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) {
}];