iOS 强制横屏、部分横屏等功能实践

需求如下：

1.app整体只能竖屏，部分页面才可以横屏
2.app整体只能竖屏，部分页面也是竖屏，但是点击某个按钮可以使当前页面变为横屏，如全屏视频播放键。

需求1解决方法：

1.在targets - general中设置设备支持方向如下，确保设备各个方法均支持

屏幕快照 2016-12-08 下午6.41.26.png

2.在appdelegate的.h文件声明属性来标记当前设备方向

@property (assign , nonatomic)UIInterfaceOrientation interfaceOrientation;

在appdelegate的.m文件中：

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(nullable UIWindow *)window {
    
    if(self.interfaceOrientation == UIInterfaceOrientationUnknown) {
 // 直播间用
        return UIInterfaceOrientationMaskAllButUpsideDown;
    } else if(self.interfaceOrientation == UIInterfaceOrientationLandscapeRight) { 
//交易页面横屏用
        return UIInterfaceOrientationMaskLandscapeRight;
    } else {
        return UIInterfaceOrientationMaskPortrait;
    }
}

3.在需要横屏的ViewController的ViewWillApper方法里面：

 

 Appdelegate *delegate =p.p1[UIApplication sharedApplication].delegate;
delegate.canRotate = YES;

需求2解决方法：

方法1：
1.在targets - general中设置设备支持方向如下，确保整体都是竖屏

屏幕快照 2016-12-08 下午6.30.25.png

2.在横屏（如button点击）事件处，代码如下



- (void)fullScreenBtnAction {
    if (_isNormalOrientation) {   // 如果当前是默认的竖屏
        //注：当前self是UIView对象，如果是VC，则为self.view.....
        self.frame = CGRectMake(0, 0, kScreenSize.height, kScreenSize.width);
        CGRect frame = [UIScreen mainScreen].applicationFrame;
        // transfrom会以当前center为锚点旋转，所以旋转后位置有偏移，需要处理
        CGPoint center = CGPointMake(frame.origin.x + ceil(frame.size.width/2), frame.origin.y + ceil(frame.size.height/2));
        self.center = center;       
        //取状态栏旋转时间
//        CGFloat duration = [UIApplication sharedApplication].statusBarOrientationAnimationDuration;
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration: 0.3];
        self.transform = CGAffineTransformMakeRotation(M_PI_2);
        [UIView commitAnimations];
    } else {
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration: 0.3];
        self.transform = CGAffineTransformIdentity;
        [UIView commitAnimations];
        //_originRect是进入横屏前self的frame
        self.frame = _originRect;
    }
    _isNormalOrientation = !_isNormalOrientation; //更改状态
}

***方法2：
1.在targets - general中设置设备支持方向如下，确保设备各个方法均支持（弃用可不设置）

屏幕快照 2016-12-08 下午6.41.26.png

2.在appdelegate的.h文件声明属性interfaceOrientation标记方向

@property (assign , nonatomic)UIInterfaceOrientation interfaceOrientation;

在appdelegate的.m文件中实现设备方向方法：

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(nullable UIWindow *)window {
    
    if(self.interfaceOrientation == UIInterfaceOrientationUnknown) { // 直播间用
        return UIInterfaceOrientationMaskAllButUpsideDown;
    } else if(self.interfaceOrientation == UIInterfaceOrientationLandscapeRight) { //交易页面横屏用
        return UIInterfaceOrientationMaskLandscapeRight;
    } else {
        return UIInterfaceOrientationMaskPortrait;
    }
}

横竖屏转换：

//转换到竖屏
- (void)rotateToPortraitScreenWithInvocation {
    AppDelegate *delegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    
    SEL selector = NSSelectorFromString(@"setOrientation:");
    
    NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
    
    [invocation setSelector:selector];
    
    [invocation setTarget:[UIDevice currentDevice]];
    
    int val = UIDeviceOrientationPortrait;
    
    [invocation setArgument:&val atIndex:2];
    
    [invocation invoke];
    
    delegate.interfaceOrientation = UIInterfaceOrientationPortrait;
}

//转换到横屏模式
- (void)rotateToLandscapWithIncovation {
    AppDelegate *delegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    
    delegate.interfaceOrientation = UIInterfaceOrientationUnknown;
    
    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];
}

补充后来自己又折腾的几个Demo:
https://github.com/3KK3/AppdelegateMethodHorizDemo/tree/master

iOS 强制横屏、部分横屏等功能实践