fix(Fix KeepAlive not in Provider without prompting):

src/components/Consumer.tsx

 import React from 'react';
 import Comment from './Comment';
 import {LIFECYCLE, ICache, ICacheItem} from './Provider';
-import {warn} from '../utils/debug';
 import findDOMNodeByFiberNode from '../utils/findDOMNodeByFiberNode';
 
 interface IConsumerProps {
@@ -18,15 +17,6 @@ class Consumer extends React.PureComponent<IConsumerProps> {
 
   private identification: string = this.props.identification;
 
-  constructor(props: IConsumerProps, ...args: any) {
-    super(props, ...args);
-    const {cache, setCache, children} = props;
-    if (!cache || !setCache) {
-      warn('[React Keep Alive] You should not use <KeepAlive> outside a <Provider>.');
-    }
-    React.Children.only(children);
-  }
-
   public componentDidMount() {
     const {
       setCache,

src/utils/keepAlive.tsx

@@ -173,6 +173,18 @@ export default function keepAliveDecorator<P = any>(Component: React.ComponentTy
 
     private lifecycle = LIFECYCLE.MOUNTED;
 
+    constructor(props: ITriggerLifecycleContainerProps, ...args: any) {
+      super(props, ...args);
+      const {
+        _keepAliveContextProps: {
+          cache,
+        },
+      } = props;
+      if (!cache) {
+        warn('[React Keep Alive] You should not use <KeepAlive> outside a <Provider>.');
+      }
+    }
+
     public componentDidMount() {
       if (!this.ifStillActivate) {
         this.activate();