Merge pull request #101 from heyongjian/ios-style

Ios style
fix bug JOUL-100,getless than wallpaper when you first get a list of wallpaper {state:-1}.

add the "state" judgement.
Merge pull request #238 from whuthm/ios-style

fix bug JOYL-100,get less than wallpaper when you first get a list of wallpaper {state:-1}.