ionic开发中点击input时键盘自动弹出

.directive('focusInput', ['$ionicScrollDelegate', '$window', '$timeout', '$ionicPosition', function ($ionicScrollDelegate, $window, $timeout, $ionicPosition) { 
  return { 
    restrict: 'A', 
    scope: false, 
    link: function ($scope, iElm, iAttrs, controller) { 
      if (ionic.Platform.isIOS()) { 
        iElm.on('focus', function () { 
          var top = $ionicScrollDelegate.getScrollPosition().top; 
          var eleTop = ($ionicPosition.offset(iElm).top) / 2 
          var realTop = eleTop + top; 
          $timeout(function () { 
            if (!$scope.$last) { 
              $ionicScrollDelegate.scrollTo(0,realTop); 
            } else { 
              try { 
                var aim = angular.element(document).find('.scroll') 
                aim.css('transform', 'translate3d(0px,' + '-' + realTop + 'px, 0px) scale(1)'); 
                $timeout(function () { 
                  iElm[0].focus(); 
                  console.log(2); 
                }, 100) 
              } catch (e) { 
              } 
            } 
          }, 500) 
        }) 
      } 
    } 
  } 
}])