修复销售统计页面日期显示7月0号bug review by Author

@@ -8,6 +8,7 @@ import CalendarTrigger from './calendar/CalendarTrigger';
 import CalendarPicker from './calendar/CalendarPicker';
 import ChartView from './chart/ChartView';
 import LoadingIndicator from './indicator/LoadingIndicator';
+import moment from 'moment';
 
 const {
     Component,
@@ -48,7 +49,7 @@ export default class SaleStatistics extends Component {
     constructor(props) {
         super(props);
 
-        let selectdDate = new Date().getFullYear() + '年' + (new Date().getMonth() + 1) + '月' + (new Date().getDate() - 1) + '日';
+        let selectdDate = moment().subtract(1,'days').format('YYYY年MM月DD日');
         this.state = {
             showPicker: false,
             selectdDate,
@@ -111,7 +112,7 @@ export default class SaleStatistics extends Component {
     }
 
 	render() {
-        
+
         return (
             <ScrollView contentContainerStyle={styles.contentContainer}>
                 <CalendarTrigger date={this.state.selectdDate} toogleSelector={this.toogleSelector} />