Merge pull request #55 from heyongjian/ios-style

Ios style
Merge pull request #56 from heyongjian/ios-style

Ios style
wanghao:fix bug issue-44,solve messy display when backup
wanghao:fix bug issue-45,add the default file type
Merge pull request #183 from lwanghaol/ios-style

wanghao:fix bug issue-45,add the default file type