B参照A定位,B的上边置于A的下边用到的属性是
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B参照A定位,B的上边置于A的下边用到的属性是
A.layout()constraintRight()toLeftOf
B.layout()constraintTop()toBottomOf
C.layout()constraintTop()toLeftOf
D.layout()constraintTop()toTopOf
参考答案: