Fixed : 上传PNG问题

src/Library/Upload.php

@@ -101,6 +101,7 @@ class Upload
         'jpe' => 'image/jpeg',
         'jpeg' => 'image/jpeg',
         'jpg' => 'image/jpeg',
+        'png' => 'image/png',
         'js' => 'application/x-javascript',
         'latex' => 'application/x-latex',
         'lha' => 'application/octet-stream',
@@ -359,6 +360,7 @@ class Upload
         }
         $extension = pathinfo($files['name'], PATHINFO_EXTENSION);
         $extension = strtolower($extension);
+        print_r($files);
         if (!in_array($files['type'], $this->mine) || !isset($this->mine[$extension])) {
             $data['code'] = 1407;
             $data['src'] = '';