著作权归作者所有。
作者：臧其龙
链接：http://www.zhihu.com/question/31376539/answer/51667764
1.如何锁屏或者不支持横屏的时候检测手机方向?
- (void)applicationDidBecomeActive:(UIApplication *)application
{
[_motionManager startDeviceMotionUpdates];
}
- (void)applicationWillResignActive:(UIApplication *)application
{
[_motionManager stopDeviceMotionUpdates];
}
- (UIDeviceOrientation)realDeviceOrientation
{
CMDeviceMotion *deviceMotion = _motionManager.deviceMotion;
double x = deviceMotion.gravity.x;
double y = deviceMotion.gravity.y;
if (fabs(y) >= fabs(x))
{
if (y >= 0)
return UIDeviceOrientationPortraitUpsideDown;
else
return UIDeviceOrientationPortrait;
}
else
{
if (x >= 0)
return UIDeviceOrientationLandscapeRight;
else
return UIDeviceOrientationLandscapeLeft;
}
}
2.如何手动旋转设备?
Objective-C:
NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeLeft];
[[UIDevice currentDevice] setValue:value forKey:@"orientation"];
Swift:
let value = UIInterfaceOrientation.LandscapeLeft.rawValue
UIDevice.currentDevice().setValue(value, forKey: "orientation")
