Merge pull request #89 from heyongjian/ios-style

Ios style
Merge pull request #90 from heyongjian/ios-style

Ios style
fix bug issue-51, add the fade animation for loading progressbar.

add the fade animation for loading progressbar.
Merge pull request #200 from whuthm/ios-style

fix bug issue-51, add the fade animation for loading progressbar.