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PositionOptions 是一个作为 Geolocation.getCurrentPosition()方法 以及 Geolocation.watchPosition() 方法参数的选项,此选项含有3种可以设置的属性。

Properties

The PositionOptions interface doesn't inherit any property.

PositionOptions.enableHighAccuracy
Is a Boolean that indicates the application would like to receive the best possible results. If true and if the device is able to provide a more accurate position, it will do so. Note that this can result in slower response times or increased power consumption (with a GPS chip on a mobile device for example). On the other hand, if false, the device can take the liberty to save resources by responding more quickly and/or using less power. Default: false.
PositionOptions.timeout
Is a positive long value representing the maximum length of time (in milliseconds) the device is allowed to take in order to return a position. The default value is Infinity, meaning that getCurrentPosition() won't return until the position is available.
PositionOptions.maximumAge
Is a positive long value indicating the maximum age in milliseconds of a possible cached position that is acceptable to return. If set to 0, it means that the device cannot use a cached position and must attempt to retrieve the real current position. If set to Infinity the device must return a cached position regardless of its age. Default: 0.

Methods

The PositionOptions interface neither implements, nor inherits any method.

Specifications

Specification Status Comment
Geolocation API
PositionOptions
Recommendation Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 5 3.5 (1.9.1) 9 10.60
未实现 15.0
16.0
5
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? 4.0 (4) ? 10.60 ?

See also

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