实现翻页,如果图片文件中有不是图片格式的他不会显示，我让它自动跳过去。还有当图片到达文件末尾，上下页按钮不能用并给出提示。改观了软件的外观，稍微美观了些-The realization of page, if there is not a picture format image files in him will not be displayed, I let it jump past. And when the picture reaches the end of the file, the