Button:修复图标按钮不居中

src/button/Button.jsx

@@ -19,7 +19,7 @@ export default class Button extends Component {
       })} disabled={this.props.disabled} type={this.props.nativeType} onClick={this.onClick.bind(this)}>
         { this.props.loading && <i className="el-icon-loading" /> }
         { this.props.icon && !this.props.loading && <i className={`el-icon-${this.props.icon}`} /> }
-        <span>{this.props.children}</span>
+        { this.props.children && <span>{this.props.children}</span> }
       </button>
     )
   }

src/progress/Progress.jsx

@@ -52,15 +52,19 @@ export default class Progress extends Component {
 
   stroke(): string {
     let ret;
-    switch (this.props.status) {
-      case 'success':
-        ret = '#13ce66';
-        break;
-      case 'exception':
-        ret = '#ff4949';
-        break;
-      default:
-        ret = '#20a0ff';
+    if(this.props.color){
+      ret = this.props.color
+    }else{
+      switch (this.props.status) {
+        case 'success':
+          ret = '#13ce66';
+          break;
+        case 'exception':
+          ret = '#ff4949';
+          break;
+        default:
+          ret = '#20a0ff';
+      }
     }
     return ret;
   }
@@ -97,7 +101,7 @@ export default class Progress extends Component {
           >
             <div
               className="el-progress-bar__inner"
-              style={{ width: `${percentage}%` }}
+              style={{ width: `${percentage}%`, backgroundColor: this.props.color }}
             >
               {showText &&
                 textInside &&
@@ -167,5 +171,6 @@ Progress.propTypes = {
   strokeWidth: PropTypes.number,
   width: PropTypes.number,
   textInside: PropTypes.bool,
-  showText: PropTypes.bool
+  showText: PropTypes.bool,
+  color: PropTypes.string,
 };