美化UI界面：添加新布局和样式

app.py

@@ -6,6 +6,7 @@ import numpy as np
 from fastapi import FastAPI, File, UploadFile
 from PIL import Image
 import io
+import os
 
 # 初始化 FastAPI
 app = FastAPI()
@@ -117,15 +118,25 @@ with gr.Blocks(theme=theme) as demo:
         outputs=[input_image, output_image, result_text],
     )
     
-    # 添加示例
-    if os.path.exists("example1.jpg") and os.path.exists("example2.jpg"):
-        gr.Examples(
-            examples=["example1.jpg", "example2.jpg"],
-            inputs=input_image,
-            outputs=[output_image, result_text],
-            fn=detect_objects,
-            cache_examples=True,
-        )
+    # 修改示例部分的代码
+    # 使用try-except来处理示例图片
+    try:
+        examples = []
+        if os.path.exists("example1.jpg"):
+            examples.append("example1.jpg")
+        if os.path.exists("example2.jpg"):
+            examples.append("example2.jpg")
+            
+        if examples:  # 只有在有示例图片时才添加Examples组件
+            gr.Examples(
+                examples=examples,
+                inputs=input_image,
+                outputs=[output_image, result_text],
+                fn=detect_objects,
+                cache_examples=True,
+            )
+    except Exception as e:
+        print(f"Warning: Could not load example images: {e}")
 
 # API端点
 @app.post("/detect/")