Merge pull request #187 from whuthm/ios-style

fix bug issue-46, when show the online wallpaper , need a long time to load wallpaper.
fix bug,issue-47,unified format for the download apk name
fix bug,issue-48,after the download is complete, the progress bar does not disappear
wanghao:optimized code,is printed log for download
Merge pull request #191 from lwanghaol/ios-style

fix bug,issue-48,after the download is complete, the progress bar does not disappear
Merge pull request #89 from heyongjian/ios-style

Ios style