增加readme的图片处理

Author: CarGuo

RECORD.md

@@ -24,6 +24,35 @@ _debugUltimatePreviousSiblingOf
 GlobalKey可以记录state，但是需要跟随build创建
 https://stackoverflow.com/questions/49862572
 
+```
+if you use AutomaticKeepAliveClientMixin to keep alive page item,you can't write like this:
+
+PageView(
+controller: _pageController,
+onPageChanged: (index) {
+onPageChanged(index);
+},
+children: [NewsList(),Text('page1'),Text('page2'),Text('page3')],
+),
+
+you should write like this:
+
+List _list = [
+NewsList(),
+Text('page1'),
+Text('page2'),
+Text('page3')
+];
+PageView(
+controller: _pageController,
+onPageChanged: (index) {
+onPageChanged(index);
+},
+children:_list,
+), 
+```
+
+
 ### webView
 
 https://github.com/flutter/flutter/issues/19030 没有webview，残念

lib/widget/GSYMarkdownWidget.dart

@@ -108,6 +108,47 @@ class GSYMarkdownWidget extends StatelessWidget {
     return styleSheet;
   }
 
+  _getMarkDownData(String markdownData) {
+    ///优化图片显示
+    RegExp exp = new RegExp(r'!\[.*\]\((.+)\)');
+    Iterable<Match> tags = exp.allMatches(markdownData);
+    String mdDataCode = markdownData;
+    if (tags != null && tags.length > 0) {
+      for (Match m in tags) {
+        String imageMatch = m.group(0);
+        if (imageMatch != null) {
+          String match = m.group(0).replaceAll("\)", "?raw=true)");
+          mdDataCode = mdDataCode.replaceAll(m.group(0), match);
+        }
+      }
+    }
+
+    ///优化img标签的src资源
+    RegExp expImg = new RegExp("<img.*?(?:>|\/>)");
+    RegExp expSrc = new RegExp("src=[\'\"]?([^\'\"]*)[\'\"]?");
+    tags = expImg.allMatches(markdownData);
+    if (tags != null && tags.length > 0) {
+      for (Match m in tags) {
+        String imageTag = m.group(0);
+        String match = imageTag;
+        if (imageTag != null) {
+          Iterable<Match> srcTags = expSrc.allMatches(imageTag);
+          for (Match srcMatch in srcTags) {
+            String srcString = srcMatch.group(0);
+            if (srcString != null && srcString.contains("http")) {
+              String newSrc = srcString.substring(srcString.indexOf("http"), srcString.length - 1) + "?raw=true";
+              match = "![]($newSrc)";
+            }
+          }
+        }
+        mdDataCode = mdDataCode.replaceAll(imageTag, match);
+      }
+    }
+
+
+    return mdDataCode;
+  }
+
   @override
   Widget build(BuildContext context) {
     return Container(
@@ -117,7 +158,7 @@ class GSYMarkdownWidget extends StatelessWidget {
         child: new MarkdownBody(
           styleSheet: _getStyle(context),
           syntaxHighlighter: new GSYHighlighter(),
-          data: markdownData,
+          data: _getMarkDownData(markdownData),
           onTapLink: (String source) {
             CommonUtils.launchUrl(context, source);
           },

pubspec.yaml

@@ -15,7 +15,7 @@ dependencies:
   flutter_redux: ^0.5.2
   device_info: ^0.2.1
   connectivity: ^0.3.1
-  flutter_markdown: ^0.1.5
+  flutter_markdown: ^0.1.6
   url_launcher: ^3.0.3
   share: ^0.5.2
   flutter_spinkit: ^2.0.0