个人中心bug fix review by 盖剑秋

@@ -64,12 +64,14 @@ export default class UserCenterTop extends React.Component {
                         </TouchableOpacity>
                         <Text
                             style={styles.name}
+                            numberOfLines={1}
                         >
                             {nickName}
                         </Text>
 
                         <Text
                             style={styles.sign}
+                            numberOfLines={2}
                         >
                             {sign}
                         </Text>
@@ -83,6 +85,8 @@ export default class UserCenterTop extends React.Component {
 let {width, height} = Dimensions.get('window');
 let navbarHeight = (Platform.OS === 'android') ? 50 : 64;
 let containerHieght = Math.ceil((490 / 750) * width);
+containerHieght = containerHieght < 245 ? 245 : containerHieght;
+
 let styles = StyleSheet.create({
     container: {
         height: containerHieght,
@@ -111,8 +115,8 @@ let styles = StyleSheet.create({
     name: {
         color: 'white',
         textAlign: 'center',
-        margin: 15,
-        marginBottom:10,
+        marginTop: 20,
+        marginBottom: 4,
         fontSize: 14,
         fontFamily: 'Helvetica Light',
     },
@@ -121,6 +125,7 @@ let styles = StyleSheet.create({
         color: 'white',
         textAlign: 'center',
         fontSize: 12,
+        lineHeight: 18,
         fontFamily: 'Helvetica Light',
     },