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AngularJS: API: ngTouch/service/$swipe


$swipe

  1. - service in module ngTouch

The $swipe service is a service that abstracts the messier details of hold-and-drag swipe behavior, to make implementing swipe-related directives more convenient.

Requires the ngTouch module to be installed.

$swipe is used by the ngSwipeLeft and ngSwipeRight directives in ngTouch, and by ngCarousel in a separate component.

用法

The $swipe service is an object with a single method: bind. bind takes an element which is to be watched for swipes, and an object with four handler functions. See the documentation for bind below.

方法

  • bind();

    The main method of $swipe. It takes an element to be watched for swipe motions, and an object containing event handlers. The pointer types that should be used can be specified via the optional third argument, which is an array of strings 'mouse' and 'touch'. 默认情况下， $swipe will listen for mouse and touch events.

    The four events are start, move, end, and cancel. start, move, and end receive as a parameter a coordinates object of the form { x: 150, y: 310 }.

    start is called on either mousedown or touchstart. After this event, $swipe is watching for touchmove or mousemove events. These events are ignored until the total distance moved in either dimension exceeds a small threshold.

    Once this threshold is exceeded, either the horizontal or vertical delta is greater.

    • If the horizontal distance is greater, this is a swipe and move and end events follow.
    • If the vertical distance is greater, this is a scroll, and we let the browser take over. A cancel event is sent.

    move is called on mousemove and touchmove after the above logic has determined that a swipe is in progress.

    end is called when a swipe is successfully completed with a touchend or mouseup.

    cancel is called either on a touchcancel from the browser, or when we begin scrolling as described above.


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