关于Flutter报Cannot run with sound null safety
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flutter sdk 版本升级到2.0或者更高的版本后,运行之前的代码会报错,比如:
Error: Cannot run with sound null safety, because the following dependencies
dont support null safety:
- package:flutter_swiper
- package:flutter_page_indicator
- package:transformer_page_view
For solutions, see https://dart.dev/go/unsound-null-safety
FAILURE: Build failed with an exception.
上面的问题是,这些包不支持 safety模式。我们可以在运行的时候添加--no-sound-null-safety
。打开android Studio,然后依次选择【Run】 -->【 Edit Configurations】 --> 【Add Additional Run args 】–> 【–no-sound-null-safety】,如下图。
然后,再次运行就没有错误了。
除了上面找个方法外,对于一些老的项目,我们还可以通过降低sdk版本的方式来解决报错,比如。
sdk: ">=2.12.0 <3.0.0" 改为 sdk: ">=2.8.0 <3.0.0"
因为sdk 2.12 以上版本有了空安全要求。
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