有开启屏幕旋转，需要自己手动做一个假的来代替

（1）横屏设置的方法：

- (void)fullScreenWithDirection:(UIInterfaceOrientation)direction
    if (direction == UIInterfaceOrientationLandscapeLeft)
        [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight animated:YES];
        [UIView animateWithDuration:0.25 animations:^
            self.view.transform = CGAffineTransformMakeRotation(M_PI / 2);
        completion:^(BOOL finished) 
//            [self setFullStatusBarHiddenType:_fullStatusBarHiddenType];
        ];
    else if (direction == UIInterfaceOrientationLandscapeRight) 
        [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeLeft animated:YES];
        [UIView animateWithDuration:0.25 animations:^
            self.view.transform = CGAffineTransformMakeRotation(0);
        completion:^(BOOL finished) 
//            [self setFullStatusBarHiddenType:_fullStatusBarHiddenType];
        ];
    
    self.view.frame = [[UIApplication sharedApplication]keyWindow].bounds;
    [self.view setNeedsLayout];
    [self.view layoutIfNeeded];
    

 

（2）竖屏还原

[UIView animateWithDuration:0.25 animations:^
            self.view.transform = CGAffineTransformMakeRotation(0);
            self.view.frame = [[UIApplication sharedApplication]keyWindow].bounds;
            [self.view setNeedsLayout];
            [self.view layoutIfNeeded];
        completion:^(BOOL finished) 
        ];