StackFit 继承自： Enum

How to size the non-positioned children of a Stack.

枚举值

名称	类型	默认值	说明
LOOSE	—	'loose'	The constraints passed to the stack from its parent are loosened. For example, if the stack has constraints that force it to 350x600, then this would allow the non-positioned children of the stack to have any width from zero to 350 and any height from zero to 600.
EXPAND	—	'expand'	The constraints passed to the stack from its parent are tightened to the biggest size allowed. For example, if the Stack has loose constraints with a width in the range 10 to 100 and a height in the range 0 to 600, then the non-positioned children of the stack would all be sized as 100 pixels wide and 600 high.
PASS_THROUGH	—	'passThrough'	The constraints passed to the stack from its parent are passed unmodified to the non-positioned children. For example, if a Stack is an expanded child of a Row, the horizontal constraints will be tight and the vertical constraints will be loose.