IOS横竖屏显示

待我称王封你为后i 2022-07-16 12:58 248阅读 0赞

由于IOS的横竖屏设置只有在根视图才会有效果。所以 想了一个方法就是找到根视图，添加一个类函数，在任何地方都去设置横竖屏的参数。

下边的例子是指定窗口横屏，其他竖屏显示。

1.找到根视图类，添加属性。我的demo工程根视图是 MyTabBarViewController 所以就在MyTabBarViewController中添加

staticUIInterfaceOrientationMask orientation =UIInterfaceOrientationMaskPortrait;

添加类函数

\+(void)setViewOrientation:(UIInterfaceOrientationMask)orientations\{

orientation = orientations;

重载函数

// 指定支持的旋转情况，须在最底层的viewcontroller实现

\- (UIInterfaceOrientationMask)supportedInterfaceOrientations

returnorientation;

2.在要单独设置横屏的界面添加代码

\[MyTabBarViewControllersetViewOrientation:UIInterfaceOrientationMaskLandscapeRight |UIInterfaceOrientationMaskLandscapeLeft\];

由于设备当时可能是竖屏显示效果，如果没有手机方向改变的事件触发，就算是设置了横竖屏参数也不会横屏显示需要添加代码，去横屏显示

if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)])
        {
            SEL selector = NSSelectorFromString(@"setOrientation:");
            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
            [invocation setSelector:selector];
            [invocation setTarget:[UIDevice currentDevice]];
            int val = UIInterfaceOrientationLandscapeRight;
            [invocation setArgument:&val atIndex:2];
            [invocation invoke];
        }

在该视图消失的时候，需要改回竖屏效果。同理需要添加代码

if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)])
        {
            SEL selector = NSSelectorFromString(@"setOrientation:");
            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
            [invocation setSelector:selector];
            [invocation setTarget:[UIDevice currentDevice]];
            int val = UIInterfaceOrientationPortrait;
            [invocation setArgument:&val atIndex:2];
            [invocation invoke];
        }

综上所述:

- (void)viewDidLoad {
        [super viewDidLoad];
        [self.view setBackgroundColor:[UIColor whiteColor]];
        [MyTabBarViewController setViewOrientation:UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskLandscapeLeft];
        if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)])
        {
            SEL selector = NSSelectorFromString(@"setOrientation:");
            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
            [invocation setSelector:selector];
            [invocation setTarget:[UIDevice currentDevice]];
            int val = UIInterfaceOrientationLandscapeRight;
            [invocation setArgument:&val atIndex:2];
            [invocation invoke];
        }
        // Do any additional setup after loading the view.
    }

-(void)viewWillDisappear:(BOOL)animated{
    
        [MyTabBarViewController setViewOrientation:UIInterfaceOrientationMaskPortrait];
        if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)])
        {
            SEL selector = NSSelectorFromString(@"setOrientation:");
            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
            [invocation setSelector:selector];
            [invocation setTarget:[UIDevice currentDevice]];
            int val = UIInterfaceOrientationPortrait;
            [invocation setArgument:&val atIndex:2];
            [invocation invoke];
        }
    }

[Demo源码][Demo]

[Demo]: http://download.csdn.net/detail/liuyinghui523/9686729