iOS8 横竖屏控制

公司App里面有个需求,即所有界面都是竖屏,且不允许横屏切换,唯独有一个播放视频的界面允许横屏,大家都知道视频播放适配最大的播放屏幕那样是最好的。从网上多方查找资料,查到了这么一篇文章:

[http://simayang.com/archives/405.html]

(IOS横竖屏控制与事件处理)
最终,根据此需求处理如下: 首先,确保App本身应该允许转屏切换:
如图所示
再次,我的App里面UITabBarController是主控制器,所以首先创建一个UITabBarController的子类,并设定允许转屏:

#pragma mark 转屏方法重写
-(UIInterfaceOrientationMask)supportedInterfaceOrientations
{
    return [self.viewControllers.firstObject supportedInterfaceOrientations];
}

-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return [self.viewControllers.firstObject preferredInterfaceOrientationForPresentation];
}

-(BOOL)shouldAutorotate{
    return self.viewControllers.firstObject.shouldAutorotate;
}
 接着,tabbarController里面每个子控制器都是UINavigationController进行界面push切换的,所以首先创建一个UINavigationController的子类,并设定允许转屏:
#pragma mark 转屏方法重写
-(UIInterfaceOrientationMask)supportedInterfaceOrientations
{
    return [self.viewControllers.lastObject supportedInterfaceOrientations];
}

-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return [self.viewControllers.lastObject preferredInterfaceOrientationForPresentation];
}

-(BOOL)shouldAutorotate{
    return self.visibleViewController.shouldAutorotate;
}

最后,在你不想转屏切换的ViewController上重写以下方法:

#pragma mark 转屏方法 不允许转屏
-(UIInterfaceOrientationMask)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait ;
}
- (BOOL)shouldAutorotate
{
    return NO;
}
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortrait;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
    return NO;
}

在你想转屏切换的ViewController上可以照这样重写(允许左右横屏以及竖屏):

- (BOOL)shouldAutorotate {
    return YES;
}
-(UIInterfaceOrientationMask)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskAll;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortrait;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return YES;
}

另外,在ViewController中对于转屏事件可以参见下面的方法进行捕获:

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
    [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {
        //计算旋转之后的宽度并赋值
        CGSize screen = [UIScreen mainScreen].bounds.size;
        //界面处理逻辑
        self.lineChartView.frame = CGRectMake(0, 30, screen.width, 200.0);
        //动画播放完成之后
        if(screen.width > screen.height){
            NSLog(@"横屏");
        }else{
            NSLog(@"竖屏");
        }
    } completion:^(id<UIViewControllerTransitionCoordinatorContext> context) {
        NSLog(@"动画播放完之后处理");
    }];
}

区分当前屏幕是否为横竖屏的状态,其实通过判断当前屏幕的宽高来决定是不是横屏或者竖屏:

竖屏时:宽<高

横屏时:宽>高

以上在IOS8、9中测试通过

参考链接

http://simayang.com/archives/405.html

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转载自blog.csdn.net/guo_hongjun1611/article/details/50470559