修改 loading 移位的问题 review by hongmo

@@ -175,7 +175,8 @@ let {width, height} = Dimensions.get('window');
 
 let styles = StyleSheet.create({
     container: {
-        flex: 1,
+        width: width,
+        height: height,
     },
     contentContainer:{
         backgroundColor: 'white',