。:：更新的答案-7月14日::。
检查以下简单指令：
app.directive('price', [function () { return { require: 'ngModel', link: function (scope, element, attrs, ngModel) { attrs.$set('ngTrim', "false"); var formatter = function(str, isNum) { str = String( Number(str || 0) / (isNum?1:100) ); str = (str=='0'?'0.0':str).split('.'); str[1] = str[1] || '0'; return str[0].replace(/(d)(?=(ddd)+(?!d))/g, '$1,') + '.' + (str[1].length==1?str[1]+'0':str[1]); } var updateView = function(val) { scope.$applyAsync(function () { ngModel.$setViewValue(val || ''); ngModel.$render(); }); } var parseNumber = function(val) { var modelString = formatter(ngModel.$modelValue, true); var sign = { pos: /[+]/.test(val), neg: /[-]/.test(val) } sign.has = sign.pos || sign.neg; sign.both = sign.pos && sign.neg; if (!val || sign.has && val.length==1 || ngModel.$modelValue && Number(val)===0) { var newVal = (!val || ngModel.$modelValue && Number()===0?'':val); if (ngModel.$modelValue !== newVal) updateView(newVal); return ''; } else { var valString = String(val || ''); var newSign = (sign.both && ngModel.$modelValue>=0 || !sign.both && sign.neg?'-':''); var newVal = valString.replace(/[^0-9]/g,''); var viewVal = newSign + formatter(angular.copy(newVal)); if (modelString !== valString) updateView(viewVal); return (Number(newSign + newVal) / 100) || 0; } } var formatNumber = function(val) { if (val) { var str = String(val).split('.'); str[1] = str[1] || '0'; val = str[0] + '.' + (str[1].length==1?str[1]+'0':str[1]); } return parseNumber(val); } ngModel.$parsers.push(parseNumber); ngModel.$formatters.push(formatNumber); } };}]);并像这样使用它：
<input type="text" ng-model="number" price >
在此
PLUNKER中实时观看（7月14日）
