javascript - 你能从安装了angular-touch的javascript中检测到双击吗

Question

我正在尝试在触摸设备上分配一个手势来“删除照片”，双击是有意义的。是否有 Angular 友好的方法来检测 double-tap，甚至是来自 javascript 的 long-tap？ Angular-touch 不支持开箱即用。

PS:我知道我可以使用 hammer.js，但如果可以避免，我宁愿不加载另一个库。 angular-carousel 已经加载了 angular-touch

Answer 1

我浏览了 angular-touch.js 并添加了这个:

  longtapHandler = $parse(attr.ngLongtap),

这个:

  /*
   * add longtap event
   */
  if (tapping && diff > (1 * TAP_DURATION) && dist < MOVE_TOLERANCE) {
    // Call preventGhostClick so the clickbuster will catch the corresponding click.
    preventGhostClick(x, y);

    // Blur the focused element (the button, probably) before firing the callback.
    // This doesn't work perfectly on Android Chrome, but seems to work elsewhere.
    // I couldn't get anything to work reliably on Android Chrome.
    if (tapElement) {
      tapElement.blur();
    }

    if (!angular.isDefined(attr.disabled) || attr.disabled === false) {
      element.triggerHandler('longtap', [event]);
    }
  }

还有这个

element.on('longtap', function(event, touchend) {
  scope.$apply(function() {
    longtapHandler(scope, {$event: (touchend || event)});
  });
});

它似乎工作正常。