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deviceorientation 事件在方向传感器输出新数据的时候触发。其数据系传感器与地球坐标系相比较所得，也就是说在设备上可能会采用设备地磁计的数据。详情参考有关方向与运动信息的说明（Orientation and motion data explained）。
常规信息
- 标准
- Orientation
- 接口
- DeviceOrientationEvent
- 冒泡
- 否
- 可取消
- 否
- Target
- DefaultView (
window) - 默认操作
- 无
属性
| Property | Type | Description |
|---|---|---|
target 只读 |
EventTarget |
The event target (the topmost target in the DOM tree). |
type 只读 |
DOMString |
The type of event. |
bubbles 只读 |
Boolean |
Whether the event normally bubbles or not |
cancelable 只读 |
Boolean |
Whether the event is cancellable or not? |
alpha 只读 |
double (float) | The current orientation of the device around the Z axis; that is, how far the device is rotated around a line perpendicular to the device. |
beta 只读 |
double (float) | The current orientation of the device around the X axis; that is, how far the device is tipped forward or backward. |
gamma 只读 |
double (float) | The current orientation of the device around the Y axis; that is, how far the device is turned left or right. |
absolute 只读 |
boolean |
This value is true if the orientation is provided as a difference between the device coordinate frame and the Earth coordinate frame; if the device can't detect the Earth coordinate frame, this value is false. |
例子
if (window.DeviceOrientationEvent) {
window.addEventListener("deviceorientation", function(event) {
// alpha: 在Z轴上的角度
var rotateDegrees = event.alpha;
// gamma: 从左到右
var leftToRight = event.gamma;
// beta: 从前到后的运动
var frontToBack = event.beta;
handleOrientationEvent(frontToBack, leftToRight, rotateDegrees);
}, true);
}
var handleOrientationEvent = function(frontToBack, leftToRight, rotateDegrees) {
// 弹奏一曲夏威夷吉他
};
浏览器兼容性
We're converting our compatibility data into a machine-readable JSON format.
This compatibility table still uses the old format,
because we haven't yet converted the data it contains.
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| 功能 | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| 基本功能支持 | 7.0 | 3.6[1] | ? | ? | ? |
| 功能 | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| 基本功能支持 | 3.0 | 3.6[1] | 未实现 | 12 | 4.2 |
[1] Firefox 3.6, 4, 和 5 支持 mozOrientation 这一类似 DeviceOrientation 的事件。
相关事件
参见
DeviceMotionEventwindow.ondeviceorientation- 检测设备朝向
- 有关方向与运动信息的说明
- 在桌面浏览器中模拟 orientation 事件，基于 orientation-devtool