i have some question about libcss parse shorthand properties

[lionxing]

hi guys: 

i building libcss to iOS , libcss is a awesome framework, but now i have some 
problem to use libcss ,
when is parse shorthand properties like this “.one {background: white url() 
no-repaet center Top;}” 
i found it doesn’t work, maybe i must be implement some css_select_handler 
function? 
who can help me ? thanks at all!