对于iOS手机：
苹果公司给出了一个枚举，如下：
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typedef NS_ENUM (NSInteger, UIDeviceOrientation) { UIDeviceOrientationUnknown, UIDeviceOrientationPortrait, // 竖向，home键向下 UIDeviceOrientationPortraitUpsideDown, // 竖向，home键向上 UIDeviceOrientationLandscapeLeft, // 横向，home键向右 UIDeviceOrientationLandscapeRight, // 横向，home键向左 UIDeviceOrientationFaceUp, // 屏幕平放，向上 UIDeviceOrientationFaceDown // 屏幕平放，向下 } |
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typedef NS_ENUM(NSInteger, UIInterfaceOrientation) { UIInterfaceOrientationUnknown = UIDeviceOrientationUnknown, UIInterfaceOrientationPortrait = UIDeviceOrientationPortrait, UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown, UIInterfaceOrientationLandscapeLeft = UIDeviceOrientationLandscapeRight, UIInterfaceOrientationLandscapeRight = UIDeviceOrientationLandscapeLeft } |
2、对于获取手机屏幕
（1）
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[[ UIDevice currentDevice ] beginGeneratingDeviceOrientationNotifications ]; dispatch_async ( dispatch_get_main_queue (), ^{ NSLog ( @"=========%zd" ,[[ UIDevice currentDevice ] orientation ]); }); [[ UIDevice currentDevice ] endGeneratingDeviceOrientationNotifications ]; |
（2）
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UIInterfaceOrientation orientation = [ UIApplication sharedApplication ]. statusBarOrientation ; |
3、对于当前手机是不是横屏或者竖屏的判断
（1）判断是否是竖屏
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static inline BOOL UIDeviceOrientationIsPortrait( UIDeviceOrientation orientation) { return ((orientation) == UIDeviceOrientationPortrait || (orientation) == UIDeviceOrientationPortraitUpsideDown ); } |
（2）判断是否是横屏
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static inline BOOL UIDeviceOrientationIsLandscape( UIDeviceOrientation orientation) { return ((orientation) == UIDeviceOrientationLandscapeLeft || (orientation) == UIDeviceOrientationLandscapeRight ); } |
对于Android手机：
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public class SimpleOrientationActivity extends Activity { OrientationEventListener mOrientationListener; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mOrientationListener = new OrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL) { @Override public void onOrientationChanged(int orientation) { Log.v(DEBUG_TAG, "Orientation changed to " + orientation); } }; if (mOrientationListener.canDetectOrientation()) { Log.v(DEBUG_TAG, "Can detect orientation"); mOrientationListener.enable(); } else { Log.v(DEBUG_TAG, "Cannot detect orientation"); mOrientationListener.disable(); } } @Override protected void onDestroy() { super.onDestroy(); mOrientationListener.disable(); } } |
判断手机方向的具体判断代码如下：
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if (OrientationEventListener.ORIENTATION_UNKNOWN == orientation) { return; //手机平放时，检测不到有效的角度 } // 我们只关心 0， 90， 180 ，270 测试发现，很多设备返回的数据是很混乱的，但是这四个度数比较稳定 if((0 == orientation % 90) && (orientation < 360) && (orientation >= 0)) { //只检测是否有四个角度的改变 if (orientation > 350 || orientation < 10) { //0度 orientation = 0; } else if (orientation > 80 && orientation < 100) { //90度 orientation = 90; } else if (orientation > 170 && orientation < 190) { //180度 orientation = 180; } else if (orientation > 260 && orientation < 280) { //270度 orientation = 270; } else { return; } Log.i("MyOrientationDetector ", "onOrientationChanged:" + orientation); } |
对于 Flutter：
使用 native_device_orientation 插件完成相同的检测功能。