dart - Flutter null-safety migration

Question

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

When I use the dart migration tool, it suggests that casting for builder of AnimatedBuilder:

Added a cast to an expression (non-downcast)

Is this really necessary?

与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…

1.4k views

1 Answer

深蓝 · Answer 1 · 2021-01-26T20:36:58+0000

answered Jan 27, 2021 by 深蓝 (71.8m points)

等待大神答复

与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…