通过CoreMotion检测震动手势 [英] Detecting Shake Gesture by CoreMotion
本文介绍了通过CoreMotion检测震动手势的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想使用iOS 7的coreMotion框架检测设备抖动.有人可以帮助我实现这一点吗?
I want to detect device shake using coreMotion framework for iOS 7. Can anyone help me out how to do this ?
我在viewDidAppear中写了下面描述的代码
I wrote code described below in my viewDidAppear
CMMotionManager *motionManager = [[CMMotionManager alloc] init];
motionManager.deviceMotionUpdateInterval = 1.0/60.0;
__block double myAcceleration;
[motionManager startDeviceMotionUpdatesToQueue:[NSOperationQueue mainQueue]
withHandler:^(CMDeviceMotion *motion, NSError *error)
{
myAcceleration = motion.userAcceleration.y;
CATransform3D transform;
transform = CATransform3DMakeRotation(
motion.attitude.pitch, 1, 0, 0);
transform = CATransform3DRotate(transform,
motion.attitude.roll, 0, 1, 0);
transform = CATransform3DRotate(transform,
motion.attitude.yaw, 0, 0, 1);
}
];
但没有检测到抖动.
推荐答案
#define accelerationThreshold 0.30
- (void)motionMethod:(CMDeviceMotion *)deviceMotion
{
CMMotionManager *motionManager = [[CMMotionManager alloc] init];
CMAcceleration userAcceleration = deviceMotion.userAcceleration;
if (fabs(userAcceleration.x) > accelerationThreshold || fabs(userAcceleration.y) > accelerationThreshold || fabs(userAcceleration.z) > accelerationThreshold)
{
float sensitivity = 1;
float x1 = 0, x2 = 0, y1 = 0, y2 = 0, z1 = 0, z2 = 0;
double totalAccelerationInXY = sqrt(userAcceleration.x * userAcceleration.x +
userAcceleration.y * userAcceleration.y);
if (0.85 < totalAccelerationInXY < 3.45) {
x1 = userAcceleration.x;
y1 = userAcceleration.y;
z1 = userAcceleration.z;
float change = fabs(x1-x2+y1-y2+z1-z2);
if (sensitivity < change) {
// print change in position in coordinates.
NSLog (@"total=%f x=%f y=%f z=%f timeStamp:%f, UpTime:%f", totalAccelerationInXY, userAcceleration.x, userAcceleration.y, userAcceleration.z, deviceMotion.timestamp, [[NSProcessInfo processInfo] systemUptime]);
x2 = x1;
y2 = y1;
z2 = z1;
}
}
}
}
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