>弹性布局样式：
flex: num,
flexDirection: 主轴方向 row | column
alignItems: 交叉轴对齐方式'flex-start,flex-end,center,stretch'
justifyContent: 主轴对齐方式 center,flex-start,flex-end,space-between,space-round;
alignSelf: item元素对齐方式，
flexWrap : 是否包裹item元素
>layout布局样式
position : absolute,relative,
left : num
top : num,
right : num,
bottom :num,
width : num,
height : num,
padding : num,
margin : num,
paddingLeft : num,
paddingTop: num.
paddingBottom : num
paddingRight: num,
marginLeft : num,
marginTop: num,
marginBottom: num,
marginRight:num,
>字体样式
fontSize : num
fontFamily: string
fontStyle: string
color : string
>边框样式：
borderWidth: num,
borderColor : string
borderStyle : string,
borderRadius : num
borderBootomLeftRadius: num
borderBottomRightRadius: num
borderTopLeftRadius: num,
borderTopRightRadius: num,
>背景样式
backgourndColor : string
>盒阴影和文本阴影
shadowColor : string
shadowOffset : num,
shadowOpacity : string,
shadowRadius : num,
textShadowColor:string
textShadoeOpacity: num
textShadowOffset: num
textShaowRadius : num;
>变形transform:
rotation : num
scaleX : numm
scaleY : num,
translateX : num,
translateY : num,
transform : string,
>其他
backfaceVisibility : string,
lineHeight : num,
letterSpacing: num;
opacity : num
overflow : string
resizeMode : string
