根据identifier从StoryBoard中获取对象，UIButton的图片文件位置

@import url(http://i.cnblogs.com/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);

- (id)readViewControllerFromStoryBoardWithIdentifier:(NSString *)identifier

{

return [[UIStoryboard storyboardWithName:@"ELVStoryBoard" bundle:nil] instantiateViewControllerWithIdentifier:identifier];

}

[backBtn , 0, 0, 44)];

@import url(http://i.cnblogs.com/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);